Add a new disinherit directive for extending packages

When you inherit from a package in Spack, you inherit all the metadata from its
directives, including `version`, `provides`, `depends_on`, `conflicts`, etc.

In some cases, you may not want this metadata. This PR adds a new `disinherit` directive
that allows you to throw out things inherited from the base class.  For example:

```python
from spack.pkg.builtin.mpich import Mpich

class MyMpich(Mpich):
    disinherit("versions")    # don't inherit any versions from builtin Mpich
    version("5.0", "08721a102fefcea2ae4add8c9cc548df77e9224f5385ad0872a9150fdd26a415")
    version("6.0", "9cc39dd33dd4227bb82301d285437588d705290846d22ab6b8791c7e631ce385")
```

Without the `disinherit("versions")` directive, this package would have versions `5.0`,
`6.0`, *and* anything inherited from `Mpich`. With it, this package has only versions
`5.0` and `6.0`.

You can `disinherit` any of: `conflicts`, `dependencies`, `extendees`, `patches`,
`provided`, `resources`, `variants`, or `versions`.

- [x] add new `disinherit directive`
- [x] Two packages were modifying their `versions` dictionary in their constructors to
      achieve this, but this causes `spack url stats` to fail with a concurrent
      modification exception as it iterates over all packages. Fixed these to use
      `disinherit` instead.
- [x] Update documentation
- [x] Add tests

.github/workflows/audit.yaml

@@ -19,8 +19,8 @@ jobs:
   package-audits:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984 # @v2
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
       with:
         python-version: ${{inputs.python_version}}
     - name: Install Python packages

.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@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
         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@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
         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@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
         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@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
         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@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
       - name: Bootstrap clingo
         run: |
           source share/spack/setup-env.sh
@@ -179,7 +179,7 @@ jobs:
         run: |
           brew install tree
       - name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
       - name: Bootstrap clingo
         run: |
           set -ex
@@ -204,7 +204,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
         with:
           fetch-depth: 0
       - name: Setup repo
@@ -214,7 +214,7 @@ jobs:
       - name: Bootstrap clingo
         run: |
           set -ex
-          for ver in '2.7' '3.6' '3.7' '3.8' '3.9' '3.10' ; do
+          for ver in '3.6' '3.7' '3.8' '3.9' '3.10' ; do
             not_found=1
             ver_dir="$(find $RUNNER_TOOL_CACHE/Python -wholename "*/${ver}.*/*/bin" | grep . || true)"
             echo "Testing $ver_dir"
@@ -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@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
         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@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
         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@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
       - 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@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
       - name: Bootstrap GnuPG
         run: |
           source share/spack/setup-env.sh

.github/workflows/build-containers.yml

@@ -50,7 +50,7 @@ jobs:
     if: github.repository == 'spack/spack'
     steps:
       - name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
 
       - name: Set Container Tag Normal (Nightly)
         run: |
@@ -80,7 +80,7 @@ jobs:
           fi
 
       - name: Upload Dockerfile
-        uses: actions/upload-artifact@83fd05a356d7e2593de66fc9913b3002723633cb
+        uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce
         with:
           name: dockerfiles
           path: dockerfiles
@@ -106,7 +106,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build & Deploy ${{ matrix.dockerfile[0] }}
-        uses: docker/build-push-action@c56af957549030174b10d6867f20e78cfd7debc5 # @v2
+        uses: docker/build-push-action@37abcedcc1da61a57767b7588cb9d03eb57e28b3 # @v2
         with:
           context: dockerfiles/${{ matrix.dockerfile[0] }}
           platforms: ${{ matrix.dockerfile[1] }}

.github/workflows/ci.yaml

@@ -20,12 +20,6 @@ jobs:
     uses: ./.github/workflows/valid-style.yml
     with:
       with_coverage: ${{ needs.changes.outputs.core }}
-  audit-ancient-python:
-    uses: ./.github/workflows/audit.yaml
-    needs: [ changes ]
-    with:
-      with_coverage: ${{ needs.changes.outputs.core }}
-      python_version: 2.7
   all-prechecks:
     needs: [ prechecks ]
     runs-on: ubuntu-latest
@@ -41,7 +35,7 @@ jobs:
       core: ${{ steps.filter.outputs.core }}
       packages: ${{ steps.filter.outputs.packages }}
     steps:
-      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
+      - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
         if: ${{ github.event_name == 'push' }}
         with:
           fetch-depth: 0
@@ -85,7 +79,7 @@ jobs:
     needs: [ prechecks ]
     uses: ./.github/workflows/windows_python.yml
   all:
-    needs: [ windows, unit-tests, bootstrap, audit-ancient-python ]
+    needs: [ windows, unit-tests, bootstrap ]
     runs-on: ubuntu-latest
     steps:
     - name: Success

.github/workflows/setup_git.ps1

@@ -1,15 +1,9 @@
-# (c) 2021 Lawrence Livermore National Laboratory
-
-Set-Location spack
+# (c) 2022 Lawrence Livermore National Laboratory
 
 git config --global user.email "spack@example.com"
 git config --global user.name "Test User"
 git config --global core.longpaths true
 
-# See https://github.com/git/git/security/advisories/GHSA-3wp6-j8xr-qw85 (CVE-2022-39253)
-# This is needed to let some fixture in our unit-test suite run
-git config --global protocol.file.allow always
-
 if ($(git branch --show-current) -ne "develop")
 {
     git branch develop origin/develop

.github/workflows/setup_git.sh

@@ -2,10 +2,6 @@
 git config --global user.email "spack@example.com"
 git config --global user.name "Test User"
 
-# See https://github.com/git/git/security/advisories/GHSA-3wp6-j8xr-qw85 (CVE-2022-39253)
-# This is needed to let some fixture in our unit-test suite run
-git config --global protocol.file.allow always
-
 # create a local pr base branch
 if [[ -n $GITHUB_BASE_REF ]]; then
     git fetch origin "${GITHUB_BASE_REF}:${GITHUB_BASE_REF}"

.github/workflows/unit_tests.yaml

@@ -11,39 +11,46 @@ concurrency:
 jobs:
   # Run unit tests with different configurations on linux
   ubuntu:
-    runs-on: ubuntu-20.04
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['2.7', '3.6', '3.7', '3.8', '3.9', '3.10', '3.11']
+        os: [ubuntu-latest]
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
         concretizer: ['clingo']
         on_develop:
         - ${{ github.ref == 'refs/heads/develop' }}
         include:
-        - python-version: 2.7
+        - python-version: '3.11'
+          os: ubuntu-latest
           concretizer: original
           on_develop: ${{ github.ref == 'refs/heads/develop' }}
-        - python-version: '3.11'
-          concretizer: original
+        - python-version: '3.6'
+          os: ubuntu-20.04
+          concretizer: clingo
           on_develop: ${{ github.ref == 'refs/heads/develop' }}
         exclude:
         - python-version: '3.7'
+          os: ubuntu-latest
           concretizer: 'clingo'
           on_develop: false
         - python-version: '3.8'
+          os: ubuntu-latest
           concretizer: 'clingo'
           on_develop: false
         - python-version: '3.9'
+          os: ubuntu-latest
           concretizer: 'clingo'
           on_develop: false
         - python-version: '3.10'
+          os: ubuntu-latest
           concretizer: 'clingo'
           on_develop: false
 
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984 # @v2
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install System packages
@@ -52,24 +59,11 @@ jobs:
           # Needed for unit tests
           sudo apt-get -y install \
               coreutils cvs gfortran graphviz gnupg2 mercurial ninja-build \
-              patchelf cmake bison libbison-dev kcov
+              cmake bison libbison-dev kcov
     - name: Install Python packages
       run: |
-          pip install --upgrade pip six setuptools pytest codecov[toml] pytest-xdist 
-          # Install pytest-cov only on recent Python, to avoid stalling on Python 2.7 due
-          # to bugs on an unmaintained version of the package when used with xdist.
-          if [[ ${{ matrix.python-version }} != "2.7" ]]; then
-            pip install --upgrade pytest-cov
-          fi
-          # ensure style checks are not skipped in unit tests for python >= 3.6
-          # note that true/false (i.e., 1/0) are opposite in conditions in python and bash
-          if python -c 'import sys; sys.exit(not sys.version_info >= (3, 6))'; then
-              pip install --upgrade flake8 "isort>=4.3.5" "mypy>=0.900" "click==8.0.4" "black<=21.12b0"
-          fi
-    - name: Pin pathlib for Python 2.7
-      if: ${{ matrix.python-version == 2.7 }}
-      run: |
-          pip install -U pathlib2==2.3.6 toml
+          pip install --upgrade pip six setuptools pytest codecov[toml] pytest-xdist pytest-cov
+          pip install --upgrade flake8 "isort>=4.3.5" "mypy>=0.900" "click" "black"
     - name: Setup git configuration
       run: |
           # Need this for the git tests to succeed.
@@ -82,6 +76,7 @@ jobs:
       run: |
           . share/spack/setup-env.sh
           spack bootstrap disable spack-install
+          spack bootstrap now
           spack -v solve zlib
     - name: Run unit tests
       env:
@@ -89,7 +84,7 @@ jobs:
           SPACK_TEST_SOLVER: ${{ matrix.concretizer }}
           SPACK_TEST_PARALLEL: 2
           COVERAGE: true
-          UNIT_TEST_COVERAGE: ${{ (matrix.python-version == '3.11') }}
+          UNIT_TEST_COVERAGE: ${{ matrix.python-version == '3.11' }}
       run: |
           share/spack/qa/run-unit-tests
     - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
@@ -99,10 +94,10 @@ jobs:
   shell:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984 # @v2
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
       with:
         python-version: '3.11'
     - name: Install System packages
@@ -138,7 +133,7 @@ jobs:
           dnf install -y \
               bzip2 curl file gcc-c++ gcc gcc-gfortran git gnupg2 gzip \
               make patch tcl unzip which xz
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
     - name: Setup repo and non-root user
       run: |
           git --version
@@ -150,25 +145,22 @@ jobs:
       shell: runuser -u spack-test -- bash {0}
       run: |
           source share/spack/setup-env.sh
-          spack -d solve zlib
+          spack -d bootstrap now --dev
           spack unit-test -k 'not cvs and not svn and not hg' -x --verbose
   # Test for the clingo based solver (using clingo-cffi)
   clingo-cffi:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984 # @v2
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
       with:
         python-version: '3.11'
     - name: Install System packages
       run: |
           sudo apt-get -y update
-          # Needed for unit tests
-          sudo apt-get -y install \
-              coreutils cvs gfortran graphviz gnupg2 mercurial ninja-build \
-              patchelf kcov
+          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
@@ -193,10 +185,10 @@ jobs:
       matrix:
         python-version: ["3.10"]
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984 # @v2
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install Python packages

.github/workflows/valid-style.yml

@@ -18,8 +18,8 @@ jobs:
   validate:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984 # @v2
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
       with:
         python-version: '3.11'
         cache: 'pip'
@@ -28,23 +28,23 @@ jobs:
         pip install --upgrade pip
         pip install --upgrade vermin
     - name: vermin (Spack's Core)
-      run: vermin --backport argparse --violations --backport typing -t=2.7- -t=3.6- -vvv lib/spack/spack/ lib/spack/llnl/ bin/
+      run: vermin --backport importlib --backport argparse --violations --backport typing -t=3.6- -vvv lib/spack/spack/ lib/spack/llnl/ bin/
     - name: vermin (Repositories)
-      run: vermin --backport argparse --violations --backport typing -t=2.7- -t=3.6- -vvv var/spack/repos
+      run: vermin --backport importlib --backport argparse --violations --backport typing -t=3.6- -vvv var/spack/repos
   # Run style checks on the files that have been changed
   style:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # @v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984 # @v2
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # @v2
       with:
         python-version: '3.11'
         cache: 'pip'
     - name: Install Python packages
       run: |
-        python3 -m pip install --upgrade pip six setuptools types-six click==8.0.2 'black==21.12b0' mypy isort clingo flake8
+        python3 -m pip install --upgrade pip six setuptools types-six black mypy isort clingo flake8
     - name: Setup git configuration
       run: |
         # Need this for the git tests to succeed.

