MOLGW package: fix dependence to threaded MKL (#39028)

* molgw package.py

* molgw package.py almost ready

* bug fix in molgw package.py

* MOLGW v3.2

* black pass

* duplicated line eliminated

* remove FIXME in the header

* add me as a maintainer

* fix previous commit

* sort the imports in the order spack wants

* chop the too-long lines

* many fixes

- variants before dependences
- eliminate useless build and install stages
- no openmp with intel-mkl was broken

* after blackization

* cleaning

* Update var/spack/repos/builtin/packages/molgw/package.py

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

* Update var/spack/repos/builtin/packages/molgw/package.py

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

* Update var/spack/repos/builtin/packages/molgw/package.py

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

* Update var/spack/repos/builtin/packages/molgw/package.py

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

* Update var/spack/repos/builtin/packages/molgw/package.py

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

* use threaded mkl when openmp is triggered

---------

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

.git-blame-ignore-revs

@@ -1,3 +1,5 @@
 # .git-blame-ignore-revs
-# Formatted entire codebase with black
+# Formatted entire codebase with black 23
+603569e321013a1a63a637813c94c2834d0a0023
+# Formatted entire codebase with black 22
 f52f6e99dbf1131886a80112b8c79dfc414afb7c

.gitattributes

@@ -1,3 +1,4 @@
 *.py diff=python
 *.lp linguist-language=Prolog
 lib/spack/external/* linguist-vendored
+*.bat text eol=crlf

.github/ISSUE_TEMPLATE/build_error.yml

@@ -9,7 +9,7 @@ body:
         Thanks for taking the time to report this build failure. To proceed with the report please:
         1. Title the issue `Installation issue: <name-of-the-package>`.
         2. Provide the information required below.
-        
+
         We encourage you to try, as much as possible, to reduce your problem to the minimal example that still reproduces the issue. That would help us a lot in fixing it quickly and effectively!
   - type: textarea
     id: reproduce
@@ -29,7 +29,9 @@ body:
       description: |
         Please post the error message from spack inside the `<details>` tag below:
       value: |
-        <details><summary>Error message</summary><pre>
+        <details><summary>Error message</summary>
+
+        <pre>
         ...
         </pre></details>
     validations:
@@ -53,7 +55,7 @@ body:
         Please upload the following files:
         * **`spack-build-out.txt`**
         * **`spack-build-env.txt`**
-        
+
         They should be present in the stage directory of the failing build. Also upload any `config.log` or similar file if one exists.
   - type: markdown
     attributes:

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,4 +1,4 @@
-name: "\U0001F38A Feature request" 
+name: "\U0001F38A Feature request"
 description: Suggest adding a feature that is not yet in Spack
 labels: [feature]
 body:
@@ -29,13 +29,11 @@ body:
     attributes:
       label: General information
       options:
-        - label: I have run `spack --version` and reported the version of Spack
-          required: true
         - label: I have searched the issues of this repo and believe this is not a duplicate
           required: true
   - type: markdown
     attributes:
       value: |
         If you want to ask a question about the tool (how to use it, what it can currently do, etc.), try the `#general` channel on [our Slack](https://slack.spack.io/) first. We have a welcoming community and chances are you'll get your reply faster and without opening an issue.
-        
+
         Other than that, thanks for taking the time to contribute to Spack!

.github/ISSUE_TEMPLATE/test_error.yml

@@ -21,7 +21,9 @@ body:
       description: |
         Please post the error message from spack inside the `<details>` tag below:
       value: |
-        <details><summary>Error message</summary><pre>
+        <details><summary>Error message</summary>
+
+        <pre>
         ...
         </pre></details>
     validations:

.github/dependabot.yml

@@ -5,3 +5,8 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
+  # Requirements to build documentation
+  - package-ecosystem: "pip"
+    directory: "/lib/spack/docs"
+    schedule:
+      interval: "daily"

.github/workflows/audit.yaml

@@ -17,15 +17,18 @@ concurrency:
 jobs:
   # Run audits on all the packages in the built-in repository
   package-audits:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.operating_system }}
+    strategy:
+      matrix:
+        operating_system: ["ubuntu-latest", "macos-latest"]
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # @v2
       with:
         python-version: ${{inputs.python_version}}
     - name: Install Python packages
       run: |
-        pip install --upgrade pip six setuptools pytest codecov coverage[toml]
+        pip install --upgrade pip setuptools pytest coverage[toml]
     - name: Package audits (with coverage)
       if: ${{ inputs.with_coverage == 'true' }}
       run: |
@@ -38,7 +41,7 @@ jobs:
       run: |
           . share/spack/setup-env.sh
           $(which spack) audit packages
-    - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70 # @v2.1.0
+    - uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d # @v2.1.0
       if: ${{ inputs.with_coverage == 'true' }}
       with:
-        flags: unittests,linux,audits
+        flags: unittests,audits

.github/workflows/bootstrap.yml

@@ -24,7 +24,7 @@ jobs:
               make patch unzip which xz python3 python3-devel tree \
               cmake bison bison-devel libstdc++-static
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
         with:
           fetch-depth: 0
       - name: Setup non-root user
@@ -62,7 +62,7 @@ jobs:
               make patch unzip xz-utils python3 python3-dev tree \
               cmake bison
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
         with:
           fetch-depth: 0
       - name: Setup non-root user
@@ -99,7 +99,7 @@ jobs:
               bzip2 curl file g++ gcc gfortran git gnupg2 gzip \
               make patch unzip xz-utils python3 python3-dev tree
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
         with:
           fetch-depth: 0
       - name: Setup non-root user
@@ -133,7 +133,7 @@ jobs:
               make patch unzip which xz python3 python3-devel tree \
               cmake bison
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
         with:
           fetch-depth: 0
       - name: Setup repo
@@ -158,7 +158,7 @@ jobs:
         run: |
           brew install cmake bison@2.7 tree
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
       - name: Bootstrap clingo
         run: |
           source share/spack/setup-env.sh
@@ -179,7 +179,7 @@ jobs:
         run: |
           brew install tree
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
       - name: Bootstrap clingo
         run: |
           set -ex
@@ -204,7 +204,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
         with:
           fetch-depth: 0
       - name: Setup repo
@@ -247,7 +247,7 @@ jobs:
               bzip2 curl file g++ gcc patchelf gfortran git gzip \
               make patch unzip xz-utils python3 python3-dev tree
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
         with:
           fetch-depth: 0
       - name: Setup non-root user
@@ -283,7 +283,7 @@ jobs:
               make patch unzip xz-utils python3 python3-dev tree \
               gawk
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
         with:
           fetch-depth: 0
       - name: Setup non-root user
@@ -316,7 +316,7 @@ jobs:
           # Remove GnuPG since we want to bootstrap it
           sudo rm -rf /usr/local/bin/gpg
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
       - name: Bootstrap GnuPG
         run: |
           source share/spack/setup-env.sh
@@ -333,7 +333,7 @@ jobs:
           # Remove GnuPG since we want to bootstrap it
           sudo rm -rf /usr/local/bin/gpg
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
       - name: Bootstrap GnuPG
         run: |
           source share/spack/setup-env.sh

.github/workflows/build-containers.yml

@@ -45,12 +45,18 @@ jobs:
                      [leap15, 'linux/amd64,linux/arm64,linux/ppc64le', 'opensuse/leap:15'],
                      [ubuntu-bionic, 'linux/amd64,linux/arm64,linux/ppc64le', 'ubuntu:18.04'],
                      [ubuntu-focal, 'linux/amd64,linux/arm64,linux/ppc64le', 'ubuntu:20.04'],
-                     [ubuntu-jammy, 'linux/amd64,linux/arm64,linux/ppc64le', 'ubuntu:22.04']]
+                     [ubuntu-jammy, 'linux/amd64,linux/arm64,linux/ppc64le', 'ubuntu:22.04'],
+                     [almalinux8, 'linux/amd64,linux/arm64,linux/ppc64le', 'almalinux:8'],
+                     [almalinux9, 'linux/amd64,linux/arm64,linux/ppc64le', 'almalinux:9'],
+                     [rockylinux8, 'linux/amd64,linux/arm64', 'rockylinux:8'],
+                     [rockylinux9, 'linux/amd64,linux/arm64', 'rockylinux:9'],
+                     [fedora37, 'linux/amd64,linux/arm64,linux/ppc64le', 'fedora:37'],
+                     [fedora38, 'linux/amd64,linux/arm64,linux/ppc64le', 'fedora:38']]
     name: Build ${{ matrix.dockerfile[0] }}
     if: github.repository == 'spack/spack'
     steps:
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
 
       - name: Set Container Tag Normal (Nightly)
         run: |
@@ -86,13 +92,13 @@ jobs:
           path: dockerfiles
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@e81a89b1732b9c48d79cd809d8d81d79c4647a18 # @v1
+        uses: docker/setup-qemu-action@2b82ce82d56a2a04d2637cd93a637ae1b359c0a7 # @v1
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@f03ac48505955848960e80bbb68046aa35c7b9e7 # @v1
+        uses: docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1 # @v1
 
       - name: Log in to GitHub Container Registry
-        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # @v1
+        uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # @v1
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -100,13 +106,13 @@ jobs:
 
       - name: Log in to DockerHub
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # @v1
+        uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # @v1
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build & Deploy ${{ matrix.dockerfile[0] }}
-        uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671 # @v2
+        uses: docker/build-push-action@2eb1c1961a95fc15694676618e422e8ba1d63825 # @v2
         with:
           context: dockerfiles/${{ matrix.dockerfile[0] }}
           platforms: ${{ matrix.dockerfile[1] }}

.github/workflows/ci.yaml

@@ -35,7 +35,7 @@ jobs:
       core: ${{ steps.filter.outputs.core }}
       packages: ${{ steps.filter.outputs.packages }}
     steps:
-      - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+      - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
         if: ${{ github.event_name == 'push' }}
         with:
           fetch-depth: 0

.github/workflows/nightly-win-builds.yml

@@ -0,0 +1,31 @@
+name: Windows Paraview Nightly
+
+on:
+  schedule:
+    - cron: '0 2 * * *' # Run at 2 am
+
+defaults:
+  run:
+    shell:
+     powershell Invoke-Expression -Command "./share/spack/qa/windows_test_setup.ps1"; {0}
+
+
+jobs:
+  build-paraview-deps:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
+      with:
+        fetch-depth: 0
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1
+      with:
+        python-version: 3.9
+    - name: Install Python packages
+      run: |
+          python -m pip install --upgrade pip six pywin32 setuptools coverage
+    - name: Build Test
+      run: |
+        spack compiler find
+        spack external find cmake ninja win-sdk win-wdk wgl msmpi
+        spack -d install -y --cdash-upload-url https://cdash.spack.io/submit.php?project=Spack+on+Windows --cdash-track Nightly --only dependencies paraview
+        exit 0

.github/workflows/unit_tests.yaml

@@ -47,10 +47,10 @@ jobs:
           on_develop: false
 
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # @v2
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install System packages
@@ -62,7 +62,7 @@ jobs:
               cmake bison libbison-dev kcov
     - name: Install Python packages
       run: |
-          pip install --upgrade pip six setuptools pytest codecov[toml] pytest-xdist pytest-cov
+          pip install --upgrade pip setuptools pytest pytest-xdist pytest-cov
           pip install --upgrade flake8 "isort>=4.3.5" "mypy>=0.900" "click" "black"
     - name: Setup git configuration
       run: |
@@ -87,17 +87,17 @@ jobs:
           UNIT_TEST_COVERAGE: ${{ matrix.python-version == '3.11' }}
       run: |
           share/spack/qa/run-unit-tests
-    - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
+    - uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d
       with:
         flags: unittests,linux,${{ matrix.concretizer }}
   # Test shell integration
   shell:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # @v2
       with:
         python-version: '3.11'
     - name: Install System packages
@@ -107,7 +107,7 @@ jobs:
           sudo apt-get install -y coreutils kcov csh zsh tcsh fish dash bash
     - name: Install Python packages
       run: |
-          pip install --upgrade pip six setuptools pytest codecov coverage[toml] pytest-xdist
+          pip install --upgrade pip setuptools pytest coverage[toml] pytest-xdist
     - name: Setup git configuration
       run: |
           # Need this for the git tests to succeed.
@@ -118,7 +118,7 @@ jobs:
           COVERAGE: true
       run: |
           share/spack/qa/run-shell-tests
-    - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
+    - uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d
       with:
         flags: shelltests,linux
 
@@ -133,10 +133,11 @@ jobs:
           dnf install -y \
               bzip2 curl file gcc-c++ gcc gcc-gfortran git gnupg2 gzip \
               make patch tcl unzip which xz
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
     - name: Setup repo and non-root user
       run: |
           git --version
+          git config --global --add safe.directory /__w/spack/spack
           git fetch --unshallow
           . .github/workflows/setup_git.sh
           useradd spack-test
@@ -151,10 +152,10 @@ jobs:
   clingo-cffi:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # @v2
       with:
         python-version: '3.11'
     - name: Install System packages
@@ -163,7 +164,7 @@ jobs:
           sudo apt-get -y install coreutils cvs gfortran graphviz gnupg2 mercurial ninja-build kcov
     - name: Install Python packages
       run: |
-          pip install --upgrade pip six setuptools pytest codecov coverage[toml] pytest-cov clingo pytest-xdist
+          pip install --upgrade pip setuptools pytest coverage[toml] pytest-cov clingo pytest-xdist
     - name: Setup git configuration
       run: |
           # Need this for the git tests to succeed.
@@ -175,7 +176,7 @@ jobs:
           SPACK_TEST_SOLVER: clingo
       run: |
           share/spack/qa/run-unit-tests
-    - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70 # @v2.1.0
+    - uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d # @v2.1.0
       with:
         flags: unittests,linux,clingo
   # Run unit tests on MacOS
@@ -185,16 +186,16 @@ jobs:
       matrix:
         python-version: ["3.10"]
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # @v2
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install Python packages
       run: |
-          pip install --upgrade pip six setuptools
-          pip install --upgrade pytest codecov coverage[toml] pytest-xdist pytest-cov
+          pip install --upgrade pip setuptools
+          pip install --upgrade pytest coverage[toml] pytest-xdist pytest-cov
     - name: Setup Homebrew packages
       run: |
         brew install dash fish gcc gnupg2 kcov
@@ -210,6 +211,6 @@ jobs:
         $(which spack) solve zlib
         common_args=(--dist loadfile --tx '4*popen//python=./bin/spack-tmpconfig python -u ./bin/spack python' -x)
         $(which spack) unit-test --cov --cov-config=pyproject.toml --cov-report=xml:coverage.xml "${common_args[@]}"
-    - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
+    - uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d
       with:
         flags: unittests,macos

.github/workflows/valid-style.yml

@@ -18,8 +18,8 @@ jobs:
   validate:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # @v2
       with:
         python-version: '3.11'
         cache: 'pip'
@@ -35,16 +35,16 @@ jobs:
   style:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # @v2
       with:
         python-version: '3.11'
         cache: 'pip'
     - name: Install Python packages
       run: |
-        python3 -m pip install --upgrade pip six setuptools types-six black==22.12.0 mypy isort clingo flake8
+        python3 -m pip install --upgrade pip setuptools types-six black==23.1.0 mypy isort clingo flake8
     - name: Setup git configuration
       run: |
         # Need this for the git tests to succeed.
@@ -58,3 +58,30 @@ jobs:
     with:
       with_coverage: ${{ inputs.with_coverage }}
       python_version: '3.11'
+  # Check that spack can bootstrap the development environment on Python 3.6 - RHEL8
+  bootstrap-dev-rhel8:
+    runs-on: ubuntu-latest
+    container: registry.access.redhat.com/ubi8/ubi
+    steps:
+      - name: Install dependencies
+        run: |
+          dnf install -y \
+              bzip2 curl file gcc-c++ gcc gcc-gfortran git gnupg2 gzip \
+              make patch tcl unzip which xz
+      - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # @v2
+      - name: Setup repo and non-root user
+        run: |
+          git --version
+          git config --global --add safe.directory /__w/spack/spack
+          git fetch --unshallow
+          . .github/workflows/setup_git.sh
+          useradd spack-test
+          chown -R spack-test .
+      - name: Bootstrap Spack development environment
+        shell: runuser -u spack-test -- bash {0}
+        run: |
+          source share/spack/setup-env.sh
+          spack debug report
+          spack -d bootstrap now --dev
+          spack style -t black
+          spack unit-test -V

.github/workflows/windows_python.yml

@@ -15,15 +15,15 @@ jobs:
   unit-tests:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1
       with:
         python-version: 3.9
     - name: Install Python packages
       run: |
-          python -m pip install --upgrade pip six pywin32 setuptools codecov pytest-cov clingo
+          python -m pip install --upgrade pip pywin32 setuptools pytest-cov clingo
     - name: Create local develop
       run: |
         ./.github/workflows/setup_git.ps1
@@ -33,21 +33,21 @@ jobs:
         ./share/spack/qa/validate_last_exit.ps1
         coverage combine -a
         coverage xml
-    - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
+    - uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d
       with:
         flags: unittests,windows
   unit-tests-cmd:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1
       with:
         python-version: 3.9
     - name: Install Python packages
       run: |
-          python -m pip install --upgrade pip six pywin32 setuptools codecov coverage pytest-cov clingo
+          python -m pip install --upgrade pip pywin32 setuptools coverage pytest-cov clingo
     - name: Create local develop
       run: |
         ./.github/workflows/setup_git.ps1
@@ -57,99 +57,24 @@ jobs:
         ./share/spack/qa/validate_last_exit.ps1
         coverage combine -a
         coverage xml
-    - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
+    - uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d
       with:
         flags: unittests,windows
   build-abseil:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435
+    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1
       with:
         python-version: 3.9
     - name: Install Python packages
       run: |
-          python -m pip install --upgrade pip six pywin32 setuptools codecov coverage
+          python -m pip install --upgrade pip pywin32 setuptools coverage
     - name: Build Test
       run: |
         spack compiler find
         spack external find cmake
         spack external find ninja
         spack -d install abseil-cpp
-  # TODO: johnwparent - reduce the size of the installer operations
-  # make-installer:
-  #   runs-on: windows-latest
-  #   steps:
-  #   - name: Disable Windows Symlinks
-  #     run: |
-  #       git config --global core.symlinks false
-  #     shell:
-  #       powershell
-  #   - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
-  #     with:
-  #       fetch-depth: 0
-  #   - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435
-  #     with:
-  #       python-version: 3.9
-  #   - name: Install Python packages
-  #     run: |
-  #         python -m pip install --upgrade pip six pywin32 setuptools
-  #   - name: Add Light and Candle to Path
-  #     run: |
-  #       $env:WIX >> $GITHUB_PATH
-  #   - name: Run Installer
-  #     run: |
-  #       ./share/spack/qa/setup_spack_installer.ps1
-  #       spack make-installer -s . -g SILENT pkg
-  #       echo "installer_root=$((pwd).Path)" | Out-File -FilePath $Env:GITHUB_ENV -Encoding utf8 -Append
-  #     env:
-  #       ProgressPreference: SilentlyContinue
-  #   - uses: actions/upload-artifact@83fd05a356d7e2593de66fc9913b3002723633cb
-  #     with:
-  #       name: Windows Spack Installer Bundle
-  #       path: ${{ env.installer_root }}\pkg\Spack.exe
-  #   - uses: actions/upload-artifact@83fd05a356d7e2593de66fc9913b3002723633cb
-  #     with:
-  #       name: Windows Spack Installer
-  #       path: ${{ env.installer_root}}\pkg\Spack.msi
-  # execute-installer:
-  #   needs: make-installer
-  #   runs-on: windows-latest
-  #   defaults:
-  #     run:
-  #       shell: pwsh
-  #   steps:
-  #   - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435
-  #     with:
-  #       python-version: 3.9
-  #   - name: Install Python packages
-  #     run: |
-  #         python -m pip install --upgrade pip six pywin32 setuptools
-  #   - name: Setup installer directory
-  #     run: |
-  #       mkdir -p spack_installer
-  #       echo "spack_installer=$((pwd).Path)\spack_installer" | Out-File -FilePath $Env:GITHUB_ENV -Encoding utf8 -Append
-  #   - uses: actions/download-artifact@v3
-  #     with:
-  #       name: Windows Spack Installer Bundle
-  #       path: ${{ env.spack_installer }}
-  #   - name: Execute Bundled Installer
-  #     run: |
-  #       $proc = Start-Process  ${{ env.spack_installer }}\spack.exe "/install /quiet" -Passthru
-  #       $handle = $proc.Handle # cache proc.Handle
-  #       $proc.WaitForExit();
-  #       $LASTEXITCODE
-  #     env:
-  #       ProgressPreference: SilentlyContinue
-  #   - uses: actions/download-artifact@v3
-  #     with:
-  #       name: Windows Spack Installer
-  #       path: ${{ env.spack_installer }}
-  #   - name: Execute MSI
-  #     run: |
-  #       $proc = Start-Process  ${{ env.spack_installer }}\spack.msi "/quiet" -Passthru
-  #       $handle = $proc.Handle # cache proc.Handle
-  #       $proc.WaitForExit();
-  #       $LASTEXITCODE

.readthedocs.yml

@@ -1,10 +1,16 @@
 version: 2
 
+build:
+  os: "ubuntu-22.04"
+  apt_packages:
+    - graphviz
+  tools:
+    python: "3.11"
+
 sphinx:
   configuration: lib/spack/docs/conf.py
   fail_on_warning: true
 
 python:
-  version: 3.7
   install:
     - requirements: lib/spack/docs/requirements.txt

CHANGELOG.md

@@ -1,3 +1,264 @@
+# v0.20.1 (2023-07-10)
+
+## Spack Bugfixes
+
+- Spec removed from an environment where not actually removed if `--force` was not given (#37877)
+- Speed-up module file generation (#37739)
+- Hotfix for a few recipes that treat CMake as a link dependency (#35816)
+- Fix re-running stand-alone test a second time, which was getting a trailing spurious failure (#37840)
+- Fixed reading JSON manifest on Cray, reporting non-concrete specs (#37909)
+- Fixed a few bugs when generating Dockerfiles from Spack (#37766,#37769)
+- Fixed a few long-standing bugs when generating module files (#36678,#38347,#38465,#38455)
+- Fixed issues with building Python extensions using an external Python (#38186)
+- Fixed compiler removal from command line (#38057)
+- Show external status as [e] (#33792)
+- Backported `archspec` fixes (#37793)
+- Improved a few error messages (#37791)
+
+
+# v0.20.0 (2023-05-21)
+
+`v0.20.0` is a major feature release.
+
+## Features in this release
+
+1. **`requires()` directive and enhanced package requirements**
+
+   We've added some more enhancements to requirements in Spack (#36286).
+
+   There is a new `requires()` directive for packages. `requires()` is the opposite of
+   `conflicts()`. You can use it to impose constraints on this package when certain
+   conditions are met:
+
+   ```python
+   requires(
+       "%apple-clang",
+       when="platform=darwin",
+       msg="This package builds only with clang on macOS"
+   )
+   ```
+
+   More on this in [the docs](
+     https://spack.rtfd.io/en/latest/packaging_guide.html#conflicts-and-requirements).
+
+   You can also now add a `when:` clause to `requires:` in your `packages.yaml`
+   configuration or in an environment:
+
+   ```yaml
+   packages:
+     openmpi:
+       require:
+       - any_of: ["%gcc"]
+         when: "@:4.1.4"
+         message: "Only OpenMPI 4.1.5 and up can build with fancy compilers"
+   ```
+
+   More details can be found [here](
+     https://spack.readthedocs.io/en/latest/build_settings.html#package-requirements)
+
+2. **Exact versions**
+
+   Spack did not previously have a way to distinguish a version if it was a prefix of
+   some other version. For example, `@3.2` would match `3.2`, `3.2.1`, `3.2.2`, etc. You
+   can now match *exactly* `3.2` with `@=3.2`. This is useful, for example, if you need
+   to patch *only* the `3.2` version of a package. The new syntax is described in [the docs](
+     https://spack.readthedocs.io/en/latest/basic_usage.html#version-specifier).
+
+   Generally, when writing packages, you should prefer to use ranges like `@3.2` over
+   the specific versions, as this allows the concretizer more leeway when selecting
+   versions of dependencies. More details and recommendations are in the [packaging guide](
+     https://spack.readthedocs.io/en/latest/packaging_guide.html#ranges-versus-specific-versions).
+
+   See #36273 for full details on the version refactor.
+
+3. **New testing interface**
+
+   Writing package tests is now much simpler with a new [test interface](
+     https://spack.readthedocs.io/en/latest/packaging_guide.html#stand-alone-tests).
+
+   Writing a test is now as easy as adding a method that starts with `test_`:
+
+   ```python
+   class MyPackage(Package):
+       ...
+
+       def test_always_fails(self):
+           """use assert to always fail"""
+           assert False
+
+       def test_example(self):
+           """run installed example"""
+           example = which(self.prefix.bin.example)
+           example()
+    ```
+
+    You can use Python's native `assert` statement to implement your checks -- no more
+    need to fiddle with `run_test` or other test framework methods. Spack will
+    introspect the class and run `test_*` methods when you run `spack test`,
+
+4. **More stable concretization**
+
+   * Now, `spack concretize` will *only* concretize the new portions of the environment
+     and will not change existing parts of an environment unless you specify `--force`.
+     This has always been true for `unify:false`, but not for `unify:true` and
+     `unify:when_possible` environments. Now it is true for all of them (#37438, #37681).
+
+   * The concretizer has a new `--reuse-deps` argument that *only* reuses dependencies.
+     That is, it will always treat the *roots* of your environment as it would with
+     `--fresh`. This allows you to upgrade just the roots of your environment while
+     keeping everything else stable (#30990).
+
+5. **Weekly develop snapshot releases**
+
+   Since last year, we have maintained a buildcache of `develop` at
+   https://binaries.spack.io/develop, but the cache can grow to contain so many builds
+   as to be unwieldy. When we get a stable `develop` build, we snapshot the release and
+   add a corresponding tag the Spack repository. So, you can use a stack from a specific
+   day. There are now tags in the spack repository like:
+
+   * `develop-2023-05-14`
+   * `develop-2023-05-18`
+
+   that correspond to build caches like:
+
+   * https://binaries.spack.io/develop-2023-05-14/e4s
+   * https://binaries.spack.io/develop-2023-05-18/e4s
+
+   We plan to store these snapshot releases weekly.
+
+6. **Specs in buildcaches can be referenced by hash.**
+
+   * Previously, you could run `spack buildcache list` and see the hashes in
+     buildcaches, but referring to them by hash would fail.
+   * You can now run commands like `spack spec` and `spack install` and refer to
+     buildcache hashes directly, e.g. `spack install /abc123` (#35042)
+
+7. **New package and buildcache index websites**
+
+   Our public websites for searching packages have been completely revamped and updated.
+   You can check them out here:
+
+   * *Package Index*: https://packages.spack.io
+   * *Buildcache Index*: https://cache.spack.io
+
+   Both are searchable and more interactive than before. Currently major releases are
+   shown; UI for browsing `develop` snapshots is coming soon.
+
+8. **Default CMake and Meson build types are now Release**
+
+   Spack has historically defaulted to building with optimization and debugging, but
+   packages like `llvm` can be enormous with debug turned on. Our default build type for
+   all Spack packages is now `Release` (#36679, #37436). This has a number of benefits:
+
+   * much smaller binaries;
+   * higher default optimization level; and
+   * defining `NDEBUG` disables assertions, which may lead to further speedups.
+
+   You can still get the old behavior back through requirements and package preferences.
+
+## Other new commands and directives
+
+* `spack checksum` can automatically add new versions to package (#24532)
+* new command: `spack pkg grep` to easily search package files (#34388)
+* New `maintainers` directive (#35083)
+* Add `spack buildcache push` (alias to `buildcache create`) (#34861)
+* Allow using `-j` to control the parallelism of concretization (#37608)
+* Add `--exclude` option to 'spack external find' (#35013)
+
+## Other new features of note
+
+* editing: add higher-precedence `SPACK_EDITOR` environment variable
+* Many YAML formatting improvements from updating `ruamel.yaml` to the latest version
+  supporting Python 3.6. (#31091, #24885, #37008).
+* Requirements and preferences should not define (non-git) versions (#37687, #37747)
+* Environments now store spack version/commit in `spack.lock` (#32801)
+* User can specify the name of the `packages` subdirectory in repositories (#36643)
+* Add container images supporting RHEL alternatives (#36713)
+* make version(...) kwargs explicit (#36998)
+
+## Notable refactors
+
+* buildcache create: reproducible tarballs (#35623)
+* Bootstrap most of Spack dependencies using environments (#34029)
+* Split `satisfies(..., strict=True/False)` into two functions (#35681)
+* spack install: simplify behavior when inside environments (#35206)
+
+## Binary cache and stack updates
+
+* Major simplification of CI boilerplate in stacks (#34272, #36045)
+* Many improvements to our CI pipeline's reliability
+
+## Removals, Deprecations, and disablements
+* Module file generation is disabled by default; you'll need to enable it to use it (#37258)
+* Support for Python 2 was deprecated in `v0.19.0` and has been removed. `v0.20.0` only
+  supports Python 3.6 and higher.
+* Deprecated target names are no longer recognized by Spack. Use generic names instead:
+  * `graviton` is now `cortex_a72`
+  * `graviton2` is now `neoverse_n1`
+  * `graviton3` is now `neoverse_v1`
+* `blacklist` and `whitelist` in module configuration were deprecated in `v0.19.0` and are
+  removed in this release. Use `exclude` and `include` instead.
+* The `ignore=` parameter of the `extends()` directive has been removed. It was not used by
+  any builtin packages and is no longer needed to avoid conflicts in environment views (#35588).
+* Support for the old YAML buildcache format has been removed. It was deprecated in `v0.19.0` (#34347).
+* `spack find --bootstrap` has been removed. It was deprecated in `v0.19.0`. Use `spack
+  --bootstrap find` instead (#33964).
+* `spack bootstrap trust` and `spack bootstrap untrust` are now removed, having been
+  deprecated in `v0.19.0`. Use `spack bootstrap enable` and `spack bootstrap disable`.
+* The `--mirror-name`, `--mirror-url`, and `--directory` options to buildcache and
+  mirror commands were deprecated in `v0.19.0` and have now been removed. They have been
+  replaced by positional arguments (#37457).
+* Deprecate `env:` as top level environment key (#37424)
+* deprecate buildcache create --rel, buildcache install --allow-root (#37285)
+* Support for very old perl-like spec format strings (e.g., `$_$@$%@+$+$=`) has been
+  removed (#37425). This was deprecated in in `v0.15` (#10556).
+
+## Notable Bugfixes
+
+* bugfix: don't fetch package metadata for unknown concrete specs (#36990)
+* Improve package source code context display on error  (#37655)
+* Relax environment manifest filename requirements and lockfile identification criteria (#37413)
+* `installer.py`: drop build edges of installed packages by default (#36707)
+* Bugfix: package requirements with git commits (#35057, #36347)
+* Package requirements: allow single specs in requirement lists (#36258)
+* conditional variant values: allow boolean (#33939)
+* spack uninstall: follow run/link edges on --dependents (#34058)
+
+## Spack community stats
+
+* 7,179 total packages, 499 new since `v0.19.0`
+    * 329 new Python packages
+    * 31 new R packages
+* 336 people contributed to this release
+    * 317 committers to packages
+    * 62 committers to core
+
+
+# v0.19.1 (2023-02-07)
+
+### Spack Bugfixes
+
+* `buildcache create`: make "file exists" less verbose (#35019)
+* `spack mirror create`: don't change paths to urls (#34992)
+* Improve error message for requirements (#33988)
+* uninstall: fix accidental cubic complexity (#34005)
+* scons: fix signature for `install_args` (#34481)
+* Fix `combine_phase_logs` text encoding issues (#34657)
+* Use a module-like object to propagate changes in the MRO, when setting build env (#34059)
+* PackageBase should not define builder legacy attributes (#33942)
+* Forward lookup of the "run_tests" attribute (#34531)
+* Bugfix for timers (#33917, #33900)
+* Fix path handling in prefix inspections (#35318)
+* Fix libtool filter for Fujitsu compilers (#34916)
+* Bug fix for duplicate rpath errors on macOS when creating build caches (#34375)
+* FileCache: delete the new cache file on exception (#34623)
+* Propagate exceptions from Spack python console (#34547)
+* Tests: Fix a bug/typo in a `config_values.py` fixture (#33886)
+* Various CI fixes (#33953, #34560, #34560, #34828)
+* Docs: remove monitors and analyzers, typos (#34358, #33926)
+* bump release version for tutorial command (#33859)
+
+
 # v0.19.0 (2022-11-11)
 
 `v0.19.0` is a major feature release.

bin/spack

@@ -25,8 +25,6 @@ exit 1
 # Line above is a shell no-op, and ends a python multi-line comment.
 # The code above runs this file with our preferred python interpreter.
 
-from __future__ import print_function
-
 import os
 import os.path
 import sys

bin/spack-tmpconfig

@@ -72,6 +72,7 @@ config:
     root: $TMP_DIR/install
   misc_cache: $$user_cache_path/cache
   source_cache: $$user_cache_path/source
+  environments_root: $TMP_DIR/envs
 EOF
 cat >"$SPACK_USER_CONFIG_PATH/bootstrap.yaml" <<EOF
 bootstrap:

bin/spack.bat

@@ -50,24 +50,69 @@ setlocal enabledelayedexpansion
 :: flags will always start with '-', e.g. --help or -V
 :: subcommands will never start with '-'
 :: everything after the subcommand is an arg
-for %%x in (%*) do (
-    set t="%%~x"
+
+:: we cannot allow batch "for" loop to directly process CL args
+:: a number of batch reserved characters are commonly passed to
+:: spack and allowing batch's "for" method to process the raw inputs
+:: results in a large number of formatting issues
+:: instead, treat the entire CLI as one string
+:: and split by space manually
+:: capture cl args in variable named cl_args
+set cl_args=%*
+:process_cl_args
+rem  tokens=1* returns the first processed token produced
+rem  by tokenizing the input string cl_args on spaces into
+rem  the named variable %%g
+rem  While this make look like a for loop, it only
+rem  executes a single time for each of the cl args
+rem  the actual iterative loop is performed by the
+rem  goto process_cl_args stanza
+rem  we are simply leveraging the "for" method's string
+rem  tokenization
+for /f "tokens=1*" %%g in ("%cl_args%") do (
+    set t=%%~g
+    rem  remainder of string is composed into %%h
+    rem  these are the cl args yet to be processed
+    rem  assign cl_args var to only the args to be processed
+    rem  effectively discarding the current arg %%g
+    rem  this will be nul when we have no further tokens to process
+    set cl_args=%%h
+    rem  process the first space delineated cl arg
+    rem  of this iteration
     if "!t:~0,1!" == "-" (
         if defined _sp_subcommand (
-            :: We already have a subcommand, processing args now
-            set "_sp_args=!_sp_args! !t!"
+            rem  We already have a subcommand, processing args now
+            if not defined _sp_args (
+                set "_sp_args=!t!"
+            ) else (
+                set "_sp_args=!_sp_args! !t!"
+            )
         ) else (
-            set "_sp_flags=!_sp_flags! !t!"
-            shift
+            if not defined _sp_flags (
+                set "_sp_flags=!t!"
+                shift
+            ) else (
+                set "_sp_flags=!_sp_flags! !t!"
+                shift
+            )
         )
     ) else if not defined _sp_subcommand (
         set "_sp_subcommand=!t!"
         shift
     ) else (
-        set "_sp_args=!_sp_args! !t!"
-        shift
+        if not defined _sp_args (
+            set "_sp_args=!t!"
+            shift
+        ) else (
+            set "_sp_args=!_sp_args! !t!"
+            shift
+        )
     )
 )
+rem  if this is not nil, we have more tokens to process
+rem  start above process again with remaining unprocessed cl args
+if defined cl_args goto :process_cl_args
+
 
 :: --help, -h and -V flags don't require further output parsing.
 :: If we encounter, execute and exit
@@ -95,31 +140,21 @@ if not defined _sp_subcommand (
 
 :: pass parsed variables outside of local scope. Need to do
 :: this because delayedexpansion can only be set by setlocal
-echo %_sp_flags%>flags
-echo %_sp_args%>args
-echo %_sp_subcommand%>subcmd
-endlocal
-set /p _sp_subcommand=<subcmd
-set /p _sp_flags=<flags
-set /p _sp_args=<args
-if "%_sp_subcommand%"=="ECHO is off." (set "_sp_subcommand=")
-if "%_sp_subcommand%"=="ECHO is on." (set "_sp_subcommand=")
-if "%_sp_flags%"=="ECHO is off." (set "_sp_flags=")
-if "%_sp_flags%"=="ECHO is on." (set "_sp_flags=")
-if "%_sp_args%"=="ECHO is off." (set "_sp_args=")
-if "%_sp_args%"=="ECHO is on." (set "_sp_args=")
-del subcmd
-del flags
-del args
+endlocal & (
+    set "_sp_flags=%_sp_flags%"
+    set "_sp_args=%_sp_args%"
+    set "_sp_subcommand=%_sp_subcommand%"
+)
+
 
 :: Filter out some commands. For any others, just run the command.
-if %_sp_subcommand% == "cd" (
+if "%_sp_subcommand%" == "cd" (
     goto :case_cd
-) else if %_sp_subcommand% == "env" (
+) else if "%_sp_subcommand%" == "env" (
     goto :case_env
-) else if %_sp_subcommand% == "load" (
+) else if "%_sp_subcommand%" == "load" (
     goto :case_load
-) else if %_sp_subcommand% == "unload" (
+) else if "%_sp_subcommand%" == "unload" (
     goto :case_load
 ) else (
     goto :default_case
@@ -154,20 +189,20 @@ goto :end_switch
 if NOT defined _sp_args (
     goto :default_case
 )
-set args_no_quote=%_sp_args:"=%
-if NOT "%args_no_quote%"=="%args_no_quote:--help=%" (
+
+if NOT "%_sp_args%"=="%_sp_args:--help=%" (
     goto :default_case
-) else if NOT "%args_no_quote%"=="%args_no_quote: -h=%" (
+) else if NOT "%_sp_args%"=="%_sp_args: -h=%" (
     goto :default_case
-) else if NOT "%args_no_quote%"=="%args_no_quote:--bat=%" (
+) else if NOT "%_sp_args%"=="%_sp_args:--bat=%" (
     goto :default_case
-) else if NOT "%args_no_quote%"=="%args_no_quote:deactivate=%" (
+) else if NOT "%_sp_args%"=="%_sp_args:deactivate=%" (
     for /f "tokens=* USEBACKQ" %%I in (
-        `call python %spack% %_sp_flags% env deactivate --bat %args_no_quote:deactivate=%`
+        `call python %spack% %_sp_flags% env deactivate --bat %_sp_args:deactivate=%`
     ) do %%I
-) else if NOT "%args_no_quote%"=="%args_no_quote:activate=%" (
+) else if NOT "%_sp_args%"=="%_sp_args:activate=%" (
     for /f "tokens=* USEBACKQ" %%I in (
-        `python %spack% %_sp_flags% env activate --bat %args_no_quote:activate=%`
+        `python %spack% %_sp_flags% env activate --bat %_sp_args:activate=%`
     ) do %%I
 ) else (
     goto :default_case
@@ -179,7 +214,7 @@ goto :end_switch
 if defined _sp_args (
     if NOT "%_sp_args%"=="%_sp_args:--help=%" (
         goto :default_case
-    ) else if NOT "%_sp_args%"=="%_sp_args: -h=%" (
+    ) else if NOT "%_sp_args%"=="%_sp_args:-h=%" (
         goto :default_case
     ) else if NOT "%_sp_args%"=="%_sp_args:--bat=%" (
         goto :default_case
@@ -188,7 +223,7 @@ if defined _sp_args (
 
 for /f "tokens=* USEBACKQ" %%I in (
     `python "%spack%" %_sp_flags% %_sp_subcommand% --bat %_sp_args%`) do %%I
-)
+
 goto :end_switch
 
 :case_unload
@@ -226,7 +261,7 @@ for %%Z in ("%_pa_new_path%") do if EXIST %%~sZ\NUL (
 exit /b 0
 
 :: set module system roots
-:_sp_multi_pathadd 
+:_sp_multi_pathadd
 for %%I in (%~2) do (
     for %%Z in (%_sp_compatible_sys_types%) do (
         :pathadd "%~1" "%%I\%%Z"

bin/spack.ps1

@@ -0,0 +1,132 @@
+#  Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
+#  Spack Project Developers. See the top-level COPYRIGHT file for details.
+
+#  SPDX-License-Identifier: (Apache-2.0 OR MIT)
+# #######################################################################
+
+function Compare-CommonArgs {
+    $CMDArgs = $args[0]
+    # These aruments take precedence and call for no futher parsing of arguments
+    # invoke actual Spack entrypoint with that context and exit after
+    "--help", "-h", "--version", "-V" | ForEach-Object {
+        $arg_opt = $_
+        if(($CMDArgs) -and ([bool]($CMDArgs.Where({$_ -eq $arg_opt})))) {
+            return $true
+        }
+    }
+    return $false
+}
+
+function Read-SpackArgs {
+    $SpackCMD_params = @()
+    $SpackSubCommand = $NULL
+    $SpackSubCommandArgs = @()
+    $args_ = $args[0]
+    $args_ | ForEach-Object {
+        if (!$SpackSubCommand) {
+            if($_.SubString(0,1) -eq "-")
+            {
+                $SpackCMD_params += $_
+            }
+            else{
+                $SpackSubCommand = $_
+            }
+        }
+        else{
+            $SpackSubCommandArgs += $_
+        }
+    }
+    return $SpackCMD_params, $SpackSubCommand, $SpackSubCommandArgs
+}
+
+function Invoke-SpackCD {
+    if (Compare-CommonArgs $SpackSubCommandArgs) {
+        python $Env:SPACK_ROOT/bin/spack cd -h
+    }
+    else {
+        $LOC = $(python $Env:SPACK_ROOT/bin/spack location $SpackSubCommandArgs)
+        if (($NULL -ne $LOC)){
+            if ( Test-Path -Path $LOC){
+                Set-Location $LOC
+            }
+            else{
+                exit 1
+            }
+        }
+        else {
+            exit 1
+        }
+    }
+}
+
+function Invoke-SpackEnv {
+    if (Compare-CommonArgs $SpackSubCommandArgs[0]) {
+        python $Env:SPACK_ROOT/bin/spack env -h
+    }
+    else {
+        $SubCommandSubCommand = $SpackSubCommandArgs[0]
+        $SubCommandSubCommandArgs = $SpackSubCommandArgs[1..$SpackSubCommandArgs.Count]
+        switch ($SubCommandSubCommand) {
+            "activate" {
+                if (Compare-CommonArgs $SubCommandSubCommandArgs) {
+                    python $Env:SPACK_ROOT/bin/spack env activate $SubCommandSubCommandArgs
+                }
+                elseif ([bool]($SubCommandSubCommandArgs.Where({$_ -eq "--pwsh"}))) {
+                    python $Env:SPACK_ROOT/bin/spack env activate $SubCommandSubCommandArgs
+                }
+                elseif (!$SubCommandSubCommandArgs) {
+                    python $Env:SPACK_ROOT/bin/spack env activate $SubCommandSubCommandArgs
+                }
+                else {
+                    $SpackEnv = $(python $Env:SPACK_ROOT/bin/spack $SpackCMD_params env activate "--pwsh" $SubCommandSubCommandArgs)
+                    $ExecutionContext.InvokeCommand($SpackEnv)
+                }
+            }
+            "deactivate" {
+                if ([bool]($SubCommandSubCommandArgs.Where({$_ -eq "--pwsh"}))) {
+                    python $Env:SPACK_ROOT/bin/spack env deactivate $SubCommandSubCommandArgs
+                }
+                elseif($SubCommandSubCommandArgs) {
+                    python $Env:SPACK_ROOT/bin/spack env deactivate -h
+                }
+                else {
+                    $SpackEnv = $(python $Env:SPACK_ROOT/bin/spack $SpackCMD_params env deactivate --pwsh)
+                    $ExecutionContext.InvokeCommand($SpackEnv)
+                }
+            }
+            default {python $Env:SPACK_ROOT/bin/spack $SpackCMD_params $SpackSubCommand $SpackSubCommandArgs}
+        }
+    }
+}
+
+function Invoke-SpackLoad {
+    if (Compare-CommonArgs $SpackSubCommandArgs) {
+        python $Env:SPACK_ROOT/bin/spack $SpackCMD_params $SpackSubCommand $SpackSubCommandArgs
+    }
+    elseif ([bool]($SpackSubCommandArgs.Where({($_ -eq "--pwsh") -or ($_ -eq "--list")}))) {
+        python $Env:SPACK_ROOT/bin/spack $SpackCMD_params $SpackSubCommand $SpackSubCommandArgs
+    }
+    else {
+        $SpackEnv = $(python $Env:SPACK_ROOT/bin/spack $SpackCMD_params $SpackSubCommand "--pwsh" $SpackSubCommandArgs)
+        $ExecutionContext.InvokeCommand($SpackEnv)
+    }
+}
+
+
+$SpackCMD_params, $SpackSubCommand, $SpackSubCommandArgs = Read-SpackArgs $args
+
+if (Compare-CommonArgs $SpackCMD_params) {
+    python $Env:SPACK_ROOT/bin/spack $SpackCMD_params $SpackSubCommand $SpackSubCommandArgs
+    exit $LASTEXITCODE
+}
+
+# Process Spack commands with special conditions
+# all other commands are piped directly to Spack
+switch($SpackSubCommand)
+{
+    "cd"     {Invoke-SpackCD}
+    "env"    {Invoke-SpackEnv}
+    "load"   {Invoke-SpackLoad}
+    "unload" {Invoke-SpackLoad}
+    default  {python $Env:SPACK_ROOT/bin/spack $SpackCMD_params $SpackSubCommand $SpackSubCommandArgs}
+}

etc/spack/defaults/concretizer.yaml

@@ -13,16 +13,18 @@ concretizer:
   # Whether to consider installed packages or packages from buildcaches when
   # concretizing specs. If `true`, we'll try to use as many installs/binaries
   # as possible, rather than building. If `false`, we'll always give you a fresh
-  # concretization.
-  reuse: true
+  # concretization. If `dependencies`, we'll only reuse dependencies but
+  # give you a fresh concretization for your root specs.
+  reuse: dependencies
   # Options that tune which targets are considered for concretization. The
   # concretization process is very sensitive to the number targets, and the time
   # needed to reach a solution increases noticeably with the number of targets
   # considered.
   targets:
-    # Determine whether we want to target specific or generic microarchitectures.
-    # An example of the first kind might be for instance "skylake" or "bulldozer",
-    # while generic microarchitectures are for instance "aarch64" or "x86_64_v4".
+    # Determine whether we want to target specific or generic
+    # microarchitectures. Valid values are: "microarchitectures" or "generic".
+    # An example of "microarchitectures" would be "skylake" or "bulldozer",
+    # while an example of "generic" would be "aarch64" or "x86_64_v4".
     granularity: microarchitectures
     # If "false" allow targets that are incompatible with the current host (for
     # instance concretize with target "icelake" while running on "haswell").
@@ -33,4 +35,4 @@ concretizer:
   # environments can always be activated. When "false" perform concretization separately
   # on each root spec, allowing different versions and variants of the same package in
   # an environment.
-  unify: true
+  unify: true

etc/spack/defaults/config.yaml

@@ -81,6 +81,10 @@ config:
   source_cache: $spack/var/spack/cache
 
 
+  ## Directory where spack managed environments are created and stored
+  # environments_root: $spack/var/spack/environments
+
+
   # Cache directory for miscellaneous files, like the package index.
   # This can be purged with `spack clean --misc-cache`
   misc_cache: $user_cache_path/cache
@@ -181,7 +185,7 @@ config:
   # when Spack needs to manage its own package metadata and all operations are
   # expected to complete within the default time limit. The timeout should
   # therefore generally be left untouched.
-  db_lock_timeout: 3
+  db_lock_timeout: 60
 
 
   # How long to wait when attempting to modify a package (e.g. to install it).
@@ -212,10 +216,11 @@ config:
   # manipulation by unprivileged user (e.g. AFS)
   allow_sgid: true
 
-  # Whether to set the terminal title to display status information during
-  # building and installing packages. This gives information about Spack's
-  # current progress as well as the current and total number of packages.
-  terminal_title: false
+  # Whether to show status information during building and installing packages.
+  # This gives information about Spack's current progress as well as the current
+  # and total number of packages. Information is shown both in the terminal
+  # title and inline.
+  install_status: true
 
   # Number of seconds a buildcache's index.json is cached locally before probing
   # for updates, within a single Spack invocation. Defaults to 10 minutes.

etc/spack/defaults/darwin/packages.yaml

@@ -23,8 +23,20 @@ packages:
     providers:
       elf: [libelf]
       fuse: [macfuse]
+      gl: [apple-gl]
+      glu: [apple-glu]
       unwind: [apple-libunwind]
       uuid: [apple-libuuid]
+  apple-gl:
+    buildable: false
+    externals:
+    - spec: apple-gl@4.1.0
+      prefix: /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
+  apple-glu:
+    buildable: false
+    externals:
+    - spec: apple-glu@1.3.0
+      prefix: /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
   apple-libunwind:
     buildable: false
     externals:

etc/spack/defaults/mirrors.yaml

@@ -1,2 +1,4 @@
 mirrors:
-  spack-public: https://mirror.spack.io
+  spack-public:
+    binary: false
+    url: https://mirror.spack.io

etc/spack/defaults/modules.yaml

@@ -40,13 +40,12 @@ modules:
     roots:
      tcl:    $spack/share/spack/modules
      lmod:   $spack/share/spack/lmod
-    # What type of modules to use
-    enable:
-      - tcl
+    # What type of modules to use ("tcl" and/or "lmod")
+    enable: []
 
     tcl:
       all:
-        autoload: none
+        autoload: direct
 
     # Default configurations if lmod is enabled
     lmod:

etc/spack/defaults/packages.yaml

@@ -20,7 +20,7 @@ packages:
       awk: [gawk]
       blas: [openblas, amdblis]
       D: [ldc]
-      daal: [intel-daal]
+      daal: [intel-oneapi-daal]
       elf: [elfutils]
       fftw-api: [fftw, amdfftw]
       flame: [libflame, amdlibflame]
@@ -28,9 +28,9 @@ packages:
       gl: [glx, osmesa]
       glu: [mesa-glu, openglu]
       golang: [go, gcc]
-      go-external-or-gccgo-bootstrap: [go-bootstrap, gcc]
+      go-or-gccgo-bootstrap: [go-bootstrap, gcc]
       iconv: [libiconv]
-      ipp: [intel-ipp]
+      ipp: [intel-oneapi-ipp]
       java: [openjdk, jdk, ibm-java]
       jpeg: [libjpeg-turbo, libjpeg]
       lapack: [openblas, amdlibflame]
@@ -40,7 +40,7 @@ packages:
       lua-lang: [lua, lua-luajit-openresty, lua-luajit]
       luajit: [lua-luajit-openresty, lua-luajit]
       mariadb-client: [mariadb-c-client, mariadb]
-      mkl: [intel-mkl]
+      mkl: [intel-oneapi-mkl]
       mpe: [mpe2]
       mpi: [openmpi, mpich]
       mysql-client: [mysql, mariadb-c-client]

etc/spack/defaults/windows/config.yaml

@@ -3,3 +3,4 @@ config:
   concretizer: clingo
   build_stage::
     - '$spack/.staging'
+  stage_name: '{name}-{version}-{hash:7}'

etc/spack/defaults/windows/packages.yaml

@@ -19,3 +19,4 @@ packages:
     - msvc
     providers:
       mpi: [msmpi]
+      gl: [wgl]

lib/spack/docs/.gitignore

@@ -5,3 +5,4 @@ llnl*.rst
 _build
 .spack-env
 spack.lock
+_spack_root

lib/spack/docs/_pygments/style.py

@@ -0,0 +1,16 @@
+# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+# The name of the Pygments (syntax highlighting) style to use.
+# We use our own extension of the default style with a few modifications
+from pygments.styles.default import DefaultStyle
+from pygments.token import Generic
+
+
+class SpackStyle(DefaultStyle):
+    styles = DefaultStyle.styles.copy()
+    background_color = "#f4f4f8"
+    styles[Generic.Output] = "#355"
+    styles[Generic.Prompt] = "bold #346ec9"

lib/spack/docs/basic_usage.rst

@@ -942,7 +942,7 @@ first ``libelf`` above, you would run:
 
    $ spack load /qmm4kso
 
-To see which packages that you have loaded to your enviornment you would
+To see which packages that you have loaded to your environment you would
 use ``spack find --loaded``.
 
 .. code-block:: console
@@ -1103,16 +1103,31 @@ Below are more details about the specifiers that you can add to specs.
 Version specifier
 ^^^^^^^^^^^^^^^^^
 
-A version specifier comes somewhere after a package name and starts
-with ``@``.  It can be a single version, e.g. ``@1.0``, ``@3``, or
-``@1.2a7``.  Or, it can be a range of versions, such as ``@1.0:1.5``
-(all versions between ``1.0`` and ``1.5``, inclusive).  Version ranges
-can be open, e.g. ``:3`` means any version up to and including ``3``.
-This would include ``3.4`` and ``3.4.2``.  ``4.2:`` means any version
-above and including ``4.2``.  Finally, a version specifier can be a
-set of arbitrary versions, such as ``@1.0,1.5,1.7`` (``1.0``, ``1.5``,
-or ``1.7``).  When you supply such a specifier to ``spack install``,
-it constrains the set of versions that Spack will install.
+A version specifier ``pkg@<specifier>`` comes after a package name
+and starts with ``@``. It can be something abstract that matches
+multiple known versions, or a specific version. During concretization,
+Spack will pick the optimal version within the spec's constraints
+according to policies set for the particular Spack installation.
+
+The version specifier can be *a specific version*, such as ``@=1.0.0`` or
+``@=1.2a7``. Or, it can be *a range of versions*, such as ``@1.0:1.5``.
+Version ranges are inclusive, so this example includes both ``1.0``
+and any ``1.5.x`` version. Version ranges can be unbounded, e.g. ``@:3``
+means any version up to and including ``3``. This would include ``3.4``
+and ``3.4.2``.  Similarly, ``@4.2:`` means any version above and including
+``4.2``.  As a short-hand, ``@3`` is equivalent to the range ``@3:3`` and
+includes any version with major version ``3``.
+
+Notice that you can distinguish between the specific version ``@=3.2`` and
+the range ``@3.2``. This is useful for packages that follow a versioning
+scheme that omits the zero patch version number: ``3.2``, ``3.2.1``,
+``3.2.2``, etc. In general it is preferable to use the range syntax
+``@3.2``, since ranges also match versions with one-off suffixes, such as
+``3.2-custom``.
+
+A version specifier can also be a list of ranges and specific versions,
+separated by commas.  For example, ``@1.0:1.5,=1.7.1`` matches any version
+in the range ``1.0:1.5`` and the specific version ``1.7.1``.
 
 For packages with a ``git`` attribute, ``git`` references
 may be specified instead of a numerical version i.e. branches, tags
@@ -1121,36 +1136,35 @@ reference provided.  Acceptable syntaxes for this are:
 
 .. code-block:: sh
 
-    # branches and tags
-   foo@git.develop # use the develop branch
-   foo@git.0.19 # use the 0.19 tag
-
     # commit hashes
    foo@abcdef1234abcdef1234abcdef1234abcdef1234    # 40 character hashes are automatically treated as git commits
    foo@git.abcdef1234abcdef1234abcdef1234abcdef1234
 
-Spack versions from git reference either have an associated version supplied by the user,
-or infer a relationship to known versions from the structure of the git repository. If an
-associated version is supplied by the user, Spack treats the git version as equivalent to that
-version for all version comparisons in the package logic (e.g. ``depends_on('foo', when='@1.5')``).
+    # branches and tags
+   foo@git.develop # use the develop branch
+   foo@git.0.19 # use the 0.19 tag
 
-The associated version can be assigned with ``[git ref]=[version]`` syntax, with the caveat that the specified version is known to Spack from either the package definition, or in the configuration preferences (i.e. ``packages.yaml``).
+Spack always needs to associate a Spack version with the git reference,
+which is used for version comparison. This Spack version is heuristically
+taken from the closest valid git tag among ancestors of the git ref.
+
+Once a Spack version is associated with a git ref, it always printed with
+the git ref.  For example, if the commit ``@git.abcdefg`` is tagged
+``0.19``, then the spec will be shown as ``@git.abcdefg=0.19``.
+
+If the git ref is not exactly a tag, then the distance to the nearest tag
+is also part of the resolved version. ``@git.abcdefg=0.19.git.8`` means
+that the commit is 8 commits away from the ``0.19`` tag.
+
+In cases where Spack cannot resolve a sensible version from a git ref,
+users can specify the Spack version to use for the git ref. This is done
+by appending ``=`` and the Spack version to the git ref. For example:
 
 .. code-block:: sh
 
    foo@git.my_ref=3.2 # use the my_ref tag or branch, but treat it as version 3.2 for version comparisons
    foo@git.abcdef1234abcdef1234abcdef1234abcdef1234=develop # use the given commit, but treat it as develop for version comparisons
 
-If an associated version is not supplied then the tags in the git repo are used to determine
-the most recent previous version known to Spack. Details about how versions are compared
-and how Spack determines if one version is less than another are discussed in the developer guide.
-
-If the version spec is not provided, then Spack will choose one
-according to policies set for the particular spack installation.  If
-the spec is ambiguous, i.e. it could match multiple versions, Spack
-will choose a version within the spec's constraints according to
-policies set for the particular Spack installation.
-
 Details about how versions are compared and how Spack determines if
 one version is less than another are discussed in the developer guide.
 

lib/spack/docs/binary_caches.rst

@@ -18,7 +18,7 @@ your Spack mirror and then downloaded and installed by others.
 
 Whenever a mirror provides prebuilt packages, Spack will take these packages
 into account during concretization and installation, making ``spack install``
-signficantly faster.
+significantly faster.
 
 
 .. note::
@@ -36,7 +36,7 @@ Build caches are created via:
 
 .. code-block:: console
 
-    $ spack buildcache create <path/url/mirror name> <spec>
+    $ spack buildcache push <path/url/mirror name> <spec>
 
 This command takes the locally installed spec and its dependencies, and
 creates tarballs of their install prefixes. It also generates metadata files,
@@ -48,14 +48,10 @@ Here is an example where a build cache is created in a local directory named
 
 .. code-block:: console
 
-    $ spack buildcache create --allow-root ./spack-cache ninja
+    $ spack buildcache push ./spack-cache ninja
     ==> Pushing binary packages to file:///home/spackuser/spack/spack-cache/build_cache
 
-Not that ``ninja`` must be installed locally for this to work.
-
-We're using the ``--allow-root`` flag to tell Spack that is OK when any of
-the binaries we're pushing contain references to the local Spack install
-directory.
+Note that ``ninja`` must be installed locally for this to work.
 
 Once you have a build cache, you can add it as a mirror, discussed next.
 
@@ -147,7 +143,7 @@ and then install from it exclusively, you would do:
 
     $ spack mirror add E4S https://cache.e4s.io
     $ spack buildcache keys --install --trust
-    $ spack install --use-buildache only <package>
+    $ spack install --use-buildcache only <package>
 
 We use ``--install`` and ``--trust`` to say that we are installing keys to our
 keyring, and trusting all downloaded keys.
@@ -177,7 +173,7 @@ need to be adjusted for better re-locatability.
 --------------------
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-``spack buildcache create``
+``spack buildcache push``
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Create tarball of installed Spack package and all dependencies.

lib/spack/docs/build_settings.rst

@@ -325,42 +325,99 @@ on the command line, because it can specify constraints on packages
 is not possible to specify constraints on dependencies while also keeping
 those dependencies optional.
 
-The package requirements configuration is specified in ``packages.yaml``
-keyed by package name:
+^^^^^^^^^^^^^^^^^^^
+Requirements syntax
+^^^^^^^^^^^^^^^^^^^
+
+The package requirements configuration is specified in ``packages.yaml``,
+keyed by package name and expressed using the Spec syntax. In the simplest
+case you can specify attributes that you always want the package to have
+by providing a single spec string to ``require``:
 
 .. code-block:: yaml
 
    packages:
      libfabric:
        require: "@1.13.2"
+
+In the above example, ``libfabric`` will always build with version 1.13.2. If you
+need to compose multiple configuration scopes ``require`` accepts a list of
+strings:
+
+.. code-block:: yaml
+
+   packages:
+     libfabric:
+       require:
+       - "@1.13.2"
+       - "%gcc"
+
+In this case ``libfabric`` will always build with version 1.13.2 **and** using GCC
+as a compiler.
+
+For more complex use cases, require accepts also a list of objects. These objects
+must have either a ``any_of`` or a ``one_of`` field, containing a list of spec strings,
+and they can optionally have a ``when`` and a ``message`` attribute:
+
+.. code-block:: yaml
+
+   packages:
      openmpi:
        require:
-       - any_of: ["~cuda", "%gcc"]
+       - any_of: ["@4.1.5", "%gcc"]
+         message: "in this example only 4.1.5 can build with other compilers"
+
+``any_of`` is a list of specs. One of those specs must be satisfied
+and it is also allowed for the concretized spec to match more than one.
+In the above example, that means you could build ``openmpi@4.1.5%gcc``,
+``openmpi@4.1.5%clang`` or ``openmpi@3.9%gcc``, but
+not ``openmpi@3.9%clang``.
+
+If a custom message is provided, and the requirement is not satisfiable,
+Spack will print the custom error message:
+
+.. code-block:: console
+
+   $ spack spec openmpi@3.9%clang
+   ==> Error: in this example only 4.1.5 can build with other compilers
+
+We could express a similar requirement using the ``when`` attribute:
+
+.. code-block:: yaml
+
+   packages:
+     openmpi:
+       require:
+       - any_of: ["%gcc"]
+         when: "@:4.1.4"
+         message: "in this example only 4.1.5 can build with other compilers"
+
+In the example above, if the version turns out to be 4.1.4 or less, we require the compiler to be GCC.
+For readability, Spack also allows a ``spec`` key accepting a string when there is only a single
+constraint:
+
+.. code-block:: yaml
+
+   packages:
+     openmpi:
+       require:
+       - spec: "%gcc"
+         when: "@:4.1.4"
+         message: "in this example only 4.1.5 can build with other compilers"
+
+This code snippet and the one before it are semantically equivalent.
+
+Finally, instead of ``any_of`` you can use ``one_of`` which also takes a list of specs. The final
+concretized spec must match one and only one of them:
+
+.. code-block:: yaml
+
+   packages:
      mpich:
-      require:
-      - one_of: ["+cuda", "+rocm"]
+       require:
+       - one_of: ["+cuda", "+rocm"]
 
-Requirements are expressed using Spec syntax (the same as what is provided
-to ``spack install``). In the simplest case, you can specify attributes
-that you always want the package to have by providing a single spec to
-``require``; in the above example, ``libfabric`` will always build
-with version 1.13.2.
-
-You can provide a more-relaxed constraint and allow the concretizer to
-choose between a set of options using ``any_of`` or ``one_of``:
-
-* ``any_of`` is a list of specs. One of those specs must be satisfied
-  and it is also allowed for the concretized spec to match more than one.
-  In the above example, that means you could build ``openmpi+cuda%gcc``,
-  ``openmpi~cuda%clang`` or ``openmpi~cuda%gcc`` (in the last case,
-  note that both specs in the ``any_of`` for ``openmpi`` are
-  satisfied).
-* ``one_of`` is also a list of specs, and the final concretized spec
-  must match exactly one of them.  In the above example, that means
-  you could build ``mpich+cuda`` or ``mpich+rocm`` but not
-  ``mpich+cuda+rocm`` (note the current package definition for
-  ``mpich`` already includes a conflict, so this is redundant but
-  still demonstrates the concept).
+In the example above, that means you could build ``mpich+cuda`` or ``mpich+rocm`` but not ``mpich+cuda+rocm``.
 
 .. note::
 
@@ -368,6 +425,13 @@ choose between a set of options using ``any_of`` or ``one_of``:
    preference: items that appear earlier in the list are preferred
    (note that these preferences can be ignored in favor of others).
 
+.. note::
+
+   When using a conditional requirement, Spack is allowed to actively avoid the triggering
+   condition (the ``when=...`` spec) if that leads to a concrete spec with better scores in
+   the optimization criteria. To check the current optimization criteria and their
+   priorities you can run ``spack solve zlib``.
+
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Setting default requirements
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

lib/spack/docs/build_systems/cudapackage.rst

@@ -28,11 +28,14 @@ This package provides the following variants:
 
 * **cuda_arch**
 
-  This variant supports the optional specification of the architecture.
+  This variant supports the optional specification of one or multiple architectures.
   Valid values are maintained in the ``cuda_arch_values`` property and
   are the numeric character equivalent of the compute capability version
   (e.g., '10' for version 1.0). Each provided value affects associated
   ``CUDA`` dependencies and compiler conflicts.
+  
+  The variant builds both PTX code for the _virtual_ architecture
+  (e.g. ``compute_10``) and binary code for the _real_ architecture (e.g. ``sm_10``).
 
   GPUs and their compute capability versions are listed at
   https://developer.nvidia.com/cuda-gpus .

lib/spack/docs/build_systems/inteloneapipackage.rst

@@ -76,6 +76,53 @@ To build with with ``icx``, do ::
 
   spack install patchelf%oneapi
 
+
+Using oneAPI Spack environment
+-------------------------------
+
+In this example, we build lammps with ``icx`` using Spack environment for oneAPI packages created by Intel. The
+compilers are installed with Spack like in example above.
+
+Install the oneAPI compilers::
+
+  spack install intel-oneapi-compilers
+
+Add the compilers to your ``compilers.yaml`` so Spack can use them::
+
+  spack compiler add `spack location -i intel-oneapi-compilers`/compiler/latest/linux/bin/intel64
+  spack compiler add `spack location -i intel-oneapi-compilers`/compiler/latest/linux/bin
+
+Verify that the compilers are available::
+
+  spack compiler list
+
+Clone `spack-configs <https://github.com/spack/spack-configs>`_ repo and activate Intel oneAPI CPU environment::
+
+  git clone https://github.com/spack/spack-configs
+  spack env activate spack-configs/INTEL/CPU
+  spack concretize -f
+
+`Intel oneAPI CPU environment <https://github.com/spack/spack-configs/blob/main/INTEL/CPU/spack.yaml>`_  contains applications tested and validated by Intel, this list is constantly extended. And currently it supports:
+
+- `GROMACS <https://www.gromacs.org/>`_
+- `HPCG <https://www.hpcg-benchmark.org/>`_
+- `HPL <https://netlib.org/benchmark/hpl/>`_
+- `LAMMPS <https://www.lammps.org/#gsc.tab=0>`_
+- `OpenFOAM <https://www.openfoam.com/>`_
+- `STREAM <https://www.cs.virginia.edu/stream/>`_
+- `WRF <https://github.com/wrf-model/WRF>`_
+
+To build lammps with oneAPI compiler from this environment just run::
+
+  spack install lammps
+
+Compiled binaries can be find using::
+
+  spack cd -i lammps
+
+You can do the same for all other applications from this environment.
+
+
 Using oneAPI MPI to Satisfy a Virtual Dependence
 ------------------------------------------------------
 
@@ -124,7 +171,7 @@ Using oneAPI Tools Installed by Spack
 =====================================
 
 Spack can be a convenient way to install and configure compilers and
-libaries, even if you do not intend to build a Spack package. If you
+libraries, even if you do not intend to build a Spack package. If you
 want to build a Makefile project using Spack-installed oneAPI compilers,
 then use spack to configure your environment::
 

lib/spack/docs/build_systems/intelpackage.rst

@@ -397,7 +397,7 @@ for specifics and examples for ``packages.yaml`` files.
 
 .. If your system administrator did not provide modules for pre-installed Intel
    tools, you could do well to ask for them, because installing multiple copies
-   of the Intel tools, as is wont to happen once Spack is in the picture, is
+   of the Intel tools, as is won't to happen once Spack is in the picture, is
    bound to stretch disk space and patience thin. If you *are* the system
    administrator and are still new to modules, then perhaps it's best to follow
    the `next section <Installing Intel tools within Spack_>`_ and install the tools
@@ -653,7 +653,7 @@ follow `the next section <intel-install-libs_>`_ instead.
    * If you specified a custom variant (for example ``+vtune``) you may want to add this as your
      preferred variant in the packages configuration for the ``intel-parallel-studio`` package
      as described in :ref:`package-preferences`. Otherwise you will have to specify
-     the variant everytime ``intel-parallel-studio`` is being used as ``mkl``, ``fftw`` or ``mpi``
+     the variant every time ``intel-parallel-studio`` is being used as ``mkl``, ``fftw`` or ``mpi``
      implementation to avoid pulling in a different variant.
 
    * To set the Intel compilers for default use in Spack, instead of the usual ``%gcc``,

lib/spack/docs/build_systems/pythonpackage.rst

@@ -366,7 +366,7 @@ If the ``pyproject.toml`` lists ``mesonpy`` as the ``build-backend``,
 it uses the meson build system. Meson uses the default
 ``pyproject.toml`` keys to list dependencies.
 
-See https://meson-python.readthedocs.io/en/latest/usage/start.html
+See https://meson-python.readthedocs.io/en/latest/tutorials/introduction.html
 for more information.
 
 """
@@ -582,7 +582,7 @@ libraries. Make sure not to add modules/packages containing the word
 "test", as these likely won't end up in the installation directory,
 or may require test dependencies like pytest to be installed.
 
-Instead of defining the ``import_modules`` explicity, only the subset
+Instead of defining the ``import_modules`` explicitly, only the subset
 of module names to be skipped can be defined by using ``skip_modules``.
 If a defined module has submodules, they are skipped as well, e.g.,
 in case the ``plotting`` modules should be excluded from the

lib/spack/docs/build_systems/sippackage.rst

@@ -72,7 +72,7 @@ arguments to the configure phase, you can use:
 
 .. code-block:: python
 
-   def configure_args(self, spec, prefix):
+   def configure_args(self):
        return ['--no-python-dbus']
 
 

lib/spack/docs/build_systems/wafpackage.rst

@@ -58,9 +58,7 @@ Testing
 ``WafPackage`` also provides ``test`` and ``installtest`` methods,
 which are run after the ``build`` and ``install`` phases, respectively.
 By default, these phases do nothing, but you can override them to
-run package-specific unit tests. For example, the
-`py-py2cairo <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/py-py2cairo/package.py>`_
-package uses:
+run package-specific unit tests.
 
 .. code-block:: python
 

lib/spack/docs/conf.py

@@ -89,6 +89,7 @@
 # Enable todo items
 todo_include_todos = True
 
+
 #
 # Disable duplicate cross-reference warnings.
 #
@@ -96,9 +97,7 @@ class PatchedPythonDomain(PythonDomain):
     def resolve_xref(self, env, fromdocname, builder, typ, target, node, contnode):
         if "refspecific" in node:
             del node["refspecific"]
-        return super(PatchedPythonDomain, self).resolve_xref(
-            env, fromdocname, builder, typ, target, node, contnode
-        )
+        return super().resolve_xref(env, fromdocname, builder, typ, target, node, contnode)
 
 
 #
@@ -148,7 +147,6 @@ def setup(sphinx):
 # Get nice vector graphics
 graphviz_output_format = "svg"
 
-
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]
 
@@ -214,8 +212,10 @@ def setup(sphinx):
     ("py:class", "spack.repo._PrependFileLoader"),
     ("py:class", "spack.build_systems._checks.BaseBuilder"),
     # Spack classes that intersphinx is unable to resolve
-    ("py:class", "spack.version.VersionBase"),
+    ("py:class", "spack.version.StandardVersion"),
     ("py:class", "spack.spec.DependencySpec"),
+    ("py:class", "spack.spec.SpecfileReaderBase"),
+    ("py:class", "spack.install_test.Pb"),
 ]
 
 # The reST default role (used for this markup: `text`) to use for all documents.
@@ -231,30 +231,8 @@ def setup(sphinx):
 # If true, sectionauthor and moduleauthor directives will be shown in the
 # output. They are ignored by default.
 # show_authors = False
-
-# The name of the Pygments (syntax highlighting) style to use.
-# We use our own extension of the default style with a few modifications
-from pygments.style import Style
-from pygments.styles.default import DefaultStyle
-from pygments.token import Comment, Generic, Text
-
-
-class SpackStyle(DefaultStyle):
-    styles = DefaultStyle.styles.copy()
-    background_color = "#f4f4f8"
-    styles[Generic.Output] = "#355"
-    styles[Generic.Prompt] = "bold #346ec9"
-
-
-import pkg_resources
-
-dist = pkg_resources.Distribution(__file__)
-sys.path.append(".")  # make 'conf' module findable
-ep = pkg_resources.EntryPoint.parse("spack = conf:SpackStyle", dist=dist)
-dist._ep_map = {"pygments.styles": {"plugin1": ep}}
-pkg_resources.working_set.add(dist)
-
-pygments_style = "spack"
+sys.path.append("./_pygments")
+pygments_style = "style.SpackStyle"
 
 # A list of ignored prefixes for module index sorting.
 # modindex_common_prefix = []
@@ -339,23 +317,20 @@ class SpackStyle(DefaultStyle):
 # Output file base name for HTML help builder.
 htmlhelp_basename = "Spackdoc"
 
-
 # -- Options for LaTeX output --------------------------------------------------
 
 latex_elements = {
     # The paper size ('letterpaper' or 'a4paper').
-    #'papersize': 'letterpaper',
+    # 'papersize': 'letterpaper',
     # The font size ('10pt', '11pt' or '12pt').
-    #'pointsize': '10pt',
+    # 'pointsize': '10pt',
     # Additional stuff for the LaTeX preamble.
-    #'preamble': '',
+    # 'preamble': '',
 }
 
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual]).
-latex_documents = [
-    ("index", "Spack.tex", "Spack Documentation", "Todd Gamblin", "manual"),
-]
+latex_documents = [("index", "Spack.tex", "Spack Documentation", "Todd Gamblin", "manual")]
 
 # The name of an image file (relative to this directory) to place at the top of
 # the title page.
@@ -402,7 +377,7 @@ class SpackStyle(DefaultStyle):
         "Spack",
         "One line description of project.",
         "Miscellaneous",
-    ),
+    )
 ]
 
 # Documents to append as an appendix to all manuals.
@@ -418,6 +393,4 @@ class SpackStyle(DefaultStyle):
 # -- Extension configuration -------------------------------------------------
 
 # sphinx.ext.intersphinx
-intersphinx_mapping = {
-    "python": ("https://docs.python.org/3", None),
-}
+intersphinx_mapping = {"python": ("https://docs.python.org/3", None)}

lib/spack/docs/config_yaml.rst

@@ -222,7 +222,7 @@ and location. (See the *Configuration settings* section of ``man
 ccache`` to learn more about the default settings and how to change
 them). Please note that we currently disable ccache's ``hash_dir``
 feature to avoid an issue with the stage directory (see
-https://github.com/LLNL/spack/pull/3761#issuecomment-294352232).
+https://github.com/spack/spack/pull/3761#issuecomment-294352232).
 
 -----------------------
 ``shared_linking:type``
@@ -292,12 +292,13 @@ It is also worth noting that:
          non_bindable_shared_objects = ["libinterface.so"]
 
 ----------------------
-``terminal_title``
+``install_status``
 ----------------------
 
-By setting this option to ``true``, Spack will update the terminal's title to
-provide information about its current progress as well as the current and
-total package numbers.
+When set to ``true``, Spack will show information about its current progress
+as well as the current and total package numbers. Progress is shown both
+in the terminal title and inline. Setting it to ``false`` will not show any
+progress information.
 
 To work properly, this requires your terminal to reset its title after
 Spack has finished its work, otherwise Spack's status information will

lib/spack/docs/configuration.rst

@@ -20,8 +20,9 @@ case you want to skip directly to specific docs:
 * :ref:`packages.yaml <build-settings>`
 * :ref:`repos.yaml <repositories>`
 
-You can also add any of these as inline configuration in ``spack.yaml``
-in an :ref:`environment <environment-configuration>`.
+You can also add any of these as inline configuration in the YAML
+manifest file (``spack.yaml``) describing an :ref:`environment
+<environment-configuration>`.
 
 -----------
 YAML Format
@@ -227,6 +228,9 @@ You can get the name to use for ``<platform>`` by running ``spack arch
 --platform``. The system config scope has a ``<platform>`` section for
 sites at which ``/etc`` is mounted on multiple heterogeneous machines.
 
+
+.. _config-scope-precedence:
+
 ----------------
 Scope Precedence
 ----------------
@@ -239,6 +243,11 @@ lower-precedence settings. Completely ignoring higher-level configuration
 options is supported with the ``::`` notation for keys (see
 :ref:`config-overrides` below).
 
+There are also special notations for string concatenation and precendense override.
+Using the ``+:`` notation  can be used to force *prepending* strings or lists. For lists, this is identical
+to the default behavior. Using the ``-:`` works similarly, but for *appending* values.
+:ref:`config-prepend-append`
+
 ^^^^^^^^^^^
 Simple keys
 ^^^^^^^^^^^
@@ -279,6 +288,47 @@ command:
        - ~/.spack/stage
 
 
+.. _config-prepend-append:
+
+^^^^^^^^^^^^^^^^^^^^
+String Concatenation
+^^^^^^^^^^^^^^^^^^^^
+
+Above, the user ``config.yaml`` *completely* overrides specific settings in the
+default ``config.yaml``. Sometimes, it is useful to add a suffix/prefix
+to a path or name. To do this, you can use the ``-:`` notation for *append*
+string concatenation at the end of a key in a configuration file. For example:
+
+.. code-block:: yaml
+   :emphasize-lines: 1
+   :caption: ~/.spack/config.yaml
+
+   config:
+     install_tree-: /my/custom/suffix/
+
+Spack will then append to the lower-precedence configuration under the
+``install_tree-:`` section:
+
+.. code-block:: console
+
+   $ spack config get config
+   config:
+     install_tree: /some/other/directory/my/custom/suffix
+     build_stage:
+       - $tempdir/$user/spack-stage
+       - ~/.spack/stage
+
+
+Similarly, ``+:`` can be used to *prepend* to a path or name:
+
+.. code-block:: yaml
+   :emphasize-lines: 1
+   :caption: ~/.spack/config.yaml
+
+   config:
+     install_tree+: /my/custom/suffix/
+
+
 .. _config-overrides:
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^

lib/spack/docs/containers.rst

@@ -143,6 +143,26 @@ The OS that are currently supported are summarized in the table below:
    * - Amazon Linux 2
      - ``amazonlinux:2``
      - ``spack/amazon-linux``
+   * - AlmaLinux 8
+     - ``almalinux:8``
+     - ``spack/almalinux8``
+   * - AlmaLinux 9
+     - ``almalinux:9``
+     - ``spack/almalinux9``
+   * - Rocky Linux 8
+     - ``rockylinux:8``
+     - ``spack/rockylinux8``
+   * - Rocky Linux 9
+     - ``rockylinux:9``
+     - ``spack/rockylinux9``
+   * - Fedora Linux 37
+     - ``fedora:37``
+     - ``spack/fedora37``
+   * - Fedora Linux 38
+     - ``fedora:38``
+     - ``spack/fedora38``
+
+
 
 All the images are tagged with the corresponding release of Spack:
 
@@ -444,6 +464,120 @@ attribute:
 The minimum version of Singularity required to build a SIF (Singularity Image Format)
 image from the recipes generated by Spack is ``3.5.3``.
 
+------------------------------
+Extending the Jinja2 Templates
+------------------------------
+
+The Dockerfile and the Singularity definition file that Spack can generate are based on
+a few Jinja2 templates that are rendered according to the environment being containerized.
+Even though Spack allows a great deal of customization by just setting appropriate values for
+the configuration options, sometimes that is not enough.
+
+In those cases, a user can directly extend the template that Spack uses to render the image
+to e.g. set additional environment variables or perform specific operations either before or
+after a given stage of the build. Let's consider as an example the following structure:
+
+.. code-block:: console
+
+   $ tree /opt/environment
+   /opt/environment
+   ├── data
+   │     └── data.csv
+   ├── spack.yaml
+   ├── data
+   └── templates
+       └── container
+           └── CustomDockerfile
+
+containing both the custom template extension and the environment manifest file. To use a custom
+template, the environment must register the directory containing it, and declare its use under the
+``container`` configuration:
+
+.. code-block:: yaml
+   :emphasize-lines: 7-8,12
+
+   spack:
+     specs:
+     - hdf5~mpi
+     concretizer:
+       unify: true
+     config:
+       template_dirs:
+       - /opt/environment/templates
+     container:
+       format: docker
+       depfile: true
+       template: container/CustomDockerfile
+
+The template extension can override two blocks, named ``build_stage`` and ``final_stage``, similarly to
+the example below:
+
+.. code-block::
+   :emphasize-lines: 3,8
+
+   {% extends "container/Dockerfile" %}
+   {% block build_stage %}
+   RUN echo "Start building"
+   {{ super() }}
+   {% endblock %}
+   {% block final_stage %}
+   {{ super() }}
+   COPY data /share/myapp/data
+   {% endblock %}
+
+The recipe that gets generated contains the two extra instruction that we added in our template extension:
+
+.. code-block:: Dockerfile
+   :emphasize-lines: 4,43
+
+   # Build stage with Spack pre-installed and ready to be used
+   FROM spack/ubuntu-jammy:latest as builder
+
+   RUN echo "Start building"
+
+   # What we want to install and how we want to install it
+   # is specified in a manifest file (spack.yaml)
+   RUN mkdir /opt/spack-environment \
+   &&  (echo "spack:" \
+   &&   echo "  specs:" \
+   &&   echo "  - hdf5~mpi" \
+   &&   echo "  concretizer:" \
+   &&   echo "    unify: true" \
+   &&   echo "  config:" \
+   &&   echo "    template_dirs:" \
+   &&   echo "    - /tmp/environment/templates" \
+   &&   echo "    install_tree: /opt/software" \
+   &&   echo "  view: /opt/view") > /opt/spack-environment/spack.yaml
+
+   # Install the software, remove unnecessary deps
+   RUN cd /opt/spack-environment && spack env activate . && spack concretize && spack env depfile -o Makefile && make -j $(nproc) && spack gc -y
+
+   # Strip all the binaries
+   RUN find -L /opt/view/* -type f -exec readlink -f '{}' \; | \
+       xargs file -i | \
+       grep 'charset=binary' | \
+       grep 'x-executable\|x-archive\|x-sharedlib' | \
+       awk -F: '{print $1}' | xargs strip -s
+
+   # Modifications to the environment that are necessary to run
+   RUN cd /opt/spack-environment && \
+       spack env activate --sh -d . >> /etc/profile.d/z10_spack_environment.sh
+
+   # Bare OS image to run the installed executables
+   FROM ubuntu:22.04
+
+   COPY --from=builder /opt/spack-environment /opt/spack-environment
+   COPY --from=builder /opt/software /opt/software
+   COPY --from=builder /opt/._view /opt/._view
+   COPY --from=builder /opt/view /opt/view
+   COPY --from=builder /etc/profile.d/z10_spack_environment.sh /etc/profile.d/z10_spack_environment.sh
+
+   COPY data /share/myapp/data
+
+   ENTRYPOINT ["/bin/bash", "--rcfile", "/etc/profile", "-l", "-c", "$*", "--" ]
+   CMD [ "/bin/bash" ]
+
+
 .. _container_config_options:
 
 -----------------------
@@ -464,6 +598,10 @@ to customize the generation of container recipes:
      - The format of the recipe
      - ``docker`` or ``singularity``
      - Yes
+   * - ``depfile``
+     - Whether to use a depfile for installation, or not
+     - True or False (default)
+     - No
    * - ``images:os``
      - Operating system used as a base for the image
      - See :ref:`containers-supported-os`
@@ -498,7 +636,7 @@ to customize the generation of container recipes:
      - No
    * - ``os_packages:command``
      - Tool used to manage system packages
-     - ``apt``, ``yum``
+     - ``apt``, ``yum``, ``dnf``, ``dnf_epel``, ``zypper``, ``apk``, ``yum_amazon``
      - Only with custom base images
    * - ``os_packages:update``
      - Whether or not to update the list of available packages
@@ -512,14 +650,6 @@ to customize the generation of container recipes:
      - System packages needed at run-time
      - Valid packages for the current OS
      - No
-   * - ``extra_instructions:build``
-     - Extra instructions (e.g. `RUN`, `COPY`, etc.) at the end of the ``build`` stage
-     - Anything understood by the current ``format``
-     - No
-   * - ``extra_instructions:final``
-     - Extra instructions (e.g. `RUN`, `COPY`, etc.) at the end of the ``final`` stage
-     - Anything understood by the current ``format``
-     - No
    * - ``labels``
      - Labels to tag the image
      - Pairs of key-value strings

lib/spack/docs/contribution_guide.rst

@@ -118,7 +118,7 @@ make another change, test that change, etc.  We use `pytest
 <http://pytest.org/>`_ as our tests framework, and these types of
 arguments are just passed to the ``pytest`` command underneath. See `the
 pytest docs
-<http://doc.pytest.org/en/latest/usage.html#specifying-tests-selecting-tests>`_
+<https://doc.pytest.org/en/latest/how-to/usage.html#specifying-which-tests-to-run>`_
 for more details on test selection syntax.
 
 ``spack unit-test`` has a few special options that can help you
@@ -147,7 +147,7 @@ you want to know about.  For example, to see just the tests in
 
 You can also combine any of these options with a ``pytest`` keyword
 search.  See the `pytest usage docs
-<https://docs.pytest.org/en/stable/usage.html#specifying-tests-selecting-tests>`_:
+<https://doc.pytest.org/en/latest/how-to/usage.html#specifying-which-tests-to-run>`_
 for more details on test selection syntax. For example, to see the names of all tests that have "spec"
 or "concretize" somewhere in their names:
 

lib/spack/docs/developer_guide.rst

@@ -472,7 +472,7 @@ use my new hook as follows:
 .. code-block:: python
 
     def post_log_write(message, level):
-        """Do something custom with the messsage and level every time we write
+        """Do something custom with the message and level every time we write
         to the log
         """
         print('running post_log_write!')

lib/spack/docs/environments.rst

@@ -58,9 +58,9 @@ Using Environments
 Here we follow a typical use case of creating, concretizing,
 installing and loading an environment.
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Creating a named Environment
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Creating a managed Environment
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 An environment is created by:
 
@@ -72,7 +72,8 @@ Spack then creates the directory ``var/spack/environments/myenv``.
 
 .. note::
 
-   All named environments are stored in the ``var/spack/environments`` folder.
+   All managed environments by default are stored in the ``var/spack/environments`` folder.
+   This location can be changed by setting the ``environments_root`` variable in ``config.yaml``.
 
 In the ``var/spack/environments/myenv`` directory, Spack creates the
 file ``spack.yaml`` and the hidden directory ``.spack-env``.
@@ -93,9 +94,9 @@ an Environment, the ``.spack-env`` directory also contains:
   * ``logs/``: A directory containing the build logs for the packages
     in this Environment.
 
-Spack Environments can also be created from either a ``spack.yaml``
-manifest or a ``spack.lock`` lockfile. To create an Environment from a
-``spack.yaml`` manifest:
+Spack Environments can also be created from either a manifest file
+(usually but not necessarily named, ``spack.yaml``) or a lockfile.
+To create an Environment from a manifest:
 
 .. code-block:: console
 
@@ -173,7 +174,7 @@ Anonymous specs can be created in place using the command:
 
    $ spack env create -d .
 
-In this case Spack simply creates a spack.yaml file in the requested
+In this case Spack simply creates a ``spack.yaml`` file in the requested
 directory.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -346,7 +347,7 @@ the Environment and then install the concretized specs.
    (see :ref:`build-jobs`). To speed up environment builds further, independent
    packages can be installed in parallel by launching more Spack instances. For
    example, the following will build at most four packages in parallel using
-   three background jobs: 
+   three background jobs:
 
    .. code-block:: console
 
@@ -394,7 +395,7 @@ version (and other constraints) passed as the spec argument to the
 
 For packages with ``git`` attributes, git branches, tags, and commits can
 also be used as valid concrete versions (see :ref:`version-specifier`).
-This means that for a package ``foo``, ``spack develop foo@git.main`` will clone 
+This means that for a package ``foo``, ``spack develop foo@git.main`` will clone
 the ``main`` branch of the package, and ``spack install`` will install from
 that git clone if ``foo`` is in the environment.
 Further development on ``foo`` can be tested by reinstalling the environment,
@@ -588,10 +589,11 @@ user support groups providing a large software stack for their HPC center.
 
 .. admonition:: Re-concretization of user specs
 
-   When using *unified* concretization (when possible), the entire set of specs will be
-   re-concretized after any addition of new user specs, to ensure that
-   the environment remains consistent / minimal. When instead unified concretization is
-   disabled, only the new specs will be concretized after any addition.
+   The ``spack concretize`` command without additional arguments will *not* change any
+   previously concretized specs. This may prevent it from finding a solution when using
+   ``unify: true``, and it may prevent it from finding a minimal solution when using
+   ``unify: when_possible``. You can force Spack to ignore the existing concrete environment
+   with ``spack concretize -f``.
 
 ^^^^^^^^^^^^^
 Spec Matrices
@@ -914,9 +916,9 @@ function, as shown in the example below:
 .. code-block:: yaml
 
    projections:
-     zlib: {name}-{version}
-     ^mpi: {name}-{version}/{^mpi.name}-{^mpi.version}-{compiler.name}-{compiler.version}
-     all: {name}-{version}/{compiler.name}-{compiler.version}
+     zlib: "{name}-{version}"
+     ^mpi: "{name}-{version}/{^mpi.name}-{^mpi.version}-{compiler.name}-{compiler.version}"
+     all: "{name}-{version}/{compiler.name}-{compiler.version}"
 
 The entries in the projections configuration file must all be either
 specs or the keyword ``all``. For each spec, the projection used will
@@ -1120,21 +1122,21 @@ index once every package is pushed. Note how this target uses the generated
 
    SPACK ?= spack
    BUILDCACHE_DIR = $(CURDIR)/tarballs
-   
+
    .PHONY: all
-   
+
    all: push
-   
+
    include env.mk
-   
+
    example/push/%: example/install/%
    	@mkdir -p $(dir $@)
    	$(info About to push $(SPEC) to a buildcache)
-   	$(SPACK) -e . buildcache create --allow-root --only=package --directory $(BUILDCACHE_DIR) /$(HASH)
+   	$(SPACK) -e . buildcache push --allow-root --only=package $(BUILDCACHE_DIR) /$(HASH)
    	@touch $@
-   
+
    push: $(addprefix example/push/,$(example/SPACK_PACKAGE_IDS))
    	$(info Updating the buildcache index)
-   	$(SPACK) -e . buildcache update-index --directory $(BUILDCACHE_DIR)
+   	$(SPACK) -e . buildcache update-index $(BUILDCACHE_DIR)
    	$(info Done!)
    	@touch $@

lib/spack/docs/getting_started.rst

@@ -21,7 +21,7 @@ be present on the machine where Spack is run:
    :header-rows: 1
 
 These requirements can be easily installed on most modern Linux systems;
-on macOS, the Command Line Tools package is required, and a full XCode suite 
+on macOS, the Command Line Tools package is required, and a full XCode suite
 may be necessary for some packages such as Qt and apple-gl. Spack is designed
 to run on HPC platforms like Cray.  Not all packages should be expected
 to work on all platforms.
@@ -41,12 +41,9 @@ A build matrix showing which packages are working on which systems is shown belo
 
       .. code-block:: console
 
-         yum update -y
-         yum install -y epel-release
-         yum update -y
-         yum --enablerepo epel groupinstall -y "Development Tools"
-         yum --enablerepo epel install -y curl findutils gcc-c++ gcc gcc-gfortran git gnupg2 hostname iproute redhat-lsb-core make patch python3 python3-pip python3-setuptools unzip
-         python3 -m pip install boto3
+         dnf install epel-release
+         dnf group install "Development Tools"
+         dnf install curl findutils gcc-gfortran gnupg2 hostname iproute redhat-lsb-core python3 python3-pip python3-setuptools unzip python3-boto3
 
    .. tab-item:: macOS Brew
 
@@ -320,7 +317,7 @@ installed, but you know that new compilers have been added to your
 
 .. code-block:: console
 
-   $ module load gcc-4.9.0
+   $ module load gcc/4.9.0
    $ spack compiler find
    ==> Added 1 new compiler to ~/.spack/linux/compilers.yaml
        gcc@4.9.0
@@ -368,7 +365,8 @@ Manual compiler configuration
 
 If auto-detection fails, you can manually configure a compiler by
 editing your ``~/.spack/<platform>/compilers.yaml`` file.  You can do this by running
-``spack config edit compilers``, which will open the file in your ``$EDITOR``.
+``spack config edit compilers``, which will open the file in
+:ref:`your favorite editor <controlling-the-editor>`.
 
 Each compiler configuration in the file looks like this:
 
@@ -1506,7 +1504,7 @@ Spack On Windows
 
 Windows support for Spack is currently under development. While this work is still in an early stage,
 it is currently possible to set up Spack and perform a few operations on Windows.  This section will guide
-you through the steps needed to install Spack and start running it on a fresh Windows machine. 
+you through the steps needed to install Spack and start running it on a fresh Windows machine.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Step 1: Install prerequisites
@@ -1516,7 +1514,7 @@ To use Spack on Windows, you will need the following packages:
 
 Required:
 * Microsoft Visual Studio
-* Python 
+* Python
 * Git
 
 Optional:
@@ -1547,8 +1545,8 @@ Intel Fortran
 """""""""""""
 
 For Fortran-based packages on Windows, we strongly recommend Intel's oneAPI Fortran compilers.
-The suite is free to download from Intel's website, located at 
-https://software.intel.com/content/www/us/en/develop/tools/oneapi/components/fortran-compiler.html#gs.70t5tw.
+The suite is free to download from Intel's website, located at
+https://software.intel.com/content/www/us/en/develop/tools/oneapi/components/fortran-compiler.html.
 The executable of choice for Spack will be Intel's Beta Compiler, ifx, which supports the classic
 compiler's (ifort's) frontend and runtime libraries by using LLVM.
 
@@ -1597,8 +1595,8 @@ in a Windows CMD prompt.
 
 .. note::
    If you chose to install Spack into a directory on Windows that is set up to require Administrative
-   Privleges, Spack will require elevated privleges to run.
-   Administrative Privleges can be denoted either by default such as
+   Privileges, Spack will require elevated privileges to run.
+   Administrative Privileges can be denoted either by default such as
    ``C:\Program Files``, or aministrator applied administrative restrictions
    on a directory that spack installs files to such as ``C:\Users``
 
@@ -1694,7 +1692,7 @@ Spack console via:
 
    spack install cpuinfo
 
-If in the previous step, you did not have CMake or Ninja installed, running the command above should boostrap both packages
+If in the previous step, you did not have CMake or Ninja installed, running the command above should bootstrap both packages
 
 """""""""""""""""""""""""""
 Windows Compatible Packages

lib/spack/docs/index.rst

@@ -76,6 +76,7 @@ or refer to the full manual below.
    chain
    extensions
    pipelines
+   signing
 
 .. toctree::
    :maxdepth: 2

lib/spack/docs/mirrors.rst

@@ -163,7 +163,7 @@ your site.
 Mirror environment
 ^^^^^^^^^^^^^^^^^^
 
-To create a mirror of all packages required by a concerte environment, activate the environment and call ``spack mirror create -a``.
+To create a mirror of all packages required by a concrete environment, activate the environment and call ``spack mirror create -a``.
 This is especially useful to create a mirror of an environment concretized on another machine.
 
 .. code-block:: console

lib/spack/docs/module_file_support.rst

@@ -13,7 +13,7 @@ The use of module systems to manage user environment in a controlled way
 is a common practice at HPC centers that is often embraced also by
 individual programmers on their development machines. To support this
 common practice Spack integrates with `Environment Modules
-<http://modules.sourceforge.net/>`_ and `LMod
+<http://modules.sourceforge.net/>`_ and `Lmod
 <http://lmod.readthedocs.io/en/latest/>`_ by providing post-install hooks
 that generate module files and commands to manipulate them.
 