.github/workflows/windows_python.yml

@@ -10,15 +10,15 @@ concurrency:
 defaults:
   run:
     shell:
-     powershell Invoke-Expression -Command ".\share\spack\qa\windows_test_setup.ps1"; {0}
+     powershell Invoke-Expression -Command "./share/spack/qa/windows_test_setup.ps1"; {0}
 jobs:
   unit-tests:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435
       with:
         python-version: 3.9
     - name: Install Python packages
@@ -26,13 +26,11 @@ jobs:
           python -m pip install --upgrade pip six pywin32 setuptools codecov pytest-cov clingo
     - name: Create local develop
       run: |
-        .\spack\.github\workflows\setup_git.ps1
+        ./.github/workflows/setup_git.ps1
     - name: Unit Test
       run: |
-        echo F|xcopy .\spack\share\spack\qa\configuration\windows_config.yaml $env:USERPROFILE\.spack\windows\config.yaml
-        cd spack
-        dir
         spack unit-test -x --verbose --cov --cov-config=pyproject.toml --ignore=lib/spack/spack/test/cmd
+        ./share/spack/qa/validate_last_exit.ps1
         coverage combine -a
         coverage xml
     - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
@@ -41,10 +39,10 @@ jobs:
   unit-tests-cmd:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435
       with:
         python-version: 3.9
     - name: Install Python packages
@@ -52,12 +50,11 @@ jobs:
           python -m pip install --upgrade pip six pywin32 setuptools codecov coverage pytest-cov clingo
     - name: Create local develop
       run: |
-        .\spack\.github\workflows\setup_git.ps1
+        ./.github/workflows/setup_git.ps1
     - name: Command Unit Test
       run: |
-        echo F|xcopy .\spack\share\spack\qa\configuration\windows_config.yaml $env:USERPROFILE\.spack\windows\config.yaml
-        cd spack
         spack unit-test -x --verbose --cov --cov-config=pyproject.toml lib/spack/spack/test/cmd
+        ./share/spack/qa/validate_last_exit.ps1
         coverage combine -a
         coverage xml
     - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
@@ -66,10 +63,10 @@ jobs:
   build-abseil:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984
+    - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435
       with:
         python-version: 3.9
     - name: Install Python packages
@@ -78,81 +75,81 @@ jobs:
     - name: Build Test
       run: |
         spack compiler find
-        echo F|xcopy .\spack\share\spack\qa\configuration\windows_config.yaml $env:USERPROFILE\.spack\windows\config.yaml
         spack external find cmake
         spack external find ninja
         spack -d install abseil-cpp
-  make-installer:
-    runs-on: windows-latest
-    steps:
-    - name: Disable Windows Symlinks
-      run: |
-        git config --global core.symlinks false
-      shell:
-        powershell
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
-      with:
-        fetch-depth: 0
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984
-      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 >> $GITHUB_PATH
-    - name: Run Installer
-      run: |
-        .\spack\share\spack\qa\setup_spack.ps1
-        spack make-installer -s spack -g SILENT pkg
-        echo "installer_root=$((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: ${{ env.installer_root}}\pkg\Spack.msi
-  execute-installer:
-    needs: make-installer
-    runs-on: windows-latest
-    defaults:
-      run:
-        shell: pwsh
-    steps:
-    - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984
-      with:
-        python-version: 3.9
-    - name: Install Python packages
-      run: |
-          python -m pip install --upgrade pip six pywin32 setuptools
-    - name: Setup installer directory
-      run: |
-        mkdir -p spack_installer
-        echo "spack_installer=$((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
+  # 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

CHANGELOG.md

@@ -1,49 +1,3 @@
-# v0.19.2 (2023-04-04)
-
-### Spack Bugfixes
-
-* Ignore global variant requirement for packages that do not define it (#35037)
-* Compiler wrapper: improved parsing of linker arguments (#35929, #35912)
-* Do not detect apple-clang as cce on macOS (#35974)
-* Views: fix support for optional Python extensions (#35489)
-* Views: fix issue where Python executable gets symlinked instead of copied (#34661)
-* Fix a bug where tests were not added when concretizing together (#35290)
-* Compiler flags: fix clang/apple-clang c/c++ standard flags (#35062)
-* Increase db timeout from 3s to 60s to improve stability of parallel installs (#35517)
-* Buildcache: improve error handling in downloads (#35568)
-* Module files for packages installed from buildcache have long placeholder paths abbreviated in configure args section (#36611)
-* Reduce verbosity of error messages regarding non-existing module files (#35502)
-* Ensure file with build environment variables is truncated when writing to it (#35673)
-* `spack config update` now works on active environments (#36542)
-* Fix an issue where spack.yaml got reformatted incorrectly (#36698)
-* Packages UPC++ and GASNet-EX were updated (#36629)
-
-
-# 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/haspywin.py

@@ -10,6 +10,7 @@ def getpywin():
     try:
         import win32con  # noqa: F401
     except ImportError:
+        print("pyWin32 not installed but is required...\nInstalling via pip:")
         subprocess.check_call([sys.executable, "-m", "pip", "-q", "install", "--upgrade", "pip"])
         subprocess.check_call([sys.executable, "-m", "pip", "-q", "install", "pywin32"])
 

bin/spack

@@ -31,13 +31,11 @@ import os
 import os.path
 import sys
 
-min_python3 = (3, 5)
+min_python3 = (3, 6)
 
-if sys.version_info[:2] < (2, 7) or (
-    sys.version_info[:2] >= (3, 0) and sys.version_info[:2] < min_python3
-):
+if sys.version_info[:2] < min_python3:
     v_info = sys.version_info[:3]
-    msg = "Spack requires Python 2.7 or %d.%d or higher " % min_python3
+    msg = "Spack requires Python %d.%d or higher " % min_python3
     msg += "You are running spack with Python %d.%d.%d." % v_info
     sys.exit(msg)
 

bin/spack_cmd.bat

@@ -52,7 +52,6 @@ if defined py_path (
 
 if defined py_exe (
     "%py_exe%" "%SPACK_ROOT%\bin\haspywin.py"
-    "%py_exe%" "%SPACK_ROOT%\bin\spack" external find python >NUL
 )
 
 set "EDITOR=notepad"

etc/spack/defaults/config.yaml

@@ -19,7 +19,7 @@ config:
   install_tree:
     root: $spack/opt/spack
     projections:
-      all: "${ARCHITECTURE}/${COMPILERNAME}-${COMPILERVER}/${PACKAGE}-${VERSION}-${HASH}"
+      all: "{architecture}/{compiler.name}-{compiler.version}/{name}-{version}-{hash}"
     # install_tree can include an optional padded length (int or boolean)
     # default is False (do not pad)
     # if padded_length is True, Spack will pad as close to the system max path
@@ -54,6 +54,11 @@ config:
   # are that it precludes its use as a system package and its ability to be
   # pip installable.
   #
+  # In Spack environment files, chaining onto existing system Spack
+  # installations, the $env variable can be used to download, cache and build
+  # into user-writable paths that are relative to the currently active
+  # environment.
+  #
   # In any case, if the username is not already in the path, Spack will append
   # the value of `$user` in an attempt to avoid potential conflicts between
   # users in shared temporary spaces.
@@ -176,7 +181,7 @@ 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: 60
+  db_lock_timeout: 3
 
 
   # How long to wait when attempting to modify a package (e.g. to install it).
@@ -214,4 +219,8 @@ config:
 
   # Number of seconds a buildcache's index.json is cached locally before probing
   # for updates, within a single Spack invocation. Defaults to 10 minutes.
-  binary_index_ttl: 600
+  binary_index_ttl: 600
+
+  flags:
+    # Whether to keep -Werror flags active in package builds.
+    keep_werror: 'none'

etc/spack/defaults/windows/packages.yaml

@@ -0,0 +1,21 @@
+# -------------------------------------------------------------------------
+# This file controls default concretization preferences for Spack.
+#
+# Settings here are versioned with Spack and are intended to provide
+# sensible defaults out of the box. Spack maintainers should edit this
+# file to keep it current.
+#
+# Users can override these settings by editing the following files.
+#
+# Per-spack-instance settings (overrides defaults):
+#   $SPACK_ROOT/etc/spack/packages.yaml
+#
+# Per-user settings (overrides default and site settings):
+#   ~/.spack/packages.yaml
+# -------------------------------------------------------------------------
+packages:
+  all:
+    compiler:
+    - msvc
+    providers:
+      mpi: [msmpi]

lib/spack/docs/binary_caches.rst

@@ -13,49 +13,51 @@ Some sites may encourage users to set up their own test environments
 before carrying out central installations, or some users may prefer to set
 up these environments on their own motivation. To reduce the load of
 recompiling otherwise identical package specs in different installations,
-installed packages can be put into build cache tarballs, uploaded to
+installed packages can be put into build cache tarballs, pushed to
 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.
 
---------------------------
-Creating build cache files
---------------------------
 
-A compressed tarball of an installed package is created. Tarballs are created
-for all of its link and run dependency packages as well. Compressed tarballs are
-signed with gpg and signature and tarball and put in a ``.spack`` file. Optionally,
-the rpaths (and ids and deps on macOS) can be changed to paths relative to
-the Spack install tree before the tarball is created.
+.. note::
+
+    We use the terms "build cache" and "mirror" often interchangeably. Mirrors
+    are used during installation both for sources and prebuilt packages. Build
+    caches refer to mirrors that provide prebuilt packages.
+
+
+----------------------
+Creating a build cache
+----------------------
 
 Build caches are created via:
 
 .. code-block:: console
 
-    $ spack buildcache create <spec>
+    $ spack buildcache create <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,
+signed with GPG. These tarballs and metadata files are then pushed to the
+provided binary cache, which can be a local directory or a remote URL.
 
-If you wanted to create a build cache in a local directory, you would provide
-the ``-d`` argument to target that directory, again also specifying the spec.
-Here is an example creating a local directory, "spack-cache" and creating
-build cache files for the "ninja" spec:
+Here is an example where a build cache is created in a local directory named
+"spack-cache", to which we push the "ninja" spec:
 
 .. code-block:: console
 
-    $ mkdir -p ./spack-cache
-    $ spack buildcache create -d ./spack-cache ninja
-    ==> Buildcache files will be output to file:///home/spackuser/spack/spack-cache/build_cache
-    gpgconf: socketdir is '/run/user/1000/gnupg'
-    gpg: using "E6DF6A8BD43208E4D6F392F23777740B7DBD643D" as default secret key for signing
+    $ spack buildcache create --allow-root ./spack-cache ninja
+    ==> Pushing binary packages to file:///home/spackuser/spack/spack-cache/build_cache
 
-Note that the targeted spec must already be installed. Once you have a build cache,
-you can add it as a mirror, discussed next.
+Not that ``ninja`` must be installed locally for this to work.
 
-.. warning::
+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.
 
-   Spack improved the format used for binary caches in v0.18. The entire v0.18 series
-   will be able to verify and install binary caches both in the new and in the old format.
-   Support for using the old format is expected to end in v0.19, so we advise users to
-   recreate relevant buildcaches using Spack v0.18 or higher.
+Once you have a build cache, you can add it as a mirror, discussed next.
 
 ---------------------------------------
 Finding or installing build cache files
@@ -66,10 +68,10 @@ with:
 
 .. code-block:: console
 
-    $ spack mirror add <name> <url>
+    $ spack mirror add <name> <url or path>
 
 
-Note that the url can be a web url _or_ a local filesystem location. In the previous
+Both web URLs and local paths on the filesystem can be specified. In the previous
 example, you might add the directory "spack-cache" and call it ``mymirror``:
 
 
@@ -94,7 +96,7 @@ this new build cache as follows:
 
 .. code-block:: console
 
-    $ spack buildcache update-index -d spack-cache/
+    $ spack buildcache update-index ./spack-cache
 
 Now you can use list:
 
@@ -105,46 +107,38 @@ Now you can use list:
     -- linux-ubuntu20.04-skylake / gcc@9.3.0 ------------------------
     ninja@1.10.2
 
-
-Great! So now let's say you have a different spack installation, or perhaps just
-a different environment for the same one, and you want to install a package from
-that build cache. Let's first uninstall the actual library "ninja" to see if we can
-re-install it from the cache.
+With ``mymirror`` configured and an index available, Spack will automatically
+use it during concretization and installation. That means that you can expect
+``spack install ninja`` to fetch prebuilt packages from the mirror. Let's
+verify by re-installing ninja:
 
 .. code-block:: console
 
     $ spack uninstall ninja
-
-
-And now reinstall from the buildcache
-
-.. code-block:: console
-
-    $ spack buildcache install ninja
-    ==> buildcache spec(s) matching ninja 
-    ==> Fetching file:///home/spackuser/spack/spack-cache/build_cache/linux-ubuntu20.04-skylake/gcc-9.3.0/ninja-1.10.2/linux-ubuntu20.04-skylake-gcc-9.3.0-ninja-1.10.2-i4e5luour7jxdpc3bkiykd4imke3mkym.spack
-    ####################################################################################################################################### 100.0%
-    ==> Installing buildcache for spec ninja@1.10.2%gcc@9.3.0 arch=linux-ubuntu20.04-skylake
-    gpgconf: socketdir is '/run/user/1000/gnupg'
-    gpg: Signature made Tue 23 Mar 2021 10:16:29 PM MDT
-    gpg:                using RSA key E6DF6A8BD43208E4D6F392F23777740B7DBD643D
-    gpg: Good signature from "spackuser (GPG created for Spack) <spackuser@noreply.users.github.com>" [ultimate]
+    $ spack install ninja
+    ==> Installing ninja-1.11.1-yxferyhmrjkosgta5ei6b4lqf6bxbscz
+    ==> Fetching file:///home/spackuser/spack/spack-cache/build_cache/linux-ubuntu20.04-skylake-gcc-9.3.0-ninja-1.10.2-yxferyhmrjkosgta5ei6b4lqf6bxbscz.spec.json.sig
+    gpg: Signature made Do 12 Jan 2023 16:01:04 CET
+    gpg:                using RSA key 61B82B2B2350E171BD17A1744E3A689061D57BF6
+    gpg: Good signature from "example (GPG created for Spack) <example@example.com>" [ultimate]
+    ==> Fetching file:///home/spackuser/spack/spack-cache/build_cache/linux-ubuntu20.04-skylake/gcc-9.3.0/ninja-1.10.2/linux-ubuntu20.04-skylake-gcc-9.3.0-ninja-1.10.2-yxferyhmrjkosgta5ei6b4lqf6bxbscz.spack
+    ==> Extracting ninja-1.10.2-yxferyhmrjkosgta5ei6b4lqf6bxbscz from binary cache
+    ==> ninja: Successfully installed ninja-1.11.1-yxferyhmrjkosgta5ei6b4lqf6bxbscz
+    Search: 0.00s.  Fetch: 0.17s.  Install: 0.12s.  Total: 0.29s
+    [+] /home/harmen/spack/opt/spack/linux-ubuntu20.04-skylake/gcc-9.3.0/ninja-1.11.1-yxferyhmrjkosgta5ei6b4lqf6bxbscz
 
 
 It worked! You've just completed a full example of creating a build cache with
-a spec of interest, adding it as a mirror, updating it's index, listing the contents,
+a spec of interest, adding it as a mirror, updating its index, listing the contents,
 and finally, installing from it.
 