@@ -26,8 +26,8 @@ Using module files via Spack
 ----------------------------
 
 If you have installed a supported module system you should be able to
-run either ``module avail`` or ``use -l spack`` to see what module
-files have been installed.  Here is sample output of those programs,
+run ``module avail`` to see what module
+files have been installed. Here is sample output of those programs,
 showing lots of installed packages:
 
 .. code-block:: console
@@ -35,32 +35,27 @@ showing lots of installed packages:
    $ module avail
 
    --------------------------------------------------------------- ~/spack/share/spack/modules/linux-ubuntu14-x86_64 ---------------------------------------------------------------
-   autoconf-2.69-gcc-4.8-qextxkq       hwloc-1.11.6-gcc-6.3.0-akcisez             m4-1.4.18-gcc-4.8-ev2znoc                   openblas-0.2.19-gcc-6.3.0-dhkmed6        py-setuptools-34.2.0-gcc-6.3.0-fadur4s
-   automake-1.15-gcc-4.8-maqvukj       isl-0.18-gcc-4.8-afi6taq                   m4-1.4.18-gcc-6.3.0-uppywnz                 openmpi-2.1.0-gcc-6.3.0-go2s4z5          py-six-1.10.0-gcc-6.3.0-p4dhkaw
-   binutils-2.28-gcc-4.8-5s7c6rs       libiconv-1.15-gcc-4.8-at46wg3              mawk-1.3.4-gcc-4.8-acjez57                  openssl-1.0.2k-gcc-4.8-dkls5tk           python-2.7.13-gcc-6.3.0-tyehea7
-   bison-3.0.4-gcc-4.8-ek4luo5         libpciaccess-0.13.4-gcc-6.3.0-gmufnvh      mawk-1.3.4-gcc-6.3.0-ostdoms                openssl-1.0.2k-gcc-6.3.0-gxgr5or         readline-7.0-gcc-4.8-xhufqhn
-   bzip2-1.0.6-gcc-4.8-iffrxzn         libsigsegv-2.11-gcc-4.8-pp2cvte            mpc-1.0.3-gcc-4.8-g5mztc5                   pcre-8.40-gcc-4.8-r5pbrxb                readline-7.0-gcc-6.3.0-zzcyicg
-   bzip2-1.0.6-gcc-6.3.0-bequudr       libsigsegv-2.11-gcc-6.3.0-7enifnh          mpfr-3.1.5-gcc-4.8-o7xm7az                  perl-5.24.1-gcc-4.8-dg5j65u              sqlite-3.8.5-gcc-6.3.0-6zoruzj
-   cmake-3.7.2-gcc-6.3.0-fowuuby       libtool-2.4.6-gcc-4.8-7a523za              mpich-3.2-gcc-6.3.0-dmvd3aw                 perl-5.24.1-gcc-6.3.0-6uzkpt6            tar-1.29-gcc-4.8-wse2ass
-   curl-7.53.1-gcc-4.8-3fz46n6         libtool-2.4.6-gcc-6.3.0-n7zmbzt            ncurses-6.0-gcc-4.8-dcpe7ia                 pkg-config-0.29.2-gcc-4.8-ib33t75        tcl-8.6.6-gcc-4.8-tfxzqbr
-   expat-2.2.0-gcc-4.8-mrv6bd4         libxml2-2.9.4-gcc-4.8-ryzxnsu              ncurses-6.0-gcc-6.3.0-ucbhcdy               pkg-config-0.29.2-gcc-6.3.0-jpgubk3      util-macros-1.19.1-gcc-6.3.0-xorz2x2
-   flex-2.6.3-gcc-4.8-yf345oo          libxml2-2.9.4-gcc-6.3.0-rltzsdh            netlib-lapack-3.6.1-gcc-6.3.0-js33dog       py-appdirs-1.4.0-gcc-6.3.0-jxawmw7       xz-5.2.3-gcc-4.8-mew4log
-   gcc-6.3.0-gcc-4.8-24puqve           lmod-7.4.1-gcc-4.8-je4srhr                 netlib-scalapack-2.0.2-gcc-6.3.0-5aidk4l    py-numpy-1.12.0-gcc-6.3.0-oemmoeu        xz-5.2.3-gcc-6.3.0-3vqeuvb
-   gettext-0.19.8.1-gcc-4.8-yymghlh    lua-5.3.4-gcc-4.8-im75yaz                  netlib-scalapack-2.0.2-gcc-6.3.0-hjsemcn    py-packaging-16.8-gcc-6.3.0-i2n3dtl      zip-3.0-gcc-4.8-rwar22d
-   gmp-6.1.2-gcc-4.8-5ub2wu5           lua-luafilesystem-1_6_3-gcc-4.8-wkey3nl    netlib-scalapack-2.0.2-gcc-6.3.0-jva724b    py-pyparsing-2.1.10-gcc-6.3.0-tbo6gmw    zlib-1.2.11-gcc-4.8-pgxsxv7
-   help2man-1.47.4-gcc-4.8-kcnqmau     lua-luaposix-33.4.0-gcc-4.8-mdod2ry        netlib-scalapack-2.0.2-gcc-6.3.0-rgqfr6d    py-scipy-0.19.0-gcc-6.3.0-kr7nat4        zlib-1.2.11-gcc-6.3.0-7cqp6cj
+   autoconf/2.69-gcc-4.8-qextxkq       hwloc/1.11.6-gcc-6.3.0-akcisez             m4/1.4.18-gcc-4.8-ev2znoc                   openblas/0.2.19-gcc-6.3.0-dhkmed6        py-setuptools/34.2.0-gcc-6.3.0-fadur4s
+   automake/1.15-gcc-4.8-maqvukj       isl/0.18-gcc-4.8-afi6taq                   m4/1.4.18-gcc-6.3.0-uppywnz                 openmpi/2.1.0-gcc-6.3.0-go2s4z5          py-six/1.10.0-gcc-6.3.0-p4dhkaw
+   binutils/2.28-gcc-4.8-5s7c6rs       libiconv/1.15-gcc-4.8-at46wg3              mawk/1.3.4-gcc-4.8-acjez57                  openssl/1.0.2k-gcc-4.8-dkls5tk           python/2.7.13-gcc-6.3.0-tyehea7
+   bison/3.0.4-gcc-4.8-ek4luo5         libpciaccess/0.13.4-gcc-6.3.0-gmufnvh      mawk/1.3.4-gcc-6.3.0-ostdoms                openssl/1.0.2k-gcc-6.3.0-gxgr5or         readline/7.0-gcc-4.8-xhufqhn
+   bzip2/1.0.6-gcc-4.8-iffrxzn         libsigsegv/2.11-gcc-4.8-pp2cvte            mpc/1.0.3-gcc-4.8-g5mztc5                   pcre/8.40-gcc-4.8-r5pbrxb                readline/7.0-gcc-6.3.0-zzcyicg
+   bzip2/1.0.6-gcc-6.3.0-bequudr       libsigsegv/2.11-gcc-6.3.0-7enifnh          mpfr/3.1.5-gcc-4.8-o7xm7az                  perl/5.24.1-gcc-4.8-dg5j65u              sqlite/3.8.5-gcc-6.3.0-6zoruzj
+   cmake/3.7.2-gcc-6.3.0-fowuuby       libtool/2.4.6-gcc-4.8-7a523za              mpich/3.2-gcc-6.3.0-dmvd3aw                 perl/5.24.1-gcc-6.3.0-6uzkpt6            tar/1.29-gcc-4.8-wse2ass
+   curl/7.53.1-gcc-4.8-3fz46n6         libtool/2.4.6-gcc-6.3.0-n7zmbzt            ncurses/6.0-gcc-4.8-dcpe7ia                 pkg-config/0.29.2-gcc-4.8-ib33t75        tcl/8.6.6-gcc-4.8-tfxzqbr
+   expat/2.2.0-gcc-4.8-mrv6bd4         libxml2/2.9.4-gcc-4.8-ryzxnsu              ncurses/6.0-gcc-6.3.0-ucbhcdy               pkg-config/0.29.2-gcc-6.3.0-jpgubk3      util-macros/1.19.1-gcc-6.3.0-xorz2x2
+   flex/2.6.3-gcc-4.8-yf345oo          libxml2/2.9.4-gcc-6.3.0-rltzsdh            netlib-lapack/3.6.1-gcc-6.3.0-js33dog       py-appdirs/1.4.0-gcc-6.3.0-jxawmw7       xz/5.2.3-gcc-4.8-mew4log
+   gcc/6.3.0-gcc-4.8-24puqve           lmod/7.4.1-gcc-4.8-je4srhr                 netlib-scalapack/2.0.2-gcc-6.3.0-5aidk4l    py-numpy/1.12.0-gcc-6.3.0-oemmoeu        xz/5.2.3-gcc-6.3.0-3vqeuvb
+   gettext/0.19.8.1-gcc-4.8-yymghlh    lua/5.3.4-gcc-4.8-im75yaz                  netlib-scalapack/2.0.2-gcc-6.3.0-hjsemcn    py-packaging/16.8-gcc-6.3.0-i2n3dtl      zip/3.0-gcc-4.8-rwar22d
+   gmp/6.1.2-gcc-4.8-5ub2wu5           lua-luafilesystem/1_6_3-gcc-4.8-wkey3nl    netlib-scalapack/2.0.2-gcc-6.3.0-jva724b    py-pyparsing/2.1.10-gcc-6.3.0-tbo6gmw    zlib/1.2.11-gcc-4.8-pgxsxv7
+   help2man/1.47.4-gcc-4.8-kcnqmau     lua-luaposix/33.4.0-gcc-4.8-mdod2ry        netlib-scalapack/2.0.2-gcc-6.3.0-rgqfr6d    py-scipy/0.19.0-gcc-6.3.0-kr7nat4        zlib/1.2.11-gcc-6.3.0-7cqp6cj
 
 The names should look familiar, as they resemble the output from ``spack find``.
-You *can* use the modules here directly.  For example, you could type either of these commands
-to load the ``cmake`` module:
+For example, you could type the following command to load the ``cmake`` module:
 
 .. code-block:: console
 
-   $ use cmake-3.7.2-gcc-6.3.0-fowuuby
-
-.. code-block:: console
-
-   $ module load cmake-3.7.2-gcc-6.3.0-fowuuby
+   $ module load cmake/3.7.2-gcc-6.3.0-fowuuby
 
 Neither of these is particularly pretty, easy to remember, or easy to
 type. Luckily, Spack offers many facilities for customizing the module
@@ -93,9 +88,9 @@ the different file formats that can be generated by Spack:
   +-----------------------------+--------------------+-------------------------------+----------------------------------------------+----------------------+
   |                             | **Hook name**      |  **Default root directory**   | **Default template file**                    | **Compatible tools** |
   +=============================+====================+===============================+==============================================+======================+
-  |  **TCL - Non-Hierarchical** | ``tcl``            |  share/spack/modules          | share/spack/templates/modules/modulefile.tcl | Env. Modules/LMod    |
+  |  **Tcl - Non-Hierarchical** | ``tcl``            |  share/spack/modules          | share/spack/templates/modules/modulefile.tcl | Env. Modules/Lmod    |
   +-----------------------------+--------------------+-------------------------------+----------------------------------------------+----------------------+
-  |  **Lua - Hierarchical**     | ``lmod``           |  share/spack/lmod             | share/spack/templates/modules/modulefile.lua | LMod                 |
+  |  **Lua - Hierarchical**     | ``lmod``           |  share/spack/lmod             | share/spack/templates/modules/modulefile.lua | Lmod                 |
   +-----------------------------+--------------------+-------------------------------+----------------------------------------------+----------------------+
 
 
@@ -280,10 +275,12 @@ of the installed software. For instance, in the snippet below:
              set:
                BAR: 'bar'
          # This anonymous spec selects any package that
-         # depends on openmpi. The double colon at the
+         # depends on mpi. The double colon at the
          # end clears the set of rules that matched so far.
-         ^openmpi::
+         ^mpi::
            environment:
+             prepend_path:
+               PATH: '{^mpi.prefix}/bin'
              set:
                BAR: 'baz'
          # Selects any zlib package
@@ -298,7 +295,9 @@ of the installed software. For instance, in the snippet below:
              - FOOBAR
 
 you are instructing Spack to set the environment variable ``BAR=bar`` for every module,
-unless the associated spec satisfies ``^openmpi`` in which case ``BAR=baz``.
+unless the associated spec satisfies the abstract dependency ``^mpi`` in which case
+``BAR=baz``, and the directory containing the respective MPI executables is prepended
+to the ``PATH`` variable.
 In addition in any spec that satisfies ``zlib`` the value ``foo`` will be
 prepended to ``LD_LIBRARY_PATH`` and in any spec that satisfies ``zlib%gcc@4.8``
 the variable ``FOOBAR`` will be unset.
@@ -396,39 +395,41 @@ name and version for all packages that depend on mpi.
 
 When specifying module names by projection for Lmod modules, we
 recommend NOT including names of dependencies (e.g., MPI, compilers)
-that are already in the LMod hierarchy.
+that are already in the Lmod hierarchy.
 
 
 
 .. note::
-   TCL modules
-     TCL modules also allow for explicit conflicts between modulefiles.
+   Tcl and Lua modules also allow for explicit conflicts between modulefiles.
 
-     .. code-block:: yaml
+   .. code-block:: yaml
 
-        modules:
-          default:
-            enable:
-              - tcl
-            tcl:
-              projections:
-                all: '{name}/{version}-{compiler.name}-{compiler.version}'
-              all:
-                conflict:
-                  - '{name}'
-                  - 'intel/14.0.1'
+      modules:
+        default:
+          enable:
+            - tcl
+          tcl:
+            projections:
+              all: '{name}/{version}-{compiler.name}-{compiler.version}'
+            all:
+              conflict:
+                - '{name}'
+                - 'intel/14.0.1'
 
-     will create module files that will conflict with ``intel/14.0.1`` and with the
-     base directory of the same module, effectively preventing the possibility to
-     load two or more versions of the same software at the same time. The tokens
-     that are available for use in this directive are the same understood by
-     the :meth:`~spack.spec.Spec.format` method.
+   will create module files that will conflict with ``intel/14.0.1`` and with the
+   base directory of the same module, effectively preventing the possibility to
+   load two or more versions of the same software at the same time. The tokens
+   that are available for use in this directive are the same understood by the
+   :meth:`~spack.spec.Spec.format` method.
+
+   For Lmod and Environment Modules versions prior 4.2, it is important to
+   express the conflict on both modulefiles conflicting with each other.
 
 
 .. note::
-   LMod hierarchical module files
+   Lmod hierarchical module files
      When ``lmod`` is activated Spack will generate a set of hierarchical lua module
-     files that are understood by LMod. The hierarchy will always contain the
+     files that are understood by Lmod. The hierarchy will always contain the
      two layers ``Core`` / ``Compiler`` but can be further extended to
      any of the virtual dependencies present in Spack. A case that could be useful in
      practice is for instance:
@@ -450,7 +451,7 @@ that are already in the LMod hierarchy.
 
      that will generate a hierarchy in which the ``lapack`` and ``mpi`` layer can be switched
      independently. This allows a site to build the same libraries or applications against different
-     implementations of ``mpi`` and ``lapack``, and let LMod switch safely from one to the
+     implementations of ``mpi`` and ``lapack``, and let Lmod switch safely from one to the
      other.
 
      All packages built with a compiler in ``core_compilers`` and all
@@ -460,12 +461,12 @@ that are already in the LMod hierarchy.
 .. warning::
   Consistency of Core packages
    The user is responsible for maintining consistency among core packages, as ``core_specs``
-   bypasses the hierarchy that allows LMod to safely switch between coherent software stacks.
+   bypasses the hierarchy that allows Lmod to safely switch between coherent software stacks.
 
 .. warning::
   Deep hierarchies and ``lmod spider``
    For hierarchies that are deeper than three layers ``lmod spider`` may have some issues.
-   See `this discussion on the LMod project <https://github.com/TACC/Lmod/issues/114>`_.
+   See `this discussion on the Lmod project <https://github.com/TACC/Lmod/issues/114>`_.
 
 """"""""""""""""""""""
 Select default modules
@@ -534,7 +535,7 @@ installed to ``/spack/prefix/foo``, if ``foo`` installs executables to
 update ``MANPATH``.
 
 The default list of environment variables in this config section
-inludes ``PATH``, ``MANPATH``, ``ACLOCAL_PATH``, ``PKG_CONFIG_PATH``
+includes ``PATH``, ``MANPATH``, ``ACLOCAL_PATH``, ``PKG_CONFIG_PATH``
 and ``CMAKE_PREFIX_PATH``, as well as ``DYLD_FALLBACK_LIBRARY_PATH``
 on macOS. On Linux however, the corresponding ``LD_LIBRARY_PATH``
 variable is *not* set, because it affects the behavior of
@@ -634,8 +635,9 @@ by its dependency; when the dependency is autoloaded, the executable will be in
 PATH. Similarly for scripting languages such as Python, packages and their dependencies
 have to be loaded together.
 
-Autoloading is enabled by default for LMod, as it has great builtin support for through
-the ``depends_on`` function. For Environment Modules it is disabled by default.
+Autoloading is enabled by default for Lmod and Environment Modules. The former
+has builtin support for through the ``depends_on`` function. The latter uses
+``module load`` statement to load and track dependencies.
 
 Autoloading can also be enabled conditionally:
 
@@ -655,12 +657,14 @@ The allowed values for the ``autoload`` statement are either ``none``,
 ``direct`` or ``all``.
 
 .. note::
-  TCL prerequisites
+  Tcl prerequisites
      In the ``tcl`` section of the configuration file it is possible to use
      the ``prerequisites`` directive that accepts the same values as
      ``autoload``. It will produce module files that have a ``prereq``
-     statement, which can be used to autoload dependencies in some versions
-     of Environment Modules.
+     statement, which autoloads dependencies on Environment Modules when its
+     ``auto_handling`` configuration option is enabled. If Environment Modules
+     is installed with Spack, ``auto_handling`` is enabled by default starting
+     version 4.2. Otherwise it is enabled by default since version 5.0.
 
 ------------------------
 Maintaining Module Files
@@ -781,35 +785,35 @@ cut-and-pasted into a shell script.  For example:
 
     $ spack module tcl loads --dependencies py-numpy git
     # bzip2@1.0.6%gcc@4.9.3=linux-x86_64
-    module load bzip2-1.0.6-gcc-4.9.3-ktnrhkrmbbtlvnagfatrarzjojmkvzsx
+    module load bzip2/1.0.6-gcc-4.9.3-ktnrhkrmbbtlvnagfatrarzjojmkvzsx
     # ncurses@6.0%gcc@4.9.3=linux-x86_64
-    module load ncurses-6.0-gcc-4.9.3-kaazyneh3bjkfnalunchyqtygoe2mncv
+    module load ncurses/6.0-gcc-4.9.3-kaazyneh3bjkfnalunchyqtygoe2mncv
     # zlib@1.2.8%gcc@4.9.3=linux-x86_64
-    module load zlib-1.2.8-gcc-4.9.3-v3ufwaahjnviyvgjcelo36nywx2ufj7z
+    module load zlib/1.2.8-gcc-4.9.3-v3ufwaahjnviyvgjcelo36nywx2ufj7z
     # sqlite@3.8.5%gcc@4.9.3=linux-x86_64
-    module load sqlite-3.8.5-gcc-4.9.3-a3eediswgd5f3rmto7g3szoew5nhehbr
+    module load sqlite/3.8.5-gcc-4.9.3-a3eediswgd5f3rmto7g3szoew5nhehbr
     # readline@6.3%gcc@4.9.3=linux-x86_64
-    module load readline-6.3-gcc-4.9.3-se6r3lsycrwxyhreg4lqirp6xixxejh3
+    module load readline/6.3-gcc-4.9.3-se6r3lsycrwxyhreg4lqirp6xixxejh3
     # python@3.5.1%gcc@4.9.3=linux-x86_64
-    module load python-3.5.1-gcc-4.9.3-5q5rsrtjld4u6jiicuvtnx52m7tfhegi
+    module load python/3.5.1-gcc-4.9.3-5q5rsrtjld4u6jiicuvtnx52m7tfhegi
     # py-setuptools@20.5%gcc@4.9.3=linux-x86_64
-    module load py-setuptools-20.5-gcc-4.9.3-4qr2suj6p6glepnedmwhl4f62x64wxw2
+    module load py-setuptools/20.5-gcc-4.9.3-4qr2suj6p6glepnedmwhl4f62x64wxw2
     # py-nose@1.3.7%gcc@4.9.3=linux-x86_64
-    module load py-nose-1.3.7-gcc-4.9.3-pwhtjw2dvdvfzjwuuztkzr7b4l6zepli
+    module load py-nose/1.3.7-gcc-4.9.3-pwhtjw2dvdvfzjwuuztkzr7b4l6zepli
     # openblas@0.2.17%gcc@4.9.3+shared=linux-x86_64
-    module load openblas-0.2.17-gcc-4.9.3-pw6rmlom7apfsnjtzfttyayzc7nx5e7y
+    module load openblas/0.2.17-gcc-4.9.3-pw6rmlom7apfsnjtzfttyayzc7nx5e7y
     # py-numpy@1.11.0%gcc@4.9.3+blas+lapack=linux-x86_64
-    module load py-numpy-1.11.0-gcc-4.9.3-mulodttw5pcyjufva4htsktwty4qd52r
+    module load py-numpy/1.11.0-gcc-4.9.3-mulodttw5pcyjufva4htsktwty4qd52r
     # curl@7.47.1%gcc@4.9.3=linux-x86_64
-    module load curl-7.47.1-gcc-4.9.3-ohz3fwsepm3b462p5lnaquv7op7naqbi
+    module load curl/7.47.1-gcc-4.9.3-ohz3fwsepm3b462p5lnaquv7op7naqbi
     # autoconf@2.69%gcc@4.9.3=linux-x86_64
-    module load autoconf-2.69-gcc-4.9.3-bkibjqhgqm5e3o423ogfv2y3o6h2uoq4
+    module load autoconf/2.69-gcc-4.9.3-bkibjqhgqm5e3o423ogfv2y3o6h2uoq4
     # cmake@3.5.0%gcc@4.9.3~doc+ncurses+openssl~qt=linux-x86_64
-    module load cmake-3.5.0-gcc-4.9.3-x7xnsklmgwla3ubfgzppamtbqk5rwn7t
+    module load cmake/3.5.0-gcc-4.9.3-x7xnsklmgwla3ubfgzppamtbqk5rwn7t
     # expat@2.1.0%gcc@4.9.3=linux-x86_64
-    module load expat-2.1.0-gcc-4.9.3-6pkz2ucnk2e62imwakejjvbv6egncppd
+    module load expat/2.1.0-gcc-4.9.3-6pkz2ucnk2e62imwakejjvbv6egncppd
     # git@2.8.0-rc2%gcc@4.9.3+curl+expat=linux-x86_64
-    module load git-2.8.0-rc2-gcc-4.9.3-3bib4hqtnv5xjjoq5ugt3inblt4xrgkd
+    module load git/2.8.0-rc2-gcc-4.9.3-3bib4hqtnv5xjjoq5ugt3inblt4xrgkd
 
 The script may be further edited by removing unnecessary modules.
 
@@ -828,12 +832,12 @@ For example, consider the following on one system:
 .. code-block:: console
 
     $ module avail
-    linux-SuSE11-x86_64/antlr-2.7.7-gcc-5.3.0-bdpl46y
+    linux-SuSE11-x86_64/antlr/2.7.7-gcc-5.3.0-bdpl46y
 
     $ spack module tcl loads antlr    # WRONG!
     # antlr@2.7.7%gcc@5.3.0~csharp+cxx~java~python arch=linux-SuSE11-x86_64
-    module load antlr-2.7.7-gcc-5.3.0-bdpl46y
+    module load antlr/2.7.7-gcc-5.3.0-bdpl46y
 
     $ spack module tcl loads --prefix linux-SuSE11-x86_64/ antlr
     # antlr@2.7.7%gcc@5.3.0~csharp+cxx~java~python arch=linux-SuSE11-x86_64
-    module load linux-SuSE11-x86_64/antlr-2.7.7-gcc-5.3.0-bdpl46y
+    module load linux-SuSE11-x86_64/antlr/2.7.7-gcc-5.3.0-bdpl46y

lib/spack/docs/pipelines.rst

@@ -9,27 +9,32 @@
 CI Pipelines
 ============
 
-Spack provides commands that support generating and running automated build
-pipelines designed for Gitlab CI.  At the highest level it works like this:
-provide a spack environment describing the set of packages you care about,
-and include within that environment file a description of how those packages
-should be mapped to Gitlab runners.  Spack can then generate a ``.gitlab-ci.yml``
-file containing job descriptions for all your packages that can be run by a
-properly configured Gitlab CI instance.  When run, the generated pipeline will
-build and deploy binaries, and it can optionally report to a CDash instance
+Spack provides commands that support generating and running automated build pipelines in CI instances.  At the highest
+level it works like this: provide a spack environment describing the set of packages you care about, and include a
+description of how those packages should be mapped to Gitlab runners.  Spack can then generate a ``.gitlab-ci.yml``
+file containing job descriptions for all your packages that can be run by a properly configured CI instance.  When
+run, the generated pipeline will build and deploy binaries, and it can optionally report to a CDash instance
 regarding the health of the builds as they evolve over time.
 
 ------------------------------
 Getting started with pipelines
 ------------------------------
 
-It is fairly straightforward to get started with automated build pipelines.  At
-a minimum, you'll need to set up a Gitlab instance (more about Gitlab CI
-`here <https://about.gitlab.com/product/continuous-integration/>`_) and configure
-at least one `runner <https://docs.gitlab.com/runner/>`_.  Then the basic steps
-for setting up a build pipeline are as follows:
+To get started with automated build pipelines a Gitlab instance with version ``>= 12.9``
+(more about Gitlab CI `here <https://about.gitlab.com/product/continuous-integration/>`_)
+with at least one `runner <https://docs.gitlab.com/runner/>`_ configured is required. This
+can be done quickly by setting up a local Gitlab instance.
 
-#. Create a repository on your gitlab instance
+It is possible to set up pipelines on gitlab.com, but the builds there are limited to
+60 minutes and generic hardware.  It is possible to
+`hook up <https://about.gitlab.com/blog/2018/04/24/getting-started-gitlab-ci-gcp>`_
+Gitlab to Google Kubernetes Engine (`GKE <https://cloud.google.com/kubernetes-engine/>`_)
+or Amazon Elastic Kubernetes Service (`EKS <https://aws.amazon.com/eks>`_), though those
+topics are outside the scope of this document.
+
+After setting up a Gitlab instance for running CI, the basic steps for setting up a build pipeline are as follows:
+
+#. Create a repository in the Gitlab instance with CI and a runner enabled.
 #. Add a ``spack.yaml`` at the root containing your pipeline environment
 #. Add a ``.gitlab-ci.yml`` at the root containing two jobs (one to generate
    the pipeline dynamically, and one to run the generated jobs).
@@ -40,13 +45,6 @@ See the :ref:`functional_example` section for a minimal working example.  See al
 the :ref:`custom_Workflow` section for a link to an example of a custom workflow
 based on spack pipelines.
 
-While it is possible to set up pipelines on gitlab.com, as illustrated above, the
-builds there are limited to 60 minutes and generic hardware.  It is also possible to
-`hook up <https://about.gitlab.com/blog/2018/04/24/getting-started-gitlab-ci-gcp>`_
-Gitlab to Google Kubernetes Engine (`GKE <https://cloud.google.com/kubernetes-engine/>`_)
-or Amazon Elastic Kubernetes Service (`EKS <https://aws.amazon.com/eks>`_), though those
-topics are outside the scope of this document.
-
 Spack's pipelines are now making use of the
 `trigger <https://docs.gitlab.com/ee/ci/yaml/#trigger>`_ syntax to run
 dynamically generated
@@ -132,29 +130,35 @@ And here's the spack environment built by the pipeline represented as a
 
      mirrors: { "mirror": "s3://spack-public/mirror" }
 
-     gitlab-ci:
-       before_script:
-         - git clone ${SPACK_REPO}
-         - pushd spack && git checkout ${SPACK_CHECKOUT_VERSION} && popd
-         - . "./spack/share/spack/setup-env.sh"
-       script:
-         - pushd ${SPACK_CONCRETE_ENV_DIR} && spack env activate --without-view . && popd
-         - spack -d ci rebuild
-       mappings:
-         - match: ["os=ubuntu18.04"]
-           runner-attributes:
-             image:
-               name: ghcr.io/scottwittenburg/ecpe4s-ubuntu18.04-runner-x86_64:2020-09-01
-               entrypoint: [""]
-             tags:
-               - docker
+     ci:
        enable-artifacts-buildcache: True
        rebuild-index: False
+       pipeline-gen:
+       - any-job:
+           before_script:
+             - git clone ${SPACK_REPO}
+             - pushd spack && git checkout ${SPACK_CHECKOUT_VERSION} && popd
+             - . "./spack/share/spack/setup-env.sh"
+       - build-job:
+           tags: [docker]
+           image:
+             name: ghcr.io/scottwittenburg/ecpe4s-ubuntu18.04-runner-x86_64:2020-09-01
+             entrypoint: [""]
+
 
 The elements of this file important to spack ci pipelines are described in more
 detail below, but there are a couple of things to note about the above working
 example:
 
+.. note::
+   There is no ``script`` attribute specified for here. The reason for this is
+   Spack CI will automatically generate reasonable default scripts. More
+   detail on what is in these scripts can be found below.
+
+   Also notice the ``before_script`` section. It is required when using any of the
+   default scripts to source the ``setup-env.sh`` script in order to inform
+   the default scripts where to find the ``spack`` executable.
+
 Normally ``enable-artifacts-buildcache`` is not recommended in production as it
 results in large binary artifacts getting transferred back and forth between
 gitlab and the runners.  But in this example on gitlab.com where there is no
@@ -174,7 +178,7 @@ during subsequent pipeline runs.
    With the addition of reproducible builds (#22887) a previously working
    pipeline will require some changes:
 
-   * In the build jobs (``runner-attributes``), the environment location changed.
+   * In the build-jobs, the environment location changed.
      This will typically show as a ``KeyError`` in the failing job. Be sure to
      point to ``${SPACK_CONCRETE_ENV_DIR}``.
 
@@ -196,9 +200,9 @@ ci pipelines.  These commands are covered in more detail in this section.
 
 .. _cmd-spack-ci:
 
-^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^
 ``spack ci``
-^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^
 
 Super-command for functionality related to generating pipelines and executing
 pipeline jobs.
@@ -227,7 +231,7 @@ Using ``--prune-dag`` or ``--no-prune-dag`` configures whether or not jobs are
 generated for specs that are already up to date on the mirror.   If enabling
 DAG pruning using ``--prune-dag``, more information may be required in your
 ``spack.yaml`` file, see the :ref:`noop_jobs` section below regarding
-``service-job-attributes``.
+``noop-job``.
 
 The optional ``--check-index-only`` argument can be used to speed up pipeline
 generation by telling spack to consider only remote buildcache indices when
@@ -263,11 +267,11 @@ generated by jobs in the pipeline.
 
 .. _cmd-spack-ci-rebuild:
 
-^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^
 ``spack ci rebuild``
-^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^
 
-The purpose of ``spack ci rebuild`` is straightforward: take its assigned
+The purpose of ``spack ci rebuild`` is to take an assigned
 spec and ensure a binary of a successful build exists on the target mirror.
 If the binary does not already exist, it is built from source and pushed
 to the mirror. The associated stand-alone tests are optionally run against
@@ -280,7 +284,7 @@ directory. The script is run in a job to install the spec from source. The
 resulting binary package is pushed to the mirror. If ``cdash`` is configured
 for the environment, then the build results will be uploaded to the site.
 
-Environment variables and values in the ``gitlab-ci`` section of the
+Environment variables and values in the ``ci::pipeline-gen`` section of the
 ``spack.yaml`` environment file provide inputs to this process. The
 two main sources of environment variables are variables written into
 ``.gitlab-ci.yml`` by ``spack ci generate`` and the GitLab CI runtime.
@@ -298,21 +302,23 @@ A snippet from an example ``spack.yaml`` file illustrating use of this
 option *and* specification of a package with broken tests is given below.
 The inclusion of a spec for building ``gptune`` is not shown here. Note
 that ``--tests`` is passed to ``spack ci rebuild`` as part of the
-``gitlab-ci`` script.
+``build-job`` script.
 
 .. code-block:: yaml
 
-  gitlab-ci:
-    script:
-      - . "./share/spack/setup-env.sh"
-      - spack --version
-      - cd ${SPACK_CONCRETE_ENV_DIR}
-      - spack env activate --without-view .
-      - spack config add "config:install_tree:projections:${SPACK_JOB_SPEC_PKG_NAME}:'morepadding/{architecture}/{compiler.name}-{compiler.version}/{name}-{version}-{hash}'"
-       - mkdir -p ${SPACK_ARTIFACTS_ROOT}/user_data
-       - if [[ -r /mnt/key/intermediate_ci_signing_key.gpg ]]; then spack gpg trust /mnt/key/intermediate_ci_signing_key.gpg; fi
-       - if [[ -r /mnt/key/spack_public_key.gpg ]]; then spack gpg trust /mnt/key/spack_public_key.gpg; fi
-       - spack -d ci rebuild --tests > >(tee ${SPACK_ARTIFACTS_ROOT}/user_data/pipeline_out.txt) 2> >(tee ${SPACK_ARTIFACTS_ROOT}/user_data/pipeline_err.txt >&2)
+  ci:
+    pipeline-gen:
+    - build-job
+        script:
+          - . "./share/spack/setup-env.sh"
+          - spack --version
+          - cd ${SPACK_CONCRETE_ENV_DIR}
+          - spack env activate --without-view .
+          - spack config add "config:install_tree:projections:${SPACK_JOB_SPEC_PKG_NAME}:'morepadding/{architecture}/{compiler.name}-{compiler.version}/{name}-{version}-{hash}'"
+           - mkdir -p ${SPACK_ARTIFACTS_ROOT}/user_data
+           - if [[ -r /mnt/key/intermediate_ci_signing_key.gpg ]]; then spack gpg trust /mnt/key/intermediate_ci_signing_key.gpg; fi
+           - if [[ -r /mnt/key/spack_public_key.gpg ]]; then spack gpg trust /mnt/key/spack_public_key.gpg; fi
+           - spack -d ci rebuild --tests > >(tee ${SPACK_ARTIFACTS_ROOT}/user_data/pipeline_out.txt) 2> >(tee ${SPACK_ARTIFACTS_ROOT}/user_data/pipeline_err.txt >&2)
 
      broken-tests-packages:
        - gptune
@@ -354,113 +360,31 @@ arguments you can pass to ``spack ci reproduce-build`` in order to reproduce
 a particular build locally.
 
 ------------------------------------
-A pipeline-enabled spack environment
+Job Types
 ------------------------------------
 
-Here's an example of a spack environment file that has been enhanced with
-sections describing a build pipeline:
+^^^^^^^^^^^^^^^
+Rebuild (build)
+^^^^^^^^^^^^^^^
 
-.. code-block:: yaml
+Rebuild jobs, denoted as ``build-job``'s in the ``pipeline-gen`` list, are jobs
+associated with concrete specs that have been marked for rebuild. By default a simple
+script for doing rebuild is generated, but may be modified as needed.
 
-   spack:
-     definitions:
-     - pkgs:
-       - readline@7.0
-     - compilers:
-       - '%gcc@5.5.0'
-     - oses:
-       - os=ubuntu18.04
-       - os=centos7
-     specs:
-     - matrix:
-       - [$pkgs]
-       - [$compilers]
-       - [$oses]
-     mirrors:
-       cloud_gitlab: https://mirror.spack.io
-     gitlab-ci:
-       mappings:
-         - match:
-             - os=ubuntu18.04
-           runner-attributes:
-             tags:
-               - spack-kube
-             image: spack/ubuntu-bionic
-         - match:
-             - os=centos7
-           runner-attributes:
-             tags:
-               - spack-kube
-             image: spack/centos7
-     cdash:
-       build-group: Release Testing
-       url: https://cdash.spack.io
-       project: Spack
-       site: Spack AWS Gitlab Instance
+The default script does three main steps, change directories to the pipelines concrete
+environment, activate the concrete environment, and run the ``spack ci rebuild`` command:
 
-Hopefully, the ``definitions``, ``specs``, ``mirrors``, etc. sections are already
-familiar, as they are part of spack :ref:`environments`.  So let's take a more
-in-depth look some of the pipeline-related sections in that environment file
-that might not be as familiar.
+.. code-block:: bash
 
-The ``gitlab-ci`` section is used to configure how the pipeline workload should be
-generated, mainly how the jobs for building specs should be assigned to the
-configured runners on your instance.  Each entry within the list of ``mappings``
-corresponds to a known gitlab runner, where the ``match`` section is used
-in assigning a release spec to one of the runners, and the ``runner-attributes``
-section is used to configure the spec/job for that particular runner.
-
-Both the top-level ``gitlab-ci`` section as well as each ``runner-attributes``
-section can also contain the following keys: ``image``, ``tags``, ``variables``,
-``before_script``, ``script``, and ``after_script``.  If any of these keys are
-provided at the ``gitlab-ci`` level, they will be used as the defaults for any
-``runner-attributes``, unless they are overridden in those sections.  Specifying
-any of these keys at the ``runner-attributes`` level generally overrides the
-keys specified at the higher level, with a couple exceptions.  Any ``variables``
-specified at both levels result in those dictionaries getting merged in the
-resulting generated job, and any duplicate variable names get assigned the value
-provided in the specific ``runner-attributes``.  If ``tags`` are specified both
-at the ``gitlab-ci`` level as well as the ``runner-attributes`` level, then the
-lists of tags are combined, and any duplicates are removed.
-
-See the section below on using a custom spack for an example of how these keys
-could be used.
-
-There are other pipeline options you can configure within the ``gitlab-ci`` section
-as well.
-
-The ``bootstrap`` section allows you to specify lists of specs from
-your ``definitions`` that should be staged ahead of the environment's ``specs`` (this
-section is described in more detail below).  The ``enable-artifacts-buildcache`` key
-takes a boolean and determines whether the pipeline uses artifacts to store and
-pass along the buildcaches from one stage to the next (the default if you don't
-provide this option is ``False``).
-
-The optional ``broken-specs-url`` key tells Spack to check against a list of
-specs that are known to be currently broken in ``develop``. If any such specs
-are found, the ``spack ci generate`` command will fail with an error message
-informing the user what broken specs were encountered. This allows the pipeline
-to fail early and avoid wasting compute resources attempting to build packages
-that will not succeed.
-
-The optional ``cdash`` section provides information that will be used by the
-``spack ci generate`` command (invoked by ``spack ci start``) for reporting
-to CDash.  All the jobs generated from this environment will belong to a
-"build group" within CDash that can be tracked over time.  As the release
-progresses, this build group may have jobs added or removed. The url, project,
-and site are used to specify the CDash instance to which build results should
-be reported.
-
-Take a look at the
-`schema <https://github.com/spack/spack/blob/develop/lib/spack/spack/schema/gitlab_ci.py>`_
-for the gitlab-ci section of the spack environment file, to see precisely what
-syntax is allowed there.
+  cd ${concrete_environment_dir}
+  spack env activate --without-view .
+  spack ci rebuild
 
 .. _rebuild_index:
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Note about rebuilding buildcache index
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^
+Update Index (reindex)
+^^^^^^^^^^^^^^^^^^^^^^
 
 By default, while a pipeline job may rebuild a package, create a buildcache
 entry, and push it to the mirror, it does not automatically re-generate the
@@ -475,21 +399,44 @@ not correctly reflect the mirror's contents at the end of a pipeline.
 To make sure the buildcache index is up to date at the end of your pipeline,
 spack generates a job to update the buildcache index of the target mirror
 at the end of each pipeline by default.  You can disable this behavior by
-adding ``rebuild-index: False`` inside the ``gitlab-ci`` section of your
-spack environment.  Spack will assign the job any runner attributes found
-on the ``service-job-attributes``, if you have provided that in your
-``spack.yaml``.
+adding ``rebuild-index: False`` inside the ``ci`` section of your
+spack environment.
+
+Reindex jobs do not allow modifying the ``script`` attribute since it is automatically
+generated using the target mirror listed in the ``mirrors::mirror`` configuration.
+
+^^^^^^^^^^^^^^^^^
+Signing (signing)
+^^^^^^^^^^^^^^^^^
+
+This job is run after all of the rebuild jobs are completed and is intended to be used
+to sign the package binaries built by a protected CI run. Signing jobs are generated
+only if a signing job ``script`` is specified and the spack CI job type is protected.
+Note, if an ``any-job`` section contains a script, this will not implicitly create a
+``signing`` job, a signing job may only exist if it is explicitly specified in the
+configuration with a ``script`` attribute. Specifying a signing job without a script
+does not create a signing job and the job configuration attributes will be ignored.
+Signing jobs are always assigned the runner tags ``aws``, ``protected``, and ``notary``.
+
+^^^^^^^^^^^^^^^^^
+Cleanup (cleanup)
+^^^^^^^^^^^^^^^^^
+
+When using ``temporary-storage-url-prefix`` the cleanup job will destroy the mirror
+created for the associated Gitlab pipeline. Cleanup jobs do not allow modifying the
+script, but do expect that the spack command is in the path and require a
+``before_script`` to be specified that sources the ``setup-env.sh`` script.
 
 .. _noop_jobs:
 
-^^^^^^^^^^^^^^^^^^^^^^^
-Note about "no-op" jobs
-^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^
+No Op (noop)
+^^^^^^^^^^^^
 
 If no specs in an environment need to be rebuilt during a given pipeline run
 (meaning all are already up to date on the mirror), a single successful job
 (a NO-OP) is still generated to avoid an empty pipeline (which GitLab
-considers to be an error).  An optional ``service-job-attributes`` section
+considers to be an error).  The ``noop-job*`` sections
 can be added to your ``spack.yaml`` where you can provide ``tags`` and
 ``image`` or ``variables`` for the generated NO-OP job.  This section also
 supports providing ``before_script``, ``script``, and ``after_script``, in
@@ -499,51 +446,100 @@ Following is an example of this section added to a ``spack.yaml``:
 
 .. code-block:: yaml
 
-   spack:
-     specs:
-       - openmpi
-     mirrors:
-       cloud_gitlab: https://mirror.spack.io
-     gitlab-ci:
-       mappings:
-         - match:
-             - os=centos8
-           runner-attributes:
-             tags:
-               - custom
-               - tag
-             image: spack/centos7
-       service-job-attributes:
-         tags: ['custom', 'tag']
-         image:
-           name: 'some.image.registry/custom-image:latest'
-           entrypoint: ['/bin/bash']
-         script:
-           - echo "Custom message in a custom script"
+  spack:
+     ci:
+       pipeline-gen:
+       - noop-job:
+           tags: ['custom', 'tag']
+           image:
+             name: 'some.image.registry/custom-image:latest'
+             entrypoint: ['/bin/bash']
+           script::
+             - echo "Custom message in a custom script"
 
 The example above illustrates how you can provide the attributes used to run
 the NO-OP job in the case of an empty pipeline.  The only field for the NO-OP
 job that might be generated for you is ``script``, but that will only happen
-if you do not provide one yourself.
+if you do not provide one yourself. Notice in this example the ``script``
+uses the ``::`` notation to prescribe override behavior. Without this, the
+``echo`` command would have been prepended to the automatically generated script
+rather than replacing it.
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Assignment of specs to runners
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+------------------------------------
+ci.yaml
+------------------------------------
 
-The ``mappings`` section corresponds to a list of runners, and during assignment
-of specs to runners, the list is traversed in order looking for matches, the
-first runner that matches a release spec is assigned to build that spec.  The
-``match`` section within each runner mapping section is a list of specs, and
-if any of those specs match the release spec (the ``spec.satisfies()`` method
-is used), then that runner is considered a match.
+Here's an example of a spack configuration file describing a build pipeline:
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Configuration of specs/jobs for a runner
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+.. code-block:: yaml
 
-Once a runner has been chosen to build a release spec, the ``runner-attributes``
-section provides information determining details of the job in the context of
-the runner.  The ``runner-attributes`` section must have a ``tags`` key, which
+  ci:
+    target: gitlab
+
+    rebuild_index: True
+
+    broken-specs-url: https://broken.specs.url
+
+    broken-tests-packages:
+    - gptune
+
+    pipeline-gen:
+    - submapping:
+      - match:
+          - os=ubuntu18.04
+        build-job:
+          tags:
+            - spack-kube
+          image: spack/ubuntu-bionic
+      - match:
+          - os=centos7
+        build-job:
+          tags:
+            - spack-kube
+          image: spack/centos7
+
+  cdash:
+    build-group: Release Testing
+    url: https://cdash.spack.io
+    project: Spack
+    site: Spack AWS Gitlab Instance
+
+The ``ci`` config section is used to configure how the pipeline workload should be
+generated, mainly how the jobs for building specs should be assigned to the
+configured runners on your instance. The main section for configuring pipelines
+is ``pipeline-gen``, which is a list of job attribute sections that are merged,
+using the same rules as Spack configs (:ref:`config-scope-precedence`), from the bottom up.
+The order sections are applied is to be consistent with how spack orders scope precedence when merging lists.
+There are two main section types, ``<type>-job`` sections and ``submapping``
+sections.
+
+
+^^^^^^^^^^^^^^^^^^^^^^
+Job Attribute Sections
+^^^^^^^^^^^^^^^^^^^^^^
+
+Each type of job may have attributes added or removed via sections in the ``pipeline-gen``
+list. Job type specific attributes may be specified using the keys ``<type>-job`` to
+add attributes to all jobs of type ``<type>`` or ``<type>-job-remove`` to remove attributes
+of type ``<type>``. Each section may only contain one type of job attribute specification, ie. ,
+``build-job`` and ``noop-job`` may not coexist but ``build-job`` and ``build-job-remove`` may.
+
+.. note::
+    The ``*-remove`` specifications are applied before the additive attribute specification.
+    For example, in the case where both ``build-job`` and ``build-job-remove`` are listed in
+    the same ``pipeline-gen`` section, the value will still exist in the merged build-job after
+    applying the section.
+
+All of the attributes specified are forwarded to the generated CI jobs, however special
+treatment is applied to the attributes ``tags``, ``image``, ``variables``, ``script``,
+``before_script``, and ``after_script`` as they are components recognized explicitly by the
+Spack CI generator. For the ``tags`` attribute, Spack will remove reserved tags
+(:ref:`reserved_tags`) from all jobs specified in the config. In some cases, such as for
+``signing`` jobs, reserved tags will be added back based on the type of CI that is being run.
+
+Once a runner has been chosen to build a release spec, the ``build-job*``
+sections provide information determining details of the job in the context of
+the runner.  At lease one of the ``build-job*`` sections must contain a ``tags`` key, which
 is a list containing at least one tag used to select the runner from among the
 runners known to the gitlab instance.  For Docker executor type runners, the
 ``image`` key is used to specify the Docker image used to build the release spec
@@ -554,7 +550,7 @@ information on to the runner that it needs to do its work (e.g. scheduler
 parameters, etc.).  Any ``variables`` provided here will be added, verbatim, to
 each job.
 
-The ``runner-attributes`` section also allows users to supply custom ``script``,
+The ``build-job`` section also allows users to supply custom ``script``,
 ``before_script``, and ``after_script`` sections to be applied to every job
 scheduled on that runner.  This allows users to do any custom preparation or
 cleanup tasks that fit their particular workflow, as well as completely
@@ -565,46 +561,45 @@ environment directory is located within your ``--artifacts_root`` (or if not
 provided, within your ``$CI_PROJECT_DIR``), activates that environment for
 you, and invokes ``spack ci rebuild``.
 
-.. _staging_algorithm:
+Sections that specify scripts (``script``, ``before_script``, ``after_script``) are all
+read as lists of commands or lists of lists of commands. It is recommended to write scripts
+as lists of lists if scripts will be composed via merging. The default behavior of merging
+lists will remove duplicate commands and potentially apply unwanted reordering, whereas
+merging lists of lists will preserve the local ordering and never removes duplicate
+commands. When writing commands to the CI target script, all lists are expanded and
+flattened into a single list.
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Summary of ``.gitlab-ci.yml`` generation algorithm
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^
+Submapping Sections
+^^^^^^^^^^^^^^^^^^^
 
-All specs yielded by the matrix (or all the specs in the environment) have their
-dependencies computed, and the entire resulting set of specs are staged together
-before being run through the ``gitlab-ci/mappings`` entries, where each staged
-spec is assigned a runner.  "Staging" is the name given to the process of
-figuring out in what order the specs should be built, taking into consideration
-Gitlab CI rules about jobs/stages.  In the staging process the goal is to maximize
-the number of jobs in any stage of the pipeline, while ensuring that the jobs in
-any stage only depend on jobs in previous stages (since those jobs are guaranteed
-to have completed already).  As a runner is determined for a job, the information
-in the ``runner-attributes`` is used to populate various parts of the job
-description that will be used by Gitlab CI. Once all the jobs have been assigned
-a runner, the ``.gitlab-ci.yml`` is written to disk.
+A special case of attribute specification is the ``submapping`` section which may be used
+to apply job attributes to build jobs based on the package spec associated with the rebuild
+job. Submapping is specified as a list of spec ``match`` lists associated with
+``build-job``/``build-job-remove`` sections. There are two options for ``match_behavior``,
+either ``first`` or ``merge`` may be specified. In either case, the ``submapping`` list is
+processed from the bottom up, and then each ``match`` list is searched for a string that
+satisfies the check ``spec.satisfies({match_item})`` for each concrete spec.
 
-The short example provided above would result in the ``readline``, ``ncurses``,
-and ``pkgconf`` packages getting staged and built on the runner chosen by the
-``spack-k8s`` tag.  In this example, spack assumes the runner is a Docker executor
-type runner, and thus certain jobs will be run in the ``centos7`` container,
-and others in the ``ubuntu-18.04`` container.  The resulting ``.gitlab-ci.yml``
-will contain 6 jobs in three stages.  Once the jobs have been generated, the
-presence of a ``SPACK_CDASH_AUTH_TOKEN`` environment variable during the
-``spack ci generate`` command would result in all of the jobs being put in a
-build group on CDash called "Release Testing" (that group will be created if
-it didn't already exist).
+The the case of ``match_behavior: first``, the first ``match`` section in the list of
+``submappings`` that contains a string that satisfies the spec will apply it's
+``build-job*`` attributes to the rebuild job associated with that spec. This is the
+default behavior and will be the method if no ``match_behavior`` is specified.
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Optional compiler bootstrapping
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+The the case of ``merge`` match, all of the ``match`` sections in the list of
+``submappings`` that contain a string that satisfies the spec will have the associated
+``build-job*`` attributes applied to the rebuild job associated with that spec. Again,
+the attributes will be merged starting from the bottom match going up to the top match.
 
-Spack pipelines also have support for bootstrapping compilers on systems that
-may not already have the desired compilers installed. The idea here is that
-you can specify a list of things to bootstrap in your ``definitions``, and
-spack will guarantee those will be installed in a phase of the pipeline before
-your release specs, so that you can rely on those packages being available in
-the binary mirror when you need them later on in the pipeline.  At the moment
+In the case that no match is found in a submapping section, no additional attributes will be applied.
+
+^^^^^^^^^^^^^
+Bootstrapping
+^^^^^^^^^^^^^
+
+
+The ``bootstrap`` section allows you to specify lists of specs from
+your ``definitions`` that should be staged ahead of the environment's ``specs``. At the moment
 the only viable use-case for bootstrapping is to install compilers.
 
 Here's an example of what bootstrapping some compilers might look like:
@@ -637,18 +632,18 @@ Here's an example of what bootstrapping some compilers might look like:
        exclude:
          - '%gcc@7.3.0 os=centos7'
          - '%gcc@5.5.0 os=ubuntu18.04'
-     gitlab-ci:
+     ci:
        bootstrap:
          - name: compiler-pkgs
            compiler-agnostic: true
-       mappings:
-         # mappings similar to the example higher up in this description
+       pipeline-gen:
+         # similar to the example higher up in this description
          ...
 
 The example above adds a list to the ``definitions`` called ``compiler-pkgs``
 (you can add any number of these), which lists compiler packages that should
 be staged ahead of the full matrix of release specs (in this example, only
-readline).  Then within the ``gitlab-ci`` section, note the addition of a
+readline).  Then within the ``ci`` section, note the addition of a
 ``bootstrap`` section, which can contain a list of items, each referring to
 a list in the ``definitions`` section.  These items can either
 be a dictionary or a string.  If you supply a dictionary, it must have a name
@@ -680,6 +675,86 @@ environment/stack file, and in that case no bootstrapping will be done (only the
 specs will be staged for building) and the runners will be expected to already
 have all needed compilers installed and configured for spack to use.
 
+^^^^^^^^^^^^^^^^^^^
+Pipeline Buildcache
+^^^^^^^^^^^^^^^^^^^
+
+The ``enable-artifacts-buildcache`` key
+takes a boolean and determines whether the pipeline uses artifacts to store and
+pass along the buildcaches from one stage to the next (the default if you don't
+provide this option is ``False``).
+
+^^^^^^^^^^^^^^^^
+Broken Specs URL
+^^^^^^^^^^^^^^^^
+
+The optional ``broken-specs-url`` key tells Spack to check against a list of
+specs that are known to be currently broken in ``develop``. If any such specs
+are found, the ``spack ci generate`` command will fail with an error message
+informing the user what broken specs were encountered. This allows the pipeline
+to fail early and avoid wasting compute resources attempting to build packages
+that will not succeed.
+
+^^^^^
+CDash
+^^^^^
+
+The optional ``cdash`` section provides information that will be used by the
+``spack ci generate`` command (invoked by ``spack ci start``) for reporting
+to CDash.  All the jobs generated from this environment will belong to a
+"build group" within CDash that can be tracked over time.  As the release
+progresses, this build group may have jobs added or removed. The url, project,
+and site are used to specify the CDash instance to which build results should
+be reported.
+
+Take a look at the
+`schema <https://github.com/spack/spack/blob/develop/lib/spack/spack/schema/ci.py>`_
+for the ci section of the spack environment file, to see precisely what
+syntax is allowed there.
+
+.. _reserved_tags:
+
+^^^^^^^^^^^^^
+Reserved Tags
+^^^^^^^^^^^^^
+
+Spack has a subset of tags (``public``, ``protected``, and ``notary``) that it reserves
+for classifying runners that may require special permissions or access. The tags
+``public`` and ``protected`` are used to distinguish between runners that use public
+permissions and runners with protected permissions. The ``notary`` tag is a special tag
+that is used to indicate runners that have access to the highly protected information
+used for signing binaries using the ``signing`` job.
+
+.. _staging_algorithm:
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Summary of ``.gitlab-ci.yml`` generation algorithm
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+All specs yielded by the matrix (or all the specs in the environment) have their
+dependencies computed, and the entire resulting set of specs are staged together
+before being run through the ``ci/pipeline-gen`` entries, where each staged
+spec is assigned a runner.  "Staging" is the name given to the process of
+figuring out in what order the specs should be built, taking into consideration
+Gitlab CI rules about jobs/stages.  In the staging process the goal is to maximize
+the number of jobs in any stage of the pipeline, while ensuring that the jobs in
+any stage only depend on jobs in previous stages (since those jobs are guaranteed
+to have completed already).  As a runner is determined for a job, the information
+in the merged ``any-job*`` and ``build-job*`` sections is used to populate various parts of the job
+description that will be used by the target CI pipelines. Once all the jobs have been assigned
+a runner, the ``.gitlab-ci.yml`` is written to disk.
+
+The short example provided above would result in the ``readline``, ``ncurses``,
+and ``pkgconf`` packages getting staged and built on the runner chosen by the
+``spack-k8s`` tag.  In this example, spack assumes the runner is a Docker executor
+type runner, and thus certain jobs will be run in the ``centos7`` container,
+and others in the ``ubuntu-18.04`` container.  The resulting ``.gitlab-ci.yml``
+will contain 6 jobs in three stages.  Once the jobs have been generated, the
+presence of a ``SPACK_CDASH_AUTH_TOKEN`` environment variable during the
+``spack ci generate`` command would result in all of the jobs being put in a
+build group on CDash called "Release Testing" (that group will be created if
+it didn't already exist).
+
 -------------------------------------
 Using a custom spack in your pipeline
 -------------------------------------
@@ -726,23 +801,21 @@ generated by ``spack ci generate``.  You also want your generated rebuild jobs
 
    spack:
      ...
-     gitlab-ci:
-       mappings:
-         - match:
-             - os=ubuntu18.04
-           runner-attributes:
-             tags:
-               - spack-kube
-             image: spack/ubuntu-bionic
-             before_script:
-               - git clone ${SPACK_REPO}
-               - pushd spack && git checkout ${SPACK_REF} && popd
-               - . "./spack/share/spack/setup-env.sh"
-             script:
-               - spack env activate --without-view ${SPACK_CONCRETE_ENV_DIR}
-               - spack -d ci rebuild
-             after_script:
-               - rm -rf ./spack
+     ci:
+       pipeline-gen:
+       - build-job:
+           tags:
+             - spack-kube
+           image: spack/ubuntu-bionic
+           before_script:
+             - git clone ${SPACK_REPO}
+             - pushd spack && git checkout ${SPACK_REF} && popd
+             - . "./spack/share/spack/setup-env.sh"
+           script:
+             - spack env activate --without-view ${SPACK_CONCRETE_ENV_DIR}
+             - spack -d ci rebuild
+           after_script:
+             - rm -rf ./spack
 
 Now all of the generated rebuild jobs will use the same shell script to clone
 spack before running their actual workload.
@@ -831,3 +904,4 @@ verify binary packages (when installing or creating buildcaches).  You could
 also have already trusted a key spack know about, or if no key is present anywhere,
 spack will install specs using ``--no-check-signature`` and create buildcaches
 using ``-u`` (for unsigned binaries).
+

lib/spack/docs/repositories.rst

@@ -32,11 +32,16 @@ A package repository a directory structured like this::
           ...
 
 The top-level ``repo.yaml`` file contains configuration metadata for the
-repository, and the ``packages`` directory contains subdirectories for
-each package in the repository.  Each package directory contains a
-``package.py`` file and any patches or other files needed to build the
+repository. The packages subdirectory, typically ``packages``, contains
+subdirectories for each package in the repository.  Each package directory
+contains a ``package.py`` file and any patches or other files needed to build the
 package.
 
+The ``repo.yaml`` file may also contain a ``subdirectory`` key,
+which can modify the name of the subdirectory used for packages. As seen above,
+the default value is ``packages``. An empty string (``subdirectory: ''``) requires
+a flattened repo structure in which the package names are top-level subdirectories.
+
 Package repositories allow you to:
 
 1. Maintain your own packages separately from Spack;
@@ -373,6 +378,24 @@ You can supply a custom namespace with a second argument, e.g.:
   repo:
     namespace: 'llnl.comp'
 
+You can also create repositories with custom structure with the ``-d/--subdirectory``
+argument, e.g.:
+
+.. code-block:: console
+
+  $ spack repo create -d applications myrepo apps
+  ==> Created repo with namespace 'apps'.
+  ==> To register it with Spack, run this command:
+    spack repo add ~/myrepo
+
+  $ ls myrepo
+  applications/  repo.yaml
+
+  $ cat myrepo/repo.yaml
+  repo:
+    namespace: apps
+    subdirectory: applications
+
 ^^^^^^^^^^^^^^^^^^
 ``spack repo add``
 ^^^^^^^^^^^^^^^^^^

lib/spack/docs/requirements.txt

@@ -1,12 +1,13 @@
-# These dependencies should be installed using pip in order
-# to build the documentation.
-
-sphinx>=3.4,!=4.1.2,!=5.1.0
-sphinxcontrib-programoutput
-sphinx-design
-sphinx-rtd-theme
-python-levenshtein
-# Restrict to docutils <0.17 to workaround a list rendering issue in sphinx.
-# https://stackoverflow.com/questions/67542699
-docutils <0.17
-pygments <2.13
+sphinx==6.2.1
+sphinxcontrib-programoutput==0.17
+sphinx_design==0.4.1
+sphinx-rtd-theme==1.2.2
+python-levenshtein==0.21.1
+docutils==0.18.1
+pygments==2.15.1
+urllib3==2.0.3
+pytest==7.4.0
+isort==5.12.0
+black==23.1.0
+flake8==6.0.0
+mypy==1.4.1

lib/spack/docs/signing.rst

@@ -0,0 +1,484 @@
+.. Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
+   Spack Project Developers. See the top-level COPYRIGHT file for details.
+
+   SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+.. _signing:
+
+=====================
+Spack Package Signing
+=====================
+
+The goal of package signing in Spack is to provide data integrity
+assurances around official packages produced by the automated Spack CI
+pipelines. These assurances directly address the security of Spack’s
+software supply chain by explaining why a security-conscious user can
+be reasonably justified in the belief that packages installed via Spack
+have an uninterrupted auditable trail back to change management
+decisions judged to be appropriate by the Spack maintainers. This is
+achieved through cryptographic signing of packages built by Spack CI
+pipelines based on code that has been transparently reviewed and
+approved on GitHub. This document describes the signing process for
+interested users.
+
+.. _risks:
+
+------------------------------
+Risks, Impact and Threat Model
+------------------------------
+
+This document addresses the approach taken to safeguard Spack’s
+reputation with regard to the integrity of the package data produced by
+Spack’s CI pipelines. It does not address issues of data confidentiality
+(Spack is intended to be largely open source) or availability (efforts
+are described elsewhere). With that said the main reputational risk can
+be broadly categorized as a loss of faith in the data integrity due to a
+breach of the private key used to sign packages. Remediation of a
+private key breach would require republishing the public key with a
+revocation certificate, generating a new signing key, an assessment and
+potential rebuild/resigning of all packages since the key was breached,
+and finally direct intervention by every spack user to update their copy
+of Spack’s public keys used for local verification.
+
+The primary threat model used in mitigating the risks of these stated
+impacts is one of individual error not malicious intent or insider
+threat. The primary objective is to avoid the above impacts by making a
+private key breach nearly impossible due to oversight or configuration
+error. Obvious and straightforward measures are taken to mitigate issues
+of malicious interference in data integrity and insider threats but
+these attack vectors are not systematically addressed. It should be hard
+to exfiltrate the private key intentionally, and almost impossible to
+leak the key by accident.
+
+.. _overview:
+
+-----------------
+Pipeline Overview
+-----------------
+
+Spack pipelines build software through progressive stages where packages
+in later stages nominally depend on packages built in earlier stages.
+For both technical and design reasons these dependencies are not
+implemented through the default GitLab artifacts mechanism; instead
+built packages are uploaded to AWS S3 mirrors (buckets) where they are
+retrieved by subsequent stages in the pipeline. Two broad categories of
+pipelines exist: Pull Request (PR) pipelines and Develop/Release
+pipelines.
+
+-  PR pipelines are launched in response to pull requests made by
+   trusted and untrusted users. Packages built on these pipelines upload
+   code to quarantined AWS S3 locations which cache the built packages
+   for the purposes of review and iteration on the changes proposed in
+   the pull request. Packages built on PR pipelines can come from
+   untrusted users so signing of these pipelines is not implemented.
+   Jobs in these pipelines are executed via normal GitLab runners both
+   within the AWS GitLab infrastructure and at affiliated institutions.
+-  Develop and Release pipelines **sign** the packages they produce and carry
+   strong integrity assurances that trace back to auditable change management
+   decisions. These pipelines only run after members from a trusted group of
+   reviewers verify that the proposed changes in a pull request are appropriate.
+   Once the PR is merged, or a release is cut, a pipeline is run on protected
+   GitLab runners which provide access to the required signing keys within the
+   job. Intermediary keys are used to sign packages in each stage of the
+   pipeline as they are built and a final job officially signs each package
+   external to any specific packages’ build environment. An intermediate key
+   exists in the AWS infrastructure and for each affiliated instritution that
+   maintains protected runners. The runners that execute these pipelines
+   exclusively accept jobs from protected branches meaning the intermediate keys
+   are never exposed to unreviewed code and the official keys are never exposed
+   to any specific build environment.
+
+.. _key_architecture:
+
+----------------
+Key Architecture
+----------------
+
+Spack’s CI process uses public-key infrastructure (PKI) based on GNU Privacy
+Guard (gpg) keypairs to sign public releases of spack package metadata, also
+called specs. Two classes of GPG keys are involved in the process to reduce the
+impact of an individual private key compromise, these key classes are the
+*Intermediate CI Key* and *Reputational Key*. Each of these keys has signing
+sub-keys that are used exclusively for signing packages. This can be confusing
+so for the purpose of this explanation we’ll refer to Root and Signing keys.
+Each key has a private and a public component as well as one or more identities
+and zero or more signatures.
+
+-------------------
+Intermediate CI Key
+-------------------
+
+The Intermediate key class is used to sign and verify packages between stages
+within a develop or release pipeline. An intermediate key exists for the AWS
+infrastructure as well as each affiliated institution that maintains protected
+runners. These intermediate keys are made available to the GitLab execution
+environment building the package so that the package’s dependencies may be
+verified by the Signing Intermediate CI Public Key and the final package may be
+signed by the Signing Intermediate CI Private Key.
+
+
++---------------------------------------------------------------------------------------------------------+
+| **Intermediate CI Key (GPG)**                                                                           |
++==================================================+======================================================+
+| Root Intermediate CI Private Key (RSA 4096)#     |     Root Intermediate CI Public Key (RSA 4096)       |
++--------------------------------------------------+------------------------------------------------------+
+|   Signing Intermediate CI Private Key (RSA 4096) |        Signing Intermediate CI Public Key (RSA 4096) |
++--------------------------------------------------+------------------------------------------------------+
+| Identity: “Intermediate CI Key <maintainers@spack.io>”                                                  |
++---------------------------------------------------------------------------------------------------------+
+| Signatures: None                                                                                        |
++---------------------------------------------------------------------------------------------------------+
+
+
+The *Root intermediate CI Private Key*\ Is stripped out of the GPG key and
+stored offline completely separate from Spack’s infrastructure. This allows the
+core development team to append revocation certificates to the GPG key and
+issue new sub-keys for use in the pipeline. It is our expectation that this
+will happen on a semi regular basis. A corollary of this is that *this key
+should not be used to verify package integrity outside the internal CI process.*
+
+----------------
+Reputational Key
+----------------
+
+The Reputational Key is the public facing key used to sign complete groups of
+development and release packages. Only one key pair exsits in this class of
+keys. In contrast to the Intermediate CI Key the Reputational Key *should* be
+used to verify package integrity. At the end of develop and release pipeline a
+final pipeline job pulls down all signed package metadata built by the pipeline,
+verifies they were signed with an Intermediate CI Key, then strips the
+Intermediate CI Key signature from the package and re-signs them with the
+Signing Reputational Private Key. The officially signed packages are then
+uploaded back to the AWS S3 mirror. Please note that separating use of the
+reputational key into this final job is done to prevent leakage of the key in a
+spack package. Because the Signing Reputational Private Key is never exposed to
+a build job it cannot accidentally end up in any built package.
+
+
++---------------------------------------------------------------------------------------------------------+
+| **Reputational Key (GPG)**                                                                              |
++==================================================+======================================================+
+| Root Reputational Private Key (RSA 4096)#        |          Root Reputational Public Key (RSA 4096)     |
++--------------------------------------------------+------------------------------------------------------+
+| Signing Reputational Private Key (RSA 4096)      |          Signing Reputational Public Key (RSA 4096)  |
++--------------------------------------------------+------------------------------------------------------+
+| Identity: “Spack Project <maintainers@spack.io>”                                                        |
++---------------------------------------------------------------------------------------------------------+
+| Signatures: Signed by core development team [#f1]_                                                      |
++---------------------------------------------------------------------------------------------------------+
+
+The Root Reputational Private Key is stripped out of the GPG key and stored
+offline completely separate from Spack’s infrastructure. This allows the core
+development team to append revocation certificates to the GPG key in the
+unlikely event that the Signing Reputation Private Key is compromised. In
+general it is the expectation that rotating this key will happen infrequently if
+at all. This should allow relatively transparent verification for the end-user
+community without needing deep familiarity with GnuPG or Public Key
+Infrastructure.
+
+
+.. _build_cache_format:
+
+------------------
+Build Cache Format
+------------------
+
+A binary package consists of a metadata file unambiguously defining the
+built package (and including other details such as how to relocate it)
+and the installation directory of the package stored as a compressed
+archive file. The metadata files can either be unsigned, in which case
+the contents are simply the json-serialized concrete spec plus metadata,
+or they can be signed, in which case the json-serialized concrete spec
+plus metadata is wrapped in a gpg cleartext signature. Built package
+metadata files are named to indicate the operating system and
+architecture for which the package was built as well as the compiler
+used to build it and the packages name and version. For example::
+
+  linux-ubuntu18.04-haswell-gcc-7.5.0-zlib-1.2.12-llv2ysfdxnppzjrt5ldybb5c52qbmoow.spec.json.sig
+
+would contain the concrete spec and binary metadata for a binary package
+of ``zlib@1.2.12``, built for the ``ubuntu`` operating system and ``haswell``
+architecture. The id of the built package exists in the name of the file
+as well (after the package name and version) and in this case begins
+with ``llv2ys``. The id distinguishes a particular built package from all
+other built packages with the same os/arch, compiler, name, and version.
+Below is an example of a signed binary package metadata file. Such a
+file would live in the ``build_cache`` directory of a binary mirror::
+
+  -----BEGIN PGP SIGNED MESSAGE-----
+  Hash: SHA512
+
+  {
+    "spec": {
+      <concrete-spec-contents-omitted>
+    },
+
+    "buildcache_layout_version": 1,
+    "binary_cache_checksum": {
+      "hash_algorithm": "sha256",
+      "hash": "4f1e46452c35a5e61bcacca205bae1bfcd60a83a399af201a29c95b7cc3e1423"
+     },
+
+    "buildinfo": {
+      "relative_prefix":
+      "linux-ubuntu18.04-haswell/gcc-7.5.0/zlib-1.2.12-llv2ysfdxnppzjrt5ldybb5c52qbmoow",
+      "relative_rpaths": false
+    }
+  }
+
+  -----BEGIN PGP SIGNATURE-----
+  iQGzBAEBCgAdFiEETZn0sLle8jIrdAPLx/P+voVcifMFAmKAGvwACgkQx/P+voVc
+  ifNoVgv/VrhA+wurVs5GB9PhmMA1m5U/AfXZb4BElDRwpT8ZcTPIv5X8xtv60eyn
+  4EOneGVbZoMThVxgev/NKARorGmhFXRqhWf+jknJZ1dicpqn/qpv34rELKUpgXU+
+  QDQ4d1P64AIdTczXe2GI9ZvhOo6+bPvK7LIsTkBbtWmopkomVxF0LcMuxAVIbA6b
+  887yBvVO0VGlqRnkDW7nXx49r3AG2+wDcoU1f8ep8QtjOcMNaPTPJ0UnjD0VQGW6
+  4ZFaGZWzdo45MY6tF3o5mqM7zJkVobpoW3iUz6J5tjz7H/nMlGgMkUwY9Kxp2PVH
+  qoj6Zip3LWplnl2OZyAY+vflPFdFh12Xpk4FG7Sxm/ux0r+l8tCAPvtw+G38a5P7
+  QEk2JBr8qMGKASmnRlJUkm1vwz0a95IF3S9YDfTAA2vz6HH3PtsNLFhtorfx8eBi
+  Wn5aPJAGEPOawEOvXGGbsH4cDEKPeN0n6cy1k92uPEmBLDVsdnur8q42jk5c2Qyx
+  j3DXty57
+  =3gvm
+  -----END PGP SIGNATURE-----
+
+If a user has trusted the public key associated with the private key
+used to sign the above spec file, the signature can be verified with
+gpg, as follows::
+
+  $ gpg –verify linux-ubuntu18.04-haswell-gcc-7.5.0-zlib-1.2.12-llv2ysfdxnppzjrt5ldybb5c52qbmoow.spec.json.sig
+
+The metadata (regardless whether signed or unsigned) contains the checksum
+of the ``.spack`` file containing the actual installation. The checksum should
+be compared to a checksum computed locally on the ``.spack`` file to ensure the
+contents have not changed since the binary spec plus metadata were signed. The
+``.spack`` files are actually tarballs containing the compressed archive of the
+install tree.  These files, along with the metadata files, live within the
+``build_cache`` directory of the mirror, and together are organized as follows::
+
+  build_cache/
+    # unsigned metadata (for indexing, contains sha256 of .spack file)
+    <arch>-<compiler>-<name>-<ver>-24zvipcqgg2wyjpvdq2ajy5jnm564hen.spec.json
+    # clearsigned metadata (same as above, but signed)
+    <arch>-<compiler>-<name>-<ver>-24zvipcqgg2wyjpvdq2ajy5jnm564hen.spec.json.sig
+    <arch>/
+      <compiler>/
+        <name>-<ver>/
+          # tar.gz-compressed prefix (may support more compression formats later)
+          <arch>-<compiler>-<name>-<ver>-24zvipcqgg2wyjpvdq2ajy5jnm564hen.spack
+
+Uncompressing and extracting the ``.spack`` file results in the install tree.
+This is in contrast to previous versions of spack, where the ``.spack`` file
+contained a (duplicated) metadata file, a signature file and a nested tarball
+containing the install tree.
+
+.. _internal_implementation:
+
+-----------------------
+Internal Implementation
+-----------------------
+
+The technical implementation of the pipeline signing process includes components
+defined in Amazon Web Services, the Kubernetes cluster, at affilicated
+institutions, and the GitLab/GitLab Runner deployment. We present the techincal
+implementation in two interdependent sections. The first addresses how secrets
+are managed through the lifecycle of a develop or release pipeline. The second
+section describes how Gitlab Runner and pipelines are configured and managed to
+support secure automated signing.
+
+Secrets Management
+^^^^^^^^^^^^^^^^^^
+
+As stated above the Root Private Keys (intermediate and reputational)
+are stripped from the GPG keys and stored outside Spack’s
+infrastructure.
+
+.. warning::
+  **TODO**
+    - Explanation here about where and how access is handled for these keys.
+    - Both Root private keys are protected with strong passwords
+    - Who has access to these and how?
+
+**Intermediate CI Key**
+-----------------------
+
+Multiple intermediate CI signing keys exist, one Intermediate CI Key for jobs
+run in AWS, and one key for each affiliated institution (e.g. Univerity of
+Oregon). Here we describe how the Intermediate CI Key is managed in AWS:
+
+The Intermediate CI Key (including the Signing Intermediate CI Private Key is
+exported as an ASCII armored file and stored in a Kubernetes secret called
+``spack-intermediate-ci-signing-key``. For convenience sake, this same secret
+contains an ASCII-armored export of just the *public* components of the
+Reputational Key. This secret also contains the *public* components of each of
+the affiliated institutions' Intermediate CI Key. These are potentially needed
+to verify dependent packages which may have been found in the public mirror or
+built by a protected job running on an affiliated institution's infrastrcuture
+in an earlier stage of the pipeline.
+
+Procedurally the ``spack-intermediate-ci-signing-key`` secret is used in
+the following way:
+
+1. A ``large-arm-prot`` or ``large-x86-prot`` protected runner picks up
+   a job tagged ``protected`` from a protected GitLab branch. (See
+   `Protected Runners and Reserved Tags <#_8bawjmgykv0b>`__).
+2. Based on its configuration, the runner creates a job Pod in the
+   pipeline namespace and mounts the spack-intermediate-ci-signing-key
+   Kubernetes secret into the build container
+3. The Intermediate CI Key, affiliated institutions' public key and the
+   Reputational Public Key are imported into a keyring by the ``spack gpg …``
+   sub-command. This is initiated by the job’s build script which is created by
+   the generate job at the beginning of the pipeline.
+4. Assuming the package has dependencies those specs are verified using
+   the keyring.
+5. The package is built and the spec.json is generated
+6. The spec.json is signed by the keyring and uploaded to the mirror’s
+   build cache.
+
+**Reputational Key**
+--------------------
+
+Because of the increased impact to end users in the case of a private
+key breach, the Reputational Key is managed separately from the
+Intermediate CI Keys and has additional controls. First, the Reputational
+Key was generated outside of Spack’s infrastructure and has been signed
+by the core development team. The Reputational Key (along with the
+Signing Reputational Private Key) was then ASCII armor exported to a
+file. Unlike the Intermediate CI Key this exported file is not stored as
+a base64 encoded secret in Kubernetes. Instead\ *the key file
+itself*\ is encrypted and stored in Kubernetes as the
+``spack-signing-key-encrypted`` secret in the pipeline namespace.
+
+The encryption of the exported Reputational Key (including the Signing
+Reputational Private Key) is handled by `AWS Key Management Store (KMS) data
+keys
+<https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#data-keys>`__.
+The private key material is decrypted and imported at the time of signing into a
+memory mounted temporary directory holding the keychain. The signing job uses
+the `AWS Encryption SDK
+<https://docs.aws.amazon.com/encryption-sdk/latest/developer-guide/crypto-cli.html>`__
+(i.e. ``aws-encryption-cli``) to decrypt the Reputational Key. Permission to
+decrypt the key is granted to the job Pod through a Kubernetes service account
+specifically used for this, and only this, function. Finally, for convenience
+sake, this same secret contains an ASCII-armored export of the *public*
+components of the Intermediate CI Keys and the Reputational Key. This allows the
+signing script to verify that packages were built by the pipeline (both on AWS
+or at affiliated institutions), or signed previously as a part of a different
+pipeline. This is is done *before* importing decrypting and importing the
+Signing Reputational Private Key material and officially signing the packages.
+
+Procedurally the ``spack-singing-key-encrypted`` secret is used in the
+following way:
+
+1.  The ``spack-package-signing-gitlab-runner`` protected runner picks
+    up a job tagged ``notary`` from a protected GitLab branch (See
+    `Protected Runners and Reserved Tags <#_8bawjmgykv0b>`__).
+2.  Based on its configuration, the runner creates a job pod in the
+    pipeline namespace. The job is run in a stripped down purpose-built
+    image ``ghcr.io/spack/notary:latest`` Docker image. The runner is
+    configured to only allow running jobs with this image.
+3.  The runner also mounts the ``spack-signing-key-encrypted`` secret to
+    a path on disk. Note that this becomes several files on disk, the
+    public components of the Intermediate CI Keys, the public components
+    of the Reputational CI, and an AWS KMS encrypted file containing the
+    Singing Reputational Private Key.
+4.  In addition to the secret, the runner creates a tmpfs memory mounted
+    directory where the GnuPG keyring will be created to verify, and
+    then resign the package specs.
+5.  The job script syncs all spec.json.sig files from the build cache to
+    a working directory in the job’s execution environment.
+6.  The job script then runs the ``sign.sh`` script built into the
+    notary Docker image.
+7.  The ``sign.sh`` script imports the public components of the
+    Reputational and Intermediate CI Keys and uses them to verify good
+    signatures on the spec.json.sig files. If any signed spec does not
+    verify the job immediately fails.
+8.  Assuming all specs are verified, the ``sign.sh`` script then unpacks
+    the spec json data from the signed file in preparation for being
+    re-signed with the Reputational Key.
+9.  The private components of the Reputational Key are decrypted to
+    standard out using ``aws-encryption-cli`` directly into a ``gpg
+    –import …`` statement which imports the key into the
+    keyring mounted in-memory.
+10. The private key is then used to sign each of the json specs and the
+    keyring is removed from disk.
+11. The re-signed json specs are resynced to the AWS S3 Mirror and the
+    public signing of the packages for the develop or release pipeline
+    that created them is complete.
+
+Non service-account access to the private components of the Reputational
+Key that are managed through access to the symmetric secret in KMS used
+to encrypt the data key (which in turn is used to encrypt the GnuPG key
+- See:\ `Encryption SDK
+Documentation <https://docs.aws.amazon.com/encryption-sdk/latest/developer-guide/crypto-cli-examples.html#cli-example-encrypt-file>`__).
+A small trusted subset of the core development team are the only
+individuals with access to this symmetric key.
+
+.. _protected_runners:
+
+Protected Runners and Reserved Tags
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Spack has a large number of Gitlab Runners operating in its build farm.
+These include runners deployed in the AWS Kubernetes cluster as well as
+runners deployed at affiliated institutions. The majority of runners are
+shared runners that operate across projects in gitlab.spack.io. These
+runners pick up jobs primarily from the spack/spack project and execute
+them in PR pipelines.
+
+A small number of runners operating on AWS and at affiliated institutions are
+registered as specific *protected* runners on the spack/spack project. In
+addition to protected runners there are protected branches on the spack/spack
+project. These are the ``develop`` branch, any release branch (i.e. managed with
+the ``releases/v*`` wildcard) and any tag branch (managed with the ``v*``
+wildcard) Finally Spack’s pipeline generation code reserves certain tags to make
+sure jobs are routed to the correct runners, these tags are ``public``,
+``protected``, and ``notary``. Understanding how all this works together to
+protect secrets and provide integrity assurances can be a little confusing so
+lets break these down:
+
+-  **Protected Branches**- Protected branches in Spack prevent anyone
+   other than Maintainers in GitLab from pushing code. In the case of
+   Spack the only Maintainer level entity pushing code to protected
+   branches is Spack bot. Protecting branches also marks them in such a
+   way that Protected Runners will only run jobs from those branches
+- **Protected Runners**- Protected Runners only run jobs from protected
+   branches. Because protected runners have access to secrets, it's critical
+   that they not run Jobs from untrusted code (i.e. PR branches). If they did it
+   would be possible for a PR branch to tag a job in such a way that a protected
+   runner executed that job and mounted secrets into a code execution
+   environment that had not been reviewed by Spack maintainers. Note however
+   that in the absence of tagging used to route jobs, public runners *could* run
+   jobs from protected branches. No secrets would be at risk of being breached
+   because non-protected runners do not have access to those secrets; lack of
+   secrets would, however, cause the jobs to fail.
+- **Reserved Tags**- To mitigate the issue of public runners picking up
+   protected jobs Spack uses a small set of “reserved” job tags (Note that these
+   are *job* tags not git tags). These tags are “public”, “private”, and
+   “notary.” The majority of jobs executed in Spack’s GitLab instance are
+   executed via a ``generate`` job. The generate job code systematically ensures
+   that no user defined configuration sets these tags. Instead, the ``generate``
+   job sets these tags based on rules related to the branch where this pipeline
+   originated. If the job is a part of a pipeline on a PR branch it sets the
+   ``public`` tag. If the job is part of a pipeline on a protected branch it
+   sets the ``protected`` tag. Finally if the job is the package signing job and
+   it is running on a pipeline that is part of a protected branch then it sets
+   the ``notary`` tag.
+
+Protected Runners are configured to only run jobs from protected branches. Only
+jobs running in pipelines on protected branches are tagged with ``protected`` or
+``notary`` tags. This tightly couples jobs on protected branches to protected
+runners that provide access to the secrets required to sign the built packages.
+The secrets are can **only** be accessed via:
+
+1. Runners under direct control of the core development team.
+2. Runners under direct control of trusted maintainers at affiliated institutions.
+3. By code running the automated pipeline that has been reviewed by the
+   Spack maintainers and judged to be appropriate.
+
+Other attempts (either through malicious intent or incompetence) can at
+worst grab jobs intended for protected runners which will cause those
+jobs to fail alerting both Spack maintainers and the core development
+team.
+
+.. [#f1]
+   The Reputational Key has also cross signed core development team
+   keys.

lib/spack/env/cc

@@ -416,197 +416,261 @@ input_command="$*"
 # The lists are all bell-separated to be as flexible as possible, as their
 # contents may come from the command line, from ' '-separated lists,
 # ':'-separated lists, etc.
-include_dirs_list=""
-lib_dirs_list=""
-rpath_dirs_list=""
-system_include_dirs_list=""
-system_lib_dirs_list=""
-system_rpath_dirs_list=""
-isystem_system_include_dirs_list=""
-isystem_include_dirs_list=""
-libs_list=""
-other_args_list=""
 
-
-while [ $# -ne 0 ]; do
-
-    # an RPATH to be added after the case statement.
-    rp=""
-
-    # Multiple consecutive spaces in the command line can
-    # result in blank arguments
-    if [ -z "$1" ]; then
-        shift
-        continue
-    fi
-
-    if [ -n "${SPACK_COMPILER_FLAGS_KEEP}" ] ; then
-        # NOTE: the eval is required to allow `|` alternatives inside the variable
-        eval "\
-        case \"\$1\" in
-            $SPACK_COMPILER_FLAGS_KEEP)
-                append other_args_list \"\$1\"
-                shift
-                continue
+parse_Wl() {
+    while [ $# -ne 0 ]; do
+    if [ "$wl_expect_rpath" = yes ]; then
+        if system_dir "$1"; then
+            append return_system_rpath_dirs_list "$1"
+        else
+            append return_rpath_dirs_list "$1"
+        fi
+        wl_expect_rpath=no
+    else
+        case "$1" in
+            -rpath=*)
+                arg="${1#-rpath=}"
+                if [ -z "$arg" ]; then
+                    shift; continue
+                elif system_dir "$arg"; then
+                    append return_system_rpath_dirs_list "$arg"
+                else
+                    append return_rpath_dirs_list "$arg"
+                fi
+                ;;
+            --rpath=*)
+                arg="${1#--rpath=}"
+                if [ -z "$arg" ]; then
+                    shift; continue
+                elif system_dir "$arg"; then
+                    append return_system_rpath_dirs_list "$arg"
+                else
+                    append return_rpath_dirs_list "$arg"
+                fi
+                ;;
+            -rpath|--rpath)
+                wl_expect_rpath=yes
+                ;;
+            "$dtags_to_strip")
+                ;;
+            -Wl)
+                # Nested -Wl,-Wl means we're in NAG compiler territory, we don't support
+                # it.
+                return 1
+                ;;
+            *)
+                append return_other_args_list "-Wl,$1"
                 ;;
         esac
-        "
-    fi
-    # the replace list is a space-separated list of pipe-separated pairs,
-    # the first in each pair is the original prefix to be matched, the
-    # second is the replacement prefix
-    if [ -n "${SPACK_COMPILER_FLAGS_REPLACE}" ] ; then
-        for rep in ${SPACK_COMPILER_FLAGS_REPLACE} ; do
-            before=${rep%|*}
-            after=${rep#*|}
-            eval "\
-            stripped=\"\${1##$before}\"
-            "
-            if [ "$stripped" = "$1" ] ; then
-                continue
-            fi
-
-            replaced="$after$stripped" 
-
-            # it matched, remove it
-            shift
-
-            if [ -z "$replaced" ] ; then
-                # completely removed, continue OUTER loop
-                continue 2
-            fi
-
-            # re-build argument list with replacement
-            set -- "$replaced" "$@"
-        done
-    fi
-
-    case "$1" in
-        -isystem*)
-            arg="${1#-isystem}"
-            isystem_was_used=true
-            if [ -z "$arg" ]; then shift; arg="$1"; fi
-            if system_dir "$arg"; then
-                append isystem_system_include_dirs_list "$arg"
-            else
-                append isystem_include_dirs_list "$arg"
-            fi
-            ;;
-        -I*)
-            arg="${1#-I}"
-            if [ -z "$arg" ]; then shift; arg="$1"; fi
-            if system_dir "$arg"; then
-                append system_include_dirs_list "$arg"
-            else
-                append include_dirs_list "$arg"
-            fi
-            ;;
-        -L*)
-            arg="${1#-L}"
-            if [ -z "$arg" ]; then shift; arg="$1"; fi
-            if system_dir "$arg"; then
-                append system_lib_dirs_list "$arg"
-            else
-                append lib_dirs_list "$arg"
-            fi
-            ;;
-        -l*)
-            # -loopopt=0 is generated erroneously in autoconf <= 2.69,
-            # and passed by ifx to the linker, which confuses it with a
-            # library. Filter it out.
-            # TODO: generalize filtering of args with an env var, so that
-            # TODO: we do not have to special case this here.
-            if { [ "$mode" = "ccld" ] || [ $mode = "ld" ]; } \
-                && [ "$1" != "${1#-loopopt}" ]; then
-                shift
-                continue
-            fi
-            arg="${1#-l}"
-            if [ -z "$arg" ]; then shift; arg="$1"; fi
-            append other_args_list "-l$arg"
-            ;;
-        -Wl,*)
-            arg="${1#-Wl,}"
-            if [ -z "$arg" ]; then shift; arg="$1"; fi
-            case "$arg" in
-                -rpath=*)  rp="${arg#-rpath=}"  ;;
-                --rpath=*) rp="${arg#--rpath=}" ;;
-                -rpath,*)  rp="${arg#-rpath,}"  ;;
-                --rpath,*) rp="${arg#--rpath,}" ;;
-                -rpath|--rpath)
-                    shift; arg="$1"
-                    case "$arg" in
-                        -Wl,*)
-                            rp="${arg#-Wl,}"
-                            ;;
-                        *)
-                            die "-Wl,-rpath was not followed by -Wl,*"
-                            ;;
-                    esac
-                    ;;
-                "$dtags_to_strip")
-                    :  # We want to remove explicitly this flag
-                    ;;
-                *)
-                    append other_args_list "-Wl,$arg"
-                    ;;
-            esac
-            ;;
-        -Xlinker,*)
-            arg="${1#-Xlinker,}"
-            if [ -z "$arg" ]; then shift; arg="$1"; fi
-
-            case "$arg" in
-                -rpath=*)  rp="${arg#-rpath=}"  ;;
-                --rpath=*) rp="${arg#--rpath=}" ;;
-                -rpath|--rpath)
-                    shift; arg="$1"
-                    case "$arg" in
-                        -Xlinker,*)
-                            rp="${arg#-Xlinker,}"
-                        ;;
-                        *)
-                            die "-Xlinker,-rpath was not followed by -Xlinker,*"
-                            ;;
-                    esac
-                    ;;
-                *)
-                    append other_args_list "-Xlinker,$arg"
-                    ;;
-            esac
-            ;;
-        -Xlinker)
-            if [ "$2" = "-rpath" ]; then
-                if [ "$3" != "-Xlinker" ]; then
-                    die "-Xlinker,-rpath was not followed by -Xlinker,*"
-                fi
-                shift 3;
-                rp="$1"
-            elif [ "$2" = "$dtags_to_strip" ]; then
-                shift  # We want to remove explicitly this flag
-            else
-                append other_args_list "$1"
-            fi
-            ;;
-        *)
-            if [ "$1" = "$dtags_to_strip" ]; then
-                :  # We want to remove explicitly this flag
-            else
-                append other_args_list "$1"
-            fi
-            ;;
-    esac
-
-    # test rpaths against system directories in one place.
-    if [ -n "$rp" ]; then
-        if system_dir "$rp"; then
-            append system_rpath_dirs_list "$rp"
-        else
-            append rpath_dirs_list "$rp"
-        fi
     fi
     shift
-done
+    done
+}
+
+categorize_arguments() {
+
+    unset IFS
+
+    return_other_args_list=""
+    return_isystem_was_used=""
+    return_isystem_system_include_dirs_list=""
+    return_isystem_include_dirs_list=""
+    return_system_include_dirs_list=""
+    return_include_dirs_list=""
+    return_system_lib_dirs_list=""
+    return_lib_dirs_list=""
+    return_system_rpath_dirs_list=""
+    return_rpath_dirs_list=""
+
+    # Global state for keeping track of -Wl,-rpath -Wl,/path
+    wl_expect_rpath=no
+
+    # Same, but for -Xlinker -rpath -Xlinker /path
+    xlinker_expect_rpath=no
+
+    while [ $# -ne 0 ]; do
+
+        # an RPATH to be added after the case statement.
+        rp=""
+
+        # Multiple consecutive spaces in the command line can
+        # result in blank arguments
+        if [ -z "$1" ]; then
+            shift
+            continue
+        fi
+
+        if [ -n "${SPACK_COMPILER_FLAGS_KEEP}" ] ; then
+            # NOTE: the eval is required to allow `|` alternatives inside the variable
+            eval "\
+            case \"\$1\" in
+                $SPACK_COMPILER_FLAGS_KEEP)
+                    append return_other_args_list \"\$1\"
+                    shift
+                    continue
+                    ;;
+            esac
+            "
+        fi
+        # the replace list is a space-separated list of pipe-separated pairs,
+        # the first in each pair is the original prefix to be matched, the
+        # second is the replacement prefix
+        if [ -n "${SPACK_COMPILER_FLAGS_REPLACE}" ] ; then
+            for rep in ${SPACK_COMPILER_FLAGS_REPLACE} ; do
+                before=${rep%|*}
+                after=${rep#*|}
+                eval "\
+                stripped=\"\${1##$before}\"
+                "
+                if [ "$stripped" = "$1" ] ; then
+                    continue
+                fi
+
+                replaced="$after$stripped" 
+
+                # it matched, remove it
+                shift
+
+                if [ -z "$replaced" ] ; then
+                    # completely removed, continue OUTER loop
+                    continue 2
+                fi
+
+                # re-build argument list with replacement
+                set -- "$replaced" "$@"
+            done
+        fi
+
+        case "$1" in
+            -isystem*)
+                arg="${1#-isystem}"
+                return_isystem_was_used=true
+                if [ -z "$arg" ]; then shift; arg="$1"; fi
+                if system_dir "$arg"; then
+                    append return_isystem_system_include_dirs_list "$arg"
+                else
+                    append return_isystem_include_dirs_list "$arg"
+                fi
+                ;;
+            -I*)
+                arg="${1#-I}"
+                if [ -z "$arg" ]; then shift; arg="$1"; fi
+                if system_dir "$arg"; then
+                    append return_system_include_dirs_list "$arg"
+                else
+                    append return_include_dirs_list "$arg"
+                fi
+                ;;
+            -L*)
+                arg="${1#-L}"
+                if [ -z "$arg" ]; then shift; arg="$1"; fi
+                if system_dir "$arg"; then
+                    append return_system_lib_dirs_list "$arg"
+                else
+                    append return_lib_dirs_list "$arg"
+                fi
+                ;;
+            -l*)
+                # -loopopt=0 is generated erroneously in autoconf <= 2.69,
+                # and passed by ifx to the linker, which confuses it with a
+                # library. Filter it out.
+                # TODO: generalize filtering of args with an env var, so that
+                # TODO: we do not have to special case this here.
+                if { [ "$mode" = "ccld" ] || [ $mode = "ld" ]; } \
+                    && [ "$1" != "${1#-loopopt}" ]; then
+                    shift
+                    continue
+                fi
+                arg="${1#-l}"
+                if [ -z "$arg" ]; then shift; arg="$1"; fi
+                append return_other_args_list "-l$arg"
+                ;;
+            -Wl,*)
+                IFS=,
+                if ! parse_Wl ${1#-Wl,}; then
+                    append return_other_args_list "$1"
+                fi
+                unset IFS
+                ;;
+            -Xlinker)
+                shift
+                if [ $# -eq 0 ]; then
+                    # -Xlinker without value: let the compiler error about it.
+                    append return_other_args_list -Xlinker
+                    xlinker_expect_rpath=no
+                    break
+                elif [ "$xlinker_expect_rpath" = yes ]; then
+                    # Register the path of -Xlinker -rpath <other args> -Xlinker <path>
+                    if system_dir "$1"; then
+                        append return_system_rpath_dirs_list "$1"
+                    else
+                        append return_rpath_dirs_list "$1"
+                    fi
+                    xlinker_expect_rpath=no
+                else
+                    case "$1" in
+                        -rpath=*)
+                            arg="${1#-rpath=}"
+                            if system_dir "$arg"; then
+                                append return_system_rpath_dirs_list "$arg"
+                            else
+                                append return_rpath_dirs_list "$arg"
+                            fi
+                            ;;
+                        --rpath=*)
+                            arg="${1#--rpath=}"
+                            if system_dir "$arg"; then
+                                append return_system_rpath_dirs_list "$arg"
+                            else
+                                append return_rpath_dirs_list "$arg"
+                            fi
+                            ;;
+                        -rpath|--rpath)
+                            xlinker_expect_rpath=yes
+                            ;;
+                        "$dtags_to_strip")
+                            ;;
+                        *)
+                            append return_other_args_list -Xlinker
+                            append return_other_args_list "$1"
+                            ;;
+                    esac
+                fi
+                ;;
+            "$dtags_to_strip")
+                ;;
+            *)
+                append return_other_args_list "$1"
+                ;;
+        esac
+        shift
+    done
+
+    # We found `-Xlinker -rpath` but no matching value `-Xlinker /path`. Just append
+    # `-Xlinker -rpath` again and let the compiler or linker handle the error during arg
+    # parsing.
+    if [ "$xlinker_expect_rpath" = yes ]; then
+        append return_other_args_list -Xlinker
+        append return_other_args_list -rpath
+    fi
+
+    # Same, but for -Wl flags.
+    if [ "$wl_expect_rpath" = yes ]; then
+        append return_other_args_list -Wl,-rpath
+    fi
+}
+
+categorize_arguments "$@"
+    include_dirs_list="$return_include_dirs_list"
+    lib_dirs_list="$return_lib_dirs_list"
+    rpath_dirs_list="$return_rpath_dirs_list"
+    system_include_dirs_list="$return_system_include_dirs_list"
+    system_lib_dirs_list="$return_system_lib_dirs_list"
+    system_rpath_dirs_list="$return_system_rpath_dirs_list"
+    isystem_was_used="$return_isystem_was_used"
+    isystem_system_include_dirs_list="$return_isystem_system_include_dirs_list"
+    isystem_include_dirs_list="$return_isystem_include_dirs_list"
+    other_args_list="$return_other_args_list"
 
 #
 # Add flags from Spack's cppflags, cflags, cxxflags, fcflags, fflags, and
@@ -626,12 +690,14 @@ elif [ "$SPACK_ADD_DEBUG_FLAGS" = "custom" ]; then
     extend flags_list SPACK_DEBUG_FLAGS
 fi
 
+spack_flags_list=""
+
 # Fortran flags come before CPPFLAGS
 case "$mode" in
     cc|ccld)
         case $lang_flags in
             F)
-                extend flags_list SPACK_FFLAGS
+                extend spack_flags_list SPACK_FFLAGS
                 ;;
         esac
         ;;
@@ -640,7 +706,7 @@ esac
 # C preprocessor flags come before any C/CXX flags
 case "$mode" in
     cpp|as|cc|ccld)
-        extend flags_list SPACK_CPPFLAGS
+        extend spack_flags_list SPACK_CPPFLAGS
         ;;
 esac
 
@@ -650,10 +716,10 @@ case "$mode" in
     cc|ccld)
         case $lang_flags in
             C)
-                extend flags_list SPACK_CFLAGS
+                extend spack_flags_list SPACK_CFLAGS
                 ;;
             CXX)
-                extend flags_list SPACK_CXXFLAGS
+                extend spack_flags_list SPACK_CXXFLAGS
                 ;;
         esac
 
@@ -665,10 +731,25 @@ esac
 # Linker flags
 case "$mode" in
     ld|ccld)
-        extend flags_list SPACK_LDFLAGS
+        extend spack_flags_list SPACK_LDFLAGS
         ;;
 esac
 
+IFS="$lsep"
+    categorize_arguments $spack_flags_list
+unset IFS
+        spack_flags_include_dirs_list="$return_include_dirs_list"
+        spack_flags_lib_dirs_list="$return_lib_dirs_list"
+        spack_flags_rpath_dirs_list="$return_rpath_dirs_list"
+        spack_flags_system_include_dirs_list="$return_system_include_dirs_list"
+        spack_flags_system_lib_dirs_list="$return_system_lib_dirs_list"
+        spack_flags_system_rpath_dirs_list="$return_system_rpath_dirs_list"
+        spack_flags_isystem_was_used="$return_isystem_was_used"
+        spack_flags_isystem_system_include_dirs_list="$return_isystem_system_include_dirs_list"
+        spack_flags_isystem_include_dirs_list="$return_isystem_include_dirs_list"
+        spack_flags_other_args_list="$return_other_args_list"
+
+
 # On macOS insert headerpad_max_install_names linker flag
 if [ "$mode" = ld ] || [ "$mode" = ccld ]; then
     if [ "${SPACK_SHORT_SPEC#*darwin}" != "${SPACK_SHORT_SPEC}" ]; then
@@ -694,6 +775,8 @@ if [ "$mode" = ccld ] || [ "$mode" = ld ]; then
     extend lib_dirs_list SPACK_LINK_DIRS
 fi
 
+libs_list=""
+
 # add RPATHs if we're in in any linking mode
 case "$mode" in
     ld|ccld)
@@ -722,12 +805,16 @@ args_list="$flags_list"
 
 # Insert include directories just prior to any system include directories
 # NOTE: adding ${lsep} to the prefix here turns every added element into two
+extend args_list spack_flags_include_dirs_list "-I"
 extend args_list include_dirs_list "-I"
+extend args_list spack_flags_isystem_include_dirs_list "-isystem${lsep}"
 extend args_list isystem_include_dirs_list "-isystem${lsep}"
 
 case "$mode" in
     cpp|cc|as|ccld)
-        if [ "$isystem_was_used" = "true" ]; then
+        if [ "$spack_flags_isystem_was_used" = "true" ]; then
+            extend args_list SPACK_INCLUDE_DIRS "-isystem${lsep}"
+        elif [ "$isystem_was_used" = "true" ]; then
             extend args_list SPACK_INCLUDE_DIRS "-isystem${lsep}"
         else
             extend args_list SPACK_INCLUDE_DIRS "-I"
@@ -735,11 +822,15 @@ case "$mode" in
         ;;
 esac
 
+extend args_list spack_flags_system_include_dirs_list -I
 extend args_list system_include_dirs_list -I
+extend args_list spack_flags_isystem_system_include_dirs_list "-isystem${lsep}"
 extend args_list isystem_system_include_dirs_list "-isystem${lsep}"
 
 # Library search paths
+extend args_list spack_flags_lib_dirs_list "-L"
 extend args_list lib_dirs_list "-L"
+extend args_list spack_flags_system_lib_dirs_list "-L"
 extend args_list system_lib_dirs_list "-L"
 
 # RPATHs arguments
@@ -748,20 +839,25 @@ case "$mode" in
         if [ -n "$dtags_to_add" ] ; then
             append args_list "$linker_arg$dtags_to_add"
         fi
+        extend args_list spack_flags_rpath_dirs_list "$rpath"
         extend args_list rpath_dirs_list "$rpath"
+        extend args_list spack_flags_system_rpath_dirs_list "$rpath"
         extend args_list system_rpath_dirs_list "$rpath"
         ;;
     ld)
         if [ -n "$dtags_to_add" ] ; then
             append args_list "$dtags_to_add"
         fi
+        extend args_list spack_flags_rpath_dirs_list "-rpath${lsep}"
         extend args_list rpath_dirs_list "-rpath${lsep}"
+        extend args_list spack_flags_system_rpath_dirs_list "-rpath${lsep}"
         extend args_list system_rpath_dirs_list "-rpath${lsep}"
         ;;
 esac
 
 # Other arguments from the input command
 extend args_list other_args_list
+extend args_list spack_flags_other_args_list
 
 # Inject SPACK_LDLIBS, if supplied
 extend args_list libs_list "-l"
@@ -817,3 +913,4 @@ fi
 # Execute the full command, preserving spaces with IFS set
 # to the alarm bell separator.
 IFS="$lsep"; exec $full_command_list
+

lib/spack/external/__init__.py

@@ -18,7 +18,7 @@
 
 * Homepage: https://pypi.python.org/pypi/archspec
 * Usage: Labeling, comparison and detection of microarchitectures
-* Version: 0.2.0 (commit e44bad9c7b6defac73696f64078b2fe634719b62)
+* Version: 0.2.1 (commit 9e1117bd8a2f0581bced161f2a2e8d6294d0300b)
 
 astunparse
 ----------------
@@ -101,10 +101,7 @@
 * Usage: Used for config files. Ruamel is based on PyYAML but is more
   actively maintained and has more features, including round-tripping
   comments read from config files.
-* Version: 0.11.15 (last version supporting Python 2.6)
-* Note: This package has been slightly modified to improve Python 2.6
-  compatibility -- some ``{}`` format strings were replaced, and the
-  import for ``OrderedDict`` was tweaked.
+* Version: 0.17.21
 
 six
 ---

lib/spack/external/_vendoring/ruamel.pyi

@@ -0,0 +1 @@
+from ruamel import *

lib/spack/external/_vendoring/ruamel.yaml.LICENSE

@@ -1,21 +1,21 @@
- 
  The MIT License (MIT)
 
+ Copyright (c) 2014-2022 Anthon van der Neut, Ruamel bvba
+
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
-     
+
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
- 
+
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
- THE SOFTWARE.
-
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.