-
-Note that the above command is intended to install a particular package to a
-build cache you have created, and not to install a package from a build cache.
-For the latter, once a mirror is added, by default when you do ``spack install`` the ``--use-cache``
-flag is set, and you will install a package from a build cache if it is available.
-If you want to always use the cache, you can do:
+By default Spack falls back to building from sources when the mirror is not available
+or when the package is simply not already available. To force Spack to only install
+prebuilt packages, you can use
 
 .. code-block:: console
 
-   $ spack install --cache-only <package>
+   $ spack install --use-buildcache only <package>
 
 For example, to combine all of the commands above to add the E4S build cache
 and then install from it exclusively, you would do:
@@ -153,7 +147,7 @@ and then install from it exclusively, you would do:
 
     $ spack mirror add E4S https://cache.e4s.io
     $ spack buildcache keys --install --trust
-    $ spack install --cache-only <package>
+    $ spack install --use-buildache only <package>
 
 We use ``--install`` and ``--trust`` to say that we are installing keys to our
 keyring, and trusting all downloaded keys.

lib/spack/docs/build_settings.rst

@@ -272,7 +272,7 @@ Selection of the target microarchitectures
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 The options under the ``targets`` attribute control which targets are considered during a solve.
-Currently the options in this section are only configurable from the ``concretization.yaml`` file
+Currently the options in this section are only configurable from the ``concretizer.yaml`` file
 and there are no corresponding command line arguments to enable them for a single solve.
 
 The ``granularity`` option can take two possible values: ``microarchitectures`` and ``generic``.

lib/spack/docs/build_systems/cachedcmakepackage.rst

@@ -5,9 +5,9 @@
 
 .. _cachedcmakepackage:
 
-------------------
-CachedCMakePackage
-------------------
+-----------
+CachedCMake
+-----------
 
 The CachedCMakePackage base class is used for CMake-based workflows
 that create a CMake cache file prior to running ``cmake``. This is

lib/spack/docs/build_systems/cudapackage.rst

@@ -5,9 +5,9 @@
 
 .. _cudapackage:
 
------------
-CudaPackage
------------
+----
+Cuda
+----
 
 Different from other packages, ``CudaPackage`` does not represent a build system.
 Instead its goal is to simplify and unify usage of ``CUDA`` in other packages by providing a `mixin-class <https://en.wikipedia.org/wiki/Mixin>`_.
@@ -80,7 +80,7 @@ standard CUDA compiler flags.
 
 **cuda_flags**
 
-    This built-in static method returns a list of command line flags 
+    This built-in static method returns a list of command line flags
     for the chosen ``cuda_arch`` value(s).  The flags are intended to
     be passed to the CUDA compiler driver (i.e., ``nvcc``).
 

lib/spack/docs/build_systems/inteloneapipackage.rst

@@ -6,9 +6,9 @@
 .. _inteloneapipackage:
 
 
-====================
- IntelOneapiPackage
-====================
+===========
+IntelOneapi
+===========
 
 
 .. contents::
@@ -36,7 +36,7 @@ For more information on a specific package, do::
 
 Intel no longer releases new versions of Parallel Studio, which can be
 used in Spack via the :ref:`intelpackage`. All of its components can
-now be found in oneAPI. 
+now be found in oneAPI.
 
 Examples
 ========

lib/spack/docs/build_systems/intelpackage.rst

@@ -5,9 +5,9 @@
 
 .. _intelpackage:
 
-------------
-IntelPackage
-------------
+-----
+Intel
+-----
 
 .. contents::
 

lib/spack/docs/build_systems/pythonpackage.rst

@@ -5,9 +5,9 @@
 
 .. _pythonpackage:
 
--------------
-PythonPackage
--------------
+------
+Python
+------
 
 Python packages and modules have their own special build system. This
 documentation covers everything you'll need to know in order to write

lib/spack/docs/build_systems/rocmpackage.rst

@@ -5,9 +5,9 @@
 
 .. _rocmpackage:
 
------------
-ROCmPackage
------------
+----
+ROCm
+----
 
 The ``ROCmPackage`` is not a build system but a helper package. Like ``CudaPackage``,
 it provides standard variants, dependencies, and conflicts to facilitate building
@@ -25,7 +25,7 @@ This package provides the following variants:
 
 * **rocm**
 
-  This variant is used to enable/disable building with ``rocm``.  
+  This variant is used to enable/disable building with ``rocm``.
   The default is disabled (or ``False``).
 
 * **amdgpu_target**

lib/spack/docs/build_systems/rpackage.rst

@@ -5,9 +5,9 @@
 
 .. _rpackage:
 
---------
-RPackage
---------
+--
+R
+--
 
 Like Python, R has its own built-in build system.
 

lib/spack/docs/build_systems/sourceforgepackage.rst

@@ -5,15 +5,15 @@
 
 .. _sourceforgepackage:
 
-------------------
-SourceforgePackage
-------------------
+-----------
+Sourceforge
+-----------
 
-``SourceforgePackage`` is a 
+``SourceforgePackage`` is a
 `mixin-class <https://en.wikipedia.org/wiki/Mixin>`_. It automatically
 sets the URL based on a list of Sourceforge mirrors listed in
 `sourceforge_mirror_path`, which defaults to a half dozen known mirrors.
-Refer to the package source 
+Refer to the package source
 (`<https://github.com/spack/spack/blob/develop/lib/spack/spack/build_systems/sourceforge.py>`__) for the current list of mirrors used by Spack.
 
 
@@ -29,7 +29,7 @@ This package provides a method for populating mirror URLs.
     It is decorated with `property` so its results are treated as
     a package attribute.
 
-    Refer to 
+    Refer to
     `<https://spack.readthedocs.io/en/latest/packaging_guide.html#mirrors-of-the-main-url>`__
     for information on how Spack uses the `urls` attribute during
     fetching.

lib/spack/docs/conf.py

@@ -36,13 +36,7 @@
 if not os.path.exists(link_name):
     os.symlink(os.path.abspath("../../.."), link_name, target_is_directory=True)
 sys.path.insert(0, os.path.abspath("_spack_root/lib/spack/external"))
-sys.path.insert(0, os.path.abspath("_spack_root/lib/spack/external/pytest-fallback"))
-
-if sys.version_info[0] < 3:
-    sys.path.insert(0, os.path.abspath("_spack_root/lib/spack/external/yaml/lib"))
-else:
-    sys.path.insert(0, os.path.abspath("_spack_root/lib/spack/external/yaml/lib3"))
-
+sys.path.insert(0, os.path.abspath("_spack_root/lib/spack/external/_vendoring"))
 sys.path.append(os.path.abspath("_spack_root/lib/spack/"))
 
 # Add the Spack bin directory to the path so that we can use its output in docs.
@@ -80,8 +74,16 @@
     "--force",  # Overwrite existing files
     "--no-toc",  # Don't create a table of contents file
     "--output-dir=.",  # Directory to place all output
+    "--module-first",  # emit module docs before submodule docs
 ]
-sphinx_apidoc(apidoc_args + ["_spack_root/lib/spack/spack"])
+sphinx_apidoc(
+    apidoc_args
+    + [
+        "_spack_root/lib/spack/spack",
+        "_spack_root/lib/spack/spack/test/*.py",
+        "_spack_root/lib/spack/spack/test/cmd/*.py",
+    ]
+)
 sphinx_apidoc(apidoc_args + ["_spack_root/lib/spack/llnl"])
 
 # Enable todo items
@@ -160,8 +162,8 @@ def setup(sphinx):
 master_doc = "index"
 
 # General information about the project.
-project = u"Spack"
-copyright = u"2013-2021, Lawrence Livermore National Laboratory."
+project = "Spack"
+copyright = "2013-2021, Lawrence Livermore National Laboratory."
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -206,12 +208,14 @@ def setup(sphinx):
     ("py:class", "_frozen_importlib_external.SourceFileLoader"),
     ("py:class", "clingo.Control"),
     ("py:class", "six.moves.urllib.parse.ParseResult"),
+    ("py:class", "TextIO"),
     # Spack classes that are private and we don't want to expose
     ("py:class", "spack.provider_index._IndexBase"),
     ("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.spec.DependencySpec"),
 ]
 
 # The reST default role (used for this markup: `text`) to use for all documents.
@@ -350,7 +354,7 @@ class SpackStyle(DefaultStyle):
 # 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", u"Spack Documentation", u"Todd Gamblin", "manual"),
+    ("index", "Spack.tex", "Spack Documentation", "Todd Gamblin", "manual"),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -378,7 +382,7 @@ class SpackStyle(DefaultStyle):
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [("index", "spack", u"Spack Documentation", [u"Todd Gamblin"], 1)]
+man_pages = [("index", "spack", "Spack Documentation", ["Todd Gamblin"], 1)]
 
 # If true, show URL addresses after external links.
 # man_show_urls = False
@@ -393,8 +397,8 @@ class SpackStyle(DefaultStyle):
     (
         "index",
         "Spack",
-        u"Spack Documentation",
-        u"Todd Gamblin",
+        "Spack Documentation",
+        "Todd Gamblin",
         "Spack",
         "One line description of project.",
         "Miscellaneous",

lib/spack/docs/configuration.rst

@@ -394,7 +394,7 @@ are indicated at the start of the path with ``~`` or ``~user``.
 Spack-specific variables
 ^^^^^^^^^^^^^^^^^^^^^^^^
 
-Spack understands several special variables. These are:
+Spack understands over a dozen special variables. These are:
 
 * ``$env``: name of the currently active :ref:`environment <environments>`
 * ``$spack``: path to the prefix of this Spack installation
@@ -416,6 +416,8 @@ Spack understands several special variables. These are:
   ArchSpec. E.g. ``skylake`` or ``neoverse-n1``.
 * ``$target_family``. The target family for the current host, as
   detected by ArchSpec. E.g. ``x86_64`` or ``aarch64``.
+* ``$date``: the current date in the format YYYY-MM-DD
+
 
 Note that, as with shell variables, you can write these as ``$varname``
 or with braces to distinguish the variable from surrounding characters:

lib/spack/docs/developer_guide.rst

@@ -175,14 +175,11 @@ Spec-related modules
 ^^^^^^^^^^^^^^^^^^^^
 
 :mod:`spack.spec`
-  Contains :class:`~spack.spec.Spec` and :class:`~spack.spec.SpecParser`.
-  Also implements most of the logic for normalization and concretization
+  Contains :class:`~spack.spec.Spec`. Also implements most of the logic for concretization
   of specs.
 
-:mod:`spack.parse`
-  Contains some base classes for implementing simple recursive descent
-  parsers: :class:`~spack.parse.Parser` and :class:`~spack.parse.Lexer`.
-  Used by :class:`~spack.spec.SpecParser`.
+:mod:`spack.parser`
+  Contains :class:`~spack.parser.SpecParser` and functions related to parsing specs.
 
 :mod:`spack.concretize`
   Contains :class:`~spack.concretize.Concretizer` implementation,
@@ -235,7 +232,7 @@ Spack Subcommands
 Unit tests
 ^^^^^^^^^^
 
-:mod:`spack.test`
+``spack.test``
   Implements Spack's test suite.  Add a module and put its name in
   the test suite in ``__init__.py`` to add more unit tests.
 

lib/spack/docs/environments.rst

@@ -1070,19 +1070,23 @@ the include is conditional.
 Building a subset of the environment
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-The generated ``Makefile``\s contain install targets for each spec. Given the hash
-of a particular spec, you can use the ``.install/<hash>`` target to install the
-spec with its dependencies. There is also ``.install-deps/<hash>`` to *only* install
+The generated ``Makefile``\s contain install targets for each spec, identified
+by ``<name>-<version>-<hash>``. This allows you to install only a subset of the
+packages in the environment. When packages are unique in the environment, it's
+enough to know the name and let tab-completion fill out the version and hash.
+
+The following phony targets are available: ``install/<spec>`` to install the
+spec with its dependencies, and ``install-deps/<spec>`` to *only* install
 its dependencies. This can be useful when certain flags should only apply to
 dependencies. Below we show a use case where a spec is installed with verbose
 output (``spack install --verbose``) while its dependencies are installed silently:
 
 .. code:: console
 
-   $ spack env depfile -o Makefile --make-target-prefix my_env
+   $ spack env depfile -o Makefile
 
    # Install dependencies in parallel, only show a log on error.
-   $ make -j16 my_env/.install-deps/<hash> SPACK_INSTALL_FLAGS=--show-log-on-error
+   $ make -j16 install-deps/python-3.11.0-<hash> SPACK_INSTALL_FLAGS=--show-log-on-error
 
    # Install the root spec with verbose output.
-   $ make -j16 my_env/.install/<hash> SPACK_INSTALL_FLAGS=--verbose
+   $ make -j16 install/python-3.11.0-<hash> SPACK_INSTALL_FLAGS=--verbose

lib/spack/docs/getting_started.rst

@@ -21,8 +21,9 @@ 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, XCode is required.  Spack is designed to run on HPC
-platforms like Cray.  Not all packages should be expected
+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.
 