lib/spack/external/_vendoring/ruamel/yaml/__init__.py

@@ -0,0 +1,57 @@
+# coding: utf-8
+
+if False:  # MYPY
+    from typing import Dict, Any  # NOQA
+
+_package_data = dict(
+    full_package_name='ruamel.yaml',
+    version_info=(0, 17, 21),
+    __version__='0.17.21',
+    version_timestamp='2022-02-12 09:49:22',
+    author='Anthon van der Neut',
+    author_email='a.van.der.neut@ruamel.eu',
+    description='ruamel.yaml is a YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order',  # NOQA
+    entry_points=None,
+    since=2014,
+    extras_require={
+        ':platform_python_implementation=="CPython" and python_version<"3.11"': ['ruamel.yaml.clib>=0.2.6'],  # NOQA
+        'jinja2': ['ruamel.yaml.jinja2>=0.2'],
+        'docs': ['ryd'],
+    },
+    classifiers=[
+        'Programming Language :: Python :: 3 :: Only',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: Implementation :: CPython',
+        'Topic :: Software Development :: Libraries :: Python Modules',
+        'Topic :: Text Processing :: Markup',
+        'Typing :: Typed',
+    ],
+    keywords='yaml 1.2 parser round-trip preserve quotes order config',
+    read_the_docs='yaml',
+    supported=[(3, 5)],  # minimum
+    tox=dict(
+        env='*f',  # f for 3.5
+        fl8excl='_test/lib',
+    ),
+    # universal=True,
+    python_requires='>=3',
+    rtfd='yaml',
+)  # type: Dict[Any, Any]
+
+
+version_info = _package_data['version_info']
+__version__ = _package_data['__version__']
+
+try:
+    from .cyaml import *  # NOQA
+
+    __with_libyaml__ = True
+except (ImportError, ValueError):  # for Jython
+    __with_libyaml__ = False
+
+from ruamel.yaml.main import *  # NOQA

lib/spack/external/_vendoring/ruamel/yaml/anchor.py

@@ -0,0 +1,20 @@
+# coding: utf-8
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List, Union, Optional, Iterator  # NOQA
+
+anchor_attrib = '_yaml_anchor'
+
+
+class Anchor:
+    __slots__ = 'value', 'always_dump'
+    attrib = anchor_attrib
+
+    def __init__(self):
+        # type: () -> None
+        self.value = None
+        self.always_dump = False
+
+    def __repr__(self):
+        # type: () -> Any
+        ad = ', (always dump)' if self.always_dump else ""
+        return 'Anchor({!r}{})'.format(self.value, ad)

lib/spack/external/_vendoring/ruamel/yaml/compat.py

@@ -0,0 +1,268 @@
+# coding: utf-8
+
+# partially from package six by Benjamin Peterson
+
+import sys
+import os
+import io
+import traceback
+from abc import abstractmethod
+import collections.abc
+
+
+# fmt: off
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List, Union, BinaryIO, IO, Text, Tuple  # NOQA
+    from typing import Optional  # NOQA
+# fmt: on
+
+_DEFAULT_YAML_VERSION = (1, 2)
+
+try:
+    from collections import OrderedDict
+except ImportError:
+    from ordereddict import OrderedDict  # type: ignore
+
+    # to get the right name import ... as ordereddict doesn't do that
+
+
+class ordereddict(OrderedDict):  # type: ignore
+    if not hasattr(OrderedDict, 'insert'):
+
+        def insert(self, pos, key, value):
+            # type: (int, Any, Any) -> None
+            if pos >= len(self):
+                self[key] = value
+                return
+            od = ordereddict()
+            od.update(self)
+            for k in od:
+                del self[k]
+            for index, old_key in enumerate(od):
+                if pos == index:
+                    self[key] = value
+                self[old_key] = od[old_key]
+
+
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+
+# replace with f-strings when 3.5 support is dropped
+# ft = '42'
+# assert _F('abc {ft!r}', ft=ft) == 'abc %r' % ft
+# 'abc %r' % ft -> _F('abc {ft!r}' -> f'abc {ft!r}'
+def _F(s, *superfluous, **kw):
+    # type: (Any, Any, Any) -> Any
+    if superfluous:
+        raise TypeError
+    return s.format(**kw)
+
+
+StringIO = io.StringIO
+BytesIO = io.BytesIO
+
+if False:  # MYPY
+    # StreamType = Union[BinaryIO, IO[str], IO[unicode],  StringIO]
+    # StreamType = Union[BinaryIO, IO[str], StringIO]  # type: ignore
+    StreamType = Any
+
+    StreamTextType = StreamType  # Union[Text, StreamType]
+    VersionType = Union[List[int], str, Tuple[int, int]]
+
+builtins_module = 'builtins'
+
+
+def with_metaclass(meta, *bases):
+    # type: (Any, Any) -> Any
+    """Create a base class with a metaclass."""
+    return meta('NewBase', bases, {})
+
+
+DBG_TOKEN = 1
+DBG_EVENT = 2
+DBG_NODE = 4
+
+
+_debug = None  # type: Optional[int]
+if 'RUAMELDEBUG' in os.environ:
+    _debugx = os.environ.get('RUAMELDEBUG')
+    if _debugx is None:
+        _debug = 0
+    else:
+        _debug = int(_debugx)
+
+
+if bool(_debug):
+
+    class ObjectCounter:
+        def __init__(self):
+            # type: () -> None
+            self.map = {}  # type: Dict[Any, Any]
+
+        def __call__(self, k):
+            # type: (Any) -> None
+            self.map[k] = self.map.get(k, 0) + 1
+
+        def dump(self):
+            # type: () -> None
+            for k in sorted(self.map):
+                sys.stdout.write('{} -> {}'.format(k, self.map[k]))
+
+    object_counter = ObjectCounter()
+
+
+# used from yaml util when testing
+def dbg(val=None):
+    # type: (Any) -> Any
+    global _debug
+    if _debug is None:
+        # set to true or false
+        _debugx = os.environ.get('YAMLDEBUG')
+        if _debugx is None:
+            _debug = 0
+        else:
+            _debug = int(_debugx)
+    if val is None:
+        return _debug
+    return _debug & val
+
+
+class Nprint:
+    def __init__(self, file_name=None):
+        # type: (Any) -> None
+        self._max_print = None  # type: Any
+        self._count = None  # type: Any
+        self._file_name = file_name
+
+    def __call__(self, *args, **kw):
+        # type: (Any, Any) -> None
+        if not bool(_debug):
+            return
+        out = sys.stdout if self._file_name is None else open(self._file_name, 'a')
+        dbgprint = print  # to fool checking for print statements by dv utility
+        kw1 = kw.copy()
+        kw1['file'] = out
+        dbgprint(*args, **kw1)
+        out.flush()
+        if self._max_print is not None:
+            if self._count is None:
+                self._count = self._max_print
+            self._count -= 1
+            if self._count == 0:
+                dbgprint('forced exit\n')
+                traceback.print_stack()
+                out.flush()
+                sys.exit(0)
+        if self._file_name:
+            out.close()
+
+    def set_max_print(self, i):
+        # type: (int) -> None
+        self._max_print = i
+        self._count = None
+
+    def fp(self, mode='a'):
+        # type: (str) -> Any
+        out = sys.stdout if self._file_name is None else open(self._file_name, mode)
+        return out
+
+
+nprint = Nprint()
+nprintf = Nprint('/var/tmp/ruamel.yaml.log')
+
+# char checkers following production rules
+
+
+def check_namespace_char(ch):
+    # type: (Any) -> bool
+    if '\x21' <= ch <= '\x7E':  # ! to ~
+        return True
+    if '\xA0' <= ch <= '\uD7FF':
+        return True
+    if ('\uE000' <= ch <= '\uFFFD') and ch != '\uFEFF':  # excl. byte order mark
+        return True
+    if '\U00010000' <= ch <= '\U0010FFFF':
+        return True
+    return False
+
+
+def check_anchorname_char(ch):
+    # type: (Any) -> bool
+    if ch in ',[]{}':
+        return False
+    return check_namespace_char(ch)
+
+
+def version_tnf(t1, t2=None):
+    # type: (Any, Any) -> Any
+    """
+    return True if ruamel.yaml version_info < t1, None if t2 is specified and bigger else False
+    """
+    from ruamel.yaml import version_info  # NOQA
+
+    if version_info < t1:
+        return True
+    if t2 is not None and version_info < t2:
+        return None
+    return False
+
+
+class MutableSliceableSequence(collections.abc.MutableSequence):  # type: ignore
+    __slots__ = ()
+
+    def __getitem__(self, index):
+        # type: (Any) -> Any
+        if not isinstance(index, slice):
+            return self.__getsingleitem__(index)
+        return type(self)([self[i] for i in range(*index.indices(len(self)))])  # type: ignore
+
+    def __setitem__(self, index, value):
+        # type: (Any, Any) -> None
+        if not isinstance(index, slice):
+            return self.__setsingleitem__(index, value)
+        assert iter(value)
+        # nprint(index.start, index.stop, index.step, index.indices(len(self)))
+        if index.step is None:
+            del self[index.start : index.stop]
+            for elem in reversed(value):
+                self.insert(0 if index.start is None else index.start, elem)
+        else:
+            range_parms = index.indices(len(self))
+            nr_assigned_items = (range_parms[1] - range_parms[0] - 1) // range_parms[2] + 1
+            # need to test before changing, in case TypeError is caught
+            if nr_assigned_items < len(value):
+                raise TypeError(
+                    'too many elements in value {} < {}'.format(nr_assigned_items, len(value))
+                )
+            elif nr_assigned_items > len(value):
+                raise TypeError(
+                    'not enough elements in value {} > {}'.format(
+                        nr_assigned_items, len(value)
+                    )
+                )
+            for idx, i in enumerate(range(*range_parms)):
+                self[i] = value[idx]
+
+    def __delitem__(self, index):
+        # type: (Any) -> None
+        if not isinstance(index, slice):
+            return self.__delsingleitem__(index)
+        # nprint(index.start, index.stop, index.step, index.indices(len(self)))
+        for i in reversed(range(*index.indices(len(self)))):
+            del self[i]
+
+    @abstractmethod
+    def __getsingleitem__(self, index):
+        # type: (Any) -> Any
+        raise IndexError
+
+    @abstractmethod
+    def __setsingleitem__(self, index, value):
+        # type: (Any, Any) -> None
+        raise IndexError
+
+    @abstractmethod
+    def __delsingleitem__(self, index):
+        # type: (Any) -> None
+        raise IndexError

lib/spack/external/_vendoring/ruamel/yaml/composer.py

@@ -0,0 +1,243 @@
+# coding: utf-8
+
+import warnings
+
+from ruamel.yaml.error import MarkedYAMLError, ReusedAnchorWarning
+from ruamel.yaml.compat import _F, nprint, nprintf  # NOQA
+
+from ruamel.yaml.events import (
+    StreamStartEvent,
+    StreamEndEvent,
+    MappingStartEvent,
+    MappingEndEvent,
+    SequenceStartEvent,
+    SequenceEndEvent,
+    AliasEvent,
+    ScalarEvent,
+)
+from ruamel.yaml.nodes import MappingNode, ScalarNode, SequenceNode
+
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List  # NOQA
+
+__all__ = ['Composer', 'ComposerError']
+
+
+class ComposerError(MarkedYAMLError):
+    pass
+
+
+class Composer:
+    def __init__(self, loader=None):
+        # type: (Any) -> None
+        self.loader = loader
+        if self.loader is not None and getattr(self.loader, '_composer', None) is None:
+            self.loader._composer = self
+        self.anchors = {}  # type: Dict[Any, Any]
+
+    @property
+    def parser(self):
+        # type: () -> Any
+        if hasattr(self.loader, 'typ'):
+            self.loader.parser
+        return self.loader._parser
+
+    @property
+    def resolver(self):
+        # type: () -> Any
+        # assert self.loader._resolver is not None
+        if hasattr(self.loader, 'typ'):
+            self.loader.resolver
+        return self.loader._resolver
+
+    def check_node(self):
+        # type: () -> Any
+        # Drop the STREAM-START event.
+        if self.parser.check_event(StreamStartEvent):
+            self.parser.get_event()
+
+        # If there are more documents available?
+        return not self.parser.check_event(StreamEndEvent)
+
+    def get_node(self):
+        # type: () -> Any
+        # Get the root node of the next document.
+        if not self.parser.check_event(StreamEndEvent):
+            return self.compose_document()
+
+    def get_single_node(self):
+        # type: () -> Any
+        # Drop the STREAM-START event.
+        self.parser.get_event()
+
+        # Compose a document if the stream is not empty.
+        document = None  # type: Any
+        if not self.parser.check_event(StreamEndEvent):
+            document = self.compose_document()
+
+        # Ensure that the stream contains no more documents.
+        if not self.parser.check_event(StreamEndEvent):
+            event = self.parser.get_event()
+            raise ComposerError(
+                'expected a single document in the stream',
+                document.start_mark,
+                'but found another document',
+                event.start_mark,
+            )
+
+        # Drop the STREAM-END event.
+        self.parser.get_event()
+
+        return document
+
+    def compose_document(self):
+        # type: (Any) -> Any
+        # Drop the DOCUMENT-START event.
+        self.parser.get_event()
+
+        # Compose the root node.
+        node = self.compose_node(None, None)
+
+        # Drop the DOCUMENT-END event.
+        self.parser.get_event()
+
+        self.anchors = {}
+        return node
+
+    def return_alias(self, a):
+        # type: (Any) -> Any
+        return a
+
+    def compose_node(self, parent, index):
+        # type: (Any, Any) -> Any
+        if self.parser.check_event(AliasEvent):
+            event = self.parser.get_event()
+            alias = event.anchor
+            if alias not in self.anchors:
+                raise ComposerError(
+                    None,
+                    None,
+                    _F('found undefined alias {alias!r}', alias=alias),
+                    event.start_mark,
+                )
+            return self.return_alias(self.anchors[alias])
+        event = self.parser.peek_event()
+        anchor = event.anchor
+        if anchor is not None:  # have an anchor
+            if anchor in self.anchors:
+                # raise ComposerError(
+                #     "found duplicate anchor %r; first occurrence"
+                #     % (anchor), self.anchors[anchor].start_mark,
+                #     "second occurrence", event.start_mark)
+                ws = (
+                    '\nfound duplicate anchor {!r}\nfirst occurrence {}\nsecond occurrence '
+                    '{}'.format((anchor), self.anchors[anchor].start_mark, event.start_mark)
+                )
+                warnings.warn(ws, ReusedAnchorWarning)
+        self.resolver.descend_resolver(parent, index)
+        if self.parser.check_event(ScalarEvent):
+            node = self.compose_scalar_node(anchor)
+        elif self.parser.check_event(SequenceStartEvent):
+            node = self.compose_sequence_node(anchor)
+        elif self.parser.check_event(MappingStartEvent):
+            node = self.compose_mapping_node(anchor)
+        self.resolver.ascend_resolver()
+        return node
+
+    def compose_scalar_node(self, anchor):
+        # type: (Any) -> Any
+        event = self.parser.get_event()
+        tag = event.tag
+        if tag is None or tag == '!':
+            tag = self.resolver.resolve(ScalarNode, event.value, event.implicit)
+        node = ScalarNode(
+            tag,
+            event.value,
+            event.start_mark,
+            event.end_mark,
+            style=event.style,
+            comment=event.comment,
+            anchor=anchor,
+        )
+        if anchor is not None:
+            self.anchors[anchor] = node
+        return node
+
+    def compose_sequence_node(self, anchor):
+        # type: (Any) -> Any
+        start_event = self.parser.get_event()
+        tag = start_event.tag
+        if tag is None or tag == '!':
+            tag = self.resolver.resolve(SequenceNode, None, start_event.implicit)
+        node = SequenceNode(
+            tag,
+            [],
+            start_event.start_mark,
+            None,
+            flow_style=start_event.flow_style,
+            comment=start_event.comment,
+            anchor=anchor,
+        )
+        if anchor is not None:
+            self.anchors[anchor] = node
+        index = 0
+        while not self.parser.check_event(SequenceEndEvent):
+            node.value.append(self.compose_node(node, index))
+            index += 1
+        end_event = self.parser.get_event()
+        if node.flow_style is True and end_event.comment is not None:
+            if node.comment is not None:
+                nprint(
+                    'Warning: unexpected end_event commment in sequence '
+                    'node {}'.format(node.flow_style)
+                )
+            node.comment = end_event.comment
+        node.end_mark = end_event.end_mark
+        self.check_end_doc_comment(end_event, node)
+        return node
+
+    def compose_mapping_node(self, anchor):
+        # type: (Any) -> Any
+        start_event = self.parser.get_event()
+        tag = start_event.tag
+        if tag is None or tag == '!':
+            tag = self.resolver.resolve(MappingNode, None, start_event.implicit)
+        node = MappingNode(
+            tag,
+            [],
+            start_event.start_mark,
+            None,
+            flow_style=start_event.flow_style,
+            comment=start_event.comment,
+            anchor=anchor,
+        )
+        if anchor is not None:
+            self.anchors[anchor] = node
+        while not self.parser.check_event(MappingEndEvent):
+            # key_event = self.parser.peek_event()
+            item_key = self.compose_node(node, None)
+            # if item_key in node.value:
+            #     raise ComposerError("while composing a mapping",
+            #             start_event.start_mark,
+            #             "found duplicate key", key_event.start_mark)
+            item_value = self.compose_node(node, item_key)
+            # node.value[item_key] = item_value
+            node.value.append((item_key, item_value))
+        end_event = self.parser.get_event()
+        if node.flow_style is True and end_event.comment is not None:
+            node.comment = end_event.comment
+        node.end_mark = end_event.end_mark
+        self.check_end_doc_comment(end_event, node)
+        return node
+
+    def check_end_doc_comment(self, end_event, node):
+        # type: (Any, Any) -> None
+        if end_event.comment and end_event.comment[1]:
+            # pre comments on an end_event, no following to move to
+            if node.comment is None:
+                node.comment = [None, None]
+            assert not isinstance(node, ScalarEvent)
+            # this is a post comment on a mapping node, add as third element
+            # in the list
+            node.comment.append(end_event.comment[1])
+            end_event.comment[1] = None

lib/spack/external/_vendoring/ruamel/yaml/configobjwalker.py

@@ -0,0 +1,14 @@
+# coding: utf-8
+
+import warnings
+
+from ruamel.yaml.util import configobj_walker as new_configobj_walker
+
+if False:  # MYPY
+    from typing import Any  # NOQA
+
+
+def configobj_walker(cfg):
+    # type: (Any) -> Any
+    warnings.warn('configobj_walker has moved to ruamel.yaml.util, please update your code')
+    return new_configobj_walker(cfg)

lib/spack/external/_vendoring/ruamel/yaml/cyaml.py

@@ -0,0 +1,183 @@
+# coding: utf-8
+
+from _ruamel_yaml import CParser, CEmitter  # type: ignore
+
+from ruamel.yaml.constructor import Constructor, BaseConstructor, SafeConstructor
+from ruamel.yaml.representer import Representer, SafeRepresenter, BaseRepresenter
+from ruamel.yaml.resolver import Resolver, BaseResolver
+
+if False:  # MYPY
+    from typing import Any, Union, Optional  # NOQA
+    from ruamel.yaml.compat import StreamTextType, StreamType, VersionType  # NOQA
+
+__all__ = ['CBaseLoader', 'CSafeLoader', 'CLoader', 'CBaseDumper', 'CSafeDumper', 'CDumper']
+
+
+# this includes some hacks to solve the  usage of resolver by lower level
+# parts of the parser
+
+
+class CBaseLoader(CParser, BaseConstructor, BaseResolver):  # type: ignore
+    def __init__(self, stream, version=None, preserve_quotes=None):
+        # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> None
+        CParser.__init__(self, stream)
+        self._parser = self._composer = self
+        BaseConstructor.__init__(self, loader=self)
+        BaseResolver.__init__(self, loadumper=self)
+        # self.descend_resolver = self._resolver.descend_resolver
+        # self.ascend_resolver = self._resolver.ascend_resolver
+        # self.resolve = self._resolver.resolve
+
+
+class CSafeLoader(CParser, SafeConstructor, Resolver):  # type: ignore
+    def __init__(self, stream, version=None, preserve_quotes=None):
+        # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> None
+        CParser.__init__(self, stream)
+        self._parser = self._composer = self
+        SafeConstructor.__init__(self, loader=self)
+        Resolver.__init__(self, loadumper=self)
+        # self.descend_resolver = self._resolver.descend_resolver
+        # self.ascend_resolver = self._resolver.ascend_resolver
+        # self.resolve = self._resolver.resolve
+
+
+class CLoader(CParser, Constructor, Resolver):  # type: ignore
+    def __init__(self, stream, version=None, preserve_quotes=None):
+        # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> None
+        CParser.__init__(self, stream)
+        self._parser = self._composer = self
+        Constructor.__init__(self, loader=self)
+        Resolver.__init__(self, loadumper=self)
+        # self.descend_resolver = self._resolver.descend_resolver
+        # self.ascend_resolver = self._resolver.ascend_resolver
+        # self.resolve = self._resolver.resolve
+
+
+class CBaseDumper(CEmitter, BaseRepresenter, BaseResolver):  # type: ignore
+    def __init__(
+        self,
+        stream,
+        default_style=None,
+        default_flow_style=None,
+        canonical=None,
+        indent=None,
+        width=None,
+        allow_unicode=None,
+        line_break=None,
+        encoding=None,
+        explicit_start=None,
+        explicit_end=None,
+        version=None,
+        tags=None,
+        block_seq_indent=None,
+        top_level_colon_align=None,
+        prefix_colon=None,
+    ):
+        # type: (StreamType, Any, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Any, Any, Any, Any, Any) -> None   # NOQA
+        CEmitter.__init__(
+            self,
+            stream,
+            canonical=canonical,
+            indent=indent,
+            width=width,
+            encoding=encoding,
+            allow_unicode=allow_unicode,
+            line_break=line_break,
+            explicit_start=explicit_start,
+            explicit_end=explicit_end,
+            version=version,
+            tags=tags,
+        )
+        self._emitter = self._serializer = self._representer = self
+        BaseRepresenter.__init__(
+            self,
+            default_style=default_style,
+            default_flow_style=default_flow_style,
+            dumper=self,
+        )
+        BaseResolver.__init__(self, loadumper=self)
+
+
+class CSafeDumper(CEmitter, SafeRepresenter, Resolver):  # type: ignore
+    def __init__(
+        self,
+        stream,
+        default_style=None,
+        default_flow_style=None,
+        canonical=None,
+        indent=None,
+        width=None,
+        allow_unicode=None,
+        line_break=None,
+        encoding=None,
+        explicit_start=None,
+        explicit_end=None,
+        version=None,
+        tags=None,
+        block_seq_indent=None,
+        top_level_colon_align=None,
+        prefix_colon=None,
+    ):
+        # type: (StreamType, Any, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Any, Any, Any, Any, Any) -> None   # NOQA
+        self._emitter = self._serializer = self._representer = self
+        CEmitter.__init__(
+            self,
+            stream,
+            canonical=canonical,
+            indent=indent,
+            width=width,
+            encoding=encoding,
+            allow_unicode=allow_unicode,
+            line_break=line_break,
+            explicit_start=explicit_start,
+            explicit_end=explicit_end,
+            version=version,
+            tags=tags,
+        )
+        self._emitter = self._serializer = self._representer = self
+        SafeRepresenter.__init__(
+            self, default_style=default_style, default_flow_style=default_flow_style
+        )
+        Resolver.__init__(self)
+
+
+class CDumper(CEmitter, Representer, Resolver):  # type: ignore
+    def __init__(
+        self,
+        stream,
+        default_style=None,
+        default_flow_style=None,
+        canonical=None,
+        indent=None,
+        width=None,
+        allow_unicode=None,
+        line_break=None,
+        encoding=None,
+        explicit_start=None,
+        explicit_end=None,
+        version=None,
+        tags=None,
+        block_seq_indent=None,
+        top_level_colon_align=None,
+        prefix_colon=None,
+    ):
+        # type: (StreamType, Any, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Any, Any, Any, Any, Any) -> None   # NOQA
+        CEmitter.__init__(
+            self,
+            stream,
+            canonical=canonical,
+            indent=indent,
+            width=width,
+            encoding=encoding,
+            allow_unicode=allow_unicode,
+            line_break=line_break,
+            explicit_start=explicit_start,
+            explicit_end=explicit_end,
+            version=version,
+            tags=tags,
+        )
+        self._emitter = self._serializer = self._representer = self
+        Representer.__init__(
+            self, default_style=default_style, default_flow_style=default_flow_style
+        )
+        Resolver.__init__(self)

lib/spack/external/_vendoring/ruamel/yaml/dumper.py

@@ -0,0 +1,219 @@
+# coding: utf-8
+
+from ruamel.yaml.emitter import Emitter
+from ruamel.yaml.serializer import Serializer
+from ruamel.yaml.representer import (
+    Representer,
+    SafeRepresenter,
+    BaseRepresenter,
+    RoundTripRepresenter,
+)
+from ruamel.yaml.resolver import Resolver, BaseResolver, VersionedResolver
+
+if False:  # MYPY
+    from typing import Any, Dict, List, Union, Optional  # NOQA
+    from ruamel.yaml.compat import StreamType, VersionType  # NOQA
+
+__all__ = ['BaseDumper', 'SafeDumper', 'Dumper', 'RoundTripDumper']
+
+
+class BaseDumper(Emitter, Serializer, BaseRepresenter, BaseResolver):
+    def __init__(
+        self,
+        stream,
+        default_style=None,
+        default_flow_style=None,
+        canonical=None,
+        indent=None,
+        width=None,
+        allow_unicode=None,
+        line_break=None,
+        encoding=None,
+        explicit_start=None,
+        explicit_end=None,
+        version=None,
+        tags=None,
+        block_seq_indent=None,
+        top_level_colon_align=None,
+        prefix_colon=None,
+    ):
+        # type: (Any, StreamType, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Any, Any, Any, Any, Any) -> None   # NOQA
+        Emitter.__init__(
+            self,
+            stream,
+            canonical=canonical,
+            indent=indent,
+            width=width,
+            allow_unicode=allow_unicode,
+            line_break=line_break,
+            block_seq_indent=block_seq_indent,
+            dumper=self,
+        )
+        Serializer.__init__(
+            self,
+            encoding=encoding,
+            explicit_start=explicit_start,
+            explicit_end=explicit_end,
+            version=version,
+            tags=tags,
+            dumper=self,
+        )
+        BaseRepresenter.__init__(
+            self,
+            default_style=default_style,
+            default_flow_style=default_flow_style,
+            dumper=self,
+        )
+        BaseResolver.__init__(self, loadumper=self)
+
+
+class SafeDumper(Emitter, Serializer, SafeRepresenter, Resolver):
+    def __init__(
+        self,
+        stream,
+        default_style=None,
+        default_flow_style=None,
+        canonical=None,
+        indent=None,
+        width=None,
+        allow_unicode=None,
+        line_break=None,
+        encoding=None,
+        explicit_start=None,
+        explicit_end=None,
+        version=None,
+        tags=None,
+        block_seq_indent=None,
+        top_level_colon_align=None,
+        prefix_colon=None,
+    ):
+        # type: (StreamType, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Any, Any, Any, Any, Any) -> None  # NOQA
+        Emitter.__init__(
+            self,
+            stream,
+            canonical=canonical,
+            indent=indent,
+            width=width,
+            allow_unicode=allow_unicode,
+            line_break=line_break,
+            block_seq_indent=block_seq_indent,
+            dumper=self,
+        )
+        Serializer.__init__(
+            self,
+            encoding=encoding,
+            explicit_start=explicit_start,
+            explicit_end=explicit_end,
+            version=version,
+            tags=tags,
+            dumper=self,
+        )
+        SafeRepresenter.__init__(
+            self,
+            default_style=default_style,
+            default_flow_style=default_flow_style,
+            dumper=self,
+        )
+        Resolver.__init__(self, loadumper=self)
+
+
+class Dumper(Emitter, Serializer, Representer, Resolver):
+    def __init__(
+        self,
+        stream,
+        default_style=None,
+        default_flow_style=None,
+        canonical=None,
+        indent=None,
+        width=None,
+        allow_unicode=None,
+        line_break=None,
+        encoding=None,
+        explicit_start=None,
+        explicit_end=None,
+        version=None,
+        tags=None,
+        block_seq_indent=None,
+        top_level_colon_align=None,
+        prefix_colon=None,
+    ):
+        # type: (StreamType, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Any, Any, Any, Any, Any) -> None   # NOQA
+        Emitter.__init__(
+            self,
+            stream,
+            canonical=canonical,
+            indent=indent,
+            width=width,
+            allow_unicode=allow_unicode,
+            line_break=line_break,
+            block_seq_indent=block_seq_indent,
+            dumper=self,
+        )
+        Serializer.__init__(
+            self,
+            encoding=encoding,
+            explicit_start=explicit_start,
+            explicit_end=explicit_end,
+            version=version,
+            tags=tags,
+            dumper=self,
+        )
+        Representer.__init__(
+            self,
+            default_style=default_style,
+            default_flow_style=default_flow_style,
+            dumper=self,
+        )
+        Resolver.__init__(self, loadumper=self)
+
+
+class RoundTripDumper(Emitter, Serializer, RoundTripRepresenter, VersionedResolver):
+    def __init__(
+        self,
+        stream,
+        default_style=None,
+        default_flow_style=None,
+        canonical=None,
+        indent=None,
+        width=None,
+        allow_unicode=None,
+        line_break=None,
+        encoding=None,
+        explicit_start=None,
+        explicit_end=None,
+        version=None,
+        tags=None,
+        block_seq_indent=None,
+        top_level_colon_align=None,
+        prefix_colon=None,
+    ):
+        # type: (StreamType, Any, Optional[bool], Optional[int], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Any, Any, Any, Any, Any) -> None  # NOQA
+        Emitter.__init__(
+            self,
+            stream,
+            canonical=canonical,
+            indent=indent,
+            width=width,
+            allow_unicode=allow_unicode,
+            line_break=line_break,
+            block_seq_indent=block_seq_indent,
+            top_level_colon_align=top_level_colon_align,
+            prefix_colon=prefix_colon,
+            dumper=self,
+        )
+        Serializer.__init__(
+            self,
+            encoding=encoding,
+            explicit_start=explicit_start,
+            explicit_end=explicit_end,
+            version=version,
+            tags=tags,
+            dumper=self,
+        )
+        RoundTripRepresenter.__init__(
+            self,
+            default_style=default_style,
+            default_flow_style=default_flow_style,
+            dumper=self,
+        )
+        VersionedResolver.__init__(self, loader=self)

lib/spack/external/_vendoring/ruamel/yaml/error.py

@@ -0,0 +1,332 @@
+# coding: utf-8
+
+import warnings
+import textwrap
+
+from ruamel.yaml.compat import _F
+
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List, Text  # NOQA
+
+
+__all__ = [
+    'FileMark',
+    'StringMark',
+    'CommentMark',
+    'YAMLError',
+    'MarkedYAMLError',
+    'ReusedAnchorWarning',
+    'UnsafeLoaderWarning',
+    'MarkedYAMLWarning',
+    'MarkedYAMLFutureWarning',
+]
+
+
+class StreamMark:
+    __slots__ = 'name', 'index', 'line', 'column'
+
+    def __init__(self, name, index, line, column):
+        # type: (Any, int, int, int) -> None
+        self.name = name
+        self.index = index
+        self.line = line
+        self.column = column
+
+    def __str__(self):
+        # type: () -> Any
+        where = _F(
+            '  in "{sname!s}", line {sline1:d}, column {scolumn1:d}',
+            sname=self.name,
+            sline1=self.line + 1,
+            scolumn1=self.column + 1,
+        )
+        return where
+
+    def __eq__(self, other):
+        # type: (Any) -> bool
+        if self.line != other.line or self.column != other.column:
+            return False
+        if self.name != other.name or self.index != other.index:
+            return False
+        return True
+
+    def __ne__(self, other):
+        # type: (Any) -> bool
+        return not self.__eq__(other)
+
+
+class FileMark(StreamMark):
+    __slots__ = ()
+
+
+class StringMark(StreamMark):
+    __slots__ = 'name', 'index', 'line', 'column', 'buffer', 'pointer'
+
+    def __init__(self, name, index, line, column, buffer, pointer):
+        # type: (Any, int, int, int, Any, Any) -> None
+        StreamMark.__init__(self, name, index, line, column)
+        self.buffer = buffer
+        self.pointer = pointer
+
+    def get_snippet(self, indent=4, max_length=75):
+        # type: (int, int) -> Any
+        if self.buffer is None:  # always False
+            return None
+        head = ""
+        start = self.pointer
+        while start > 0 and self.buffer[start - 1] not in '\0\r\n\x85\u2028\u2029':
+            start -= 1
+            if self.pointer - start > max_length / 2 - 1:
+                head = ' ... '
+                start += 5
+                break
+        tail = ""
+        end = self.pointer
+        while end < len(self.buffer) and self.buffer[end] not in '\0\r\n\x85\u2028\u2029':
+            end += 1
+            if end - self.pointer > max_length / 2 - 1:
+                tail = ' ... '
+                end -= 5
+                break
+        snippet = self.buffer[start:end]
+        caret = '^'
+        caret = '^ (line: {})'.format(self.line + 1)
+        return (
+            ' ' * indent
+            + head
+            + snippet
+            + tail
+            + '\n'
+            + ' ' * (indent + self.pointer - start + len(head))
+            + caret
+        )
+
+    def __str__(self):
+        # type: () -> Any
+        snippet = self.get_snippet()
+        where = _F(
+            '  in "{sname!s}", line {sline1:d}, column {scolumn1:d}',
+            sname=self.name,
+            sline1=self.line + 1,
+            scolumn1=self.column + 1,
+        )
+        if snippet is not None:
+            where += ':\n' + snippet
+        return where
+
+    def __repr__(self):
+        # type: () -> Any
+        snippet = self.get_snippet()
+        where = _F(
+            '  in "{sname!s}", line {sline1:d}, column {scolumn1:d}',
+            sname=self.name,
+            sline1=self.line + 1,
+            scolumn1=self.column + 1,
+        )
+        if snippet is not None:
+            where += ':\n' + snippet
+        return where
+
+
+class CommentMark:
+    __slots__ = ('column',)
+
+    def __init__(self, column):
+        # type: (Any) -> None
+        self.column = column
+
+
+class YAMLError(Exception):
+    pass
+
+
+class MarkedYAMLError(YAMLError):
+    def __init__(
+        self,
+        context=None,
+        context_mark=None,
+        problem=None,
+        problem_mark=None,
+        note=None,
+        warn=None,
+    ):
+        # type: (Any, Any, Any, Any, Any, Any) -> None
+        self.context = context
+        self.context_mark = context_mark
+        self.problem = problem
+        self.problem_mark = problem_mark
+        self.note = note
+        # warn is ignored
+
+    def __str__(self):
+        # type: () -> Any
+        lines = []  # type: List[str]
+        if self.context is not None:
+            lines.append(self.context)
+        if self.context_mark is not None and (
+            self.problem is None
+            or self.problem_mark is None
+            or self.context_mark.name != self.problem_mark.name
+            or self.context_mark.line != self.problem_mark.line
+            or self.context_mark.column != self.problem_mark.column
+        ):
+            lines.append(str(self.context_mark))
+        if self.problem is not None:
+            lines.append(self.problem)
+        if self.problem_mark is not None:
+            lines.append(str(self.problem_mark))
+        if self.note is not None and self.note:
+            note = textwrap.dedent(self.note)
+            lines.append(note)
+        return '\n'.join(lines)
+
+
+class YAMLStreamError(Exception):
+    pass
+
+
+class YAMLWarning(Warning):
+    pass
+
+
+class MarkedYAMLWarning(YAMLWarning):
+    def __init__(
+        self,
+        context=None,
+        context_mark=None,
+        problem=None,
+        problem_mark=None,
+        note=None,
+        warn=None,
+    ):
+        # type: (Any, Any, Any, Any, Any, Any) -> None
+        self.context = context
+        self.context_mark = context_mark
+        self.problem = problem
+        self.problem_mark = problem_mark
+        self.note = note
+        self.warn = warn
+
+    def __str__(self):
+        # type: () -> Any
+        lines = []  # type: List[str]
+        if self.context is not None:
+            lines.append(self.context)
+        if self.context_mark is not None and (
+            self.problem is None
+            or self.problem_mark is None
+            or self.context_mark.name != self.problem_mark.name
+            or self.context_mark.line != self.problem_mark.line
+            or self.context_mark.column != self.problem_mark.column
+        ):
+            lines.append(str(self.context_mark))
+        if self.problem is not None:
+            lines.append(self.problem)
+        if self.problem_mark is not None:
+            lines.append(str(self.problem_mark))
+        if self.note is not None and self.note:
+            note = textwrap.dedent(self.note)
+            lines.append(note)
+        if self.warn is not None and self.warn:
+            warn = textwrap.dedent(self.warn)
+            lines.append(warn)
+        return '\n'.join(lines)
+
+
+class ReusedAnchorWarning(YAMLWarning):
+    pass
+
+
+class UnsafeLoaderWarning(YAMLWarning):
+    text = """
+The default 'Loader' for 'load(stream)' without further arguments can be unsafe.
+Use 'load(stream, Loader=ruamel.yaml.Loader)' explicitly if that is OK.
+Alternatively include the following in your code:
+
+  import warnings
+  warnings.simplefilter('ignore', ruamel.yaml.error.UnsafeLoaderWarning)
+
+In most other cases you should consider using 'safe_load(stream)'"""
+    pass
+
+
+warnings.simplefilter('once', UnsafeLoaderWarning)
+
+
+class MantissaNoDotYAML1_1Warning(YAMLWarning):
+    def __init__(self, node, flt_str):
+        # type: (Any, Any) -> None
+        self.node = node
+        self.flt = flt_str
+
+    def __str__(self):
+        # type: () -> Any
+        line = self.node.start_mark.line
+        col = self.node.start_mark.column
+        return """
+In YAML 1.1 floating point values should have a dot ('.') in their mantissa.
+See the Floating-Point Language-Independent Type for YAML™ Version 1.1 specification
+( http://yaml.org/type/float.html ). This dot is not required for JSON nor for YAML 1.2
+
+Correct your float: "{}" on line: {}, column: {}
+
+or alternatively include the following in your code:
+
+  import warnings
+  warnings.simplefilter('ignore', ruamel.yaml.error.MantissaNoDotYAML1_1Warning)
+
+""".format(
+            self.flt, line, col
+        )
+
+
+warnings.simplefilter('once', MantissaNoDotYAML1_1Warning)
+
+
+class YAMLFutureWarning(Warning):
+    pass
+
+
+class MarkedYAMLFutureWarning(YAMLFutureWarning):
+    def __init__(
+        self,
+        context=None,
+        context_mark=None,
+        problem=None,
+        problem_mark=None,
+        note=None,
+        warn=None,
+    ):
+        # type: (Any, Any, Any, Any, Any, Any) -> None
+        self.context = context
+        self.context_mark = context_mark
+        self.problem = problem
+        self.problem_mark = problem_mark
+        self.note = note
+        self.warn = warn
+
+    def __str__(self):
+        # type: () -> Any
+        lines = []  # type: List[str]
+        if self.context is not None:
+            lines.append(self.context)
+
+        if self.context_mark is not None and (
+            self.problem is None
+            or self.problem_mark is None
+            or self.context_mark.name != self.problem_mark.name
+            or self.context_mark.line != self.problem_mark.line
+            or self.context_mark.column != self.problem_mark.column
+        ):
+            lines.append(str(self.context_mark))
+        if self.problem is not None:
+            lines.append(self.problem)
+        if self.problem_mark is not None:
+            lines.append(str(self.problem_mark))
+        if self.note is not None and self.note:
+            note = textwrap.dedent(self.note)
+            lines.append(note)
+        if self.warn is not None and self.warn:
+            warn = textwrap.dedent(self.warn)
+            lines.append(warn)
+        return '\n'.join(lines)

lib/spack/external/_vendoring/ruamel/yaml/events.py

@@ -0,0 +1,196 @@
+# coding: utf-8
+
+from ruamel.yaml.compat import _F
+
+# Abstract classes.
+
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List  # NOQA
+
+SHOW_LINES = False
+
+
+def CommentCheck():
+    # type: () -> None
+    pass
+
+
+class Event:
+    __slots__ = 'start_mark', 'end_mark', 'comment'
+
+    def __init__(self, start_mark=None, end_mark=None, comment=CommentCheck):
+        # type: (Any, Any, Any) -> None
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        # assert comment is not CommentCheck
+        if comment is CommentCheck:
+            comment = None
+        self.comment = comment
+
+    def __repr__(self):
+        # type: () -> Any
+        if True:
+            arguments = []
+            if hasattr(self, 'value'):
+                # if you use repr(getattr(self, 'value')) then flake8 complains about
+                # abuse of getattr with a constant. When you change to self.value
+                # then mypy throws an error
+                arguments.append(repr(self.value))  # type: ignore
+            for key in ['anchor', 'tag', 'implicit', 'flow_style', 'style']:
+                v = getattr(self, key, None)
+                if v is not None:
+                    arguments.append(_F('{key!s}={v!r}', key=key, v=v))
+            if self.comment not in [None, CommentCheck]:
+                arguments.append('comment={!r}'.format(self.comment))
+            if SHOW_LINES:
+                arguments.append(
+                    '({}:{}/{}:{})'.format(
+                        self.start_mark.line,
+                        self.start_mark.column,
+                        self.end_mark.line,
+                        self.end_mark.column,
+                    )
+                )
+            arguments = ', '.join(arguments)  # type: ignore
+        else:
+            attributes = [
+                key
+                for key in ['anchor', 'tag', 'implicit', 'value', 'flow_style', 'style']
+                if hasattr(self, key)
+            ]
+            arguments = ', '.join(
+                [_F('{k!s}={attr!r}', k=key, attr=getattr(self, key)) for key in attributes]
+            )
+            if self.comment not in [None, CommentCheck]:
+                arguments += ', comment={!r}'.format(self.comment)
+        return _F(
+            '{self_class_name!s}({arguments!s})',
+            self_class_name=self.__class__.__name__,
+            arguments=arguments,
+        )
+
+
+class NodeEvent(Event):
+    __slots__ = ('anchor',)
+
+    def __init__(self, anchor, start_mark=None, end_mark=None, comment=None):
+        # type: (Any, Any, Any, Any) -> None
+        Event.__init__(self, start_mark, end_mark, comment)
+        self.anchor = anchor
+
+
+class CollectionStartEvent(NodeEvent):
+    __slots__ = 'tag', 'implicit', 'flow_style', 'nr_items'
+
+    def __init__(
+        self,
+        anchor,
+        tag,
+        implicit,
+        start_mark=None,
+        end_mark=None,
+        flow_style=None,
+        comment=None,
+        nr_items=None,
+    ):
+        # type: (Any, Any, Any, Any, Any, Any, Any, Optional[int]) -> None
+        NodeEvent.__init__(self, anchor, start_mark, end_mark, comment)
+        self.tag = tag
+        self.implicit = implicit
+        self.flow_style = flow_style
+        self.nr_items = nr_items
+
+
+class CollectionEndEvent(Event):
+    __slots__ = ()
+
+
+# Implementations.
+
+
+class StreamStartEvent(Event):
+    __slots__ = ('encoding',)
+
+    def __init__(self, start_mark=None, end_mark=None, encoding=None, comment=None):
+        # type: (Any, Any, Any, Any) -> None
+        Event.__init__(self, start_mark, end_mark, comment)
+        self.encoding = encoding
+
+
+class StreamEndEvent(Event):
+    __slots__ = ()
+
+
+class DocumentStartEvent(Event):
+    __slots__ = 'explicit', 'version', 'tags'
+
+    def __init__(
+        self,
+        start_mark=None,
+        end_mark=None,
+        explicit=None,
+        version=None,
+        tags=None,
+        comment=None,
+    ):
+        # type: (Any, Any, Any, Any, Any, Any) -> None
+        Event.__init__(self, start_mark, end_mark, comment)
+        self.explicit = explicit
+        self.version = version
+        self.tags = tags
+
+
+class DocumentEndEvent(Event):
+    __slots__ = ('explicit',)
+
+    def __init__(self, start_mark=None, end_mark=None, explicit=None, comment=None):
+        # type: (Any, Any, Any, Any) -> None
+        Event.__init__(self, start_mark, end_mark, comment)
+        self.explicit = explicit
+
+
+class AliasEvent(NodeEvent):
+    __slots__ = 'style'
+
+    def __init__(self, anchor, start_mark=None, end_mark=None, style=None, comment=None):
+        # type: (Any, Any, Any, Any, Any) -> None
+        NodeEvent.__init__(self, anchor, start_mark, end_mark, comment)
+        self.style = style
+
+
+class ScalarEvent(NodeEvent):
+    __slots__ = 'tag', 'implicit', 'value', 'style'
+
+    def __init__(
+        self,
+        anchor,
+        tag,
+        implicit,
+        value,
+        start_mark=None,
+        end_mark=None,
+        style=None,
+        comment=None,
+    ):
+        # type: (Any, Any, Any, Any, Any, Any, Any, Any) -> None
+        NodeEvent.__init__(self, anchor, start_mark, end_mark, comment)
+        self.tag = tag
+        self.implicit = implicit
+        self.value = value
+        self.style = style
+
+
+class SequenceStartEvent(CollectionStartEvent):
+    __slots__ = ()
+
+
+class SequenceEndEvent(CollectionEndEvent):
+    __slots__ = ()
+
+
+class MappingStartEvent(CollectionStartEvent):
+    __slots__ = ()
+
+
+class MappingEndEvent(CollectionEndEvent):
+    __slots__ = ()

lib/spack/external/_vendoring/ruamel/yaml/loader.py

@@ -0,0 +1,75 @@
+# coding: utf-8
+
+from ruamel.yaml.reader import Reader
+from ruamel.yaml.scanner import Scanner, RoundTripScanner
+from ruamel.yaml.parser import Parser, RoundTripParser
+from ruamel.yaml.composer import Composer
+from ruamel.yaml.constructor import (
+    BaseConstructor,
+    SafeConstructor,
+    Constructor,
+    RoundTripConstructor,
+)
+from ruamel.yaml.resolver import VersionedResolver
+
+if False:  # MYPY
+    from typing import Any, Dict, List, Union, Optional  # NOQA
+    from ruamel.yaml.compat import StreamTextType, VersionType  # NOQA
+
+__all__ = ['BaseLoader', 'SafeLoader', 'Loader', 'RoundTripLoader']
+
+
+class BaseLoader(Reader, Scanner, Parser, Composer, BaseConstructor, VersionedResolver):
+    def __init__(self, stream, version=None, preserve_quotes=None):
+        # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> None
+        self.comment_handling = None
+        Reader.__init__(self, stream, loader=self)
+        Scanner.__init__(self, loader=self)
+        Parser.__init__(self, loader=self)
+        Composer.__init__(self, loader=self)
+        BaseConstructor.__init__(self, loader=self)
+        VersionedResolver.__init__(self, version, loader=self)
+
+
+class SafeLoader(Reader, Scanner, Parser, Composer, SafeConstructor, VersionedResolver):
+    def __init__(self, stream, version=None, preserve_quotes=None):
+        # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> None
+        self.comment_handling = None
+        Reader.__init__(self, stream, loader=self)
+        Scanner.__init__(self, loader=self)
+        Parser.__init__(self, loader=self)
+        Composer.__init__(self, loader=self)
+        SafeConstructor.__init__(self, loader=self)
+        VersionedResolver.__init__(self, version, loader=self)
+
+
+class Loader(Reader, Scanner, Parser, Composer, Constructor, VersionedResolver):
+    def __init__(self, stream, version=None, preserve_quotes=None):
+        # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> None
+        self.comment_handling = None
+        Reader.__init__(self, stream, loader=self)
+        Scanner.__init__(self, loader=self)
+        Parser.__init__(self, loader=self)
+        Composer.__init__(self, loader=self)
+        Constructor.__init__(self, loader=self)
+        VersionedResolver.__init__(self, version, loader=self)
+
+
+class RoundTripLoader(
+    Reader,
+    RoundTripScanner,
+    RoundTripParser,
+    Composer,
+    RoundTripConstructor,
+    VersionedResolver,
+):
+    def __init__(self, stream, version=None, preserve_quotes=None):
+        # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> None
+        # self.reader = Reader.__init__(self, stream)
+        self.comment_handling = None  # issue 385
+        Reader.__init__(self, stream, loader=self)
+        RoundTripScanner.__init__(self, loader=self)
+        RoundTripParser.__init__(self, loader=self)
+        Composer.__init__(self, loader=self)
+        RoundTripConstructor.__init__(self, preserve_quotes=preserve_quotes, loader=self)
+        VersionedResolver.__init__(self, version, loader=self)

lib/spack/external/_vendoring/ruamel/yaml/nodes.py

@@ -0,0 +1,135 @@
+# coding: utf-8
+
+import sys
+
+from ruamel.yaml.compat import _F
+
+if False:  # MYPY
+    from typing import Dict, Any, Text  # NOQA
+
+
+class Node:
+    __slots__ = 'tag', 'value', 'start_mark', 'end_mark', 'comment', 'anchor'
+
+    def __init__(self, tag, value, start_mark, end_mark, comment=None, anchor=None):
+        # type: (Any, Any, Any, Any, Any, Any) -> None
+        self.tag = tag
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.comment = comment
+        self.anchor = anchor
+
+    def __repr__(self):
+        # type: () -> Any
+        value = self.value
+        # if isinstance(value, list):
+        #     if len(value) == 0:
+        #         value = '<empty>'
+        #     elif len(value) == 1:
+        #         value = '<1 item>'
+        #     else:
+        #         value = f'<{len(value)} items>'
+        # else:
+        #     if len(value) > 75:
+        #         value = repr(value[:70]+' ... ')
+        #     else:
+        #         value = repr(value)
+        value = repr(value)
+        return _F(
+            '{class_name!s}(tag={self_tag!r}, value={value!s})',
+            class_name=self.__class__.__name__,
+            self_tag=self.tag,
+            value=value,
+        )
+
+    def dump(self, indent=0):
+        # type: (int) -> None
+        if isinstance(self.value, str):
+            sys.stdout.write(
+                '{}{}(tag={!r}, value={!r})\n'.format(
+                    '  ' * indent, self.__class__.__name__, self.tag, self.value
+                )
+            )
+            if self.comment:
+                sys.stdout.write('    {}comment: {})\n'.format('  ' * indent, self.comment))
+            return
+        sys.stdout.write(
+            '{}{}(tag={!r})\n'.format('  ' * indent, self.__class__.__name__, self.tag)
+        )
+        if self.comment:
+            sys.stdout.write('    {}comment: {})\n'.format('  ' * indent, self.comment))
+        for v in self.value:
+            if isinstance(v, tuple):
+                for v1 in v:
+                    v1.dump(indent + 1)
+            elif isinstance(v, Node):
+                v.dump(indent + 1)
+            else:
+                sys.stdout.write('Node value type? {}\n'.format(type(v)))
+
+
+class ScalarNode(Node):
+    """
+    styles:
+      ? -> set() ? key, no value
+      " -> double quoted
+      ' -> single quoted
+      | -> literal style
+      > -> folding style
+    """
+
+    __slots__ = ('style',)
+    id = 'scalar'
+
+    def __init__(
+        self, tag, value, start_mark=None, end_mark=None, style=None, comment=None, anchor=None
+    ):
+        # type: (Any, Any, Any, Any, Any, Any, Any) -> None
+        Node.__init__(self, tag, value, start_mark, end_mark, comment=comment, anchor=anchor)
+        self.style = style
+
+
+class CollectionNode(Node):
+    __slots__ = ('flow_style',)
+
+    def __init__(
+        self,
+        tag,
+        value,
+        start_mark=None,
+        end_mark=None,
+        flow_style=None,
+        comment=None,
+        anchor=None,
+    ):
+        # type: (Any, Any, Any, Any, Any, Any, Any) -> None
+        Node.__init__(self, tag, value, start_mark, end_mark, comment=comment)
+        self.flow_style = flow_style
+        self.anchor = anchor
+
+
+class SequenceNode(CollectionNode):
+    __slots__ = ()
+    id = 'sequence'
+
+
+class MappingNode(CollectionNode):
+    __slots__ = ('merge',)
+    id = 'mapping'
+
+    def __init__(
+        self,
+        tag,
+        value,
+        start_mark=None,
+        end_mark=None,
+        flow_style=None,
+        comment=None,
+        anchor=None,
+    ):
+        # type: (Any, Any, Any, Any, Any, Any, Any) -> None
+        CollectionNode.__init__(
+            self, tag, value, start_mark, end_mark, flow_style, comment, anchor
+        )
+        self.merge = None

lib/spack/external/_vendoring/ruamel/yaml/parser.py

@@ -0,0 +1,884 @@
+# coding: utf-8
+
+# The following YAML grammar is LL(1) and is parsed by a recursive descent
+# parser.
+#
+# stream            ::= STREAM-START implicit_document? explicit_document*
+#                                                                   STREAM-END
+# implicit_document ::= block_node DOCUMENT-END*
+# explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
+# block_node_or_indentless_sequence ::=
+#                       ALIAS
+#                       | properties (block_content |
+#                                                   indentless_block_sequence)?
+#                       | block_content
+#                       | indentless_block_sequence
+# block_node        ::= ALIAS
+#                       | properties block_content?
+#                       | block_content
+# flow_node         ::= ALIAS
+#                       | properties flow_content?
+#                       | flow_content
+# properties        ::= TAG ANCHOR? | ANCHOR TAG?
+# block_content     ::= block_collection | flow_collection | SCALAR
+# flow_content      ::= flow_collection | SCALAR
+# block_collection  ::= block_sequence | block_mapping
+# flow_collection   ::= flow_sequence | flow_mapping
+# block_sequence    ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)*
+#                                                                   BLOCK-END
+# indentless_sequence   ::= (BLOCK-ENTRY block_node?)+
+# block_mapping     ::= BLOCK-MAPPING_START
+#                       ((KEY block_node_or_indentless_sequence?)?
+#                       (VALUE block_node_or_indentless_sequence?)?)*
+#                       BLOCK-END
+# flow_sequence     ::= FLOW-SEQUENCE-START
+#                       (flow_sequence_entry FLOW-ENTRY)*
+#                       flow_sequence_entry?
+#                       FLOW-SEQUENCE-END
+# flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+# flow_mapping      ::= FLOW-MAPPING-START
+#                       (flow_mapping_entry FLOW-ENTRY)*
+#                       flow_mapping_entry?
+#                       FLOW-MAPPING-END
+# flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+#
+# FIRST sets:
+#
+# stream: { STREAM-START <}
+# explicit_document: { DIRECTIVE DOCUMENT-START }
+# implicit_document: FIRST(block_node)
+# block_node: { ALIAS TAG ANCHOR SCALAR BLOCK-SEQUENCE-START
+#                  BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# flow_node: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# block_content: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START
+#                               FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
+# flow_content: { FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
+# block_collection: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START }
+# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# block_sequence: { BLOCK-SEQUENCE-START }
+# block_mapping: { BLOCK-MAPPING-START }
+# block_node_or_indentless_sequence: { ALIAS ANCHOR TAG SCALAR
+#               BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START
+#               FLOW-MAPPING-START BLOCK-ENTRY }
+# indentless_sequence: { ENTRY }
+# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# flow_sequence: { FLOW-SEQUENCE-START }
+# flow_mapping: { FLOW-MAPPING-START }
+# flow_sequence_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START
+#                                                    FLOW-MAPPING-START KEY }
+# flow_mapping_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START
+#                                                    FLOW-MAPPING-START KEY }
+
+# need to have full path with import, as pkg_resources tries to load parser.py in __init__.py
+# only to not do anything with the package afterwards
+# and for Jython too
+
+
+from ruamel.yaml.error import MarkedYAMLError
+from ruamel.yaml.tokens import *  # NOQA
+from ruamel.yaml.events import *  # NOQA
+from ruamel.yaml.scanner import Scanner, RoundTripScanner, ScannerError  # NOQA
+from ruamel.yaml.scanner import BlankLineComment
+from ruamel.yaml.comments import C_PRE, C_POST, C_SPLIT_ON_FIRST_BLANK
+from ruamel.yaml.compat import _F, nprint, nprintf  # NOQA
+
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List, Optional  # NOQA
+
+__all__ = ['Parser', 'RoundTripParser', 'ParserError']
+
+
+def xprintf(*args, **kw):
+    # type: (Any, Any) -> Any
+    return nprintf(*args, **kw)
+    pass
+
+
+class ParserError(MarkedYAMLError):
+    pass
+
+
+class Parser:
+    # Since writing a recursive-descendant parser is a straightforward task, we
+    # do not give many comments here.
+
+    DEFAULT_TAGS = {'!': '!', '!!': 'tag:yaml.org,2002:'}
+
+    def __init__(self, loader):
+        # type: (Any) -> None
+        self.loader = loader
+        if self.loader is not None and getattr(self.loader, '_parser', None) is None:
+            self.loader._parser = self
+        self.reset_parser()
+
+    def reset_parser(self):
+        # type: () -> None
+        # Reset the state attributes (to clear self-references)
+        self.current_event = self.last_event = None
+        self.tag_handles = {}  # type: Dict[Any, Any]
+        self.states = []  # type: List[Any]
+        self.marks = []  # type: List[Any]
+        self.state = self.parse_stream_start  # type: Any
+
+    def dispose(self):
+        # type: () -> None
+        self.reset_parser()
+
+    @property
+    def scanner(self):
+        # type: () -> Any
+        if hasattr(self.loader, 'typ'):
+            return self.loader.scanner
+        return self.loader._scanner
+
+    @property
+    def resolver(self):
+        # type: () -> Any
+        if hasattr(self.loader, 'typ'):
+            return self.loader.resolver
+        return self.loader._resolver
+
+    def check_event(self, *choices):
+        # type: (Any) -> bool
+        # Check the type of the next event.
+        if self.current_event is None:
+            if self.state:
+                self.current_event = self.state()
+        if self.current_event is not None:
+            if not choices:
+                return True
+            for choice in choices:
+                if isinstance(self.current_event, choice):
+                    return True
+        return False
+
+    def peek_event(self):
+        # type: () -> Any
+        # Get the next event.
+        if self.current_event is None:
+            if self.state:
+                self.current_event = self.state()
+        return self.current_event
+
+    def get_event(self):
+        # type: () -> Any
+        # Get the next event and proceed further.
+        if self.current_event is None:
+            if self.state:
+                self.current_event = self.state()
+        # assert self.current_event is not None
+        # if self.current_event.end_mark.line != self.peek_event().start_mark.line:
+        xprintf('get_event', repr(self.current_event), self.peek_event().start_mark.line)
+        self.last_event = value = self.current_event
+        self.current_event = None
+        return value
+
+    # stream    ::= STREAM-START implicit_document? explicit_document*
+    #                                                               STREAM-END
+    # implicit_document ::= block_node DOCUMENT-END*
+    # explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
+
+    def parse_stream_start(self):
+        # type: () -> Any
+        # Parse the stream start.
+        token = self.scanner.get_token()
+        self.move_token_comment(token)
+        event = StreamStartEvent(token.start_mark, token.end_mark, encoding=token.encoding)
+
+        # Prepare the next state.
+        self.state = self.parse_implicit_document_start
+
+        return event
+
+    def parse_implicit_document_start(self):
+        # type: () -> Any
+        # Parse an implicit document.
+        if not self.scanner.check_token(DirectiveToken, DocumentStartToken, StreamEndToken):
+            self.tag_handles = self.DEFAULT_TAGS
+            token = self.scanner.peek_token()
+            start_mark = end_mark = token.start_mark
+            event = DocumentStartEvent(start_mark, end_mark, explicit=False)
+
+            # Prepare the next state.
+            self.states.append(self.parse_document_end)
+            self.state = self.parse_block_node
+
+            return event
+
+        else:
+            return self.parse_document_start()
+
+    def parse_document_start(self):
+        # type: () -> Any
+        # Parse any extra document end indicators.
+        while self.scanner.check_token(DocumentEndToken):
+            self.scanner.get_token()
+        # Parse an explicit document.
+        if not self.scanner.check_token(StreamEndToken):
+            version, tags = self.process_directives()
+            if not self.scanner.check_token(DocumentStartToken):
+                raise ParserError(
+                    None,
+                    None,
+                    _F(
+                        "expected '<document start>', but found {pt!r}",
+                        pt=self.scanner.peek_token().id,
+                    ),
+                    self.scanner.peek_token().start_mark,
+                )
+            token = self.scanner.get_token()
+            start_mark = token.start_mark
+            end_mark = token.end_mark
+            # if self.loader is not None and \
+            #    end_mark.line != self.scanner.peek_token().start_mark.line:
+            #     self.loader.scalar_after_indicator = False
+            event = DocumentStartEvent(
+                start_mark, end_mark, explicit=True, version=version, tags=tags,
+                comment=token.comment
+            )  # type: Any
+            self.states.append(self.parse_document_end)
+            self.state = self.parse_document_content
+        else:
+            # Parse the end of the stream.
+            token = self.scanner.get_token()
+            event = StreamEndEvent(token.start_mark, token.end_mark, comment=token.comment)
+            assert not self.states
+            assert not self.marks
+            self.state = None
+        return event
+
+    def parse_document_end(self):
+        # type: () -> Any
+        # Parse the document end.
+        token = self.scanner.peek_token()
+        start_mark = end_mark = token.start_mark
+        explicit = False
+        if self.scanner.check_token(DocumentEndToken):
+            token = self.scanner.get_token()
+            end_mark = token.end_mark
+            explicit = True
+        event = DocumentEndEvent(start_mark, end_mark, explicit=explicit)
+
+        # Prepare the next state.
+        if self.resolver.processing_version == (1, 1):
+            self.state = self.parse_document_start
+        else:
+            self.state = self.parse_implicit_document_start
+
+        return event
+
+    def parse_document_content(self):
+        # type: () -> Any
+        if self.scanner.check_token(
+            DirectiveToken, DocumentStartToken, DocumentEndToken, StreamEndToken
+        ):
+            event = self.process_empty_scalar(self.scanner.peek_token().start_mark)
+            self.state = self.states.pop()
+            return event
+        else:
+            return self.parse_block_node()
+
+    def process_directives(self):
+        # type: () -> Any
+        yaml_version = None
+        self.tag_handles = {}
+        while self.scanner.check_token(DirectiveToken):
+            token = self.scanner.get_token()
+            if token.name == 'YAML':
+                if yaml_version is not None:
+                    raise ParserError(
+                        None, None, 'found duplicate YAML directive', token.start_mark
+                    )
+                major, minor = token.value
+                if major != 1:
+                    raise ParserError(
+                        None,
+                        None,
+                        'found incompatible YAML document (version 1.* is required)',
+                        token.start_mark,
+                    )
+                yaml_version = token.value
+            elif token.name == 'TAG':
+                handle, prefix = token.value
+                if handle in self.tag_handles:
+                    raise ParserError(
+                        None,
+                        None,
+                        _F('duplicate tag handle {handle!r}', handle=handle),
+                        token.start_mark,
+                    )
+                self.tag_handles[handle] = prefix
+        if bool(self.tag_handles):
+            value = yaml_version, self.tag_handles.copy()  # type: Any
+        else:
+            value = yaml_version, None
+        if self.loader is not None and hasattr(self.loader, 'tags'):
+            self.loader.version = yaml_version
+            if self.loader.tags is None:
+                self.loader.tags = {}
+            for k in self.tag_handles:
+                self.loader.tags[k] = self.tag_handles[k]
+        for key in self.DEFAULT_TAGS:
+            if key not in self.tag_handles:
+                self.tag_handles[key] = self.DEFAULT_TAGS[key]
+        return value
+
+    # block_node_or_indentless_sequence ::= ALIAS
+    #               | properties (block_content | indentless_block_sequence)?
+    #               | block_content
+    #               | indentless_block_sequence
+    # block_node    ::= ALIAS
+    #                   | properties block_content?
+    #                   | block_content
+    # flow_node     ::= ALIAS
+    #                   | properties flow_content?
+    #                   | flow_content
+    # properties    ::= TAG ANCHOR? | ANCHOR TAG?
+    # block_content     ::= block_collection | flow_collection | SCALAR
+    # flow_content      ::= flow_collection | SCALAR
+    # block_collection  ::= block_sequence | block_mapping
+    # flow_collection   ::= flow_sequence | flow_mapping
+
+    def parse_block_node(self):
+        # type: () -> Any
+        return self.parse_node(block=True)
+
+    def parse_flow_node(self):
+        # type: () -> Any
+        return self.parse_node()
+
+    def parse_block_node_or_indentless_sequence(self):
+        # type: () -> Any
+        return self.parse_node(block=True, indentless_sequence=True)
+
+    def transform_tag(self, handle, suffix):
+        # type: (Any, Any) -> Any
+        return self.tag_handles[handle] + suffix
+
+    def parse_node(self, block=False, indentless_sequence=False):
+        # type: (bool, bool) -> Any
+        if self.scanner.check_token(AliasToken):
+            token = self.scanner.get_token()
+            event = AliasEvent(token.value, token.start_mark, token.end_mark)  # type: Any
+            self.state = self.states.pop()
+            return event
+
+        anchor = None
+        tag = None
+        start_mark = end_mark = tag_mark = None
+        if self.scanner.check_token(AnchorToken):
+            token = self.scanner.get_token()
+            self.move_token_comment(token)
+            start_mark = token.start_mark
+            end_mark = token.end_mark
+            anchor = token.value
+            if self.scanner.check_token(TagToken):
+                token = self.scanner.get_token()
+                tag_mark = token.start_mark
+                end_mark = token.end_mark
+                tag = token.value
+        elif self.scanner.check_token(TagToken):
+            token = self.scanner.get_token()
+            start_mark = tag_mark = token.start_mark
+            end_mark = token.end_mark
+            tag = token.value
+            if self.scanner.check_token(AnchorToken):
+                token = self.scanner.get_token()
+                start_mark = tag_mark = token.start_mark
+                end_mark = token.end_mark
+                anchor = token.value
+        if tag is not None:
+            handle, suffix = tag
+            if handle is not None:
+                if handle not in self.tag_handles:
+                    raise ParserError(
+                        'while parsing a node',
+                        start_mark,
+                        _F('found undefined tag handle {handle!r}', handle=handle),
+                        tag_mark,
+                    )
+                tag = self.transform_tag(handle, suffix)
+            else:
+                tag = suffix
+        # if tag == '!':
+        #     raise ParserError("while parsing a node", start_mark,
+        #             "found non-specific tag '!'", tag_mark,
+        #      "Please check 'http://pyyaml.org/wiki/YAMLNonSpecificTag'
+        #     and share your opinion.")
+        if start_mark is None:
+            start_mark = end_mark = self.scanner.peek_token().start_mark
+        event = None
+        implicit = tag is None or tag == '!'
+        if indentless_sequence and self.scanner.check_token(BlockEntryToken):
+            comment = None
+            pt = self.scanner.peek_token()
+            if self.loader and self.loader.comment_handling is None:
+                if pt.comment and pt.comment[0]:
+                    comment = [pt.comment[0], []]
+                    pt.comment[0] = None
+            elif self.loader:
+                if pt.comment:
+                    comment = pt.comment
+            end_mark = self.scanner.peek_token().end_mark
+            event = SequenceStartEvent(
+                anchor, tag, implicit, start_mark, end_mark, flow_style=False, comment=comment
+            )
+            self.state = self.parse_indentless_sequence_entry
+            return event
+
+        if self.scanner.check_token(ScalarToken):
+            token = self.scanner.get_token()
+            # self.scanner.peek_token_same_line_comment(token)
+            end_mark = token.end_mark
+            if (token.plain and tag is None) or tag == '!':
+                implicit = (True, False)
+            elif tag is None:
+                implicit = (False, True)
+            else:
+                implicit = (False, False)
+            # nprint('se', token.value, token.comment)
+            event = ScalarEvent(
+                anchor,
+                tag,
+                implicit,
+                token.value,
+                start_mark,
+                end_mark,
+                style=token.style,
+                comment=token.comment,
+            )
+            self.state = self.states.pop()
+        elif self.scanner.check_token(FlowSequenceStartToken):
+            pt = self.scanner.peek_token()
+            end_mark = pt.end_mark
+            event = SequenceStartEvent(
+                anchor,
+                tag,
+                implicit,
+                start_mark,
+                end_mark,
+                flow_style=True,
+                comment=pt.comment,
+            )
+            self.state = self.parse_flow_sequence_first_entry
+        elif self.scanner.check_token(FlowMappingStartToken):
+            pt = self.scanner.peek_token()
+            end_mark = pt.end_mark
+            event = MappingStartEvent(
+                anchor,
+                tag,
+                implicit,
+                start_mark,
+                end_mark,
+                flow_style=True,
+                comment=pt.comment,
+            )
+            self.state = self.parse_flow_mapping_first_key
+        elif block and self.scanner.check_token(BlockSequenceStartToken):
+            end_mark = self.scanner.peek_token().start_mark
+            # should inserting the comment be dependent on the
+            # indentation?
+            pt = self.scanner.peek_token()
+            comment = pt.comment
+            # nprint('pt0', type(pt))
+            if comment is None or comment[1] is None:
+                comment = pt.split_old_comment()
+            # nprint('pt1', comment)
+            event = SequenceStartEvent(
+                anchor, tag, implicit, start_mark, end_mark, flow_style=False, comment=comment
+            )
+            self.state = self.parse_block_sequence_first_entry
+        elif block and self.scanner.check_token(BlockMappingStartToken):
+            end_mark = self.scanner.peek_token().start_mark
+            comment = self.scanner.peek_token().comment
+            event = MappingStartEvent(
+                anchor, tag, implicit, start_mark, end_mark, flow_style=False, comment=comment
+            )
+            self.state = self.parse_block_mapping_first_key
+        elif anchor is not None or tag is not None:
+            # Empty scalars are allowed even if a tag or an anchor is
+            # specified.
+            event = ScalarEvent(anchor, tag, (implicit, False), "", start_mark, end_mark)
+            self.state = self.states.pop()
+        else:
+            if block:
+                node = 'block'
+            else:
+                node = 'flow'
+            token = self.scanner.peek_token()
+            raise ParserError(
+                _F('while parsing a {node!s} node', node=node),
+                start_mark,
+                _F('expected the node content, but found {token_id!r}', token_id=token.id),
+                token.start_mark,
+            )
+        return event
+
+    # block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)*
+    #                                                               BLOCK-END
+
+    def parse_block_sequence_first_entry(self):
+        # type: () -> Any
+        token = self.scanner.get_token()
+        # move any comment from start token
+        # self.move_token_comment(token)
+        self.marks.append(token.start_mark)
+        return self.parse_block_sequence_entry()
+
+    def parse_block_sequence_entry(self):
+        # type: () -> Any
+        if self.scanner.check_token(BlockEntryToken):
+            token = self.scanner.get_token()
+            self.move_token_comment(token)
+            if not self.scanner.check_token(BlockEntryToken, BlockEndToken):
+                self.states.append(self.parse_block_sequence_entry)
+                return self.parse_block_node()
+            else:
+                self.state = self.parse_block_sequence_entry
+                return self.process_empty_scalar(token.end_mark)
+        if not self.scanner.check_token(BlockEndToken):
+            token = self.scanner.peek_token()
+            raise ParserError(
+                'while parsing a block collection',
+                self.marks[-1],
+                _F('expected <block end>, but found {token_id!r}', token_id=token.id),
+                token.start_mark,
+            )
+        token = self.scanner.get_token()  # BlockEndToken
+        event = SequenceEndEvent(token.start_mark, token.end_mark, comment=token.comment)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    # indentless_sequence ::= (BLOCK-ENTRY block_node?)+
+
+    # indentless_sequence?
+    # sequence:
+    # - entry
+    #  - nested
+
+    def parse_indentless_sequence_entry(self):
+        # type: () -> Any
+        if self.scanner.check_token(BlockEntryToken):
+            token = self.scanner.get_token()
+            self.move_token_comment(token)
+            if not self.scanner.check_token(
+                BlockEntryToken, KeyToken, ValueToken, BlockEndToken
+            ):
+                self.states.append(self.parse_indentless_sequence_entry)
+                return self.parse_block_node()
+            else:
+                self.state = self.parse_indentless_sequence_entry
+                return self.process_empty_scalar(token.end_mark)
+        token = self.scanner.peek_token()
+        c = None
+        if self.loader and self.loader.comment_handling is None:
+            c = token.comment
+            start_mark = token.start_mark
+        else:
+            start_mark = self.last_event.end_mark  # type: ignore
+            c = self.distribute_comment(token.comment, start_mark.line)  # type: ignore
+        event = SequenceEndEvent(start_mark, start_mark, comment=c)
+        self.state = self.states.pop()
+        return event
+
+    # block_mapping     ::= BLOCK-MAPPING_START
+    #                       ((KEY block_node_or_indentless_sequence?)?
+    #                       (VALUE block_node_or_indentless_sequence?)?)*
+    #                       BLOCK-END
+
+    def parse_block_mapping_first_key(self):
+        # type: () -> Any
+        token = self.scanner.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_block_mapping_key()
+
+    def parse_block_mapping_key(self):
+        # type: () -> Any
+        if self.scanner.check_token(KeyToken):
+            token = self.scanner.get_token()
+            self.move_token_comment(token)
+            if not self.scanner.check_token(KeyToken, ValueToken, BlockEndToken):
+                self.states.append(self.parse_block_mapping_value)
+                return self.parse_block_node_or_indentless_sequence()
+            else:
+                self.state = self.parse_block_mapping_value
+                return self.process_empty_scalar(token.end_mark)
+        if self.resolver.processing_version > (1, 1) and self.scanner.check_token(ValueToken):
+            self.state = self.parse_block_mapping_value
+            return self.process_empty_scalar(self.scanner.peek_token().start_mark)
+        if not self.scanner.check_token(BlockEndToken):
+            token = self.scanner.peek_token()
+            raise ParserError(
+                'while parsing a block mapping',
+                self.marks[-1],
+                _F('expected <block end>, but found {token_id!r}', token_id=token.id),
+                token.start_mark,
+            )
+        token = self.scanner.get_token()
+        self.move_token_comment(token)
+        event = MappingEndEvent(token.start_mark, token.end_mark, comment=token.comment)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    def parse_block_mapping_value(self):
+        # type: () -> Any
+        if self.scanner.check_token(ValueToken):
+            token = self.scanner.get_token()
+            # value token might have post comment move it to e.g. block
+            if self.scanner.check_token(ValueToken):
+                self.move_token_comment(token)
+            else:
+                if not self.scanner.check_token(KeyToken):
+                    self.move_token_comment(token, empty=True)
+                # else: empty value for this key cannot move token.comment
+            if not self.scanner.check_token(KeyToken, ValueToken, BlockEndToken):
+                self.states.append(self.parse_block_mapping_key)
+                return self.parse_block_node_or_indentless_sequence()
+            else:
+                self.state = self.parse_block_mapping_key
+                comment = token.comment
+                if comment is None:
+                    token = self.scanner.peek_token()
+                    comment = token.comment
+                    if comment:
+                        token._comment = [None, comment[1]]
+                        comment = [comment[0], None]
+                return self.process_empty_scalar(token.end_mark, comment=comment)
+        else:
+            self.state = self.parse_block_mapping_key
+            token = self.scanner.peek_token()
+            return self.process_empty_scalar(token.start_mark)
+
+    # flow_sequence     ::= FLOW-SEQUENCE-START
+    #                       (flow_sequence_entry FLOW-ENTRY)*
+    #                       flow_sequence_entry?
+    #                       FLOW-SEQUENCE-END
+    # flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+    #
+    # Note that while production rules for both flow_sequence_entry and
+    # flow_mapping_entry are equal, their interpretations are different.
+    # For `flow_sequence_entry`, the part `KEY flow_node? (VALUE flow_node?)?`
+    # generate an inline mapping (set syntax).
+
+    def parse_flow_sequence_first_entry(self):
+        # type: () -> Any
+        token = self.scanner.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_flow_sequence_entry(first=True)
+
+    def parse_flow_sequence_entry(self, first=False):
+        # type: (bool) -> Any
+        if not self.scanner.check_token(FlowSequenceEndToken):
+            if not first:
+                if self.scanner.check_token(FlowEntryToken):
+                    self.scanner.get_token()
+                else:
+                    token = self.scanner.peek_token()
+                    raise ParserError(
+                        'while parsing a flow sequence',
+                        self.marks[-1],
+                        _F("expected ',' or ']', but got {token_id!r}", token_id=token.id),
+                        token.start_mark,
+                    )
+
+            if self.scanner.check_token(KeyToken):
+                token = self.scanner.peek_token()
+                event = MappingStartEvent(
+                    None, None, True, token.start_mark, token.end_mark, flow_style=True
+                )  # type: Any
+                self.state = self.parse_flow_sequence_entry_mapping_key
+                return event
+            elif not self.scanner.check_token(FlowSequenceEndToken):
+                self.states.append(self.parse_flow_sequence_entry)
+                return self.parse_flow_node()
+        token = self.scanner.get_token()
+        event = SequenceEndEvent(token.start_mark, token.end_mark, comment=token.comment)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    def parse_flow_sequence_entry_mapping_key(self):
+        # type: () -> Any
+        token = self.scanner.get_token()
+        if not self.scanner.check_token(ValueToken, FlowEntryToken, FlowSequenceEndToken):
+            self.states.append(self.parse_flow_sequence_entry_mapping_value)
+            return self.parse_flow_node()
+        else:
+            self.state = self.parse_flow_sequence_entry_mapping_value
+            return self.process_empty_scalar(token.end_mark)
+
+    def parse_flow_sequence_entry_mapping_value(self):
+        # type: () -> Any
+        if self.scanner.check_token(ValueToken):
+            token = self.scanner.get_token()
+            if not self.scanner.check_token(FlowEntryToken, FlowSequenceEndToken):
+                self.states.append(self.parse_flow_sequence_entry_mapping_end)
+                return self.parse_flow_node()
+            else:
+                self.state = self.parse_flow_sequence_entry_mapping_end
+                return self.process_empty_scalar(token.end_mark)
+        else:
+            self.state = self.parse_flow_sequence_entry_mapping_end
+            token = self.scanner.peek_token()
+            return self.process_empty_scalar(token.start_mark)
+
+    def parse_flow_sequence_entry_mapping_end(self):
+        # type: () -> Any
+        self.state = self.parse_flow_sequence_entry
+        token = self.scanner.peek_token()
+        return MappingEndEvent(token.start_mark, token.start_mark)
+
+    # flow_mapping  ::= FLOW-MAPPING-START
+    #                   (flow_mapping_entry FLOW-ENTRY)*
+    #                   flow_mapping_entry?
+    #                   FLOW-MAPPING-END
+    # flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+
+    def parse_flow_mapping_first_key(self):
+        # type: () -> Any
+        token = self.scanner.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_flow_mapping_key(first=True)
+
+    def parse_flow_mapping_key(self, first=False):
+        # type: (Any) -> Any
+        if not self.scanner.check_token(FlowMappingEndToken):
+            if not first:
+                if self.scanner.check_token(FlowEntryToken):
+                    self.scanner.get_token()
+                else:
+                    token = self.scanner.peek_token()
+                    raise ParserError(
+                        'while parsing a flow mapping',
+                        self.marks[-1],
+                        _F("expected ',' or '}}', but got {token_id!r}", token_id=token.id),
+                        token.start_mark,
+                    )
+            if self.scanner.check_token(KeyToken):
+                token = self.scanner.get_token()
+                if not self.scanner.check_token(
+                    ValueToken, FlowEntryToken, FlowMappingEndToken
+                ):
+                    self.states.append(self.parse_flow_mapping_value)
+                    return self.parse_flow_node()
+                else:
+                    self.state = self.parse_flow_mapping_value
+                    return self.process_empty_scalar(token.end_mark)
+            elif self.resolver.processing_version > (1, 1) and self.scanner.check_token(
+                ValueToken
+            ):
+                self.state = self.parse_flow_mapping_value
+                return self.process_empty_scalar(self.scanner.peek_token().end_mark)
+            elif not self.scanner.check_token(FlowMappingEndToken):
+                self.states.append(self.parse_flow_mapping_empty_value)
+                return self.parse_flow_node()
+        token = self.scanner.get_token()
+        event = MappingEndEvent(token.start_mark, token.end_mark, comment=token.comment)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    def parse_flow_mapping_value(self):
+        # type: () -> Any
+        if self.scanner.check_token(ValueToken):
+            token = self.scanner.get_token()
+            if not self.scanner.check_token(FlowEntryToken, FlowMappingEndToken):
+                self.states.append(self.parse_flow_mapping_key)
+                return self.parse_flow_node()
+            else:
+                self.state = self.parse_flow_mapping_key
+                return self.process_empty_scalar(token.end_mark)
+        else:
+            self.state = self.parse_flow_mapping_key
+            token = self.scanner.peek_token()
+            return self.process_empty_scalar(token.start_mark)
+
+    def parse_flow_mapping_empty_value(self):
+        # type: () -> Any
+        self.state = self.parse_flow_mapping_key
+        return self.process_empty_scalar(self.scanner.peek_token().start_mark)
+
+    def process_empty_scalar(self, mark, comment=None):
+        # type: (Any, Any) -> Any
+        return ScalarEvent(None, None, (True, False), "", mark, mark, comment=comment)
+
+    def move_token_comment(self, token, nt=None, empty=False):
+        # type: (Any, Optional[Any], Optional[bool]) -> Any
+        pass
+
+
+class RoundTripParser(Parser):
+    """roundtrip is a safe loader, that wants to see the unmangled tag"""
+
+    def transform_tag(self, handle, suffix):
+        # type: (Any, Any) -> Any
+        # return self.tag_handles[handle]+suffix
+        if handle == '!!' and suffix in (
+            'null',
+            'bool',
+            'int',
+            'float',
+            'binary',
+            'timestamp',
+            'omap',
+            'pairs',
+            'set',
+            'str',
+            'seq',
+            'map',
+        ):
+            return Parser.transform_tag(self, handle, suffix)
+        return handle + suffix
+
+    def move_token_comment(self, token, nt=None, empty=False):
+        # type: (Any, Optional[Any], Optional[bool]) -> Any
+        token.move_old_comment(self.scanner.peek_token() if nt is None else nt, empty=empty)
+
+
+class RoundTripParserSC(RoundTripParser):
+    """roundtrip is a safe loader, that wants to see the unmangled tag"""
+
+    # some of the differences are based on the superclass testing
+    # if self.loader.comment_handling is not None
+
+    def move_token_comment(self, token, nt=None, empty=False):
+        # type: (Any, Any, Any, Optional[bool]) -> None
+        token.move_new_comment(self.scanner.peek_token() if nt is None else nt, empty=empty)
+
+    def distribute_comment(self, comment, line):
+        # type: (Any, Any) -> Any
+        # ToDo, look at indentation of the comment to determine attachment
+        if comment is None:
+            return None
+        if not comment[0]:
+            return None
+        if comment[0][0] != line + 1:
+            nprintf('>>>dcxxx', comment, line)
+        assert comment[0][0] == line + 1
+        # if comment[0] - line > 1:
+        #     return
+        typ = self.loader.comment_handling & 0b11
+        # nprintf('>>>dca', comment, line, typ)
+        if typ == C_POST:
+            return None
+        if typ == C_PRE:
+            c = [None, None, comment[0]]
+            comment[0] = None
+            return c
+        # nprintf('>>>dcb', comment[0])
+        for _idx, cmntidx in enumerate(comment[0]):
+            # nprintf('>>>dcb', cmntidx)
+            if isinstance(self.scanner.comments[cmntidx], BlankLineComment):
+                break
+        else:
+            return None  # no space found
+        if _idx == 0:
+            return None  # first line was blank
+        # nprintf('>>>dcc', idx)
+        if typ == C_SPLIT_ON_FIRST_BLANK:
+            c = [None, None, comment[0][:_idx]]
+            comment[0] = comment[0][_idx:]
+            return c
+        raise NotImplementedError  # reserved

lib/spack/external/_vendoring/ruamel/yaml/reader.py

@@ -0,0 +1,302 @@
+# coding: utf-8
+
+# This module contains abstractions for the input stream. You don't have to
+# looks further, there are no pretty code.
+#
+# We define two classes here.
+#
+#   Mark(source, line, column)
+# It's just a record and its only use is producing nice error messages.
+# Parser does not use it for any other purposes.
+#
+#   Reader(source, data)
+# Reader determines the encoding of `data` and converts it to unicode.
+# Reader provides the following methods and attributes:
+#   reader.peek(length=1) - return the next `length` characters
+#   reader.forward(length=1) - move the current position to `length`
+#      characters.
+#   reader.index - the number of the current character.
+#   reader.line, stream.column - the line and the column of the current
+#      character.
+
+import codecs
+
+from ruamel.yaml.error import YAMLError, FileMark, StringMark, YAMLStreamError
+from ruamel.yaml.compat import _F  # NOQA
+from ruamel.yaml.util import RegExp
+
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List, Union, Text, Tuple, Optional  # NOQA
+#    from ruamel.yaml.compat import StreamTextType  # NOQA
+
+__all__ = ['Reader', 'ReaderError']
+
+
+class ReaderError(YAMLError):
+    def __init__(self, name, position, character, encoding, reason):
+        # type: (Any, Any, Any, Any, Any) -> None
+        self.name = name
+        self.character = character
+        self.position = position
+        self.encoding = encoding
+        self.reason = reason
+
+    def __str__(self):
+        # type: () -> Any
+        if isinstance(self.character, bytes):
+            return _F(
+                "'{self_encoding!s}' codec can't decode byte #x{ord_self_character:02x}: "
+                '{self_reason!s}\n'
+                '  in "{self_name!s}", position {self_position:d}',
+                self_encoding=self.encoding,
+                ord_self_character=ord(self.character),
+                self_reason=self.reason,
+                self_name=self.name,
+                self_position=self.position,
+            )
+        else:
+            return _F(
+                'unacceptable character #x{self_character:04x}: {self_reason!s}\n'
+                '  in "{self_name!s}", position {self_position:d}',
+                self_character=self.character,
+                self_reason=self.reason,
+                self_name=self.name,
+                self_position=self.position,
+            )
+
+
+class Reader:
+    # Reader:
+    # - determines the data encoding and converts it to a unicode string,
+    # - checks if characters are in allowed range,
+    # - adds '\0' to the end.
+
+    # Reader accepts
+    #  - a `bytes` object,
+    #  - a `str` object,
+    #  - a file-like object with its `read` method returning `str`,
+    #  - a file-like object with its `read` method returning `unicode`.
+
+    # Yeah, it's ugly and slow.
+
+    def __init__(self, stream, loader=None):
+        # type: (Any, Any) -> None
+        self.loader = loader
+        if self.loader is not None and getattr(self.loader, '_reader', None) is None:
+            self.loader._reader = self
+        self.reset_reader()
+        self.stream = stream  # type: Any  # as .read is called
+
+    def reset_reader(self):
+        # type: () -> None
+        self.name = None  # type: Any
+        self.stream_pointer = 0
+        self.eof = True
+        self.buffer = ""
+        self.pointer = 0
+        self.raw_buffer = None  # type: Any
+        self.raw_decode = None
+        self.encoding = None  # type: Optional[Text]
+        self.index = 0
+        self.line = 0
+        self.column = 0
+
+    @property
+    def stream(self):
+        # type: () -> Any
+        try:
+            return self._stream
+        except AttributeError:
+            raise YAMLStreamError('input stream needs to specified')
+
+    @stream.setter
+    def stream(self, val):
+        # type: (Any) -> None
+        if val is None:
+            return
+        self._stream = None
+        if isinstance(val, str):
+            self.name = '<unicode string>'
+            self.check_printable(val)
+            self.buffer = val + '\0'
+        elif isinstance(val, bytes):
+            self.name = '<byte string>'
+            self.raw_buffer = val
+            self.determine_encoding()
+        else:
+            if not hasattr(val, 'read'):
+                raise YAMLStreamError('stream argument needs to have a read() method')
+            self._stream = val
+            self.name = getattr(self.stream, 'name', '<file>')
+            self.eof = False
+            self.raw_buffer = None
+            self.determine_encoding()
+
+    def peek(self, index=0):
+        # type: (int) -> Text
+        try:
+            return self.buffer[self.pointer + index]
+        except IndexError:
+            self.update(index + 1)
+            return self.buffer[self.pointer + index]
+
+    def prefix(self, length=1):
+        # type: (int) -> Any
+        if self.pointer + length >= len(self.buffer):
+            self.update(length)
+        return self.buffer[self.pointer : self.pointer + length]
+
+    def forward_1_1(self, length=1):
+        # type: (int) -> None
+        if self.pointer + length + 1 >= len(self.buffer):
+            self.update(length + 1)
+        while length != 0:
+            ch = self.buffer[self.pointer]
+            self.pointer += 1
+            self.index += 1
+            if ch in '\n\x85\u2028\u2029' or (
+                ch == '\r' and self.buffer[self.pointer] != '\n'
+            ):
+                self.line += 1
+                self.column = 0
+            elif ch != '\uFEFF':
+                self.column += 1
+            length -= 1
+
+    def forward(self, length=1):
+        # type: (int) -> None
+        if self.pointer + length + 1 >= len(self.buffer):
+            self.update(length + 1)
+        while length != 0:
+            ch = self.buffer[self.pointer]
+            self.pointer += 1
+            self.index += 1
+            if ch == '\n' or (ch == '\r' and self.buffer[self.pointer] != '\n'):
+                self.line += 1
+                self.column = 0
+            elif ch != '\uFEFF':
+                self.column += 1
+            length -= 1
+
+    def get_mark(self):
+        # type: () -> Any
+        if self.stream is None:
+            return StringMark(
+                self.name, self.index, self.line, self.column, self.buffer, self.pointer
+            )
+        else:
+            return FileMark(self.name, self.index, self.line, self.column)
+
+    def determine_encoding(self):
+        # type: () -> None
+        while not self.eof and (self.raw_buffer is None or len(self.raw_buffer) < 2):
+            self.update_raw()
+        if isinstance(self.raw_buffer, bytes):
+            if self.raw_buffer.startswith(codecs.BOM_UTF16_LE):
+                self.raw_decode = codecs.utf_16_le_decode  # type: ignore
+                self.encoding = 'utf-16-le'
+            elif self.raw_buffer.startswith(codecs.BOM_UTF16_BE):
+                self.raw_decode = codecs.utf_16_be_decode  # type: ignore
+                self.encoding = 'utf-16-be'
+            else:
+                self.raw_decode = codecs.utf_8_decode  # type: ignore
+                self.encoding = 'utf-8'
+        self.update(1)
+
+    NON_PRINTABLE = RegExp(
+        '[^\x09\x0A\x0D\x20-\x7E\x85' '\xA0-\uD7FF' '\uE000-\uFFFD' '\U00010000-\U0010FFFF' ']'
+    )
+
+    _printable_ascii = ('\x09\x0A\x0D' + "".join(map(chr, range(0x20, 0x7F)))).encode('ascii')
+
+    @classmethod
+    def _get_non_printable_ascii(cls, data):  # type: ignore
+        # type: (Text, bytes) -> Optional[Tuple[int, Text]]
+        ascii_bytes = data.encode('ascii')  # type: ignore
+        non_printables = ascii_bytes.translate(None, cls._printable_ascii)  # type: ignore
+        if not non_printables:
+            return None
+        non_printable = non_printables[:1]
+        return ascii_bytes.index(non_printable), non_printable.decode('ascii')
+
+    @classmethod
+    def _get_non_printable_regex(cls, data):
+        # type: (Text) -> Optional[Tuple[int, Text]]
+        match = cls.NON_PRINTABLE.search(data)
+        if not bool(match):
+            return None
+        return match.start(), match.group()
+
+    @classmethod
+    def _get_non_printable(cls, data):
+        # type: (Text) -> Optional[Tuple[int, Text]]
+        try:
+            return cls._get_non_printable_ascii(data)  # type: ignore
+        except UnicodeEncodeError:
+            return cls._get_non_printable_regex(data)
+
+    def check_printable(self, data):
+        # type: (Any) -> None
+        non_printable_match = self._get_non_printable(data)
+        if non_printable_match is not None:
+            start, character = non_printable_match
+            position = self.index + (len(self.buffer) - self.pointer) + start
+            raise ReaderError(
+                self.name,
+                position,
+                ord(character),
+                'unicode',
+                'special characters are not allowed',
+            )
+
+    def update(self, length):
+        # type: (int) -> None
+        if self.raw_buffer is None:
+            return
+        self.buffer = self.buffer[self.pointer :]
+        self.pointer = 0
+        while len(self.buffer) < length:
+            if not self.eof:
+                self.update_raw()
+            if self.raw_decode is not None:
+                try:
+                    data, converted = self.raw_decode(self.raw_buffer, 'strict', self.eof)
+                except UnicodeDecodeError as exc:
+                    character = self.raw_buffer[exc.start]
+                    if self.stream is not None:
+                        position = self.stream_pointer - len(self.raw_buffer) + exc.start
+                    elif self.stream is not None:
+                        position = self.stream_pointer - len(self.raw_buffer) + exc.start
+                    else:
+                        position = exc.start
+                    raise ReaderError(self.name, position, character, exc.encoding, exc.reason)
+            else:
+                data = self.raw_buffer
+                converted = len(data)
+            self.check_printable(data)
+            self.buffer += data
+            self.raw_buffer = self.raw_buffer[converted:]
+            if self.eof:
+                self.buffer += '\0'
+                self.raw_buffer = None
+                break
+
+    def update_raw(self, size=None):
+        # type: (Optional[int]) -> None
+        if size is None:
+            size = 4096
+        data = self.stream.read(size)
+        if self.raw_buffer is None:
+            self.raw_buffer = data
+        else:
+            self.raw_buffer += data
+        self.stream_pointer += len(data)
+        if not data:
+            self.eof = True
+
+
+# try:
+#     import psyco
+#     psyco.bind(Reader)
+# except ImportError:
+#     pass

lib/spack/external/_vendoring/ruamel/yaml/resolver.py

@@ -1,54 +1,166 @@
 # coding: utf-8
 
-from __future__ import absolute_import
-
 import re
 
-try:
-    from .error import *                               # NOQA
-    from .nodes import *                               # NOQA
-    from .compat import string_types
-except (ImportError, ValueError):  # for Jython
-    from ruamel.yaml.error import *                               # NOQA
-    from ruamel.yaml.nodes import *                               # NOQA
-    from ruamel.yaml.compat import string_types
+if False:  # MYPY
+    from typing import Any, Dict, List, Union, Text, Optional  # NOQA
+    from ruamel.yaml.compat import VersionType  # NOQA
+
+from ruamel.yaml.compat import _DEFAULT_YAML_VERSION, _F  # NOQA
+from ruamel.yaml.error import *  # NOQA
+from ruamel.yaml.nodes import MappingNode, ScalarNode, SequenceNode  # NOQA
+from ruamel.yaml.util import RegExp  # NOQA
 
 __all__ = ['BaseResolver', 'Resolver', 'VersionedResolver']
 
 
-_DEFAULT_VERSION = (1, 2)
+# fmt: off
+# resolvers consist of
+# - a list of applicable version
+# - a tag
+# - a regexp
+# - a list of first characters to match
+implicit_resolvers = [
+    ([(1, 2)],
+        'tag:yaml.org,2002:bool',
+        RegExp('''^(?:true|True|TRUE|false|False|FALSE)$''', re.X),
+        list('tTfF')),
+    ([(1, 1)],
+        'tag:yaml.org,2002:bool',
+        RegExp('''^(?:y|Y|yes|Yes|YES|n|N|no|No|NO
+        |true|True|TRUE|false|False|FALSE
+        |on|On|ON|off|Off|OFF)$''', re.X),
+        list('yYnNtTfFoO')),
+    ([(1, 2)],
+        'tag:yaml.org,2002:float',
+        RegExp('''^(?:
+         [-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+]?[0-9]+)?
+        |[-+]?(?:[0-9][0-9_]*)(?:[eE][-+]?[0-9]+)
+        |[-+]?\\.[0-9_]+(?:[eE][-+][0-9]+)?
+        |[-+]?\\.(?:inf|Inf|INF)
+        |\\.(?:nan|NaN|NAN))$''', re.X),
+        list('-+0123456789.')),
+    ([(1, 1)],
+        'tag:yaml.org,2002:float',
+        RegExp('''^(?:
+         [-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+]?[0-9]+)?
+        |[-+]?(?:[0-9][0-9_]*)(?:[eE][-+]?[0-9]+)
+        |\\.[0-9_]+(?:[eE][-+][0-9]+)?
+        |[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*  # sexagesimal float
+        |[-+]?\\.(?:inf|Inf|INF)
+        |\\.(?:nan|NaN|NAN))$''', re.X),
+        list('-+0123456789.')),
+    ([(1, 2)],
+        'tag:yaml.org,2002:int',
+        RegExp('''^(?:[-+]?0b[0-1_]+
+        |[-+]?0o?[0-7_]+
+        |[-+]?[0-9_]+
+        |[-+]?0x[0-9a-fA-F_]+)$''', re.X),
+        list('-+0123456789')),
+    ([(1, 1)],
+        'tag:yaml.org,2002:int',
+        RegExp('''^(?:[-+]?0b[0-1_]+
+        |[-+]?0?[0-7_]+
+        |[-+]?(?:0|[1-9][0-9_]*)
+        |[-+]?0x[0-9a-fA-F_]+
+        |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),  # sexagesimal int
+        list('-+0123456789')),
+    ([(1, 2), (1, 1)],
+        'tag:yaml.org,2002:merge',
+        RegExp('^(?:<<)$'),
+        ['<']),
+    ([(1, 2), (1, 1)],
+        'tag:yaml.org,2002:null',
+        RegExp('''^(?: ~
+        |null|Null|NULL
+        | )$''', re.X),
+        ['~', 'n', 'N', '']),
+    ([(1, 2), (1, 1)],
+        'tag:yaml.org,2002:timestamp',
+        RegExp('''^(?:[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]
+        |[0-9][0-9][0-9][0-9] -[0-9][0-9]? -[0-9][0-9]?
+        (?:[Tt]|[ \\t]+)[0-9][0-9]?
+        :[0-9][0-9] :[0-9][0-9] (?:\\.[0-9]*)?
+        (?:[ \\t]*(?:Z|[-+][0-9][0-9]?(?::[0-9][0-9])?))?)$''', re.X),
+        list('0123456789')),
+    ([(1, 2), (1, 1)],
+        'tag:yaml.org,2002:value',
+        RegExp('^(?:=)$'),
+        ['=']),
+    # The following resolver is only for documentation purposes. It cannot work
+    # because plain scalars cannot start with '!', '&', or '*'.
+    ([(1, 2), (1, 1)],
+        'tag:yaml.org,2002:yaml',
+        RegExp('^(?:!|&|\\*)$'),
+        list('!&*')),
+]
+# fmt: on
 
 
 class ResolverError(YAMLError):
     pass
 
 
-class BaseResolver(object):
+class BaseResolver:
 
-    DEFAULT_SCALAR_TAG = u'tag:yaml.org,2002:str'
-    DEFAULT_SEQUENCE_TAG = u'tag:yaml.org,2002:seq'
-    DEFAULT_MAPPING_TAG = u'tag:yaml.org,2002:map'
+    DEFAULT_SCALAR_TAG = 'tag:yaml.org,2002:str'
+    DEFAULT_SEQUENCE_TAG = 'tag:yaml.org,2002:seq'
+    DEFAULT_MAPPING_TAG = 'tag:yaml.org,2002:map'
 
-    yaml_implicit_resolvers = {}
-    yaml_path_resolvers = {}
+    yaml_implicit_resolvers = {}  # type: Dict[Any, Any]
+    yaml_path_resolvers = {}  # type: Dict[Any, Any]
 
-    def __init__(self):
-        self._loader_version = None
-        self.resolver_exact_paths = []
-        self.resolver_prefix_paths = []
+    def __init__(self, loadumper=None):
+        # type: (Any, Any) -> None
+        self.loadumper = loadumper
+        if self.loadumper is not None and getattr(self.loadumper, '_resolver', None) is None:
+            self.loadumper._resolver = self.loadumper
+        self._loader_version = None  # type: Any
+        self.resolver_exact_paths = []  # type: List[Any]
+        self.resolver_prefix_paths = []  # type: List[Any]
+
+    @property
+    def parser(self):
+        # type: () -> Any
+        if self.loadumper is not None:
+            if hasattr(self.loadumper, 'typ'):
+                return self.loadumper.parser
+            return self.loadumper._parser
+        return None
 
     @classmethod
-    def add_implicit_resolver(cls, tag, regexp, first):
+    def add_implicit_resolver_base(cls, tag, regexp, first):
+        # type: (Any, Any, Any) -> None
         if 'yaml_implicit_resolvers' not in cls.__dict__:
-            cls.yaml_implicit_resolvers = cls.yaml_implicit_resolvers.copy()
+            # deepcopy doesn't work here
+            cls.yaml_implicit_resolvers = dict(
+                (k, cls.yaml_implicit_resolvers[k][:]) for k in cls.yaml_implicit_resolvers
+            )
         if first is None:
             first = [None]
         for ch in first:
-            cls.yaml_implicit_resolvers.setdefault(ch, []).append(
-                (tag, regexp))
+            cls.yaml_implicit_resolvers.setdefault(ch, []).append((tag, regexp))
+
+    @classmethod
+    def add_implicit_resolver(cls, tag, regexp, first):
+        # type: (Any, Any, Any) -> None
+        if 'yaml_implicit_resolvers' not in cls.__dict__:
+            # deepcopy doesn't work here
+            cls.yaml_implicit_resolvers = dict(
+                (k, cls.yaml_implicit_resolvers[k][:]) for k in cls.yaml_implicit_resolvers
+            )
+        if first is None:
+            first = [None]
+        for ch in first:
+            cls.yaml_implicit_resolvers.setdefault(ch, []).append((tag, regexp))
+        implicit_resolvers.append(([(1, 2), (1, 1)], tag, regexp, first))
+
+    # @classmethod
+    # def add_implicit_resolver(cls, tag, regexp, first):
 