 A build matrix showing which packages are working on which systems is shown below.
@@ -1704,9 +1705,11 @@ dependencies or incompatible build tools like autoconf. Here are several
 packages known to work on Windows:
 
 * abseil-cpp
+* bzip2
 * clingo
 * cpuinfo
 * cmake
+* hdf5
 * glm
 * nasm
 * netlib-lapack (requires Intel Fortran)

lib/spack/docs/packaging_guide.rst

@@ -34,6 +34,15 @@ ubiquitous in the scientific software community. Second, it's a modern
 language and has many powerful features to help make package writing
 easy.
 
+.. warning::
+
+   As a general rule, packages should install the software *from source*.
+   The only exception is for proprietary software (e.g., vendor compilers).
+
+   If a special build system needs to be added in order to support building
+   a package from source, then the associated code and recipe need to be added
+   first.
+
 
 .. _installation_procedure:
 
@@ -2397,13 +2406,15 @@ this because uninstalling the dependency would break the package.
 
 ``build``, ``link``, and ``run`` dependencies all affect the hash of Spack
 packages (along with ``sha256`` sums of patches and archives used to build the
-package, and a [canonical hash](https://github.com/spack/spack/pull/28156) of
+package, and a `canonical hash <https://github.com/spack/spack/pull/28156>`_ of
 the ``package.py`` recipes). ``test`` dependencies do not affect the package
 hash, as they are only used to construct a test environment *after* building and
 installing a given package installation. Older versions of Spack did not include
 build dependencies in the hash, but this has been
-[fixed](https://github.com/spack/spack/pull/28504) as of [Spack
-``v0.18``](https://github.com/spack/spack/releases/tag/v0.18.0)
+`fixed <https://github.com/spack/spack/pull/28504>`_ as of |Spack v0.18|_.
+
+.. |Spack v0.18| replace:: Spack ``v0.18``
+.. _Spack v0.18: https://github.com/spack/spack/releases/tag/v0.18.0
 
 If the dependency type is not specified, Spack uses a default of
 ``('build', 'link')``. This is the common case for compiler languages.
@@ -3593,6 +3604,70 @@ In the example above ``Cp2k`` inherits all the conflicts and variants that ``Cud
 
 .. _install-environment:
 
+--------------------------------
+Package Inheritance
+--------------------------------
+
+Spack packages are Python classes, and you can use inheritance with them just as you can
+with any Python class. This is common when you have your own package :ref:`repository
+<repositories>` with packages that extend Spack's ``builtin`` packages.
+
+You can extend a ``builtin`` package like this:
+
+.. code-block:: python
+
+   from spack.pkg.builtin.mpich import Mpich
+
+   class MyPackage(Mpich):
+       version("1.0", "0209444070d9c8af9b62c94095a217e3bc6843692d1e3fdc1ff5371e03aac47c")
+       version("2.0", "5dda192154047d6296ba14a4ab2d869c6926fd7f44dce8ce94f63aae2e359c5b")
+
+Every repository registered with Spack ends up in a submodule of ``spack.pkg`` with a
+name corresponding to its :ref:`namespace <namespaces>`. So, if you have a different
+repository with namespace ``myrepo`` you want to import packages from , you might write:
+
+.. code-block:: python
+
+   from spack.pkg.myrepo.my_package import MyPackage
+
+   class NewPackage(MyPackage):
+       version("3.0", "08721a102fefcea2ae4add8c9cc548df77e9224f5385ad0872a9150fdd26a415")
+       version("4.0", "9cc39dd33dd4227bb82301d285437588d705290846d22ab6b8791c7e631ce385")
+
+^^^^^^^^^^^^^^^^^^^^^^^^
+``disinherit``
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+When you inherit from a package in Spack, you inherit all the metadata from its
+directives, including ``version``, ``provides``, ``depends_on``, ``conflicts``, etc. For
+example, ``NewPackage`` above will have four versions: ``1.0`` and ``2.0`` inherited
+from ``MyPackage``, as well as, ``3.0``, and ``4.0`` defined in ``NewPackage``.
+
+If you do not want your package to define all the same things as its base class, you can
+use the ``disinherit`` directive to start fresh in your subclass:
+
+.. code-block:: python
+
+   from spack.pkg.myrepo.my_package import MyPackage
+
+   class NewerPackage(MyPackage):
+       disinherit("versions")    # don't inherit any versions from MyPackage
+       version("5.0", "08721a102fefcea2ae4add8c9cc548df77e9224f5385ad0872a9150fdd26a415")
+       version("6.0", "9cc39dd33dd4227bb82301d285437588d705290846d22ab6b8791c7e631ce385")
+
+Now, ``NewerPackage`` will have **only** versions ``5.0`` and ``6.0``, and will not
+inherit ``1.0`` or ``2.0`` from ``MyPackage``. You can ``disinherit`` many different
+properties from base packages. The full list of options is:
+
+* ``conflicts``
+* ``dependencies``
+* ``extendees``
+* ``patches``
+* ``provided``
+* ``resources``
+* ``variants``
+* ``versions``
+
 -----------------------
 The build environment
 -----------------------

lib/spack/docs/replace_conda_homebrew.rst

@@ -184,13 +184,48 @@ simply run the following commands:
 .. code-block:: console
 
    $ spack env activate myenv
-   $ spack concretize --force
+   $ spack concretize --fresh --force
    $ spack install
 
-The ``--force`` flag tells Spack to overwrite its previous concretization
-decisions, allowing you to choose a new version of Python. If any of the new
-packages like Bash are already installed, ``spack install`` won't re-install
-them, it will keep the symlinks in place.
+The ``--fresh`` flag tells Spack to use the latest version of every package
+where possible instead of trying to optimize for reuse of existing installed
+packages.
+
+The ``--force`` flag in addition tells Spack to overwrite its previous 
+concretization decisions, allowing you to choose a new version of Python. 
+If any of the new packages like Bash are already installed, ``spack install`` 
+won't re-install them, it will keep the symlinks in place.
+
+-----------------------------------
+Updating & Cleaning Up Old Packages
+-----------------------------------
+
+If you're looking to mimic the behavior of Homebrew, you may also want to 
+clean up out-of-date packages from your environment after an upgrade. To 
+upgrade your entire software stack within an environment and clean up old 
+package versions, simply run the following commands:
+
+.. code-block:: console
+
+   $ spack env activate myenv
+   $ spack mark -i --all
+   $ spack concretize --fresh --force
+   $ spack install
+   $ spack gc
+   
+Running ``spack mark -i --all`` tells Spack to mark all of the existing 
+packages within an environment as "implicitly" installed. This tells 
+spack's garbage collection system that these packages should be cleaned up.
+
+Don't worry however, this will not remove your entire environment.
+Running ``spack install`` will reexamine your spack environment after
+a fresh concretization and will re-mark any packages that should remain
+installed as "explicitly" installed.
+
+**Note:** if you use multiple spack environments you should re-run ``spack install``
+in each of your environments prior to running ``spack gc`` to prevent spack 
+from uninstalling any shared packages that are no longer required by the 
+environment you just upgraded.
 
 --------------
 Uninstallation

lib/spack/docs/repositories.rst

@@ -91,6 +91,8 @@ packages and use the first valid file:
   to eventually support URLs in ``repos.yaml``, so that you can easily
   point to remote package repositories, but that is not yet implemented.
 
+.. _namespaces:
+
 ---------------------
 Namespaces
 ---------------------
@@ -426,36 +428,3 @@ By path:
   $ spack repo list
   ==> 1 package repository.
   builtin    ~/spack/var/spack/repos/builtin
-
---------------------------------
-Repo namespaces and Python
---------------------------------
-
-You may have noticed that namespace notation for repositories is similar
-to the notation for namespaces in Python.  As it turns out, you *can*
-treat Spack repositories like Python packages; this is how they are
-implemented.
-
-You could, for example, extend a ``builtin`` package in your own
-repository:
-
-.. code-block:: python
-
-   from spack.pkg.builtin.mpich import Mpich
-
-   class MyPackage(Mpich):
-       ...
-
-Spack repo namespaces are actually Python namespaces tacked on under
-``spack.pkg``.  The search semantics of ``repos.yaml`` are actually
-implemented using Python's built-in `sys.path
-<https://docs.python.org/2/library/sys.html#sys.path>`_ search.  The
-:py:mod:`spack.repo` module implements a custom `Python importer
-<https://docs.python.org/2/library/imp.html>`_.
-
-.. warning::
-
-   The mechanism for extending packages is not yet extensively tested,
-   and extending packages across repositories imposes inter-repo
-   dependencies, which may be hard to manage.  Use this feature at your
-   own risk, but let us know if you have a use case for it.

lib/spack/docs/tables/system_prerequisites.csv

@@ -1,5 +1,5 @@
 Name, Supported Versions, Notes, Requirement Reason
-Python, 2.7/3.6-3.11, , Interpreter for Spack
+Python, 3.6--3.11, , Interpreter for Spack
 C/C++ Compilers, , , Building software
 make, , , Build software
 patch, , , Build software

lib/spack/env/cc

@@ -427,55 +427,6 @@ isystem_include_dirs_list=""
 libs_list=""
 other_args_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
-
-parse_Wl() {
-    # drop -Wl
-    shift
-    while [ $# -ne 0 ]; do
-    if [ "$wl_expect_rpath" = yes ]; then
-        if system_dir "$1"; then
-            append system_rpath_dirs_list "$1"
-        else
-            append rpath_dirs_list "$1"
-        fi
-        wl_expect_rpath=no
-    else
-        case "$1" in
-            -rpath=*)
-                arg="${1#-rpath=}"
-                if system_dir "$arg"; then
-                    append system_rpath_dirs_list "$arg"
-                else
-                    append rpath_dirs_list "$arg"
-                fi
-                ;;
-            --rpath=*)
-                arg="${1#--rpath=}"
-                if system_dir "$arg"; then
-                    append system_rpath_dirs_list "$arg"
-                else
-                    append rpath_dirs_list "$arg"
-                fi
-                ;;
-            -rpath|--rpath)
-                wl_expect_rpath=yes
-                ;;
-            "$dtags_to_strip")
-                ;;
-            *)
-                append other_args_list "-Wl,$1"
-                ;;
-        esac
-    fi
-    shift
-    done
-}
-
 
 while [ $# -ne 0 ]; do
 
@@ -489,6 +440,47 @@ while [ $# -ne 0 ]; do
         continue
     fi
 
+    if [ -n "${SPACK_COMPILER_FLAGS_KEEP}" ] ; then
+        # NOTE: the eval is required to allow `|` alternatives inside the variable
+        eval "\
+        case \"\$1\" in
+            $SPACK_COMPILER_FLAGS_KEEP)
+                append other_args_list \"\$1\"
+                shift
+                continue
+                ;;
+        esac
+        "
+    fi
+    # the replace list is a space-separated list of pipe-separated pairs,
+    # the first in each pair is the original prefix to be matched, the
+    # second is the replacement prefix
+    if [ -n "${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}"
@@ -534,77 +526,88 @@ while [ $# -ne 0 ]; do
             append other_args_list "-l$arg"
             ;;
         -Wl,*)
-            IFS=,
-            parse_Wl $1
-            unset IFS
+            arg="${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)
-            shift
-            if [ $# -eq 0 ]; then
-                # -Xlinker without value: let the compiler error about it.
-                append other_args_list -Xlinker
-                xlinker_expect_rpath=no
-                break
-            elif [ "$xlinker_expect_rpath" = yes ]; then
-                # Register the path of -Xlinker -rpath <other args> -Xlinker <path>
-                if system_dir "$1"; then
-                    append system_rpath_dirs_list "$1"
-                else
-                    append rpath_dirs_list "$1"
+            if [ "$2" = "-rpath" ]; then
+                if [ "$3" != "-Xlinker" ]; then
+                    die "-Xlinker,-rpath was not followed by -Xlinker,*"
                 fi
-                xlinker_expect_rpath=no
+                shift 3;
+                rp="$1"
+            elif [ "$2" = "$dtags_to_strip" ]; then
+                shift  # We want to remove explicitly this flag
             else
-                case "$1" in
-                    -rpath=*)
-                        arg="${1#-rpath=}"
-                        if system_dir "$arg"; then
-                            append system_rpath_dirs_list "$arg"
-                        else
-                            append rpath_dirs_list "$arg"
-                        fi
-                        ;;
-                    --rpath=*)
-                        arg="${1#--rpath=}"
-                        if system_dir "$arg"; then
-                            append system_rpath_dirs_list "$arg"
-                        else
-                            append rpath_dirs_list "$arg"
-                        fi
-                        ;;
-                    -rpath|--rpath)
-                        xlinker_expect_rpath=yes
-                        ;;
-                    "$dtags_to_strip")
-                        ;;
-                    *)
-                        append other_args_list -Xlinker
-                        append other_args_list "$1"
-                        ;;
-                esac
+                append other_args_list "$1"
             fi
             ;;
-        "$dtags_to_strip")
-            ;;
         *)
-            append other_args_list "$1"
+            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
 