     @classmethod
     def add_path_resolver(cls, tag, path, kind=None):
+        # type: (Any, Any, Any) -> None
         # Note: `add_path_resolver` is experimental.  The API could be changed.
         # `new_path` is a pattern that is matched against the path from the
         # root to the node that is being considered.  `node_path` elements are
@@ -63,7 +175,7 @@ def add_path_resolver(cls, tag, path, kind=None):
         # against a sequence value with the index equal to `index_check`.
         if 'yaml_path_resolvers' not in cls.__dict__:
             cls.yaml_path_resolvers = cls.yaml_path_resolvers.copy()
-        new_path = []
+        new_path = []  # type: List[Any]
         for element in path:
             if isinstance(element, (list, tuple)):
                 if len(element) == 2:
@@ -72,7 +184,9 @@ def add_path_resolver(cls, tag, path, kind=None):
                     node_check = element[0]
                     index_check = True
                 else:
-                    raise ResolverError("Invalid path element: %s" % element)
+                    raise ResolverError(
+                        _F('Invalid path element: {element!s}', element=element)
+                    )
             else:
                 node_check = None
                 index_check = element
@@ -82,13 +196,18 @@ def add_path_resolver(cls, tag, path, kind=None):
                 node_check = SequenceNode
             elif node_check is dict:
                 node_check = MappingNode
-            elif node_check not in [ScalarNode, SequenceNode, MappingNode]  \
-                    and not isinstance(node_check, string_types)  \
-                    and node_check is not None:
-                raise ResolverError("Invalid node checker: %s" % node_check)
-            if not isinstance(index_check, (string_types, int))   \
-                    and index_check is not None:
-                raise ResolverError("Invalid index checker: %s" % index_check)
+            elif (
+                node_check not in [ScalarNode, SequenceNode, MappingNode]
+                and not isinstance(node_check, str)
+                and node_check is not None
+            ):
+                raise ResolverError(
+                    _F('Invalid node checker: {node_check!s}', node_check=node_check)
+                )
+            if not isinstance(index_check, (str, int)) and index_check is not None:
+                raise ResolverError(
+                    _F('Invalid index checker: {index_check!s}', index_check=index_check)
+                )
             new_path.append((node_check, index_check))
         if kind is str:
             kind = ScalarNode
@@ -96,12 +215,12 @@ def add_path_resolver(cls, tag, path, kind=None):
             kind = SequenceNode
         elif kind is dict:
             kind = MappingNode
-        elif kind not in [ScalarNode, SequenceNode, MappingNode]    \
-                and kind is not None:
-            raise ResolverError("Invalid node kind: %s" % kind)
+        elif kind not in [ScalarNode, SequenceNode, MappingNode] and kind is not None:
+            raise ResolverError(_F('Invalid node kind: {kind!s}', kind=kind))
         cls.yaml_path_resolvers[tuple(new_path), kind] = tag
 
     def descend_resolver(self, current_node, current_index):
+        # type: (Any, Any) -> None
         if not self.yaml_path_resolvers:
             return
         exact_paths = {}
@@ -109,13 +228,11 @@ def descend_resolver(self, current_node, current_index):
         if current_node:
             depth = len(self.resolver_prefix_paths)
             for path, kind in self.resolver_prefix_paths[-1]:
-                if self.check_resolver_prefix(depth, path, kind,
-                                              current_node, current_index):
+                if self.check_resolver_prefix(depth, path, kind, current_node, current_index):
                     if len(path) > depth:
                         prefix_paths.append((path, kind))
                     else:
-                        exact_paths[kind] = self.yaml_path_resolvers[path,
-                                                                     kind]
+                        exact_paths[kind] = self.yaml_path_resolvers[path, kind]
         else:
             for path, kind in self.yaml_path_resolvers:
                 if not path:
@@ -126,39 +243,40 @@ def descend_resolver(self, current_node, current_index):
         self.resolver_prefix_paths.append(prefix_paths)
 
     def ascend_resolver(self):
+        # type: () -> None
         if not self.yaml_path_resolvers:
             return
         self.resolver_exact_paths.pop()
         self.resolver_prefix_paths.pop()
 
-    def check_resolver_prefix(self, depth, path, kind,
-                              current_node, current_index):
-        node_check, index_check = path[depth-1]
-        if isinstance(node_check, string_types):
+    def check_resolver_prefix(self, depth, path, kind, current_node, current_index):
+        # type: (int, Any, Any, Any, Any) -> bool
+        node_check, index_check = path[depth - 1]
+        if isinstance(node_check, str):
             if current_node.tag != node_check:
-                return
+                return False
         elif node_check is not None:
             if not isinstance(current_node, node_check):
-                return
+                return False
         if index_check is True and current_index is not None:
-            return
-        if (index_check is False or index_check is None)    \
-                and current_index is None:
-            return
-        if isinstance(index_check, string_types):
-            if not (isinstance(current_index, ScalarNode) and
-                    index_check == current_index.value):
-                return
-        elif isinstance(index_check, int) and not isinstance(index_check,
-                                                             bool):
+            return False
+        if (index_check is False or index_check is None) and current_index is None:
+            return False
+        if isinstance(index_check, str):
+            if not (
+                isinstance(current_index, ScalarNode) and index_check == current_index.value
+            ):
+                return False
+        elif isinstance(index_check, int) and not isinstance(index_check, bool):
             if index_check != current_index:
-                return
+                return False
         return True
 
     def resolve(self, kind, value, implicit):
+        # type: (Any, Any, Any) -> Any
         if kind is ScalarNode and implicit[0]:
-            if value == u'':
-                resolvers = self.yaml_implicit_resolvers.get(u'', [])
+            if value == "":
+                resolvers = self.yaml_implicit_resolvers.get("", [])
             else:
                 resolvers = self.yaml_implicit_resolvers.get(value[0], [])
             resolvers += self.yaml_implicit_resolvers.get(None, [])
@@ -166,7 +284,7 @@ def resolve(self, kind, value, implicit):
                 if regexp.match(value):
                     return tag
             implicit = implicit[1]
-        if self.yaml_path_resolvers:
+        if bool(self.yaml_path_resolvers):
             exact_paths = self.resolver_exact_paths[-1]
             if kind in exact_paths:
                 return exact_paths[kind]
@@ -181,158 +299,37 @@ def resolve(self, kind, value, implicit):
 
     @property
     def processing_version(self):
+        # type: () -> Any
         return None
 
 
 class Resolver(BaseResolver):
     pass
 
-Resolver.add_implicit_resolver(
-    u'tag:yaml.org,2002:bool',
-    re.compile(u'''^(?:yes|Yes|YES|no|No|NO
-    |true|True|TRUE|false|False|FALSE
-    |on|On|ON|off|Off|OFF)$''', re.X),
-    list(u'yYnNtTfFoO'))
 
-Resolver.add_implicit_resolver(
-    u'tag:yaml.org,2002:float',
-    re.compile(u'''^(?:
-     [-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+]?[0-9]+)?
-    |[-+]?(?:[0-9][0-9_]*)(?:[eE][-+]?[0-9]+)
-    |\\.[0-9_]+(?:[eE][-+][0-9]+)?
-    |[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*
-    |[-+]?\\.(?:inf|Inf|INF)
-    |\\.(?:nan|NaN|NAN))$''', re.X),
-    list(u'-+0123456789.'))
-
-Resolver.add_implicit_resolver(
-    u'tag:yaml.org,2002:int',
-    re.compile(u'''^(?:[-+]?0b[0-1_]+
-    |[-+]?0o?[0-7_]+
-    |[-+]?(?:0|[1-9][0-9_]*)
-    |[-+]?0x[0-9a-fA-F_]+
-    |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),
-    list(u'-+0123456789'))
-
-Resolver.add_implicit_resolver(
-    u'tag:yaml.org,2002:merge',
-    re.compile(u'^(?:<<)$'),
-    [u'<'])
-
-Resolver.add_implicit_resolver(
-    u'tag:yaml.org,2002:null',
-    re.compile(u'''^(?: ~
-    |null|Null|NULL
-    | )$''', re.X),
-    [u'~', u'n', u'N', u''])
-
-Resolver.add_implicit_resolver(
-    u'tag:yaml.org,2002:timestamp',
-    re.compile(u'''^(?:[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]
-    |[0-9][0-9][0-9][0-9] -[0-9][0-9]? -[0-9][0-9]?
-    (?:[Tt]|[ \\t]+)[0-9][0-9]?
-    :[0-9][0-9] :[0-9][0-9] (?:\\.[0-9]*)?
-    (?:[ \\t]*(?:Z|[-+][0-9][0-9]?(?::[0-9][0-9])?))?)$''', re.X),
-    list(u'0123456789'))
-
-Resolver.add_implicit_resolver(
-    u'tag:yaml.org,2002:value',
-    re.compile(u'^(?:=)$'),
-    [u'='])
-
-# The following resolver is only for documentation purposes. It cannot work
-# because plain scalars cannot start with '!', '&', or '*'.
-Resolver.add_implicit_resolver(
-    u'tag:yaml.org,2002:yaml',
-    re.compile(u'^(?:!|&|\\*)$'),
-    list(u'!&*'))
-
-# resolvers consist of
-# - a list of applicable version
-# - a tag
-# - a regexp
-# - a list of first characters to match
-implicit_resolvers = [
-    ([(1, 2)],
-        u'tag:yaml.org,2002:bool',
-        re.compile(u'''^(?:true|True|TRUE|false|False|FALSE)$''', re.X),
-        list(u'tTfF')),
-    ([(1, 1)],
-        u'tag:yaml.org,2002:bool',
-        re.compile(u'''^(?:yes|Yes|YES|no|No|NO
-        |true|True|TRUE|false|False|FALSE
-        |on|On|ON|off|Off|OFF)$''', re.X),
-        list(u'yYnNtTfFoO')),
-    ([(1, 2), (1, 1)],
-        u'tag:yaml.org,2002:float',
-        re.compile(u'''^(?:
-         [-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+]?[0-9]+)?
-        |[-+]?(?:[0-9][0-9_]*)(?:[eE][-+]?[0-9]+)
-        |\\.[0-9_]+(?:[eE][-+][0-9]+)?
-        |[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*
-        |[-+]?\\.(?:inf|Inf|INF)
-        |\\.(?:nan|NaN|NAN))$''', re.X),
-        list(u'-+0123456789.')),
-    ([(1, 2)],
-        u'tag:yaml.org,2002:int',
-        re.compile(u'''^(?:[-+]?0b[0-1_]+
-        |[-+]?0o?[0-7_]+
-        |[-+]?(?:0|[1-9][0-9_]*)
-        |[-+]?0x[0-9a-fA-F_]+)$''', re.X),
-        list(u'-+0123456789')),
-    ([(1, 1)],
-        u'tag:yaml.org,2002:int',
-        re.compile(u'''^(?:[-+]?0b[0-1_]+
-        |[-+]?0o?[0-7_]+
-        |[-+]?(?:0|[1-9][0-9_]*)
-        |[-+]?0x[0-9a-fA-F_]+
-        |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),
-        list(u'-+0123456789')),
-    ([(1, 2), (1, 1)],
-        u'tag:yaml.org,2002:merge',
-        re.compile(u'^(?:<<)$'),
-        [u'<']),
-    ([(1, 2), (1, 1)],
-        u'tag:yaml.org,2002:null',
-        re.compile(u'''^(?: ~
-        |null|Null|NULL
-        | )$''', re.X),
-        [u'~', u'n', u'N', u'']),
-    ([(1, 2), (1, 1)],
-        u'tag:yaml.org,2002:timestamp',
-        re.compile(u'''^(?:[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]
-        |[0-9][0-9][0-9][0-9] -[0-9][0-9]? -[0-9][0-9]?
-        (?:[Tt]|[ \\t]+)[0-9][0-9]?
-        :[0-9][0-9] :[0-9][0-9] (?:\\.[0-9]*)?
-        (?:[ \\t]*(?:Z|[-+][0-9][0-9]?(?::[0-9][0-9])?))?)$''', re.X),
-        list(u'0123456789')),
-    ([(1, 2), (1, 1)],
-        u'tag:yaml.org,2002:value',
-        re.compile(u'^(?:=)$'),
-        [u'=']),
-    # The following resolver is only for documentation purposes. It cannot work
-    # because plain scalars cannot start with '!', '&', or '*'.
-    ([(1, 2), (1, 1)],
-        u'tag:yaml.org,2002:yaml',
-        re.compile(u'^(?:!|&|\\*)$'),
-        list(u'!&*')),
-]
+for ir in implicit_resolvers:
+    if (1, 2) in ir[0]:
+        Resolver.add_implicit_resolver_base(*ir[1:])
 
 
 class VersionedResolver(BaseResolver):
     """
     contrary to the "normal" resolver, the smart resolver delays loading
     the pattern matching rules. That way it can decide to load 1.1 rules
-    or the (default) 1.2 that no longer support octal without 0o, sexagesimals
+    or the (default) 1.2 rules, that no longer support octal without 0o, sexagesimals
     and Yes/No/On/Off booleans.
     """
 
-    def __init__(self, version=None):
-        BaseResolver.__init__(self)
+    def __init__(self, version=None, loader=None, loadumper=None):
+        # type: (Optional[VersionType], Any, Any) -> None
+        if loader is None and loadumper is not None:
+            loader = loadumper
+        BaseResolver.__init__(self, loader)
         self._loader_version = self.get_loader_version(version)
-        self._version_implicit_resolver = {}
+        self._version_implicit_resolver = {}  # type: Dict[Any, Any]
 
     def add_version_implicit_resolver(self, version, tag, regexp, first):
+        # type: (VersionType, Any, Any, Any) -> None
         if first is None:
             first = [None]
         impl_resolver = self._version_implicit_resolver.setdefault(version, {})
@@ -340,19 +337,23 @@ def add_version_implicit_resolver(self, version, tag, regexp, first):
             impl_resolver.setdefault(ch, []).append((tag, regexp))
 
     def get_loader_version(self, version):
+        # type: (Optional[VersionType]) -> Any
         if version is None or isinstance(version, tuple):
             return version
         if isinstance(version, list):
             return tuple(version)
         # assume string
-        return tuple(map(int, version.split(u'.')))
+        return tuple(map(int, version.split('.')))
 
     @property
-    def resolver(self):
+    def versioned_resolver(self):
+        # type: () -> Any
         """
         select the resolver based on the version we are parsing
         """
         version = self.processing_version
+        if isinstance(version, str):
+            version = tuple(map(int, version.split('.')))
         if version not in self._version_implicit_resolver:
             for x in implicit_resolvers:
                 if version in x[0]:
@@ -360,17 +361,18 @@ def resolver(self):
         return self._version_implicit_resolver[version]
 
     def resolve(self, kind, value, implicit):
+        # type: (Any, Any, Any) -> Any
         if kind is ScalarNode and implicit[0]:
-            if value == u'':
-                resolvers = self.resolver.get(u'', [])
+            if value == "":
+                resolvers = self.versioned_resolver.get("", [])
             else:
-                resolvers = self.resolver.get(value[0], [])
-            resolvers += self.resolver.get(None, [])
+                resolvers = self.versioned_resolver.get(value[0], [])
+            resolvers += self.versioned_resolver.get(None, [])
             for tag, regexp in resolvers:
                 if regexp.match(value):
                     return tag
             implicit = implicit[1]
-        if self.yaml_path_resolvers:
+        if bool(self.yaml_path_resolvers):
             exact_paths = self.resolver_exact_paths[-1]
             if kind in exact_paths:
                 return exact_paths[kind]
@@ -385,13 +387,19 @@ def resolve(self, kind, value, implicit):
 
     @property
     def processing_version(self):
+        # type: () -> Any
         try:
-            version = self.yaml_version
+            version = self.loadumper._scanner.yaml_version
         except AttributeError:
-            # dumping
-            version = self.use_version
+            try:
+                if hasattr(self.loadumper, 'typ'):
+                    version = self.loadumper.version
+                else:
+                    version = self.loadumper._serializer.use_version  # dumping
+            except AttributeError:
+                version = None
         if version is None:
             version = self._loader_version
             if version is None:
-                version = _DEFAULT_VERSION
+                version = _DEFAULT_YAML_VERSION
         return version

lib/spack/external/_vendoring/ruamel/yaml/scalarbool.py

@@ -0,0 +1,47 @@
+# coding: utf-8
+
+"""
+You cannot subclass bool, and this is necessary for round-tripping anchored
+bool values (and also if you want to preserve the original way of writing)
+
+bool.__bases__ is type 'int', so that is what is used as the basis for ScalarBoolean as well.
+
+You can use these in an if statement, but not when testing equivalence
+"""
+
+from ruamel.yaml.anchor import Anchor
+
+if False:  # MYPY
+    from typing import Text, Any, Dict, List  # NOQA
+
+__all__ = ['ScalarBoolean']
+
+
+class ScalarBoolean(int):
+    def __new__(cls, *args, **kw):
+        # type: (Any, Any, Any) -> Any
+        anchor = kw.pop('anchor', None)
+        b = int.__new__(cls, *args, **kw)
+        if anchor is not None:
+            b.yaml_set_anchor(anchor, always_dump=True)
+        return b
+
+    @property
+    def anchor(self):
+        # type: () -> Any
+        if not hasattr(self, Anchor.attrib):
+            setattr(self, Anchor.attrib, Anchor())
+        return getattr(self, Anchor.attrib)
+
+    def yaml_anchor(self, any=False):
+        # type: (bool) -> Any
+        if not hasattr(self, Anchor.attrib):
+            return None
+        if any or self.anchor.always_dump:
+            return self.anchor
+        return None
+
+    def yaml_set_anchor(self, value, always_dump=False):
+        # type: (Any, bool) -> None
+        self.anchor.value = value
+        self.anchor.always_dump = always_dump

lib/spack/external/_vendoring/ruamel/yaml/scalarfloat.py

@@ -0,0 +1,124 @@
+# coding: utf-8
+
+import sys
+from ruamel.yaml.anchor import Anchor
+
+if False:  # MYPY
+    from typing import Text, Any, Dict, List  # NOQA
+
+__all__ = ['ScalarFloat', 'ExponentialFloat', 'ExponentialCapsFloat']
+
+
+class ScalarFloat(float):
+    def __new__(cls, *args, **kw):
+        # type: (Any, Any, Any) -> Any
+        width = kw.pop('width', None)
+        prec = kw.pop('prec', None)
+        m_sign = kw.pop('m_sign', None)
+        m_lead0 = kw.pop('m_lead0', 0)
+        exp = kw.pop('exp', None)
+        e_width = kw.pop('e_width', None)
+        e_sign = kw.pop('e_sign', None)
+        underscore = kw.pop('underscore', None)
+        anchor = kw.pop('anchor', None)
+        v = float.__new__(cls, *args, **kw)
+        v._width = width
+        v._prec = prec
+        v._m_sign = m_sign
+        v._m_lead0 = m_lead0
+        v._exp = exp
+        v._e_width = e_width
+        v._e_sign = e_sign
+        v._underscore = underscore
+        if anchor is not None:
+            v.yaml_set_anchor(anchor, always_dump=True)
+        return v
+
+    def __iadd__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        return float(self) + a
+        x = type(self)(self + a)
+        x._width = self._width
+        x._underscore = self._underscore[:] if self._underscore is not None else None  # NOQA
+        return x
+
+    def __ifloordiv__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        return float(self) // a
+        x = type(self)(self // a)
+        x._width = self._width
+        x._underscore = self._underscore[:] if self._underscore is not None else None  # NOQA
+        return x
+
+    def __imul__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        return float(self) * a
+        x = type(self)(self * a)
+        x._width = self._width
+        x._underscore = self._underscore[:] if self._underscore is not None else None  # NOQA
+        x._prec = self._prec  # check for others
+        return x
+
+    def __ipow__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        return float(self) ** a
+        x = type(self)(self ** a)
+        x._width = self._width
+        x._underscore = self._underscore[:] if self._underscore is not None else None  # NOQA
+        return x
+
+    def __isub__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        return float(self) - a
+        x = type(self)(self - a)
+        x._width = self._width
+        x._underscore = self._underscore[:] if self._underscore is not None else None  # NOQA
+        return x
+
+    @property
+    def anchor(self):
+        # type: () -> Any
+        if not hasattr(self, Anchor.attrib):
+            setattr(self, Anchor.attrib, Anchor())
+        return getattr(self, Anchor.attrib)
+
+    def yaml_anchor(self, any=False):
+        # type: (bool) -> Any
+        if not hasattr(self, Anchor.attrib):
+            return None
+        if any or self.anchor.always_dump:
+            return self.anchor
+        return None
+
+    def yaml_set_anchor(self, value, always_dump=False):
+        # type: (Any, bool) -> None
+        self.anchor.value = value
+        self.anchor.always_dump = always_dump
+
+    def dump(self, out=sys.stdout):
+        # type: (Any) -> Any
+        out.write(
+            'ScalarFloat({}| w:{}, p:{}, s:{}, lz:{}, _:{}|{}, w:{}, s:{})\n'.format(
+                self,
+                self._width,  # type: ignore
+                self._prec,  # type: ignore
+                self._m_sign,  # type: ignore
+                self._m_lead0,  # type: ignore
+                self._underscore,  # type: ignore
+                self._exp,  # type: ignore
+                self._e_width,  # type: ignore
+                self._e_sign,  # type: ignore
+            )
+        )
+
+
+class ExponentialFloat(ScalarFloat):
+    def __new__(cls, value, width=None, underscore=None):
+        # type: (Any, Any, Any) -> Any
+        return ScalarFloat.__new__(cls, value, width=width, underscore=underscore)
+
+
+class ExponentialCapsFloat(ScalarFloat):
+    def __new__(cls, value, width=None, underscore=None):
+        # type: (Any, Any, Any) -> Any
+        return ScalarFloat.__new__(cls, value, width=width, underscore=underscore)

lib/spack/external/_vendoring/ruamel/yaml/scalarint.py

@@ -0,0 +1,127 @@
+# coding: utf-8
+
+from ruamel.yaml.anchor import Anchor
+
+if False:  # MYPY
+    from typing import Text, Any, Dict, List  # NOQA
+
+__all__ = ['ScalarInt', 'BinaryInt', 'OctalInt', 'HexInt', 'HexCapsInt', 'DecimalInt']
+
+
+class ScalarInt(int):
+    def __new__(cls, *args, **kw):
+        # type: (Any, Any, Any) -> Any
+        width = kw.pop('width', None)
+        underscore = kw.pop('underscore', None)
+        anchor = kw.pop('anchor', None)
+        v = int.__new__(cls, *args, **kw)
+        v._width = width
+        v._underscore = underscore
+        if anchor is not None:
+            v.yaml_set_anchor(anchor, always_dump=True)
+        return v
+
+    def __iadd__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        x = type(self)(self + a)
+        x._width = self._width  # type: ignore
+        x._underscore = (  # type: ignore
+            self._underscore[:] if self._underscore is not None else None  # type: ignore
+        )  # NOQA
+        return x
+
+    def __ifloordiv__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        x = type(self)(self // a)
+        x._width = self._width  # type: ignore
+        x._underscore = (  # type: ignore
+            self._underscore[:] if self._underscore is not None else None  # type: ignore
+        )  # NOQA
+        return x
+
+    def __imul__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        x = type(self)(self * a)
+        x._width = self._width  # type: ignore
+        x._underscore = (  # type: ignore
+            self._underscore[:] if self._underscore is not None else None  # type: ignore
+        )  # NOQA
+        return x
+
+    def __ipow__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        x = type(self)(self ** a)
+        x._width = self._width  # type: ignore
+        x._underscore = (  # type: ignore
+            self._underscore[:] if self._underscore is not None else None  # type: ignore
+        )  # NOQA
+        return x
+
+    def __isub__(self, a):  # type: ignore
+        # type: (Any) -> Any
+        x = type(self)(self - a)
+        x._width = self._width  # type: ignore
+        x._underscore = (  # type: ignore
+            self._underscore[:] if self._underscore is not None else None  # type: ignore
+        )  # NOQA
+        return x
+
+    @property
+    def anchor(self):
+        # type: () -> Any
+        if not hasattr(self, Anchor.attrib):
+            setattr(self, Anchor.attrib, Anchor())
+        return getattr(self, Anchor.attrib)
+
+    def yaml_anchor(self, any=False):
+        # type: (bool) -> Any
+        if not hasattr(self, Anchor.attrib):
+            return None
+        if any or self.anchor.always_dump:
+            return self.anchor
+        return None
+
+    def yaml_set_anchor(self, value, always_dump=False):
+        # type: (Any, bool) -> None
+        self.anchor.value = value
+        self.anchor.always_dump = always_dump
+
+
+class BinaryInt(ScalarInt):
+    def __new__(cls, value, width=None, underscore=None, anchor=None):
+        # type: (Any, Any, Any, Any) -> Any
+        return ScalarInt.__new__(cls, value, width=width, underscore=underscore, anchor=anchor)
+
+
+class OctalInt(ScalarInt):
+    def __new__(cls, value, width=None, underscore=None, anchor=None):
+        # type: (Any, Any, Any, Any) -> Any
+        return ScalarInt.__new__(cls, value, width=width, underscore=underscore, anchor=anchor)
+
+
+# mixed casing of A-F is not supported, when loading the first non digit
+# determines the case
+
+
+class HexInt(ScalarInt):
+    """uses lower case (a-f)"""
+
+    def __new__(cls, value, width=None, underscore=None, anchor=None):
+        # type: (Any, Any, Any, Any) -> Any
+        return ScalarInt.__new__(cls, value, width=width, underscore=underscore, anchor=anchor)
+
+
+class HexCapsInt(ScalarInt):
+    """uses upper case (A-F)"""
+
+    def __new__(cls, value, width=None, underscore=None, anchor=None):
+        # type: (Any, Any, Any, Any) -> Any
+        return ScalarInt.__new__(cls, value, width=width, underscore=underscore, anchor=anchor)
+
+
+class DecimalInt(ScalarInt):
+    """needed if anchor"""
+
+    def __new__(cls, value, width=None, underscore=None, anchor=None):
+        # type: (Any, Any, Any, Any) -> Any
+        return ScalarInt.__new__(cls, value, width=width, underscore=underscore, anchor=anchor)

lib/spack/external/_vendoring/ruamel/yaml/scalarstring.py

@@ -0,0 +1,152 @@
+# coding: utf-8
+
+from ruamel.yaml.anchor import Anchor
+
+if False:  # MYPY
+    from typing import Text, Any, Dict, List  # NOQA
+
+__all__ = [
+    'ScalarString',
+    'LiteralScalarString',
+    'FoldedScalarString',
+    'SingleQuotedScalarString',
+    'DoubleQuotedScalarString',
+    'PlainScalarString',
+    # PreservedScalarString is the old name, as it was the first to be preserved on rt,
+    # use LiteralScalarString instead
+    'PreservedScalarString',
+]
+
+
+class ScalarString(str):
+    __slots__ = Anchor.attrib
+
+    def __new__(cls, *args, **kw):
+        # type: (Any, Any) -> Any
+        anchor = kw.pop('anchor', None)
+        ret_val = str.__new__(cls, *args, **kw)
+        if anchor is not None:
+            ret_val.yaml_set_anchor(anchor, always_dump=True)
+        return ret_val
+
+    def replace(self, old, new, maxreplace=-1):
+        # type: (Any, Any, int) -> Any
+        return type(self)((str.replace(self, old, new, maxreplace)))
+
+    @property
+    def anchor(self):
+        # type: () -> Any
+        if not hasattr(self, Anchor.attrib):
+            setattr(self, Anchor.attrib, Anchor())
+        return getattr(self, Anchor.attrib)
+
+    def yaml_anchor(self, any=False):
+        # type: (bool) -> Any
+        if not hasattr(self, Anchor.attrib):
+            return None
+        if any or self.anchor.always_dump:
+            return self.anchor
+        return None
+
+    def yaml_set_anchor(self, value, always_dump=False):
+        # type: (Any, bool) -> None
+        self.anchor.value = value
+        self.anchor.always_dump = always_dump
+
+
+class LiteralScalarString(ScalarString):
+    __slots__ = 'comment'  # the comment after the | on the first line
+
+    style = '|'
+
+    def __new__(cls, value, anchor=None):
+        # type: (Text, Any) -> Any
+        return ScalarString.__new__(cls, value, anchor=anchor)
+
+
+PreservedScalarString = LiteralScalarString
+
+
+class FoldedScalarString(ScalarString):
+    __slots__ = ('fold_pos', 'comment')  # the comment after the > on the first line
+
+    style = '>'
+
+    def __new__(cls, value, anchor=None):
+        # type: (Text, Any) -> Any
+        return ScalarString.__new__(cls, value, anchor=anchor)
+
+
+class SingleQuotedScalarString(ScalarString):
+    __slots__ = ()
+
+    style = "'"
+
+    def __new__(cls, value, anchor=None):
+        # type: (Text, Any) -> Any
+        return ScalarString.__new__(cls, value, anchor=anchor)
+
+
+class DoubleQuotedScalarString(ScalarString):
+    __slots__ = ()
+
+    style = '"'
+
+    def __new__(cls, value, anchor=None):
+        # type: (Text, Any) -> Any
+        return ScalarString.__new__(cls, value, anchor=anchor)
+
+
+class PlainScalarString(ScalarString):
+    __slots__ = ()
+
+    style = ''
+
+    def __new__(cls, value, anchor=None):
+        # type: (Text, Any) -> Any
+        return ScalarString.__new__(cls, value, anchor=anchor)
+
+
+def preserve_literal(s):
+    # type: (Text) -> Text
+    return LiteralScalarString(s.replace('\r\n', '\n').replace('\r', '\n'))
+
+
+def walk_tree(base, map=None):
+    # type: (Any, Any) -> None
+    """
+    the routine here walks over a simple yaml tree (recursing in
+    dict values and list items) and converts strings that
+    have multiple lines to literal scalars
+
+    You can also provide an explicit (ordered) mapping for multiple transforms
+    (first of which is executed):
+        map = ruamel.yaml.compat.ordereddict
+        map['\n'] = preserve_literal
+        map[':'] = SingleQuotedScalarString
+        walk_tree(data, map=map)
+    """
+    from collections.abc import MutableMapping, MutableSequence
+
+    if map is None:
+        map = {'\n': preserve_literal}
+
+    if isinstance(base, MutableMapping):
+        for k in base:
+            v = base[k]  # type: Text
+            if isinstance(v, str):
+                for ch in map:
+                    if ch in v:
+                        base[k] = map[ch](v)
+                        break
+            else:
+                walk_tree(v, map=map)
+    elif isinstance(base, MutableSequence):
+        for idx, elem in enumerate(base):
+            if isinstance(elem, str):
+                for ch in map:
+                    if ch in elem:
+                        base[idx] = map[ch](elem)
+                        break
+            else:
+                walk_tree(elem, map=map)

lib/spack/external/_vendoring/ruamel/yaml/serializer.py

@@ -0,0 +1,241 @@
+# coding: utf-8
+
+from ruamel.yaml.error import YAMLError
+from ruamel.yaml.compat import nprint, DBG_NODE, dbg, nprintf  # NOQA
+from ruamel.yaml.util import RegExp
+
+from ruamel.yaml.events import (
+    StreamStartEvent,
+    StreamEndEvent,
+    MappingStartEvent,
+    MappingEndEvent,
+    SequenceStartEvent,
+    SequenceEndEvent,
+    AliasEvent,
+    ScalarEvent,
+    DocumentStartEvent,
+    DocumentEndEvent,
+)
+from ruamel.yaml.nodes import MappingNode, ScalarNode, SequenceNode
+
+if False:  # MYPY
+    from typing import Any, Dict, Union, Text, Optional  # NOQA
+    from ruamel.yaml.compat import VersionType  # NOQA
+
+__all__ = ['Serializer', 'SerializerError']
+
+
+class SerializerError(YAMLError):
+    pass
+
+
+class Serializer:
+
+    # 'id' and 3+ numbers, but not 000
+    ANCHOR_TEMPLATE = 'id%03d'
+    ANCHOR_RE = RegExp('id(?!000$)\\d{3,}')
+
+    def __init__(
+        self,
+        encoding=None,
+        explicit_start=None,
+        explicit_end=None,
+        version=None,
+        tags=None,
+        dumper=None,
+    ):
+        # type: (Any, Optional[bool], Optional[bool], Optional[VersionType], Any, Any) -> None  # NOQA
+        self.dumper = dumper
+        if self.dumper is not None:
+            self.dumper._serializer = self
+        self.use_encoding = encoding
+        self.use_explicit_start = explicit_start
+        self.use_explicit_end = explicit_end
+        if isinstance(version, str):
+            self.use_version = tuple(map(int, version.split('.')))
+        else:
+            self.use_version = version  # type: ignore
+        self.use_tags = tags
+        self.serialized_nodes = {}  # type: Dict[Any, Any]
+        self.anchors = {}  # type: Dict[Any, Any]
+        self.last_anchor_id = 0
+        self.closed = None  # type: Optional[bool]
+        self._templated_id = None
+
+    @property
+    def emitter(self):
+        # type: () -> Any
+        if hasattr(self.dumper, 'typ'):
+            return self.dumper.emitter
+        return self.dumper._emitter
+
+    @property
+    def resolver(self):
+        # type: () -> Any
+        if hasattr(self.dumper, 'typ'):
+            self.dumper.resolver
+        return self.dumper._resolver
+
+    def open(self):
+        # type: () -> None
+        if self.closed is None:
+            self.emitter.emit(StreamStartEvent(encoding=self.use_encoding))
+            self.closed = False
+        elif self.closed:
+            raise SerializerError('serializer is closed')
+        else:
+            raise SerializerError('serializer is already opened')
+
+    def close(self):
+        # type: () -> None
+        if self.closed is None:
+            raise SerializerError('serializer is not opened')
+        elif not self.closed:
+            self.emitter.emit(StreamEndEvent())
+            self.closed = True
+
+    # def __del__(self):
+    #     self.close()
+
+    def serialize(self, node):
+        # type: (Any) -> None
+        if dbg(DBG_NODE):
+            nprint('Serializing nodes')
+            node.dump()
+        if self.closed is None:
+            raise SerializerError('serializer is not opened')
+        elif self.closed:
+            raise SerializerError('serializer is closed')
+        self.emitter.emit(
+            DocumentStartEvent(
+                explicit=self.use_explicit_start, version=self.use_version, tags=self.use_tags
+            )
+        )
+        self.anchor_node(node)
+        self.serialize_node(node, None, None)
+        self.emitter.emit(DocumentEndEvent(explicit=self.use_explicit_end))
+        self.serialized_nodes = {}
+        self.anchors = {}
+        self.last_anchor_id = 0
+
+    def anchor_node(self, node):
+        # type: (Any) -> None
+        if node in self.anchors:
+            if self.anchors[node] is None:
+                self.anchors[node] = self.generate_anchor(node)
+        else:
+            anchor = None
+            try:
+                if node.anchor.always_dump:
+                    anchor = node.anchor.value
+            except:  # NOQA
+                pass
+            self.anchors[node] = anchor
+            if isinstance(node, SequenceNode):
+                for item in node.value:
+                    self.anchor_node(item)
+            elif isinstance(node, MappingNode):
+                for key, value in node.value:
+                    self.anchor_node(key)
+                    self.anchor_node(value)
+
+    def generate_anchor(self, node):
+        # type: (Any) -> Any
+        try:
+            anchor = node.anchor.value
+        except:  # NOQA
+            anchor = None
+        if anchor is None:
+            self.last_anchor_id += 1
+            return self.ANCHOR_TEMPLATE % self.last_anchor_id
+        return anchor
+
+    def serialize_node(self, node, parent, index):
+        # type: (Any, Any, Any) -> None
+        alias = self.anchors[node]
+        if node in self.serialized_nodes:
+            node_style = getattr(node, 'style', None)
+            if node_style != '?':
+                node_style = None
+            self.emitter.emit(AliasEvent(alias, style=node_style))
+        else:
+            self.serialized_nodes[node] = True
+            self.resolver.descend_resolver(parent, index)
+            if isinstance(node, ScalarNode):
+                # here check if the node.tag equals the one that would result from parsing
+                # if not equal quoting is necessary for strings
+                detected_tag = self.resolver.resolve(ScalarNode, node.value, (True, False))
+                default_tag = self.resolver.resolve(ScalarNode, node.value, (False, True))
+                implicit = (
+                    (node.tag == detected_tag),
+                    (node.tag == default_tag),
+                    node.tag.startswith('tag:yaml.org,2002:'),
+                )
+                self.emitter.emit(
+                    ScalarEvent(
+                        alias,
+                        node.tag,
+                        implicit,
+                        node.value,
+                        style=node.style,
+                        comment=node.comment,
+                    )
+                )
+            elif isinstance(node, SequenceNode):
+                implicit = node.tag == self.resolver.resolve(SequenceNode, node.value, True)
+                comment = node.comment
+                end_comment = None
+                seq_comment = None
+                if node.flow_style is True:
+                    if comment:  # eol comment on flow style sequence
+                        seq_comment = comment[0]
+                        # comment[0] = None
+                if comment and len(comment) > 2:
+                    end_comment = comment[2]
+                else:
+                    end_comment = None
+                self.emitter.emit(
+                    SequenceStartEvent(
+                        alias,
+                        node.tag,
+                        implicit,
+                        flow_style=node.flow_style,
+                        comment=node.comment,
+                    )
+                )
+                index = 0
+                for item in node.value:
+                    self.serialize_node(item, node, index)
+                    index += 1
+                self.emitter.emit(SequenceEndEvent(comment=[seq_comment, end_comment]))
+            elif isinstance(node, MappingNode):
+                implicit = node.tag == self.resolver.resolve(MappingNode, node.value, True)
+                comment = node.comment
+                end_comment = None
+                map_comment = None
+                if node.flow_style is True:
+                    if comment:  # eol comment on flow style sequence
+                        map_comment = comment[0]
+                        # comment[0] = None
+                if comment and len(comment) > 2:
+                    end_comment = comment[2]
+                self.emitter.emit(
+                    MappingStartEvent(
+                        alias,
+                        node.tag,
+                        implicit,
+                        flow_style=node.flow_style,
+                        comment=node.comment,
+                        nr_items=len(node.value),
+                    )
+                )
+                for key, value in node.value:
+                    self.serialize_node(key, node, None)
+                    self.serialize_node(value, node, key)
+                self.emitter.emit(MappingEndEvent(comment=[map_comment, end_comment]))
+            self.resolver.ascend_resolver()
+
+
+def templated_id(s):
+    # type: (Text) -> Any
+    return Serializer.ANCHOR_RE.match(s)

lib/spack/external/_vendoring/ruamel/yaml/timestamp.py

@@ -0,0 +1,61 @@
+# coding: utf-8
+
+import datetime
+import copy
+
+# ToDo: at least on PY3 you could probably attach the tzinfo correctly to the object
+#       a more complete datetime might be used by safe loading as well
+
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List  # NOQA
+
+
+class TimeStamp(datetime.datetime):
+    def __init__(self, *args, **kw):
+        # type: (Any, Any) -> None
+        self._yaml = dict(t=False, tz=None, delta=0)  # type: Dict[Any, Any]
+
+    def __new__(cls, *args, **kw):  # datetime is immutable
+        # type: (Any, Any) -> Any
+        return datetime.datetime.__new__(cls, *args, **kw)
+
+    def __deepcopy__(self, memo):
+        # type: (Any) -> Any
+        ts = TimeStamp(self.year, self.month, self.day, self.hour, self.minute, self.second)
+        ts._yaml = copy.deepcopy(self._yaml)
+        return ts
+
+    def replace(
+        self,
+        year=None,
+        month=None,
+        day=None,
+        hour=None,
+        minute=None,
+        second=None,
+        microsecond=None,
+        tzinfo=True,
+        fold=None,
+    ):
+        # type: (Any, Any, Any, Any, Any, Any, Any, Any, Any) -> Any
+        if year is None:
+            year = self.year
+        if month is None:
+            month = self.month
+        if day is None:
+            day = self.day
+        if hour is None:
+            hour = self.hour
+        if minute is None:
+            minute = self.minute
+        if second is None:
+            second = self.second
+        if microsecond is None:
+            microsecond = self.microsecond
+        if tzinfo is True:
+            tzinfo = self.tzinfo
+        if fold is None:
+            fold = self.fold
+        ts = type(self)(year, month, day, hour, minute, second, microsecond, tzinfo, fold=fold)
+        ts._yaml = copy.deepcopy(self._yaml)
+        return ts

lib/spack/external/_vendoring/ruamel/yaml/tokens.py

@@ -0,0 +1,404 @@
+# coding: utf-8
+
+from ruamel.yaml.compat import _F, nprintf  # NOQA
+
+if False:  # MYPY
+    from typing import Text, Any, Dict, Optional, List  # NOQA
+    from .error import StreamMark  # NOQA
+
+SHOW_LINES = True
+
+
+class Token:
+    __slots__ = 'start_mark', 'end_mark', '_comment'
+
+    def __init__(self, start_mark, end_mark):
+        # type: (StreamMark, StreamMark) -> None
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+    def __repr__(self):
+        # type: () -> Any
+        # attributes = [key for key in self.__slots__ if not key.endswith('_mark') and
+        #               hasattr('self', key)]
+        attributes = [key for key in self.__slots__ if not key.endswith('_mark')]
+        attributes.sort()
+        # arguments = ', '.join(
+        #  [_F('{key!s}={gattr!r})', key=key, gattr=getattr(self, key)) for key in attributes]
+        # )
+        arguments = [
+            _F('{key!s}={gattr!r}', key=key, gattr=getattr(self, key)) for key in attributes
+        ]
+        if SHOW_LINES:
+            try:
+                arguments.append('line: ' + str(self.start_mark.line))
+            except:  # NOQA
+                pass
+        try:
+            arguments.append('comment: ' + str(self._comment))
+        except:  # NOQA
+            pass
+        return '{}({})'.format(self.__class__.__name__, ', '.join(arguments))
+
+    @property
+    def column(self):
+        # type: () -> int
+        return self.start_mark.column
+
+    @column.setter
+    def column(self, pos):
+        # type: (Any) -> None
+        self.start_mark.column = pos
+
+    # old style ( <= 0.17) is a TWO element list with first being the EOL
+    # comment concatenated with following FLC/BLNK; and second being a list of FLC/BLNK
+    # preceding the token
+    # new style ( >= 0.17 ) is a THREE element list with the first being a list of
+    # preceding FLC/BLNK, the second EOL and the third following FLC/BLNK
+    # note that new style has differing order, and does not consist of CommentToken(s)
+    # but of CommentInfo instances
+    # any non-assigned values in new style are None, but first and last can be empty list
+    # new style routines add one comment at a time
+
+    # going to be deprecated in favour of add_comment_eol/post
+    def add_post_comment(self, comment):
+        # type: (Any) -> None
+        if not hasattr(self, '_comment'):
+            self._comment = [None, None]
+        else:
+            assert len(self._comment) in [2, 5]  # make sure it is version 0
+        # if isinstance(comment, CommentToken):
+        #    if comment.value.startswith('# C09'):
+        #        raise
+        self._comment[0] = comment
+
+    # going to be deprecated in favour of add_comment_pre
+    def add_pre_comments(self, comments):
+        # type: (Any) -> None
+        if not hasattr(self, '_comment'):
+            self._comment = [None, None]
+        else:
+            assert len(self._comment) == 2  # make sure it is version 0
+        assert self._comment[1] is None
+        self._comment[1] = comments
+        return
+
+    # new style
+    def add_comment_pre(self, comment):
+        # type: (Any) -> None
+        if not hasattr(self, '_comment'):
+            self._comment = [[], None, None]  # type: ignore
+        else:
+            assert len(self._comment) == 3
+            if self._comment[0] is None:
+                self._comment[0] = []  # type: ignore
+        self._comment[0].append(comment)  # type: ignore
+
+    def add_comment_eol(self, comment, comment_type):
+        # type: (Any, Any) -> None
+        if not hasattr(self, '_comment'):
+            self._comment = [None, None, None]
+        else:
+            assert len(self._comment) == 3
+            assert self._comment[1] is None
+        if self.comment[1] is None:
+            self._comment[1] = []  # type: ignore
+        self._comment[1].extend([None] * (comment_type + 1 - len(self.comment[1])))  # type: ignore # NOQA
+        # nprintf('commy', self.comment, comment_type)
+        self._comment[1][comment_type] = comment  # type: ignore
+
+    def add_comment_post(self, comment):
+        # type: (Any) -> None
+        if not hasattr(self, '_comment'):
+            self._comment = [None, None, []]  # type: ignore
+        else:
+            assert len(self._comment) == 3
+            if self._comment[2] is None:
+                self._comment[2] = []  # type: ignore
+        self._comment[2].append(comment)  # type: ignore
+
+    # def get_comment(self):
+    #     # type: () -> Any
+    #     return getattr(self, '_comment', None)
+
+    @property
+    def comment(self):
+        # type: () -> Any
+        return getattr(self, '_comment', None)
+
+    def move_old_comment(self, target, empty=False):
+        # type: (Any, bool) -> Any
+        """move a comment from this token to target (normally next token)
+        used to combine e.g. comments before a BlockEntryToken to the
+        ScalarToken that follows it
+        empty is a special for empty values -> comment after key
+        """
+        c = self.comment
+        if c is None:
+            return
+        # don't push beyond last element
+        if isinstance(target, (StreamEndToken, DocumentStartToken)):
+            return
+        delattr(self, '_comment')
+        tc = target.comment
+        if not tc:  # target comment, just insert
+            # special for empty value in key: value issue 25
+            if empty:
+                c = [c[0], c[1], None, None, c[0]]
+            target._comment = c
+            # nprint('mco2:', self, target, target.comment, empty)
+            return self
+        if c[0] and tc[0] or c[1] and tc[1]:
+            raise NotImplementedError(_F('overlap in comment {c!r} {tc!r}', c=c, tc=tc))
+        if c[0]:
+            tc[0] = c[0]
+        if c[1]:
+            tc[1] = c[1]
+        return self
+
+    def split_old_comment(self):
+        # type: () -> Any
+        """ split the post part of a comment, and return it
+        as comment to be added. Delete second part if [None, None]
+         abc:  # this goes to sequence
+           # this goes to first element
+           - first element
+        """
+        comment = self.comment
+        if comment is None or comment[0] is None:
+            return None  # nothing to do
+        ret_val = [comment[0], None]
+        if comment[1] is None:
+            delattr(self, '_comment')
+        return ret_val
+
+    def move_new_comment(self, target, empty=False):
+        # type: (Any, bool) -> Any
+        """move a comment from this token to target (normally next token)
+        used to combine e.g. comments before a BlockEntryToken to the
+        ScalarToken that follows it
+        empty is a special for empty values -> comment after key
+        """
+        c = self.comment
+        if c is None:
+            return
+        # don't push beyond last element
+        if isinstance(target, (StreamEndToken, DocumentStartToken)):
+            return
+        delattr(self, '_comment')
+        tc = target.comment
+        if not tc:  # target comment, just insert
+            # special for empty value in key: value issue 25
+            if empty:
+                c = [c[0], c[1], c[2]]
+            target._comment = c
+            # nprint('mco2:', self, target, target.comment, empty)
+            return self
+        # if self and target have both pre, eol or post comments, something seems wrong
+        for idx in range(3):
+            if c[idx] is not None and tc[idx] is not None:
+                raise NotImplementedError(_F('overlap in comment {c!r} {tc!r}', c=c, tc=tc))
+        # move the comment parts
+        for idx in range(3):
+            if c[idx]:
+                tc[idx] = c[idx]
+        return self
+
+
+# class BOMToken(Token):
+#     id = '<byte order mark>'
+
+
+class DirectiveToken(Token):
+    __slots__ = 'name', 'value'
+    id = '<directive>'
+
+    def __init__(self, name, value, start_mark, end_mark):
+        # type: (Any, Any, Any, Any) -> None
+        Token.__init__(self, start_mark, end_mark)
+        self.name = name
+        self.value = value
+
+
+class DocumentStartToken(Token):
+    __slots__ = ()
+    id = '<document start>'
+
+
+class DocumentEndToken(Token):
+    __slots__ = ()
+    id = '<document end>'
+
+
+class StreamStartToken(Token):
+    __slots__ = ('encoding',)
+    id = '<stream start>'
+
+    def __init__(self, start_mark=None, end_mark=None, encoding=None):
+        # type: (Any, Any, Any) -> None
+        Token.__init__(self, start_mark, end_mark)
+        self.encoding = encoding
+
+
+class StreamEndToken(Token):
+    __slots__ = ()
+    id = '<stream end>'
+
+
+class BlockSequenceStartToken(Token):
+    __slots__ = ()
+    id = '<block sequence start>'
+
+
+class BlockMappingStartToken(Token):
+    __slots__ = ()
+    id = '<block mapping start>'
+
+
+class BlockEndToken(Token):
+    __slots__ = ()
+    id = '<block end>'
+
+
+class FlowSequenceStartToken(Token):
+    __slots__ = ()
+    id = '['
+
+
+class FlowMappingStartToken(Token):
+    __slots__ = ()
+    id = '{'
+
+
+class FlowSequenceEndToken(Token):
+    __slots__ = ()
+    id = ']'
+
+
+class FlowMappingEndToken(Token):
+    __slots__ = ()
+    id = '}'
+
+
+class KeyToken(Token):
+    __slots__ = ()
+    id = '?'
+
+    # def x__repr__(self):
+    #     return 'KeyToken({})'.format(
+    #         self.start_mark.buffer[self.start_mark.index:].split(None, 1)[0])
+
+
+class ValueToken(Token):
+    __slots__ = ()
+    id = ':'
+
+
+class BlockEntryToken(Token):
+    __slots__ = ()
+    id = '-'
+
+
+class FlowEntryToken(Token):
+    __slots__ = ()
+    id = ','
+
+
+class AliasToken(Token):
+    __slots__ = ('value',)
+    id = '<alias>'
+
+    def __init__(self, value, start_mark, end_mark):
+        # type: (Any, Any, Any) -> None
+        Token.__init__(self, start_mark, end_mark)
+        self.value = value
+
+
+class AnchorToken(Token):
+    __slots__ = ('value',)
+    id = '<anchor>'
+
+    def __init__(self, value, start_mark, end_mark):
+        # type: (Any, Any, Any) -> None
+        Token.__init__(self, start_mark, end_mark)
+        self.value = value
+
+
+class TagToken(Token):
+    __slots__ = ('value',)
+    id = '<tag>'
+
+    def __init__(self, value, start_mark, end_mark):
+        # type: (Any, Any, Any) -> None
+        Token.__init__(self, start_mark, end_mark)
+        self.value = value
+
+
+class ScalarToken(Token):
+    __slots__ = 'value', 'plain', 'style'
+    id = '<scalar>'
+
+    def __init__(self, value, plain, start_mark, end_mark, style=None):
+        # type: (Any, Any, Any, Any, Any) -> None
+        Token.__init__(self, start_mark, end_mark)
+        self.value = value
+        self.plain = plain
+        self.style = style
+
+
+class CommentToken(Token):
+    __slots__ = '_value', 'pre_done'
+    id = '<comment>'
+
+    def __init__(self, value, start_mark=None, end_mark=None, column=None):
+        # type: (Any, Any, Any, Any) -> None
+        if start_mark is None:
+            assert column is not None
+            self._column = column
+        Token.__init__(self, start_mark, None)  # type: ignore
+        self._value = value
+
+    @property
+    def value(self):
+        # type: () -> str
+        if isinstance(self._value, str):
+            return self._value
+        return "".join(self._value)
+
+    @value.setter
+    def value(self, val):
+        # type: (Any) -> None
+        self._value = val
+
+    def reset(self):
+        # type: () -> None
+        if hasattr(self, 'pre_done'):
+            delattr(self, 'pre_done')
+
+    def __repr__(self):
+        # type: () -> Any
+        v = '{!r}'.format(self.value)
+        if SHOW_LINES:
+            try:
+                v += ', line: ' + str(self.start_mark.line)
+            except:  # NOQA
+                pass
+            try:
+                v += ', col: ' + str(self.start_mark.column)
+            except:  # NOQA
+                pass
+        return 'CommentToken({})'.format(v)
+
+    def __eq__(self, other):
+        # type: (Any) -> bool
+        if self.start_mark != other.start_mark:
+            return False
+        if self.end_mark != other.end_mark:
+            return False
+        if self.value != other.value:
+            return False
+        return True
+
+    def __ne__(self, other):
+        # type: (Any) -> bool
+        return not self.__eq__(other)