-# 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 [ "$xlinker_expect_rpath" = yes ]; then
-    append other_args_list -Xlinker
-    append other_args_list -rpath
-fi
-
-# Same, but for -Wl flags.
-if [ "$wl_expect_rpath" = yes ]; then
-    append other_args_list -Wl,-rpath
-fi
-
 #
 # Add flags from Spack's cppflags, cflags, cxxflags, fcflags, fflags, and
 # ldflags. We stick to the order that gmake puts the flags in by default.

lib/spack/external/__init__.py

@@ -11,25 +11,14 @@
 
 * Homepage: https://altgraph.readthedocs.io/en/latest/index.html
 * Usage: dependency of macholib
-* Version: 0.17.2
+* Version: 0.17.3
 
 archspec
 --------
 
 * Homepage: https://pypi.python.org/pypi/archspec
 * Usage: Labeling, comparison and detection of microarchitectures
-* Version: 0.2.0 (commit 77640e572725ad97f18e63a04857155752ace045)
-
-argparse
---------
-
-* Homepage: https://pypi.python.org/pypi/argparse
-* Usage: We include our own version to be Python 3.X compatible.
-* Version: 1.4.0
-* Note: This package has been slightly modified to improve
-  error message formatting. See the following commit if the
-  vendored copy ever needs to be updated again:
-  https://github.com/spack/spack/pull/6786/commits/dfcef577b77249106ea4e4c69a6cd9e64fa6c418
+* Version: 0.2.0 (commit e44bad9c7b6defac73696f64078b2fe634719b62)
 
 astunparse
 ----------------
@@ -52,7 +41,7 @@
 
 * Homepage: https://github.com/python-attrs/attrs
 * Usage: Needed by jsonschema.
-* Version: 21.2.0 (83d3cd70f90a3f4d19ee8b508e58d1c58821c0ad)
+* Version: 22.1.0
 
 ctest_log_parser
 ----------------
@@ -67,21 +56,14 @@
 
 * Homepage: https://pypi.python.org/pypi/distro
 * Usage: Provides a more stable linux distribution detection.
-* Version: 1.6.0 (64946a1e2a9ff529047070657728600e006c99ff)
-* Note: Last version supporting Python 2.7
-
-functools32
------------
-* Homepage: https://github.com/MiCHiLU/python-functools32
-* Usage: Needed by jsonschema when using Python 2.7.
-* Version: 3.2.3-2
+* Version: 1.8.0
 
 jinja2
 ------
 
 * Homepage: https://pypi.python.org/pypi/Jinja2
 * Usage: A modern and designer-friendly templating language for Python.
-* Version: 2.11.3 (last version supporting Python 2.7)
+* Version: 3.0.3 (last version supporting Python 3.6)
 
 jsonschema
 ----------
@@ -96,44 +78,21 @@
 
 * Homepage: https://macholib.readthedocs.io/en/latest/index.html#
 * Usage: Manipulation of Mach-o binaries for relocating macOS buildcaches on Linux
-* Version: 1.15.2
+* Version: 1.16.2
 
 markupsafe
 ----------
 
 * Homepage: https://pypi.python.org/pypi/MarkupSafe
 * Usage: Implements a XML/HTML/XHTML Markup safe string for Python.
-* Version: 1.1.1 (last version supporting Python 2.7)
-
-py
---
-
-* Homepage: https://pypi.python.org/pypi/py
-* Usage: Needed by pytest. Library with cross-python path,
-  ini-parsing, io, code, and log facilities.
-* Version: 1.4.34 (last version supporting Python 2.6)
-* Note: This packages has been modified:
-  * https://github.com/pytest-dev/py/pull/186 was backported
+* Version: 2.0.1 (last version supporting Python 3.6)
 
 pyrsistent
 ----------
 
 * Homepage: http://github.com/tobgu/pyrsistent/
 * Usage: Needed by `jsonschema`
-* Version: 0.16.1 (last version supporting Python 2.7)
-* Note: We only include the parts needed for `jsonschema`.
-
-pytest
-------
-
-* Homepage: https://pypi.python.org/pypi/pytest
-* Usage: Testing framework used by Spack.
-* Version: 3.2.5 (last version supporting Python 2.6)
-* Note: This package has been slightly modified:
-  * We improve Python 2.6 compatibility. See:
-    https://github.com/spack/spack/pull/6801.
-  * We have patched pytest not to depend on setuptools. See:
-    https://github.com/spack/spack/pull/15612
+* Version: 0.18.0
 
 ruamel.yaml
 ------

lib/spack/external/_vendoring/_pyrsistent_version.py

@@ -0,0 +1 @@
+__version__ = '0.18.0'

lib/spack/external/_vendoring/_pyrsistent_version.pyi

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

lib/spack/external/_vendoring/altgraph.pyi

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

lib/spack/external/_vendoring/altgraph/LICENSE

@@ -0,0 +1,18 @@
+Copyright (c) 2004 Istvan Albert unless otherwise noted.
+Copyright (c) 2006-2010 Bob Ippolito
+Copyright (2) 2010-2020 Ronald Oussoren, et. al.
+
+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.
+
+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.

lib/spack/external/_vendoring/attr/__init__.py

@@ -1,4 +1,5 @@
-from __future__ import absolute_import, division, print_function
+# SPDX-License-Identifier: MIT
+
 
 import sys
 
@@ -22,7 +23,7 @@
 from ._version_info import VersionInfo
 
 
-__version__ = "21.2.0"
+__version__ = "22.1.0"
 __version_info__ = VersionInfo._from_version_string(__version__)
 
 __title__ = "attrs"
@@ -73,6 +74,6 @@
 ]
 
 if sys.version_info[:2] >= (3, 6):
-    from ._next_gen import define, field, frozen, mutable
+    from ._next_gen import define, field, frozen, mutable  # noqa: F401
 
-    __all__.extend((define, field, frozen, mutable))
+    __all__.extend(("define", "field", "frozen", "mutable"))

lib/spack/external/_vendoring/attr/__init__.pyi

@@ -0,0 +1,486 @@
+import sys
+
+from typing import (
+    Any,
+    Callable,
+    ClassVar,
+    Dict,
+    Generic,
+    List,
+    Mapping,
+    Optional,
+    Protocol,
+    Sequence,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+    overload,
+)
+
+# `import X as X` is required to make these public
+from . import converters as converters
+from . import exceptions as exceptions
+from . import filters as filters
+from . import setters as setters
+from . import validators as validators
+from ._cmp import cmp_using as cmp_using
+from ._version_info import VersionInfo
+
+__version__: str
+__version_info__: VersionInfo
+__title__: str
+__description__: str
+__url__: str
+__uri__: str
+__author__: str
+__email__: str
+__license__: str
+__copyright__: str
+
+_T = TypeVar("_T")
+_C = TypeVar("_C", bound=type)
+
+_EqOrderType = Union[bool, Callable[[Any], Any]]
+_ValidatorType = Callable[[Any, Attribute[_T], _T], Any]
+_ConverterType = Callable[[Any], Any]
+_FilterType = Callable[[Attribute[_T], _T], bool]
+_ReprType = Callable[[Any], str]
+_ReprArgType = Union[bool, _ReprType]
+_OnSetAttrType = Callable[[Any, Attribute[Any], Any], Any]
+_OnSetAttrArgType = Union[
+    _OnSetAttrType, List[_OnSetAttrType], setters._NoOpType
+]
+_FieldTransformer = Callable[
+    [type, List[Attribute[Any]]], List[Attribute[Any]]
+]
+# FIXME: in reality, if multiple validators are passed they must be in a list
+# or tuple, but those are invariant and so would prevent subtypes of
+# _ValidatorType from working when passed in a list or tuple.
+_ValidatorArgType = Union[_ValidatorType[_T], Sequence[_ValidatorType[_T]]]
+
+# A protocol to be able to statically accept an attrs class.
+class AttrsInstance(Protocol):
+    __attrs_attrs__: ClassVar[Any]
+
+# _make --
+
+NOTHING: object
+
+# NOTE: Factory lies about its return type to make this possible:
+# `x: List[int] # = Factory(list)`
+# Work around mypy issue #4554 in the common case by using an overload.
+if sys.version_info >= (3, 8):
+    from typing import Literal
+    @overload
+    def Factory(factory: Callable[[], _T]) -> _T: ...
+    @overload
+    def Factory(
+        factory: Callable[[Any], _T],
+        takes_self: Literal[True],
+    ) -> _T: ...
+    @overload
+    def Factory(
+        factory: Callable[[], _T],
+        takes_self: Literal[False],
+    ) -> _T: ...
+
+else:
+    @overload
+    def Factory(factory: Callable[[], _T]) -> _T: ...
+    @overload
+    def Factory(
+        factory: Union[Callable[[Any], _T], Callable[[], _T]],
+        takes_self: bool = ...,
+    ) -> _T: ...
+
+# Static type inference support via __dataclass_transform__ implemented as per:
+# https://github.com/microsoft/pyright/blob/1.1.135/specs/dataclass_transforms.md
+# This annotation must be applied to all overloads of "define" and "attrs"
+#
+# NOTE: This is a typing construct and does not exist at runtime.  Extensions
+# wrapping attrs decorators should declare a separate __dataclass_transform__
+# signature in the extension module using the specification linked above to
+# provide pyright support.
+def __dataclass_transform__(
+    *,
+    eq_default: bool = True,
+    order_default: bool = False,
+    kw_only_default: bool = False,
+    field_descriptors: Tuple[Union[type, Callable[..., Any]], ...] = (()),
+) -> Callable[[_T], _T]: ...
+
+class Attribute(Generic[_T]):
+    name: str
+    default: Optional[_T]
+    validator: Optional[_ValidatorType[_T]]
+    repr: _ReprArgType
+    cmp: _EqOrderType
+    eq: _EqOrderType
+    order: _EqOrderType
+    hash: Optional[bool]
+    init: bool
+    converter: Optional[_ConverterType]
+    metadata: Dict[Any, Any]
+    type: Optional[Type[_T]]
+    kw_only: bool
+    on_setattr: _OnSetAttrType
+    def evolve(self, **changes: Any) -> "Attribute[Any]": ...
+
+# NOTE: We had several choices for the annotation to use for type arg:
+# 1) Type[_T]
+#   - Pros: Handles simple cases correctly
+#   - Cons: Might produce less informative errors in the case of conflicting
+#     TypeVars e.g. `attr.ib(default='bad', type=int)`
+# 2) Callable[..., _T]
+#   - Pros: Better error messages than #1 for conflicting TypeVars
+#   - Cons: Terrible error messages for validator checks.
+#   e.g. attr.ib(type=int, validator=validate_str)
+#        -> error: Cannot infer function type argument
+# 3) type (and do all of the work in the mypy plugin)
+#   - Pros: Simple here, and we could customize the plugin with our own errors.
+#   - Cons: Would need to write mypy plugin code to handle all the cases.
+# We chose option #1.
+
+# `attr` lies about its return type to make the following possible:
+#     attr()    -> Any
+#     attr(8)   -> int
+#     attr(validator=<some callable>)  -> Whatever the callable expects.
+# This makes this type of assignments possible:
+#     x: int = attr(8)
+#
+# This form catches explicit None or no default but with no other arguments
+# returns Any.
+@overload
+def attrib(
+    default: None = ...,
+    validator: None = ...,
+    repr: _ReprArgType = ...,
+    cmp: Optional[_EqOrderType] = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    metadata: Optional[Mapping[Any, Any]] = ...,
+    type: None = ...,
+    converter: None = ...,
+    factory: None = ...,
+    kw_only: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+) -> Any: ...
+
+# This form catches an explicit None or no default and infers the type from the
+# other arguments.
+@overload
+def attrib(
+    default: None = ...,
+    validator: Optional[_ValidatorArgType[_T]] = ...,
+    repr: _ReprArgType = ...,
+    cmp: Optional[_EqOrderType] = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    metadata: Optional[Mapping[Any, Any]] = ...,
+    type: Optional[Type[_T]] = ...,
+    converter: Optional[_ConverterType] = ...,
+    factory: Optional[Callable[[], _T]] = ...,
+    kw_only: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+) -> _T: ...
+
+# This form catches an explicit default argument.
+@overload
+def attrib(
+    default: _T,
+    validator: Optional[_ValidatorArgType[_T]] = ...,
+    repr: _ReprArgType = ...,
+    cmp: Optional[_EqOrderType] = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    metadata: Optional[Mapping[Any, Any]] = ...,
+    type: Optional[Type[_T]] = ...,
+    converter: Optional[_ConverterType] = ...,
+    factory: Optional[Callable[[], _T]] = ...,
+    kw_only: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+) -> _T: ...
+
+# This form covers type=non-Type: e.g. forward references (str), Any
+@overload
+def attrib(
+    default: Optional[_T] = ...,
+    validator: Optional[_ValidatorArgType[_T]] = ...,
+    repr: _ReprArgType = ...,
+    cmp: Optional[_EqOrderType] = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    metadata: Optional[Mapping[Any, Any]] = ...,
+    type: object = ...,
+    converter: Optional[_ConverterType] = ...,
+    factory: Optional[Callable[[], _T]] = ...,
+    kw_only: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+) -> Any: ...
+@overload
+def field(
+    *,
+    default: None = ...,
+    validator: None = ...,
+    repr: _ReprArgType = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    metadata: Optional[Mapping[Any, Any]] = ...,
+    converter: None = ...,
+    factory: None = ...,
+    kw_only: bool = ...,
+    eq: Optional[bool] = ...,
+    order: Optional[bool] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+) -> Any: ...
+
+# This form catches an explicit None or no default and infers the type from the
+# other arguments.
+@overload
+def field(
+    *,
+    default: None = ...,
+    validator: Optional[_ValidatorArgType[_T]] = ...,
+    repr: _ReprArgType = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    metadata: Optional[Mapping[Any, Any]] = ...,
+    converter: Optional[_ConverterType] = ...,
+    factory: Optional[Callable[[], _T]] = ...,
+    kw_only: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+) -> _T: ...
+
+# This form catches an explicit default argument.
+@overload
+def field(
+    *,
+    default: _T,
+    validator: Optional[_ValidatorArgType[_T]] = ...,
+    repr: _ReprArgType = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    metadata: Optional[Mapping[Any, Any]] = ...,
+    converter: Optional[_ConverterType] = ...,
+    factory: Optional[Callable[[], _T]] = ...,
+    kw_only: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+) -> _T: ...
+
+# This form covers type=non-Type: e.g. forward references (str), Any
+@overload
+def field(
+    *,
+    default: Optional[_T] = ...,
+    validator: Optional[_ValidatorArgType[_T]] = ...,
+    repr: _ReprArgType = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    metadata: Optional[Mapping[Any, Any]] = ...,
+    converter: Optional[_ConverterType] = ...,
+    factory: Optional[Callable[[], _T]] = ...,
+    kw_only: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+) -> Any: ...
+@overload
+@__dataclass_transform__(order_default=True, field_descriptors=(attrib, field))
+def attrs(
+    maybe_cls: _C,
+    these: Optional[Dict[str, Any]] = ...,
+    repr_ns: Optional[str] = ...,
+    repr: bool = ...,
+    cmp: Optional[_EqOrderType] = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    slots: bool = ...,
+    frozen: bool = ...,
+    weakref_slot: bool = ...,
+    str: bool = ...,
+    auto_attribs: bool = ...,
+    kw_only: bool = ...,
+    cache_hash: bool = ...,
+    auto_exc: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    auto_detect: bool = ...,
+    collect_by_mro: bool = ...,
+    getstate_setstate: Optional[bool] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+    field_transformer: Optional[_FieldTransformer] = ...,
+    match_args: bool = ...,
+) -> _C: ...
+@overload
+@__dataclass_transform__(order_default=True, field_descriptors=(attrib, field))
+def attrs(
+    maybe_cls: None = ...,
+    these: Optional[Dict[str, Any]] = ...,
+    repr_ns: Optional[str] = ...,
+    repr: bool = ...,
+    cmp: Optional[_EqOrderType] = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    slots: bool = ...,
+    frozen: bool = ...,
+    weakref_slot: bool = ...,
+    str: bool = ...,
+    auto_attribs: bool = ...,
+    kw_only: bool = ...,
+    cache_hash: bool = ...,
+    auto_exc: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    auto_detect: bool = ...,
+    collect_by_mro: bool = ...,
+    getstate_setstate: Optional[bool] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+    field_transformer: Optional[_FieldTransformer] = ...,
+    match_args: bool = ...,
+) -> Callable[[_C], _C]: ...
+@overload
+@__dataclass_transform__(field_descriptors=(attrib, field))
+def define(
+    maybe_cls: _C,
+    *,
+    these: Optional[Dict[str, Any]] = ...,
+    repr: bool = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    slots: bool = ...,
+    frozen: bool = ...,
+    weakref_slot: bool = ...,
+    str: bool = ...,
+    auto_attribs: bool = ...,
+    kw_only: bool = ...,
+    cache_hash: bool = ...,
+    auto_exc: bool = ...,
+    eq: Optional[bool] = ...,
+    order: Optional[bool] = ...,
+    auto_detect: bool = ...,
+    getstate_setstate: Optional[bool] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+    field_transformer: Optional[_FieldTransformer] = ...,
+    match_args: bool = ...,
+) -> _C: ...
+@overload
+@__dataclass_transform__(field_descriptors=(attrib, field))
+def define(
+    maybe_cls: None = ...,
+    *,
+    these: Optional[Dict[str, Any]] = ...,
+    repr: bool = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    slots: bool = ...,
+    frozen: bool = ...,
+    weakref_slot: bool = ...,
+    str: bool = ...,
+    auto_attribs: bool = ...,
+    kw_only: bool = ...,
+    cache_hash: bool = ...,
+    auto_exc: bool = ...,
+    eq: Optional[bool] = ...,
+    order: Optional[bool] = ...,
+    auto_detect: bool = ...,
+    getstate_setstate: Optional[bool] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+    field_transformer: Optional[_FieldTransformer] = ...,
+    match_args: bool = ...,
+) -> Callable[[_C], _C]: ...
+
+mutable = define
+frozen = define  # they differ only in their defaults
+
+def fields(cls: Type[AttrsInstance]) -> Any: ...
+def fields_dict(cls: Type[AttrsInstance]) -> Dict[str, Attribute[Any]]: ...
+def validate(inst: AttrsInstance) -> None: ...
+def resolve_types(
+    cls: _C,
+    globalns: Optional[Dict[str, Any]] = ...,
+    localns: Optional[Dict[str, Any]] = ...,
+    attribs: Optional[List[Attribute[Any]]] = ...,
+) -> _C: ...
+
+# TODO: add support for returning a proper attrs class from the mypy plugin
+# we use Any instead of _CountingAttr so that e.g. `make_class('Foo',
+# [attr.ib()])` is valid
+def make_class(
+    name: str,
+    attrs: Union[List[str], Tuple[str, ...], Dict[str, Any]],
+    bases: Tuple[type, ...] = ...,
+    repr_ns: Optional[str] = ...,
+    repr: bool = ...,
+    cmp: Optional[_EqOrderType] = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    slots: bool = ...,
+    frozen: bool = ...,
+    weakref_slot: bool = ...,
+    str: bool = ...,
+    auto_attribs: bool = ...,
+    kw_only: bool = ...,
+    cache_hash: bool = ...,
+    auto_exc: bool = ...,
+    eq: Optional[_EqOrderType] = ...,
+    order: Optional[_EqOrderType] = ...,
+    collect_by_mro: bool = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+    field_transformer: Optional[_FieldTransformer] = ...,
+) -> type: ...
+
+# _funcs --
+
+# TODO: add support for returning TypedDict from the mypy plugin
+# FIXME: asdict/astuple do not honor their factory args. Waiting on one of
+# these:
+# https://github.com/python/mypy/issues/4236
+# https://github.com/python/typing/issues/253
+# XXX: remember to fix attrs.asdict/astuple too!
+def asdict(
+    inst: AttrsInstance,
+    recurse: bool = ...,
+    filter: Optional[_FilterType[Any]] = ...,
+    dict_factory: Type[Mapping[Any, Any]] = ...,
+    retain_collection_types: bool = ...,
+    value_serializer: Optional[
+        Callable[[type, Attribute[Any], Any], Any]
+    ] = ...,
+    tuple_keys: Optional[bool] = ...,
+) -> Dict[str, Any]: ...
+
+# TODO: add support for returning NamedTuple from the mypy plugin
+def astuple(
+    inst: AttrsInstance,
+    recurse: bool = ...,
+    filter: Optional[_FilterType[Any]] = ...,
+    tuple_factory: Type[Sequence[Any]] = ...,
+    retain_collection_types: bool = ...,
+) -> Tuple[Any, ...]: ...
+def has(cls: type) -> bool: ...
+def assoc(inst: _T, **changes: Any) -> _T: ...
+def evolve(inst: _T, **changes: Any) -> _T: ...
+
+# _config --
+
+def set_run_validators(run: bool) -> None: ...
+def get_run_validators() -> bool: ...
+
+# aliases --
+
+s = attributes = attrs
+ib = attr = attrib
+dataclass = attrs  # Technically, partial(attrs, auto_attribs=True) ;)

lib/spack/external/_vendoring/attr/_cmp.py

@@ -1,8 +1,9 @@
-from __future__ import absolute_import, division, print_function
+# SPDX-License-Identifier: MIT
+
 
 import functools
+import types
 
-from ._compat import new_class
 from ._make import _make_ne
 
 
@@ -78,7 +79,9 @@ def cmp_using(
         num_order_functions += 1
         body["__ge__"] = _make_operator("ge", ge)
 
-    type_ = new_class(class_name, (object,), {}, lambda ns: ns.update(body))
+    type_ = types.new_class(
+        class_name, (object,), {}, lambda ns: ns.update(body)
+    )
 
     # Add same type requirement.
     if require_same_type:

lib/spack/external/_vendoring/attr/_cmp.pyi

@@ -0,0 +1,13 @@
+from typing import Any, Callable, Optional, Type
+
+_CompareWithType = Callable[[Any, Any], bool]
+
+def cmp_using(
+    eq: Optional[_CompareWithType],
+    lt: Optional[_CompareWithType],
+    le: Optional[_CompareWithType],
+    gt: Optional[_CompareWithType],
+    ge: Optional[_CompareWithType],
+    require_same_type: bool,
+    class_name: str,
+) -> Type: ...

lib/spack/external/_vendoring/attr/_compat.py

@@ -0,0 +1,185 @@
+# SPDX-License-Identifier: MIT
+
+
+import inspect
+import platform
+import sys
+import threading
+import types
+import warnings
+
+from collections.abc import Mapping, Sequence  # noqa
+
+
+PYPY = platform.python_implementation() == "PyPy"
+PY36 = sys.version_info[:2] >= (3, 6)
+HAS_F_STRINGS = PY36
+PY310 = sys.version_info[:2] >= (3, 10)
+
+
+if PYPY or PY36:
+    ordered_dict = dict
+else:
+    from collections import OrderedDict
+
+    ordered_dict = OrderedDict
+
+
+def just_warn(*args, **kw):
+    warnings.warn(
+        "Running interpreter doesn't sufficiently support code object "
+        "introspection.  Some features like bare super() or accessing "
+        "__class__ will not work with slotted classes.",
+        RuntimeWarning,
+        stacklevel=2,
+    )
+
+
+class _AnnotationExtractor:
+    """
+    Extract type annotations from a callable, returning None whenever there
+    is none.
+    """
+
+    __slots__ = ["sig"]
+
+    def __init__(self, callable):
+        try:
+            self.sig = inspect.signature(callable)
+        except (ValueError, TypeError):  # inspect failed
+            self.sig = None
+
+    def get_first_param_type(self):
+        """
+        Return the type annotation of the first argument if it's not empty.
+        """
+        if not self.sig:
+            return None
+
+        params = list(self.sig.parameters.values())
+        if params and params[0].annotation is not inspect.Parameter.empty:
+            return params[0].annotation
+
+        return None
+
+    def get_return_type(self):
+        """
+        Return the return type if it's not empty.
+        """
+        if (
+            self.sig
+            and self.sig.return_annotation is not inspect.Signature.empty
+        ):
+            return self.sig.return_annotation
+
+        return None
+
+
+def make_set_closure_cell():
+    """Return a function of two arguments (cell, value) which sets
+    the value stored in the closure cell `cell` to `value`.
+    """
+    # pypy makes this easy. (It also supports the logic below, but
+    # why not do the easy/fast thing?)
+    if PYPY:
+
+        def set_closure_cell(cell, value):
+            cell.__setstate__((value,))
+
+        return set_closure_cell
+
+    # Otherwise gotta do it the hard way.
+
+    # Create a function that will set its first cellvar to `value`.
+    def set_first_cellvar_to(value):
+        x = value
+        return
+
+        # This function will be eliminated as dead code, but
+        # not before its reference to `x` forces `x` to be
+        # represented as a closure cell rather than a local.
+        def force_x_to_be_a_cell():  # pragma: no cover
+            return x
+
+    try:
+        # Extract the code object and make sure our assumptions about
+        # the closure behavior are correct.
+        co = set_first_cellvar_to.__code__
+        if co.co_cellvars != ("x",) or co.co_freevars != ():
+            raise AssertionError  # pragma: no cover
+
+        # Convert this code object to a code object that sets the
+        # function's first _freevar_ (not cellvar) to the argument.
+        if sys.version_info >= (3, 8):
+
+            def set_closure_cell(cell, value):
+                cell.cell_contents = value
+
+        else:
+            args = [co.co_argcount]
+            args.append(co.co_kwonlyargcount)
+            args.extend(
+                [
+                    co.co_nlocals,
+                    co.co_stacksize,
+                    co.co_flags,
+                    co.co_code,
+                    co.co_consts,
+                    co.co_names,
+                    co.co_varnames,
+                    co.co_filename,
+                    co.co_name,
+                    co.co_firstlineno,
+                    co.co_lnotab,
+                    # These two arguments are reversed:
+                    co.co_cellvars,
+                    co.co_freevars,
+                ]
+            )
+            set_first_freevar_code = types.CodeType(*args)
+
+            def set_closure_cell(cell, value):
+                # Create a function using the set_first_freevar_code,
+                # whose first closure cell is `cell`. Calling it will
+                # change the value of that cell.
+                setter = types.FunctionType(
+                    set_first_freevar_code, {}, "setter", (), (cell,)
+                )
+                # And call it to set the cell.
+                setter(value)
+
+        # Make sure it works on this interpreter:
+        def make_func_with_cell():
+            x = None
+
+            def func():
+                return x  # pragma: no cover
+
+            return func
+
+        cell = make_func_with_cell().__closure__[0]
+        set_closure_cell(cell, 100)
+        if cell.cell_contents != 100:
+            raise AssertionError  # pragma: no cover
+
+    except Exception:
+        return just_warn
+    else:
+        return set_closure_cell
+
+
+set_closure_cell = make_set_closure_cell()
+
+# Thread-local global to track attrs instances which are already being repr'd.
+# This is needed because there is no other (thread-safe) way to pass info
+# about the instances that are already being repr'd through the call stack
+# in order to ensure we don't perform infinite recursion.
+#
+# For instance, if an instance contains a dict which contains that instance,
+# we need to know that we're already repr'ing the outside instance from within
+# the dict's repr() call.
+#
+# This lives here rather than in _make.py so that the functions in _make.py
+# don't have a direct reference to the thread-local in their globals dict.
+# If they have such a reference, it breaks cloudpickle.
+repr_context = threading.local()

lib/spack/external/_vendoring/attr/_config.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import, division, print_function
+# SPDX-License-Identifier: MIT
 