lib/spack/external/_vendoring/ruamel/yaml/util.py

@@ -0,0 +1,256 @@
+# coding: utf-8
+
+"""
+some helper functions that might be generally useful
+"""
+
+import datetime
+from functools import partial
+import re
+
+
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List, Text  # NOQA
+    from .compat import StreamTextType  # NOQA
+
+
+class LazyEval:
+    """
+    Lightweight wrapper around lazily evaluated func(*args, **kwargs).
+
+    func is only evaluated when any attribute of its return value is accessed.
+    Every attribute access is passed through to the wrapped value.
+    (This only excludes special cases like method-wrappers, e.g., __hash__.)
+    The sole additional attribute is the lazy_self function which holds the
+    return value (or, prior to evaluation, func and arguments), in its closure.
+    """
+
+    def __init__(self, func, *args, **kwargs):
+        # type: (Any, Any, Any) -> None
+        def lazy_self():
+            # type: () -> Any
+            return_value = func(*args, **kwargs)
+            object.__setattr__(self, 'lazy_self', lambda: return_value)
+            return return_value
+
+        object.__setattr__(self, 'lazy_self', lazy_self)
+
+    def __getattribute__(self, name):
+        # type: (Any) -> Any
+        lazy_self = object.__getattribute__(self, 'lazy_self')
+        if name == 'lazy_self':
+            return lazy_self
+        return getattr(lazy_self(), name)
+
+    def __setattr__(self, name, value):
+        # type: (Any, Any) -> None
+        setattr(self.lazy_self(), name, value)
+
+
+RegExp = partial(LazyEval, re.compile)
+
+timestamp_regexp = RegExp(
+    """^(?P<year>[0-9][0-9][0-9][0-9])
+       -(?P<month>[0-9][0-9]?)
+       -(?P<day>[0-9][0-9]?)
+       (?:((?P<t>[Tt])|[ \\t]+)   # explictly not retaining extra spaces
+       (?P<hour>[0-9][0-9]?)
+       :(?P<minute>[0-9][0-9])
+       :(?P<second>[0-9][0-9])
+       (?:\\.(?P<fraction>[0-9]*))?
+        (?:[ \\t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
+       (?::(?P<tz_minute>[0-9][0-9]))?))?)?$""",
+    re.X,
+)
+
+
+def create_timestamp(
+    year, month, day, t, hour, minute, second, fraction, tz, tz_sign, tz_hour, tz_minute
+):
+    # type: (Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any) -> Any
+    # create a timestamp from match against timestamp_regexp
+    MAX_FRAC = 999999
+    year = int(year)
+    month = int(month)
+    day = int(day)
+    if not hour:
+        return datetime.date(year, month, day)
+    hour = int(hour)
+    minute = int(minute)
+    second = int(second)
+    frac = 0
+    if fraction:
+        frac_s = fraction[:6]
+        while len(frac_s) < 6:
+            frac_s += '0'
+        frac = int(frac_s)
+        if len(fraction) > 6 and int(fraction[6]) > 4:
+            frac += 1
+        if frac > MAX_FRAC:
+            fraction = 0
+        else:
+            fraction = frac
+    else:
+        fraction = 0
+    delta = None
+    if tz_sign:
+        tz_hour = int(tz_hour)
+        tz_minute = int(tz_minute) if tz_minute else 0
+        delta = datetime.timedelta(
+            hours=tz_hour, minutes=tz_minute, seconds=1 if frac > MAX_FRAC else 0
+        )
+        if tz_sign == '-':
+            delta = -delta
+    elif frac > MAX_FRAC:
+        delta = -datetime.timedelta(seconds=1)
+    # should do something else instead (or hook this up to the preceding if statement
+    # in reverse
+    #  if delta is None:
+    #      return datetime.datetime(year, month, day, hour, minute, second, fraction)
+    #  return datetime.datetime(year, month, day, hour, minute, second, fraction,
+    #                           datetime.timezone.utc)
+    # the above is not good enough though, should provide tzinfo. In Python3 that is easily
+    # doable drop that kind of support for Python2 as it has not native tzinfo
+    data = datetime.datetime(year, month, day, hour, minute, second, fraction)
+    if delta:
+        data -= delta
+    return data
+
+
+# originally as comment
+# https://github.com/pre-commit/pre-commit/pull/211#issuecomment-186466605
+# if you use this in your code, I suggest adding a test in your test suite
+# that check this routines output against a known piece of your YAML
+# before upgrades to this code break your round-tripped YAML
+def load_yaml_guess_indent(stream, **kw):
+    # type: (StreamTextType, Any) -> Any
+    """guess the indent and block sequence indent of yaml stream/string
+
+    returns round_trip_loaded stream, indent level, block sequence indent
+    - block sequence indent is the number of spaces before a dash relative to previous indent
+    - if there are no block sequences, indent is taken from nested mappings, block sequence
+      indent is unset (None) in that case
+    """
+    from .main import YAML
+
+    # load a YAML document, guess the indentation, if you use TABs you are on your own
+    def leading_spaces(line):
+        # type: (Any) -> int
+        idx = 0
+        while idx < len(line) and line[idx] == ' ':
+            idx += 1
+        return idx
+
+    if isinstance(stream, str):
+        yaml_str = stream  # type: Any
+    elif isinstance(stream, bytes):
+        # most likely, but the Reader checks BOM for this
+        yaml_str = stream.decode('utf-8')
+    else:
+        yaml_str = stream.read()
+    map_indent = None
+    indent = None  # default if not found for some reason
+    block_seq_indent = None
+    prev_line_key_only = None
+    key_indent = 0
+    for line in yaml_str.splitlines():
+        rline = line.rstrip()
+        lline = rline.lstrip()
+        if lline.startswith('- '):
+            l_s = leading_spaces(line)
+            block_seq_indent = l_s - key_indent
+            idx = l_s + 1
+            while line[idx] == ' ':  # this will end as we rstripped
+                idx += 1
+            if line[idx] == '#':  # comment after -
+                continue
+            indent = idx - key_indent
+            break
+        if map_indent is None and prev_line_key_only is not None and rline:
+            idx = 0
+            while line[idx] in ' -':
+                idx += 1
+            if idx > prev_line_key_only:
+                map_indent = idx - prev_line_key_only
+        if rline.endswith(':'):
+            key_indent = leading_spaces(line)
+            idx = 0
+            while line[idx] == ' ':  # this will end on ':'
+                idx += 1
+            prev_line_key_only = idx
+            continue
+        prev_line_key_only = None
+    if indent is None and map_indent is not None:
+        indent = map_indent
+    yaml = YAML()
+    return yaml.load(yaml_str, **kw), indent, block_seq_indent  # type: ignore
+
+
+def configobj_walker(cfg):
+    # type: (Any) -> Any
+    """
+    walks over a ConfigObj (INI file with comments) generating
+    corresponding YAML output (including comments
+    """
+    from configobj import ConfigObj  # type: ignore
+
+    assert isinstance(cfg, ConfigObj)
+    for c in cfg.initial_comment:
+        if c.strip():
+            yield c
+    for s in _walk_section(cfg):
+        if s.strip():
+            yield s
+    for c in cfg.final_comment:
+        if c.strip():
+            yield c
+
+
+def _walk_section(s, level=0):
+    # type: (Any, int) -> Any
+    from configobj import Section
+
+    assert isinstance(s, Section)
+    indent = '  ' * level
+    for name in s.scalars:
+        for c in s.comments[name]:
+            yield indent + c.strip()
+        x = s[name]
+        if '\n' in x:
+            i = indent + '  '
+            x = '|\n' + i + x.strip().replace('\n', '\n' + i)
+        elif ':' in x:
+            x = "'" + x.replace("'", "''") + "'"
+        line = '{0}{1}: {2}'.format(indent, name, x)
+        c = s.inline_comments[name]
+        if c:
+            line += ' ' + c
+        yield line
+    for name in s.sections:
+        for c in s.comments[name]:
+            yield indent + c.strip()
+        line = '{0}{1}:'.format(indent, name)
+        c = s.inline_comments[name]
+        if c:
+            line += ' ' + c
+        yield line
+        for val in _walk_section(s[name], level=level + 1):
+            yield val
+
+
+# def config_obj_2_rt_yaml(cfg):
+#     from .comments import CommentedMap, CommentedSeq
+#     from configobj import ConfigObj
+#     assert isinstance(cfg, ConfigObj)
+#     #for c in cfg.initial_comment:
+#     #    if c.strip():
+#     #        pass
+#     cm = CommentedMap()
+#     for name in s.sections:
+#         cm[name] = d = CommentedMap()
+#
+#
+#     #for c in cfg.final_comment:
+#     #    if c.strip():
+#     #        yield c
+#     return cm

lib/spack/external/archspec/__main__.py

@@ -0,0 +1,8 @@
+"""
+Run the `archspec` CLI as a module.
+"""
+
+import sys
+from .cli import main
+
+sys.exit(main())

lib/spack/external/archspec/cli.py

@@ -6,19 +6,61 @@
 archspec command line interface
 """
 
-import click
+import argparse
+import typing
 
 import archspec
 import archspec.cpu
 
 
-@click.group(name="archspec")
-@click.version_option(version=archspec.__version__)
-def main():
-    """archspec command line interface"""
+def _make_parser() -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser(
+        "archspec",
+        description="archspec command line interface",
+        add_help=False,
+    )
+    parser.add_argument(
+        "--version",
+        "-V",
+        help="Show the version and exit.",
+        action="version",
+        version=f"archspec, version {archspec.__version__}",
+    )
+    parser.add_argument("--help", "-h", help="Show the help and exit.", action="help")
+
+    subcommands = parser.add_subparsers(
+        title="command",
+        metavar="COMMAND",
+        dest="command",
+    )
+
+    cpu_command = subcommands.add_parser(
+        "cpu",
+        help="archspec command line interface for CPU",
+        description="archspec command line interface for CPU",
+    )
+    cpu_command.set_defaults(run=cpu)
+
+    return parser
 
 
-@main.command()
-def cpu():
-    """archspec command line interface for CPU"""
-    click.echo(archspec.cpu.host())
+def cpu() -> int:
+    """Run the `archspec cpu` subcommand."""
+    print(archspec.cpu.host())
+    return 0
+
+
+def main(argv: typing.Optional[typing.List[str]] = None) -> int:
+    """Run the `archspec` command line interface."""
+    parser = _make_parser()
+
+    try:
+        args = parser.parse_args(argv)
+    except SystemExit as err:
+        return err.code
+
+    if args.command is None:
+        parser.print_help()
+        return 0
+
+    return args.run()

lib/spack/external/archspec/cpu/microarchitecture.py

@@ -268,15 +268,14 @@ def tuplify(ver):
                 return flags
 
         msg = (
-            "cannot produce optimized binary for micro-architecture '{0}'"
-            " with {1}@{2} [supported compiler versions are {3}]"
-        )
-        msg = msg.format(
-            self.name,
-            compiler,
-            version,
-            ", ".join([x["versions"] for x in compiler_info]),
+            "cannot produce optimized binary for micro-architecture '{0}' with {1}@{2}"
         )
+        if compiler_info:
+            versions = [x["versions"] for x in compiler_info]
+            msg += f' [supported compiler versions are {", ".join(versions)}]'
+        else:
+            msg += " [no supported compiler versions]"
+        msg = msg.format(self.name, compiler, version)
         raise UnsupportedMicroarchitecture(msg)
 
 

lib/spack/external/archspec/json/cpu/microarchitectures.json

@@ -102,7 +102,8 @@
             "name": "x86-64",
             "flags": "-march={name} -mtune=generic"
           }
-        ]
+        ],
+	"nvhpc": []
       }
     },
     "x86_64_v2": {
@@ -157,7 +158,8 @@
             "name": "x86-64-v2",
             "flags": "-march={name} -mtune=generic"
           }
-        ]
+        ],
+	"nvhpc": []
       }
     },
     "x86_64_v3": {
@@ -228,6 +230,13 @@
             "name": "x86-64-v3",
             "flags": "-march={name} -mtune=generic"
           }
+        ],
+        "nvhpc" : [
+          {
+            "versions": ":",
+            "name": "px",
+            "flags": "-tp {name} -mpopcnt -msse3 -msse4.1 -msse4.2 -mssse3 -mavx -mavx2 -mbmi -mbmi2 -mf16c -mfma -mlzcnt -mxsave"
+          }
         ]
       }
     },
@@ -304,6 +313,13 @@
             "name": "x86-64-v4",
             "flags": "-march={name} -mtune=generic"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "name": "px",
+            "flags": "-tp {name} -mpopcnt -msse3 -msse4.1 -msse4.2 -mssse3 -mavx -mavx2 -mbmi -mbmi2 -mf16c -mfma -mlzcnt -mxsave -mavx512f -mavx512bw -mavx512cd -mavx512dq -mavx512vl"
+          }
         ]
       }
     },
@@ -358,7 +374,8 @@
             "versions": ":",
             "flags": "-march={name} -mtune={name}"
           }
-        ]
+        ],
+	"nvhpc": []
       }
     },
     "core2": {
@@ -412,7 +429,8 @@
             "versions": ":",
             "flags": "-march={name} -mtune={name}"
           }
-        ]
+        ],
+	"nvhpc": []
       }
     },
     "nehalem": {
@@ -477,7 +495,8 @@
             "name": "corei7",
             "flags": "-march={name} -mtune={name}"
           }
-        ]
+        ],
+	"nvhpc": []
       }
     },
     "westmere": {
@@ -539,7 +558,8 @@
             "name": "corei7",
             "flags": "-march={name} -mtune={name}"
           }
-        ]
+        ],
+	"nvhpc": []
       }
     },
     "sandybridge": {
@@ -609,6 +629,12 @@
             "versions": ":",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -681,6 +707,12 @@
             "versions": ":",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -758,6 +790,12 @@
             "versions": ":",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -827,6 +865,13 @@
             "versions": ":",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "name": "haswell",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -899,6 +944,13 @@
             "versions": ":",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "name": "haswell",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1063,6 +1115,13 @@
             "name": "skylake-avx512",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "name": "skylake",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1143,6 +1202,13 @@
             "versions": ":",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "name": "skylake",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1222,6 +1288,13 @@
             "versions": ":",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "name": "skylake",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1329,6 +1402,13 @@
             "name": "icelake-client",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "name": "skylake",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1387,7 +1467,8 @@
             "warnings": "Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors",
             "flags": "-msse2"
           }
-        ]
+        ],
+	"nvhpc": []
       }
     },
     "bulldozer": {
@@ -1451,6 +1532,12 @@
             "warnings": "Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors",
             "flags": "-msse3"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1519,6 +1606,12 @@
             "warnings": "Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors",
             "flags": "-msse3"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1588,6 +1681,13 @@
             "warnings": "Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors",
             "flags": "-msse4.2"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "name": "piledriver",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1663,6 +1763,13 @@
             "name": "core-avx2",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "name": "piledriver",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1741,6 +1848,12 @@
             "name": "core-avx2",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": ":",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1820,6 +1933,12 @@
             "name": "core-avx2",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": "20.5:",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1902,6 +2021,12 @@
             "name": "core-avx2",
             "flags": "-march={name} -mtune={name}"
           }
+        ],
+        "nvhpc": [
+          {
+            "versions": "21.11:",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -1958,18 +2083,28 @@
       "compilers": {
         "gcc": [
           {
-            "versions": "10.3:",
+            "versions": "10.3:13.0",
             "name": "znver3",
             "flags": "-march={name} -mtune={name} -mavx512f -mavx512dq -mavx512ifma -mavx512cd -mavx512bw -mavx512vl -mavx512vbmi -mavx512vbmi2 -mavx512vnni -mavx512bitalg"
+          },
+          {
+            "versions": "13.1:",
+            "name": "znver4",
+            "flags": "-march={name} -mtune={name}"
           }
         ],
         "clang": [
           {
-            "versions": "12.0:",
+            "versions": "12.0:15.9",
             "name": "znver3",
             "flags": "-march={name} -mtune={name} -mavx512f -mavx512dq -mavx512ifma -mavx512cd -mavx512bw -mavx512vl -mavx512vbmi -mavx512vbmi2 -mavx512vnni -mavx512bitalg"
+          },
+          {
+            "versions": "16.0:",
+            "name": "znver4",
+            "flags": "-march={name} -mtune={name}"
           }
-        ],
+	],
         "aocc": [
           {
             "versions": "3.0:3.9",
@@ -1982,7 +2117,15 @@
             "name": "znver4",
             "flags": "-march={name} -mtune={name}"
           }
-        ]
+        ],
+        "nvhpc": [
+          {
+            "versions": "21.11:",
+	    "name": "zen3",
+            "flags": "-tp {name}",
+	    "warnings": "zen4 is not fully supported by nvhpc yet, falling back to zen3"
+          }
+	]
       }
     },
     "ppc64": {
@@ -2087,7 +2230,8 @@
             "versions": ":",
             "flags": "-mcpu={name} -mtune={name}"
           }
-        ]
+        ],
+	"nvhpc": []
       }
     },
     "power8le": {
@@ -2116,6 +2260,13 @@
             "name": "power8",
             "flags": "-mcpu={name} -mtune={name}"
           }
+        ],
+	"nvhpc": [
+          {
+            "versions": ":",
+            "name": "pwr8",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -2139,6 +2290,13 @@
             "name": "power9",
             "flags": "-mcpu={name} -mtune={name}"
           }
+        ],
+	"nvhpc": [
+          {
+            "versions": ":",
+            "name": "pwr9",
+            "flags": "-tp {name}"
+          }
         ]
       }
     },
@@ -2170,7 +2328,8 @@
             "versions": ":",
             "flags": "-march=armv8-a -mtune=generic"
           }
-        ]
+        ],
+	"nvhpc": []
       }
     },
     "armv8.1a": {
@@ -2552,6 +2711,13 @@
                   "versions": "20:",
                   "flags" : "-march=armv8.2-a+fp16+rcpc+dotprod+crypto"
               }
+          ],
+          "nvhpc" : [
+              {
+                  "versions": "22.5:",
+                  "name": "neoverse-n1",
+                  "flags": "-tp {name}"
+              }
           ]
       }
     },
@@ -2617,15 +2783,31 @@
                   "flags" : "-march=armv8.2-a+crypto+fp16 -mtune=cortex-a72"
               },
               {
-                  "versions": "8.0:8.9",
+                  "versions": "8.0:8.4",
                   "flags" : "-march=armv8.2-a+fp16+dotprod+crypto -mtune=cortex-a72"
               },
               {
-                  "versions": "9.0:9.9",
+                  "versions": "8.5:8.9",
                   "flags" : "-mcpu=neoverse-v1"
               },
-	            {
-                  "versions": "10.0:",
+              {
+                  "versions": "9.0:9.3",
+                  "flags" : "-march=armv8.2-a+fp16+dotprod+crypto -mtune=cortex-a72"
+              },
+              {
+                  "versions": "9.4:9.9",
+                  "flags" : "-mcpu=neoverse-v1"
+              },
+              {
+                  "versions": "10.0:10.1",
+                  "flags" : "-march=armv8.2-a+fp16+dotprod+crypto -mtune=cortex-a72"
+              },
+              {
+                  "versions": "10.2:10.2.99",
+                  "flags" : "-mcpu=zeus"
+              },
+              {
+                  "versions": "10.3:",
                   "flags" : "-mcpu=neoverse-v1"
               }
 
@@ -2657,6 +2839,13 @@
                   "versions": "22:",
                   "flags" : "-march=armv8.4-a+sve+ssbs+fp16+bf16+crypto+i8mm+rng"
               }
+          ],
+          "nvhpc" : [
+              {
+                  "versions": "22.5:",
+                  "name": "neoverse-n1",
+                  "flags": "-tp {name}"
+              }
           ]
       }
     },
@@ -2782,6 +2971,10 @@
           {
             "versions": "13.0:",
             "flags" : "-mcpu=apple-m1"
+          },
+          {
+            "versions": "16.0:",
+            "flags" : "-mcpu=apple-m2"
           }
         ],
         "apple-clang": [
@@ -2790,8 +2983,12 @@
             "flags" : "-march=armv8.5-a"
           },
           {
-            "versions": "13.0:",
-            "flags" : "-mcpu=vortex"
+            "versions": "13.0:14.0.2",
+            "flags" : "-mcpu=apple-m1"
+          },
+          {
+            "versions": "14.0.2:",
+            "flags" : "-mcpu=apple-m2"
           }
         ]
       }

lib/spack/external/ctest_log_parser.py

@@ -65,9 +65,6 @@
 up to date with CTest, just make sure the ``*_matches`` and
 ``*_exceptions`` lists are kept up to date with CTest's build handler.
 """
-from __future__ import print_function
-from __future__ import division
-
 import re
 import math
 import multiprocessing
@@ -211,7 +208,7 @@
 ]
 
 
-class LogEvent(object):
+class LogEvent:
     """Class representing interesting events (e.g., errors) in a build log."""
     def __init__(self, text, line_no,
                  source_file=None, source_line_no=None,
@@ -348,7 +345,7 @@ def _parse_unpack(args):
     return _parse(*args)
 
 
-class CTestLogParser(object):
+class CTestLogParser:
     """Log file parser that extracts errors and warnings."""
     def __init__(self, profile=False):
         # whether to record timing information

lib/spack/external/ruamel/yaml/.ruamel/__init__.py

@@ -1,2 +0,0 @@
-import pkg_resources
-pkg_resources.declare_namespace(__name__)

lib/spack/external/ruamel/yaml/README.rst

@@ -1,38 +0,0 @@
-
-ruamel.yaml
-===========
-
-``ruamel.yaml`` is a YAML 1.2 loader/dumper package for Python.
-
-* `Overview <http://yaml.readthedocs.org/en/latest/overview.html>`_
-* `Installing <http://yaml.readthedocs.org/en/latest/install.html>`_
-* `Details <http://yaml.readthedocs.org/en/latest/detail.html>`_
-* `Examples <http://yaml.readthedocs.org/en/latest/example.html>`_
-* `Differences with PyYAML <http://yaml.readthedocs.org/en/latest/pyyaml.html>`_
-
-.. image:: https://readthedocs.org/projects/yaml/badge/?version=stable
-   :target: https://yaml.readthedocs.org/en/stable
-
-ChangeLog
-=========
-
-::
-
-  0.11.15 (2016-XX-XX):
-    - Change to prevent FutureWarning in NumPy, as reported by tgehring
-    ("comparison to None will result in an elementwise object comparison in the future")
-
-  0.11.14 (2016-07-06):
-    - fix preserve_quotes missing on original Loaders (as reported
-      by Leynos, bitbucket issue 38)
-
-  0.11.13 (2016-07-06):
-    - documentation only, automated linux wheels
-
-  0.11.12 (2016-07-06):
-    - added support for roundtrip of single/double quoted scalars using:
-      ruamel.yaml.round_trip_load(stream, preserve_quotes=True)
-
-  0.11.0 (2016-02-18):
-    - RoundTripLoader loads 1.2 by default (no sexagesimals, 012 octals nor
-      yes/no/on/off booleans

lib/spack/external/ruamel/yaml/__init__.py

@@ -1,85 +0,0 @@
-# coding: utf-8
-
-from __future__ import print_function
-from __future__ import absolute_import
-
-# install_requires of ruamel.base is not really required but the old
-# ruamel.base installed __init__.py, and thus a new version should
-# be installed at some point
-
-_package_data = dict(
-    full_package_name="ruamel.yaml",
-    version_info=(0, 11, 15),
-    author="Anthon van der Neut",
-    author_email="a.van.der.neut@ruamel.eu",
-    description="ruamel.yaml is a YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order",  # NOQA
-    entry_points=None,
-    install_requires=dict(
-        any=[],
-        py26=["ruamel.ordereddict"],
-        py27=["ruamel.ordereddict"]
-    ),
-    ext_modules=[dict(
-        name="_ruamel_yaml",
-        src=["ext/_ruamel_yaml.c", "ext/api.c", "ext/writer.c", "ext/dumper.c",
-                "ext/loader.c", "ext/reader.c", "ext/scanner.c", "ext/parser.c",
-                "ext/emitter.c"],
-        lib=[],
-        # test='#include "ext/yaml.h"\n\nint main(int argc, char* argv[])\n{\nyaml_parser_t parser;\nparser = parser;  /* prevent warning */\nreturn 0;\n}\n'  # NOQA
-        )
-    ],
-    classifiers=[
-        "Programming Language :: Python :: 2.6",
-        "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3.3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: Implementation :: CPython",
-        "Programming Language :: Python :: Implementation :: PyPy",
-        "Programming Language :: Python :: Implementation :: Jython",
-        "Topic :: Software Development :: Libraries :: Python Modules",
-        "Topic :: Text Processing :: Markup"
-    ],
-    windows_wheels=True,
-    read_the_docs='yaml',
-    many_linux='libyaml-devel',
-)
-
-
-# < from ruamel.util.new import _convert_version
-def _convert_version(tup):
-    """create a PEP 386 pseudo-format conformant string from tuple tup"""
-    ret_val = str(tup[0])  # first is always digit
-    next_sep = "."  # separator for next extension, can be "" or "."
-    for x in tup[1:]:
-        if isinstance(x, int):
-            ret_val += next_sep + str(x)
-            next_sep = '.'
-            continue
-        first_letter = x[0].lower()
-        next_sep = ''
-        if first_letter in 'abcr':
-            ret_val += 'rc' if first_letter == 'r' else first_letter
-        elif first_letter in 'pd':
-            ret_val += '.post' if first_letter == 'p' else '.dev'
-    return ret_val
-
-
-# <
-version_info = _package_data['version_info']
-__version__ = _convert_version(version_info)
-
-del _convert_version
-
-try:
-    from .cyaml import *                               # NOQA
-    __with_libyaml__ = True
-except (ImportError, ValueError):  # for Jython
-    __with_libyaml__ = False
-
-
-# body extracted to main.py
-try:
-    from .main import *                               # NOQA
-except ImportError:
-    from ruamel.yaml.main import *                               # NOQA

lib/spack/external/ruamel/yaml/comments.py

@@ -1,486 +0,0 @@
-# coding: utf-8
-
-from __future__ import absolute_import
-from __future__ import print_function
-
-"""
-stuff to deal with comments and formatting on dict/list/ordereddict/set
-these are not really related, formatting could be factored out as
-a separate base
-"""
-
-import sys
-
-if sys.version_info >= (3, 3):
-    from collections.abc import MutableSet
-else:
-    from collections import MutableSet
-
-__all__ = ["CommentedSeq", "CommentedMap", "CommentedOrderedMap",
-           "CommentedSet", 'comment_attrib', 'merge_attrib']
-
-
-try:
-    from .compat import ordereddict
-except ImportError:
-    from ruamel.yaml.compat import ordereddict
-
-comment_attrib = '_yaml_comment'
-format_attrib = '_yaml_format'
-line_col_attrib = '_yaml_line_col'
-anchor_attrib = '_yaml_anchor'
-merge_attrib = '_yaml_merge'
-tag_attrib = '_yaml_tag'
-
-
-class Comment(object):
-    # sys.getsize tested the Comment objects, __slots__ make them bigger
-    # and adding self.end did not matter
-    attrib = comment_attrib
-
-    def __init__(self):
-        self.comment = None  # [post, [pre]]
-        # map key (mapping/omap/dict) or index (sequence/list) to a  list of
-        # dict: post_key, pre_key, post_value, pre_value
-        # list: pre item, post item
-        self._items = {}
-        # self._start = [] # should not put these on first item
-        self._end = []  # end of document comments
-
-    def __str__(self):
-        if self._end:
-            end = ',\n  end=' + str(self._end)
-        else:
-            end = ''
-        return "Comment(comment={0},\n  items={1}{2})".format(
-            self.comment, self._items, end)
-
-    @property
-    def items(self):
-        return self._items
-
-    @property
-    def end(self):
-        return self._end
-
-    @end.setter
-    def end(self, value):
-        self._end = value
-
-    @property
-    def start(self):
-        return self._start
-
-    @start.setter
-    def start(self, value):
-        self._start = value
-
-
-# to distinguish key from None
-def NoComment():
-    pass
-
-
-class Format(object):
-    attrib = format_attrib
-
-    def __init__(self):
-        self._flow_style = None
-
-    def set_flow_style(self):
-        self._flow_style = True
-
-    def set_block_style(self):
-        self._flow_style = False
-
-    def flow_style(self, default=None):
-        """if default (the flow_style) is None, the flow style tacked on to
-        the object explicitly will be taken. If that is None as well the
-        default flow style rules the format down the line, or the type
-        of the constituent values (simple -> flow, map/list -> block)"""
-        if self._flow_style is None:
-            return default
-        return self._flow_style
-
-
-class LineCol(object):
-    attrib = line_col_attrib
-
-    def __init__(self):
-        self.line = None
-        self.col = None
-        self.data = None
-
-    def add_kv_line_col(self, key, data):
-        if self.data is None:
-            self.data = {}
-        self.data[key] = data
-
-    def key(self, k):
-        return self._kv(k, 0, 1)
-
-    def value(self, k):
-        return self._kv(k, 2, 3)
-
-    def _kv(self, k, x0, x1):
-        if self.data is None:
-            return None
-        data = self.data[k]
-        return data[x0], data[x1]
-
-    def item(self, idx):
-        if self.data is None:
-            return None
-        return self.data[idx][0], self.data[idx][1]
-
-    def add_idx_line_col(self, key, data):
-        if self.data is None:
-            self.data = {}
-        self.data[key] = data
-
-
-class Anchor(object):
-    attrib = anchor_attrib
-
-    def __init__(self):
-        self.value = None
-        self.always_dump = False
-
-
-class Tag(object):
-    """store tag information for roundtripping"""
-    attrib = tag_attrib
-
-    def __init__(self):
-        self.value = None
-
-
-class CommentedBase(object):
-    @property
-    def ca(self):
-        if not hasattr(self, Comment.attrib):
-            setattr(self, Comment.attrib, Comment())
-        return getattr(self, Comment.attrib)
-
-    def yaml_end_comment_extend(self, comment, clear=False):
-        if clear:
-            self.ca.end = []
-        self.ca.end.extend(comment)
-
-    def yaml_key_comment_extend(self, key, comment, clear=False):
-        l = self.ca._items.setdefault(key, [None, None, None, None])
-        if clear or l[1] is None:
-            if comment[1] is not None:
-                assert isinstance(comment[1], list)
-            l[1] = comment[1]
-        else:
-            l[1].extend(comment[0])
-        l[0] = comment[0]
-
-    def yaml_value_comment_extend(self, key, comment, clear=False):
-        l = self.ca._items.setdefault(key, [None, None, None, None])
-        if clear or l[3] is None:
-            if comment[1] is not None:
-                assert isinstance(comment[1], list)
-            l[3] = comment[1]
-        else:
-            l[3].extend(comment[0])
-        l[2] = comment[0]
-
-    def yaml_set_start_comment(self, comment, indent=0):
-        """overwrites any preceding comment lines on an object
-        expects comment to be without `#` and possible have mutlple lines
-        """
-        from .error import Mark
-        from .tokens import CommentToken
-        pre_comments = self._yaml_get_pre_comment()
-        if comment[-1] == '\n':
-            comment = comment[:-1]  # strip final newline if there
-        start_mark = Mark(None, None, None, indent, None, None)
-        for com in comment.split('\n'):
-            pre_comments.append(CommentToken('# ' + com + '\n', start_mark, None))
-
-    @property
-    def fa(self):
-        """format attribute
-
-        set_flow_style()/set_block_style()"""
-        if not hasattr(self, Format.attrib):
-            setattr(self, Format.attrib, Format())
-        return getattr(self, Format.attrib)
-
-    def yaml_add_eol_comment(self, comment, key=NoComment, column=None):
-        """
-        there is a problem as eol comments should start with ' #'
-        (but at the beginning of the line the space doesn't have to be before
-        the #. The column index is for the # mark
-        """
-        from .tokens import CommentToken
-        from .error import Mark
-        if column is None:
-            column = self._yaml_get_column(key)
-        if comment[0] != '#':
-            comment = '# ' + comment
-        if column is None:
-            if comment[0] == '#':
-                comment = ' ' + comment
-                column = 0
-        start_mark = Mark(None, None, None, column, None, None)
-        ct = [CommentToken(comment, start_mark, None), None]
-        self._yaml_add_eol_comment(ct, key=key)
-
-    @property
-    def lc(self):
-        if not hasattr(self, LineCol.attrib):
-            setattr(self, LineCol.attrib, LineCol())
-        return getattr(self, LineCol.attrib)
-
-    def _yaml_set_line_col(self, line, col):
-        self.lc.line = line
-        self.lc.col = col
-
-    def _yaml_set_kv_line_col(self, key, data):
-        self.lc.add_kv_line_col(key, data)
-
-    def _yaml_set_idx_line_col(self, key, data):
-        self.lc.add_idx_line_col(key, data)
-
-    @property
-    def anchor(self):
-        if not hasattr(self, Anchor.attrib):
-            setattr(self, Anchor.attrib, Anchor())
-        return getattr(self, Anchor.attrib)
-
-    def yaml_anchor(self):
-        if not hasattr(self, Anchor.attrib):
-            return None
-        return self.anchor
-
-    def yaml_set_anchor(self, value, always_dump=False):
-        self.anchor.value = value
-        self.anchor.always_dump = always_dump
-
-    @property
-    def tag(self):
-        if not hasattr(self, Tag.attrib):
-            setattr(self, Tag.attrib, Tag())
-        return getattr(self, Tag.attrib)
-
-    def yaml_set_tag(self, value):
-        self.tag.value = value
-
-
-class CommentedSeq(list, CommentedBase):
-    __slots__ = [Comment.attrib, ]
-
-    def _yaml_add_comment(self, comment, key=NoComment):
-        if key is not NoComment:
-            self.yaml_key_comment_extend(key, comment)
-        else:
-            self.ca.comment = comment
-
-    def _yaml_add_eol_comment(self, comment, key):
-        self._yaml_add_comment(comment, key=key)
-
-    def _yaml_get_columnX(self, key):
-        return self.ca.items[key][0].start_mark.column
-
-    def insert(self, idx, val):
-        """the comments after the insertion have to move forward"""
-        list.insert(self, idx, val)
-        for list_index in sorted(self.ca.items, reverse=True):
-            if list_index < idx:
-                break
-            self.ca.items[list_index+1] = self.ca.items.pop(list_index)
-
-    def pop(self, idx):
-        res = list.pop(self, idx)
-        self.ca.items.pop(idx, None)  # might not be there -> default value
-        for list_index in sorted(self.ca.items):
-            if list_index < idx:
-                continue
-            self.ca.items[list_index-1] = self.ca.items.pop(list_index)
-        return res
-
-    def _yaml_get_column(self, key):
-        column = None
-        sel_idx = None
-        pre, post = key-1, key+1
-        if pre in self.ca.items:
-            sel_idx = pre
-        elif post in self.ca.items:
-            sel_idx = post
-        else:
-            # self.ca.items is not ordered
-            for row_idx, k1 in enumerate(self):
-                if row_idx >= key:
-                    break
-                if row_idx not in self.ca.items:
-                    continue
-                sel_idx = row_idx
-        if sel_idx is not None:
-            column = self._yaml_get_columnX(sel_idx)
-        return column
-
-    def _yaml_get_pre_comment(self):
-        if self.ca.comment is None:
-            pre_comments = []
-            self.ca.comment = [None, pre_comments]
-        else:
-            pre_comments = self.ca.comment[1] = []
-        return pre_comments
-
-
-class CommentedMap(ordereddict, CommentedBase):
-    __slots__ = [Comment.attrib, ]
-
-    def _yaml_add_comment(self, comment, key=NoComment, value=NoComment):
-        """values is set to key to indicate a value attachment of comment"""
-        if key is not NoComment:
-            self.yaml_key_comment_extend(key, comment)
-            return
-        if value is not NoComment:
-            self.yaml_value_comment_extend(value, comment)
-        else:
-            self.ca.comment = comment
-
-    def _yaml_add_eol_comment(self, comment, key):
-        """add on the value line, with value specified by the key"""
-        self._yaml_add_comment(comment, value=key)
-
-    def _yaml_get_columnX(self, key):
-        return self.ca.items[key][2].start_mark.column
-
-    def _yaml_get_column(self, key):
-        column = None
-        sel_idx = None
-        pre, post, last = None, None, None
-        for x in self:
-            if pre is not None and x != key:
-                post = x
-                break
-            if x == key:
-                pre = last
-            last = x
-        if pre in self.ca.items:
-            sel_idx = pre
-        elif post in self.ca.items:
-            sel_idx = post
-        else:
-            # self.ca.items is not ordered
-            for row_idx, k1 in enumerate(self):
-                if k1 >= key:
-                    break
-                if k1 not in self.ca.items:
-                    continue
-                sel_idx = k1
-        if sel_idx is not None:
-            column = self._yaml_get_columnX(sel_idx)
-        return column
-
-    def _yaml_get_pre_comment(self):
-        if self.ca.comment is None:
-            pre_comments = []
-            self.ca.comment = [None, pre_comments]
-        else:
-            pre_comments = self.ca.comment[1] = []
-        return pre_comments
-
-    def update(self, *vals, **kwds):
-        try:
-            ordereddict.update(self, *vals, **kwds)
-        except TypeError:
-            # probably a dict that is used
-            for x in vals:
-                self[x] = vals[x]
-
-    def insert(self, pos, key, value, comment=None):
-        """insert key value into given position
-        attach comment if provided
-        """
-        ordereddict.insert(self, pos, key, value)
-        if comment is not None:
-            self.yaml_add_eol_comment(comment, key=key)
-
-    def mlget(self, key, default=None, list_ok=False):
-        """multi-level get that expects dicts within dicts"""
-        if not isinstance(key, list):
-            return self.get(key, default)
-        # assume that the key is a list of recursively accessible dicts
-
-        def get_one_level(key_list, level, d):
-            if not list_ok:
-                assert isinstance(d, dict)
-            if level >= len(key_list):
-                if level > len(key_list):
-                    raise IndexError
-                return d[key_list[level-1]]
-            return get_one_level(key_list, level+1, d[key_list[level-1]])
-
-        try:
-            return get_one_level(key, 1, self)
-        except KeyError:
-            return default
-        except (TypeError, IndexError):
-            if not list_ok:
-                raise
-            return default
-
-    def __getitem__(self, key):
-        try:
-            return ordereddict.__getitem__(self, key)
-        except KeyError:
-            for merged in getattr(self, merge_attrib, []):
-                if key in merged[1]:
-                    return merged[1][key]
-            raise
-
-    def get(self, key, default=None):
-        try:
-            return self.__getitem__(key)
-        except:
-            return default
-
-    @property
-    def merge(self):
-        if not hasattr(self, merge_attrib):
-            setattr(self, merge_attrib, [])
-        return getattr(self, merge_attrib)
-
-    def add_yaml_merge(self, value):
-        self.merge.extend(value)
-
-
-class CommentedOrderedMap(CommentedMap):
-    __slots__ = [Comment.attrib, ]
-
-
-class CommentedSet(MutableSet, CommentedMap):
-    __slots__ = [Comment.attrib, 'odict']
-
-    def __init__(self, values=None):
-        self.odict = ordereddict()
-        MutableSet.__init__(self)
-        if values is not None:
-            self |= values
-
-    def add(self, value):
-        """Add an element."""
-        self.odict[value] = None
-
-    def discard(self, value):
-        """Remove an element.  Do not raise an exception if absent."""
-        del self.odict[value]
-
-    def __contains__(self, x):
-        return x in self.odict
-
-    def __iter__(self):
-        for x in self.odict:
-            yield x
-
-    def __len__(self):
-        return len(self.odict)
-
-    def __repr__(self):
-        return 'set({0!r})'.format(self.odict.keys())

lib/spack/external/ruamel/yaml/compat.py

@@ -1,123 +0,0 @@
-# coding: utf-8
-
-from __future__ import print_function
-
-# partially from package six by Benjamin Peterson
-
-import sys
-import os
-import types
-
-try:
-    from ruamel.ordereddict import ordereddict
-except:
-    try:
-        from collections.abc import OrderedDict
-    except ImportError:
-        try:
-            from collections import OrderedDict
-        except ImportError:
-            from ordereddict import OrderedDict
-    # to get the right name import ... as ordereddict doesn't do that
-
-    class ordereddict(OrderedDict):
-        if not hasattr(OrderedDict, 'insert'):
-            def insert(self, pos, key, value):
-                if pos >= len(self):
-                    self[key] = value
-                    return
-                od = ordereddict()
-                od.update(self)
-                for k in od:
-                    del self[k]
-                for index, old_key in enumerate(od):
-                    if pos == index:
-                        self[key] = value
-                    self[old_key] = od[old_key]
-
-
-PY2 = sys.version_info[0] == 2
-PY3 = sys.version_info[0] == 3
-
-if PY3:
-    def utf8(s):
-        return s
-
-    def to_str(s):
-        return s
-
-    def to_unicode(s):
-        return s
-
-else:
-    def utf8(s):
-        return s.encode('utf-8')
-
-    def to_str(s):
-        return str(s)
-
-    def to_unicode(s):
-        return unicode(s)
-
-if PY3:
-    string_types = str,
-    integer_types = int,
-    class_types = type,
-    text_type = str
-    binary_type = bytes
-
-    MAXSIZE = sys.maxsize
-    unichr = chr
-    import io
-    StringIO = io.StringIO
-    BytesIO = io.BytesIO
-
-else:
-    string_types = basestring,
-    integer_types = (int, long)
-    class_types = (type, types.ClassType)
-    text_type = unicode
-    binary_type = str
-
-    unichr = unichr  # to allow importing
-    import StringIO
-    StringIO = StringIO.StringIO
-    import cStringIO
-    BytesIO = cStringIO.StringIO
-
-if PY3:
-    builtins_module = 'builtins'
-else:
-    builtins_module = '__builtin__'
-
-
-def with_metaclass(meta, *bases):
-    """Create a base class with a metaclass."""
-    return meta("NewBase", bases, {})
-
-DBG_TOKEN = 1
-DBG_EVENT = 2
-DBG_NODE = 4
-
-
-_debug = None
-
-
-# used from yaml util when testing
-def dbg(val=None):
-    global _debug
-    if _debug is None:
-        # set to true or false
-        _debug = os.environ.get('YAMLDEBUG')
-        if _debug is None:
-            _debug = 0
-        else:
-            _debug = int(_debug)
-    if val is None:
-        return _debug
-    return _debug & val
-
-
-def nprint(*args, **kw):
-    if dbg:
-        print(*args, **kw)

lib/spack/external/ruamel/yaml/composer.py

@@ -1,182 +0,0 @@
-# coding: utf-8
-
-from __future__ import absolute_import
-from __future__ import print_function
-
-
-try:
-    from .error import MarkedYAMLError
-    from .compat import utf8
-except (ImportError, ValueError):  # for Jython
-    from ruamel.yaml.error import MarkedYAMLError
-    from ruamel.yaml.compat import utf8
-
-from ruamel.yaml.events import (
-    StreamStartEvent, StreamEndEvent, MappingStartEvent, MappingEndEvent,
-    SequenceStartEvent, SequenceEndEvent, AliasEvent, ScalarEvent,
-)
-from ruamel.yaml.nodes import (
-    MappingNode, ScalarNode, SequenceNode,
-)
-
-__all__ = ['Composer', 'ComposerError']
-
-
-class ComposerError(MarkedYAMLError):
-    pass
-
-
-class Composer(object):
-    def __init__(self):
-        self.anchors = {}
-
-    def check_node(self):
-        # Drop the STREAM-START event.
-        if self.check_event(StreamStartEvent):
-            self.get_event()
-
-        # If there are more documents available?
-        return not self.check_event(StreamEndEvent)
-
-    def get_node(self):
-        # Get the root node of the next document.
-        if not self.check_event(StreamEndEvent):
-            return self.compose_document()
-
-    def get_single_node(self):
-        # Drop the STREAM-START event.
-        self.get_event()
-
-        # Compose a document if the stream is not empty.
-        document = None
-        if not self.check_event(StreamEndEvent):
-            document = self.compose_document()
-
-        # Ensure that the stream contains no more documents.
-        if not self.check_event(StreamEndEvent):
-            event = self.get_event()
-            raise ComposerError(
-                "expected a single document in the stream",
-                document.start_mark, "but found another document",
-                event.start_mark)
-
-        # Drop the STREAM-END event.
-        self.get_event()
-
-        return document
-
-    def compose_document(self):
-        # Drop the DOCUMENT-START event.
-        self.get_event()
-
-        # Compose the root node.
-        node = self.compose_node(None, None)
-
-        # Drop the DOCUMENT-END event.
-        self.get_event()
-
-        self.anchors = {}
-        return node
-
-    def compose_node(self, parent, index):
-        if self.check_event(AliasEvent):
-            event = self.get_event()
-            alias = event.anchor
-            if alias not in self.anchors:
-                raise ComposerError(
-                    None, None, "found undefined alias %r"
-                    % utf8(alias), event.start_mark)
-            return self.anchors[alias]
-        event = self.peek_event()
-        anchor = event.anchor
-        if anchor is not None:  # have an anchor
-            if anchor in self.anchors:
-                raise ComposerError(
-                    "found duplicate anchor %r; first occurence"
-                    % utf8(anchor), self.anchors[anchor].start_mark,
-                    "second occurence", event.start_mark)
-        self.descend_resolver(parent, index)
-        if self.check_event(ScalarEvent):
-            node = self.compose_scalar_node(anchor)
-        elif self.check_event(SequenceStartEvent):
-            node = self.compose_sequence_node(anchor)
-        elif self.check_event(MappingStartEvent):
-            node = self.compose_mapping_node(anchor)
-        self.ascend_resolver()
-        return node
-
-    def compose_scalar_node(self, anchor):
-        event = self.get_event()
-        tag = event.tag
-        if tag is None or tag == u'!':
-            tag = self.resolve(ScalarNode, event.value, event.implicit)
-        node = ScalarNode(tag, event.value,
-                          event.start_mark, event.end_mark, style=event.style,
-                          comment=event.comment)
-        if anchor is not None:
-            self.anchors[anchor] = node
-        return node
-
-    def compose_sequence_node(self, anchor):
-        start_event = self.get_event()
-        tag = start_event.tag
-        if tag is None or tag == u'!':
-            tag = self.resolve(SequenceNode, None, start_event.implicit)
-        node = SequenceNode(tag, [],
-                            start_event.start_mark, None,
-                            flow_style=start_event.flow_style,
-                            comment=start_event.comment, anchor=anchor)
-        if anchor is not None:
-            self.anchors[anchor] = node
-        index = 0
-        while not self.check_event(SequenceEndEvent):
-            node.value.append(self.compose_node(node, index))
-            index += 1
-        end_event = self.get_event()
-        if node.flow_style is True and end_event.comment is not None:
-            if node.comment is not None:
-                print('Warning: unexpected end_event commment in sequence '
-                      'node {0}'.format(node.flow_style))
-            node.comment = end_event.comment
-        node.end_mark = end_event.end_mark
-        self.check_end_doc_comment(end_event, node)
-        return node
-
-    def compose_mapping_node(self, anchor):
-        start_event = self.get_event()
-        tag = start_event.tag
-        if tag is None or tag == u'!':
-            tag = self.resolve(MappingNode, None, start_event.implicit)
-        node = MappingNode(tag, [],
-                           start_event.start_mark, None,
-                           flow_style=start_event.flow_style,
-                           comment=start_event.comment, anchor=anchor)
-        if anchor is not None:
-            self.anchors[anchor] = node
-        while not self.check_event(MappingEndEvent):
-            # key_event = self.peek_event()
-            item_key = self.compose_node(node, None)
-            # if item_key in node.value:
-            #     raise ComposerError("while composing a mapping",
-            #             start_event.start_mark,
-            #             "found duplicate key", key_event.start_mark)
-            item_value = self.compose_node(node, item_key)
-            # node.value[item_key] = item_value
-            node.value.append((item_key, item_value))
-        end_event = self.get_event()
-        if node.flow_style is True and end_event.comment is not None:
-            node.comment = end_event.comment
-        node.end_mark = end_event.end_mark
-        self.check_end_doc_comment(end_event, node)
-        return node
-
-    def check_end_doc_comment(self, end_event, node):
-        if end_event.comment and end_event.comment[1]:
-            # pre comments on an end_event, no following to move to
-            if node.comment is None:
-                node.comment = [None, None]
-            assert not isinstance(node, ScalarEvent)
-            # this is a post comment on a mapping node, add as third element
-            # in the list
-            node.comment.append(end_event.comment[1])
-            end_event.comment[1] = None

lib/spack/external/ruamel/yaml/configobjwalker.py

@@ -1,9 +0,0 @@
-# coding: utf-8
-
-import warnings
-from ruamel.yaml.util import configobj_walker as new_configobj_walker
-
-
-def configobj_walker(cfg):
-    warnings.warn("configobj_walker has move to ruamel.yaml.util, please update your code")
-    return new_configobj_walker(cfg)