 
 __all__ = ["set_run_validators", "get_run_validators"]
@@ -9,6 +9,10 @@
 def set_run_validators(run):
     """
     Set whether or not validators are run.  By default, they are run.
+
+    .. deprecated:: 21.3.0 It will not be removed, but it also will not be
+        moved to new ``attrs`` namespace. Use `attrs.validators.set_disabled()`
+        instead.
     """
     if not isinstance(run, bool):
         raise TypeError("'run' must be bool.")
@@ -19,5 +23,9 @@ def set_run_validators(run):
 def get_run_validators():
     """
     Return whether or not validators are run.
+
+    .. deprecated:: 21.3.0 It will not be removed, but it also will not be
+        moved to new ``attrs`` namespace. Use `attrs.validators.get_disabled()`
+        instead.
     """
     return _run_validators

lib/spack/external/_vendoring/attr/_funcs.py

@@ -1,8 +1,8 @@
-from __future__ import absolute_import, division, print_function
+# SPDX-License-Identifier: MIT
+
 
 import copy
 
-from ._compat import iteritems
 from ._make import NOTHING, _obj_setattr, fields
 from .exceptions import AttrsAttributeNotFoundError
 
@@ -25,7 +25,7 @@ def asdict(
         ``attrs``-decorated.
     :param callable filter: A callable whose return code determines whether an
         attribute or element is included (``True``) or dropped (``False``).  Is
-        called with the `attr.Attribute` as the first argument and the
+        called with the `attrs.Attribute` as the first argument and the
         value as the second argument.
     :param callable dict_factory: A callable to produce dictionaries from.  For
         example, to produce ordered dictionaries instead of normal Python
@@ -46,6 +46,8 @@ def asdict(
     ..  versionadded:: 16.0.0 *dict_factory*
     ..  versionadded:: 16.1.0 *retain_collection_types*
     ..  versionadded:: 20.3.0 *value_serializer*
+    ..  versionadded:: 21.3.0 If a dict has a collection for a key, it is
+        serialized as a tuple.
     """
     attrs = fields(inst.__class__)
     rv = dict_factory()
@@ -61,11 +63,11 @@ def asdict(
             if has(v.__class__):
                 rv[a.name] = asdict(
                     v,
-                    True,
-                    filter,
-                    dict_factory,
-                    retain_collection_types,
-                    value_serializer,
+                    recurse=True,
+                    filter=filter,
+                    dict_factory=dict_factory,
+                    retain_collection_types=retain_collection_types,
+                    value_serializer=value_serializer,
                 )
             elif isinstance(v, (tuple, list, set, frozenset)):
                 cf = v.__class__ if retain_collection_types is True else list
@@ -73,10 +75,11 @@ def asdict(
                     [
                         _asdict_anything(
                             i,
-                            filter,
-                            dict_factory,
-                            retain_collection_types,
-                            value_serializer,
+                            is_key=False,
+                            filter=filter,
+                            dict_factory=dict_factory,
+                            retain_collection_types=retain_collection_types,
+                            value_serializer=value_serializer,
                         )
                         for i in v
                     ]
@@ -87,20 +90,22 @@ def asdict(
                     (
                         _asdict_anything(
                             kk,
-                            filter,
-                            df,
-                            retain_collection_types,
-                            value_serializer,
+                            is_key=True,
+                            filter=filter,
+                            dict_factory=df,
+                            retain_collection_types=retain_collection_types,
+                            value_serializer=value_serializer,
                         ),
                         _asdict_anything(
                             vv,
-                            filter,
-                            df,
-                            retain_collection_types,
-                            value_serializer,
+                            is_key=False,
+                            filter=filter,
+                            dict_factory=df,
+                            retain_collection_types=retain_collection_types,
+                            value_serializer=value_serializer,
                         ),
                     )
-                    for kk, vv in iteritems(v)
+                    for kk, vv in v.items()
                 )
             else:
                 rv[a.name] = v
@@ -111,6 +116,7 @@ def asdict(
 
 def _asdict_anything(
     val,
+    is_key,
     filter,
     dict_factory,
     retain_collection_types,
@@ -123,22 +129,29 @@ def _asdict_anything(
         # Attrs class.
         rv = asdict(
             val,
-            True,
-            filter,
-            dict_factory,
-            retain_collection_types,
-            value_serializer,
+            recurse=True,
+            filter=filter,
+            dict_factory=dict_factory,
+            retain_collection_types=retain_collection_types,
+            value_serializer=value_serializer,
         )
     elif isinstance(val, (tuple, list, set, frozenset)):
-        cf = val.__class__ if retain_collection_types is True else list
+        if retain_collection_types is True:
+            cf = val.__class__
+        elif is_key:
+            cf = tuple
+        else:
+            cf = list
+
         rv = cf(
             [
                 _asdict_anything(
                     i,
-                    filter,
-                    dict_factory,
-                    retain_collection_types,
-                    value_serializer,
+                    is_key=False,
+                    filter=filter,
+                    dict_factory=dict_factory,
+                    retain_collection_types=retain_collection_types,
+                    value_serializer=value_serializer,
                 )
                 for i in val
             ]
@@ -148,13 +161,23 @@ def _asdict_anything(
         rv = df(
             (
                 _asdict_anything(
-                    kk, filter, df, retain_collection_types, value_serializer
+                    kk,
+                    is_key=True,
+                    filter=filter,
+                    dict_factory=df,
+                    retain_collection_types=retain_collection_types,
+                    value_serializer=value_serializer,
                 ),
                 _asdict_anything(
-                    vv, filter, df, retain_collection_types, value_serializer
+                    vv,
+                    is_key=False,
+                    filter=filter,
+                    dict_factory=df,
+                    retain_collection_types=retain_collection_types,
+                    value_serializer=value_serializer,
                 ),
             )
-            for kk, vv in iteritems(val)
+            for kk, vv in val.items()
         )
     else:
         rv = val
@@ -181,7 +204,7 @@ def astuple(
         ``attrs``-decorated.
     :param callable filter: A callable whose return code determines whether an
         attribute or element is included (``True``) or dropped (``False``).  Is
-        called with the `attr.Attribute` as the first argument and the
+        called with the `attrs.Attribute` as the first argument and the
         value as the second argument.
     :param callable tuple_factory: A callable to produce tuples from.  For
         example, to produce lists instead of tuples.
@@ -253,7 +276,7 @@ def astuple(
                             if has(vv.__class__)
                             else vv,
                         )
-                        for kk, vv in iteritems(v)
+                        for kk, vv in v.items()
                     )
                 )
             else:
@@ -291,7 +314,9 @@ def assoc(inst, **changes):
         class.
 
     ..  deprecated:: 17.1.0
-        Use `evolve` instead.
+        Use `attrs.evolve` instead if you can.
+        This function will not be removed du to the slightly different approach
+        compared to `attrs.evolve`.
     """
     import warnings
 
@@ -302,7 +327,7 @@ def assoc(inst, **changes):
     )
     new = copy.copy(inst)
     attrs = fields(inst.__class__)
-    for k, v in iteritems(changes):
+    for k, v in changes.items():
         a = getattr(attrs, k, NOTHING)
         if a is NOTHING:
             raise AttrsAttributeNotFoundError(
@@ -370,18 +395,16 @@ class and you didn't pass any attribs.
     :raise NameError: If types cannot be resolved because of missing variables.
 
     :returns: *cls* so you can use this function also as a class decorator.
-        Please note that you have to apply it **after** `attr.s`. That means
-        the decorator has to come in the line **before** `attr.s`.
+        Please note that you have to apply it **after** `attrs.define`. That
+        means the decorator has to come in the line **before** `attrs.define`.
 
     ..  versionadded:: 20.1.0
     ..  versionadded:: 21.1.0 *attribs*
 
     """
-    try:
-        # Since calling get_type_hints is expensive we cache whether we've
-        # done it already.
-        cls.__attrs_types_resolved__
-    except AttributeError:
+    # Since calling get_type_hints is expensive we cache whether we've
+    # done it already.
+    if getattr(cls, "__attrs_types_resolved__", None) != cls:
         import typing
 
         hints = typing.get_type_hints(cls, globalns=globalns, localns=localns)
@@ -389,7 +412,9 @@ class and you didn't pass any attribs.
             if field.name in hints:
                 # Since fields have been frozen we must work around it.
                 _obj_setattr(field, "type", hints[field.name])
-        cls.__attrs_types_resolved__ = True
+        # We store the class we resolved so that subclasses know they haven't
+        # been resolved.
+        cls.__attrs_types_resolved__ = cls
 
     # Return the class so you can use it as a decorator too.
     return cls

lib/spack/external/_vendoring/attr/_next_gen.py

@@ -1,14 +1,24 @@
+# SPDX-License-Identifier: MIT
+
 """
 These are Python 3.6+-only and keyword-only APIs that call `attr.s` and
 `attr.ib` with different default values.
 """
 
+
 from functools import partial
 
-from attr.exceptions import UnannotatedAttributeError
-
 from . import setters
-from ._make import NOTHING, _frozen_setattrs, attrib, attrs
+from ._funcs import asdict as _asdict
+from ._funcs import astuple as _astuple
+from ._make import (
+    NOTHING,
+    _frozen_setattrs,
+    _ng_default_on_setattr,
+    attrib,
+    attrs,
+)
+from .exceptions import UnannotatedAttributeError
 
 
 def define(
@@ -32,22 +42,45 @@ def define(
     getstate_setstate=None,
     on_setattr=None,
     field_transformer=None,
+    match_args=True,
 ):
     r"""
-    The only behavioral differences are the handling of the *auto_attribs*
-    option:
+    Define an ``attrs`` class.
+
+    Differences to the classic `attr.s` that it uses underneath:
+
+    - Automatically detect whether or not *auto_attribs* should be `True` (c.f.
+      *auto_attribs* parameter).
+    - If *frozen* is `False`, run converters and validators when setting an
+      attribute by default.
+    - *slots=True*
+
+      .. caution::
+
+         Usually this has only upsides and few visible effects in everyday
+         programming. But it *can* lead to some suprising behaviors, so please
+         make sure to read :term:`slotted classes`.
+    - *auto_exc=True*
+    - *auto_detect=True*
+    - *order=False*
+    - Some options that were only relevant on Python 2 or were kept around for
+      backwards-compatibility have been removed.
+
+    Please note that these are all defaults and you can change them as you
+    wish.
 
     :param Optional[bool] auto_attribs: If set to `True` or `False`, it behaves
        exactly like `attr.s`. If left `None`, `attr.s` will try to guess:
 
-       1. If any attributes are annotated and no unannotated `attr.ib`\ s
+       1. If any attributes are annotated and no unannotated `attrs.fields`\ s
           are found, it assumes *auto_attribs=True*.
        2. Otherwise it assumes *auto_attribs=False* and tries to collect
-          `attr.ib`\ s.
+          `attrs.fields`\ s.
 
-    and that mutable classes (``frozen=False``) validate on ``__setattr__``.
+    For now, please refer to `attr.s` for the rest of the parameters.
 
     .. versionadded:: 20.1.0
+    .. versionchanged:: 21.3.0 Converters are also run ``on_setattr``.
     """
 
     def do_it(cls, auto_attribs):
@@ -72,6 +105,7 @@ def do_it(cls, auto_attribs):
             getstate_setstate=getstate_setstate,
             on_setattr=on_setattr,
             field_transformer=field_transformer,
+            match_args=match_args,
         )
 
     def wrap(cls):
@@ -84,9 +118,9 @@ def wrap(cls):
 
         had_on_setattr = on_setattr not in (None, setters.NO_OP)
 
-        # By default, mutable classes validate on setattr.
+        # By default, mutable classes convert & validate on setattr.
         if frozen is False and on_setattr is None:
-            on_setattr = setters.validate
+            on_setattr = _ng_default_on_setattr
 
         # However, if we subclass a frozen class, we inherit the immutability
         # and disable on_setattr.
@@ -156,3 +190,31 @@ def field(
         order=order,
         on_setattr=on_setattr,
     )
+
+
+def asdict(inst, *, recurse=True, filter=None, value_serializer=None):
+    """
+    Same as `attr.asdict`, except that collections types are always retained
+    and dict is always used as *dict_factory*.
+
+    .. versionadded:: 21.3.0
+    """
+    return _asdict(
+        inst=inst,
+        recurse=recurse,
+        filter=filter,
+        value_serializer=value_serializer,
+        retain_collection_types=True,
+    )
+
+
+def astuple(inst, *, recurse=True, filter=None):
+    """
+    Same as `attr.astuple`, except that collections types are always retained
+    and `tuple` is always used as the *tuple_factory*.
+
+    .. versionadded:: 21.3.0
+    """
+    return _astuple(
+        inst=inst, recurse=recurse, filter=filter, retain_collection_types=True
+    )

lib/spack/external/_vendoring/attr/_version_info.py

@@ -1,4 +1,5 @@
-from __future__ import absolute_import, division, print_function
+# SPDX-License-Identifier: MIT
+
 
 from functools import total_ordering
 
@@ -8,7 +9,7 @@
 
 @total_ordering
 @attrs(eq=False, order=False, slots=True, frozen=True)
-class VersionInfo(object):
+class VersionInfo:
     """
     A version object that can be compared to tuple of length 1--4:
 

lib/spack/external/_vendoring/attr/_version_info.pyi

@@ -0,0 +1,9 @@
+class VersionInfo:
+    @property
+    def year(self) -> int: ...
+    @property
+    def minor(self) -> int: ...
+    @property
+    def micro(self) -> int: ...
+    @property
+    def releaselevel(self) -> str: ...

lib/spack/external/_vendoring/attr/converters.py

@@ -1,22 +1,21 @@
+# SPDX-License-Identifier: MIT
+
 """
 Commonly useful converters.
 """
 
-from __future__ import absolute_import, division, print_function
 
-from ._compat import PY2
+import typing
+
+from ._compat import _AnnotationExtractor
 from ._make import NOTHING, Factory, pipe
 
 
-if not PY2:
-    import inspect
-    import typing
-
-
 __all__ = [
-    "pipe",
-    "optional",
     "default_if_none",
+    "optional",
+    "pipe",
+    "to_bool",
 ]
 
 
@@ -39,22 +38,15 @@ def optional_converter(val):
             return None
         return converter(val)
 
-    if not PY2:
-        sig = None
-        try:
-            sig = inspect.signature(converter)
-        except (ValueError, TypeError):  # inspect failed
-            pass
-        if sig:
-            params = list(sig.parameters.values())
-            if params and params[0].annotation is not inspect.Parameter.empty:
-                optional_converter.__annotations__["val"] = typing.Optional[
-                    params[0].annotation
-                ]
-            if sig.return_annotation is not inspect.Signature.empty:
-                optional_converter.__annotations__["return"] = typing.Optional[
-                    sig.return_annotation
-                ]
+    xtr = _AnnotationExtractor(converter)
+
+    t = xtr.get_first_param_type()
+    if t:
+        optional_converter.__annotations__["val"] = typing.Optional[t]
+
+    rt = xtr.get_return_type()
+    if rt:
+        optional_converter.__annotations__["return"] = typing.Optional[rt]
 
     return optional_converter
 
@@ -65,14 +57,14 @@ def default_if_none(default=NOTHING, factory=None):
     result of *factory*.
 
     :param default: Value to be used if ``None`` is passed. Passing an instance
-       of `attr.Factory` is supported, however the ``takes_self`` option
+       of `attrs.Factory` is supported, however the ``takes_self`` option
        is *not*.
     :param callable factory: A callable that takes no parameters whose result
        is used if ``None`` is passed.
 
     :raises TypeError: If **neither** *default* or *factory* is passed.
     :raises TypeError: If **both** *default* and *factory* are passed.
-    :raises ValueError: If an instance of `attr.Factory` is passed with
+    :raises ValueError: If an instance of `attrs.Factory` is passed with
        ``takes_self=True``.
 
     .. versionadded:: 18.2.0
@@ -109,3 +101,44 @@ def default_if_none_converter(val):
             return default
 
     return default_if_none_converter
+
+
+def to_bool(val):
+    """
+    Convert "boolean" strings (e.g., from env. vars.) to real booleans.
+
+    Values mapping to :code:`True`:
+
+    - :code:`True`
+    - :code:`"true"` / :code:`"t"`
+    - :code:`"yes"` / :code:`"y"`
+    - :code:`"on"`
+    - :code:`"1"`
+    - :code:`1`
+
+    Values mapping to :code:`False`:
+
+    - :code:`False`
+    - :code:`"false"` / :code:`"f"`
+    - :code:`"no"` / :code:`"n"`
+    - :code:`"off"`
+    - :code:`"0"`
+    - :code:`0`
+
+    :raises ValueError: for any other value.
+
+    .. versionadded:: 21.3.0
+    """
+    if isinstance(val, str):
+        val = val.lower()
+    truthy = {True, "true", "t", "yes", "y", "on", "1", 1}
+    falsy = {False, "false", "f", "no", "n", "off", "0", 0}
+    try:
+        if val in truthy:
+            return True
+        if val in falsy:
+            return False
+    except TypeError:
+        # Raised when "val" is not hashable (e.g., lists)
+        pass
+    raise ValueError("Cannot convert value to bool: {}".format(val))

lib/spack/external/_vendoring/attr/converters.pyi

@@ -0,0 +1,13 @@
+from typing import Callable, Optional, TypeVar, overload
+
+from . import _ConverterType
+
+_T = TypeVar("_T")
+
+def pipe(*validators: _ConverterType) -> _ConverterType: ...
+def optional(converter: _ConverterType) -> _ConverterType: ...
+@overload
+def default_if_none(default: _T) -> _ConverterType: ...
+@overload
+def default_if_none(*, factory: Callable[[], _T]) -> _ConverterType: ...
+def to_bool(val: str) -> bool: ...

lib/spack/external/_vendoring/attr/exceptions.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import, division, print_function
+# SPDX-License-Identifier: MIT
 
 
 class FrozenError(AttributeError):

lib/spack/external/_vendoring/attr/exceptions.pyi

@@ -0,0 +1,17 @@
+from typing import Any
+
+class FrozenError(AttributeError):
+    msg: str = ...
+
+class FrozenInstanceError(FrozenError): ...
+class FrozenAttributeError(FrozenError): ...
+class AttrsAttributeNotFoundError(ValueError): ...
+class NotAnAttrsClassError(ValueError): ...
+class DefaultAlreadySetError(RuntimeError): ...
+class UnannotatedAttributeError(RuntimeError): ...
+class PythonTooOldError(RuntimeError): ...
+
+class NotCallableError(TypeError):
+    msg: str = ...
+    value: Any = ...
+    def __init__(self, msg: str, value: Any) -> None: ...

lib/spack/external/_vendoring/attr/filters.py

@@ -1,10 +1,9 @@
+# SPDX-License-Identifier: MIT
+
 """
 Commonly useful filters for `attr.asdict`.
 """
 
-from __future__ import absolute_import, division, print_function
-
-from ._compat import isclass
 from ._make import Attribute
 
 
@@ -13,17 +12,17 @@ def _split_what(what):
     Returns a tuple of `frozenset`s of classes and attributes.
     """
     return (
-        frozenset(cls for cls in what if isclass(cls)),
+        frozenset(cls for cls in what if isinstance(cls, type)),
         frozenset(cls for cls in what if isinstance(cls, Attribute)),
     )
 
 
 def include(*what):
     """
-    Whitelist *what*.
+    Include *what*.
 
-    :param what: What to whitelist.
-    :type what: `list` of `type` or `attr.Attribute`\\ s
+    :param what: What to include.
+    :type what: `list` of `type` or `attrs.Attribute`\\ s
 
     :rtype: `callable`
     """
@@ -37,10 +36,10 @@ def include_(attribute, value):
 
 def exclude(*what):
     """
-    Blacklist *what*.
+    Exclude *what*.
 
-    :param what: What to blacklist.
-    :type what: `list` of classes or `attr.Attribute`\\ s.
+    :param what: What to exclude.
+    :type what: `list` of classes or `attrs.Attribute`\\ s.
 
     :rtype: `callable`
     """

lib/spack/external/_vendoring/attr/filters.pyi

@@ -0,0 +1,6 @@
+from typing import Any, Union
+
+from . import Attribute, _FilterType
+
+def include(*what: Union[type, Attribute[Any]]) -> _FilterType[Any]: ...
+def exclude(*what: Union[type, Attribute[Any]]) -> _FilterType[Any]: ...

lib/spack/external/_vendoring/attr/setters.py

@@ -1,8 +1,9 @@
+# SPDX-License-Identifier: MIT
+
 """
 Commonly used hooks for on_setattr.
 """
 
-from __future__ import absolute_import, division, print_function
 
 from . import _config
 from .exceptions import FrozenAttributeError
@@ -67,11 +68,6 @@ def convert(instance, attrib, new_value):
     return new_value
 
 
+# Sentinel for disabling class-wide *on_setattr* hooks for certain attributes.
+# autodata stopped working, so the docstring is inlined in the API docs.
 NO_OP = object()
-"""
-Sentinel for disabling class-wide *on_setattr* hooks for certain attributes.
-
-Does not work in `pipe` or within lists.
-
-.. versionadded:: 20.1.0
-"""

lib/spack/external/_vendoring/attr/setters.pyi

@@ -0,0 +1,19 @@
+from typing import Any, NewType, NoReturn, TypeVar, cast
+
+from . import Attribute, _OnSetAttrType
+
+_T = TypeVar("_T")
+
+def frozen(
+    instance: Any, attribute: Attribute[Any], new_value: Any
+) -> NoReturn: ...
+def pipe(*setters: _OnSetAttrType) -> _OnSetAttrType: ...
+def validate(instance: Any, attribute: Attribute[_T], new_value: _T) -> _T: ...
+
+# convert is allowed to return Any, because they can be chained using pipe.
+def convert(
+    instance: Any, attribute: Attribute[Any], new_value: Any
+) -> Any: ...
+
+_NoOpType = NewType("_NoOpType", object)
+NO_OP: _NoOpType

lib/spack/external/_vendoring/attr/validators.py

@@ -1,30 +1,98 @@
+# SPDX-License-Identifier: MIT
+
 """
 Commonly useful validators.
 """
 
-from __future__ import absolute_import, division, print_function
 
+import operator
 import re
 
+from contextlib import contextmanager
+
+from ._config import get_run_validators, set_run_validators
 from ._make import _AndValidator, and_, attrib, attrs
 from .exceptions import NotCallableError
 
 
+try:
+    Pattern = re.Pattern
+except AttributeError:  # Python <3.7 lacks a Pattern type.
+    Pattern = type(re.compile(""))
+
+
 __all__ = [
     "and_",
     "deep_iterable",
     "deep_mapping",
+    "disabled",
+    "ge",
+    "get_disabled",
+    "gt",
     "in_",
     "instance_of",
     "is_callable",
+    "le",
+    "lt",
     "matches_re",
+    "max_len",
+    "min_len",
     "optional",
     "provides",
+    "set_disabled",
 ]
 
 
+def set_disabled(disabled):
+    """
+    Globally disable or enable running validators.
+
+    By default, they are run.
+
+    :param disabled: If ``True``, disable running all validators.
+    :type disabled: bool
+
+    .. warning::
+
+        This function is not thread-safe!
+
+    .. versionadded:: 21.3.0
+    """
+    set_run_validators(not disabled)
+
+
+def get_disabled():
+    """
+    Return a bool indicating whether validators are currently disabled or not.
+
+    :return: ``True`` if validators are currently disabled.
+    :rtype: bool
+
+    .. versionadded:: 21.3.0
+    """
+    return not get_run_validators()
+
+
+@contextmanager
+def disabled():
+    """
+    Context manager that disables running validators within its context.
+
+    .. warning::
+
+        This context manager is not thread-safe!
+
+    .. versionadded:: 21.3.0
+    """
+    set_run_validators(False)
+    try:
+        yield
+    finally:
+        set_run_validators(True)
+
+
 @attrs(repr=False, slots=True, hash=True)
-class _InstanceOfValidator(object):
+class _InstanceOfValidator:
     type = attrib()
 
     def __call__(self, inst, attr, value):
@@ -61,16 +129,15 @@ def instance_of(type):
     :type type: type or tuple of types
 
     :raises TypeError: With a human readable error message, the attribute
-        (of type `attr.Attribute`), the expected type, and the value it
+        (of type `attrs.Attribute`), the expected type, and the value it
         got.
     """
     return _InstanceOfValidator(type)
 
 
 @attrs(repr=False, frozen=True, slots=True)
-class _MatchesReValidator(object):
-    regex = attrib()
-    flags = attrib()
+class _MatchesReValidator:
+    pattern = attrib()
     match_func = attrib()
 
     def __call__(self, inst, attr, value):
@@ -79,18 +146,18 @@ def __call__(self, inst, attr, value):
         """
         if not self.match_func(value):
             raise ValueError(
-                "'{name}' must match regex {regex!r}"
+                "'{name}' must match regex {pattern!r}"
                 " ({value!r} doesn't)".format(
-                    name=attr.name, regex=self.regex.pattern, value=value
+                    name=attr.name, pattern=self.pattern.pattern, value=value
                 ),
                 attr,
-                self.regex,
+                self.pattern,
                 value,
             )
 
     def __repr__(self):
-        return "<matches_re validator for pattern {regex!r}>".format(
-            regex=self.regex
+        return "<matches_re validator for pattern {pattern!r}>".format(
+            pattern=self.pattern
         )
 
 
@@ -99,48 +166,51 @@ def matches_re(regex, flags=0, func=None):
     A validator that raises `ValueError` if the initializer is called
     with a string that doesn't match *regex*.
 
-    :param str regex: a regex string to match against
+    :param regex: a regex string or precompiled pattern to match against
     :param int flags: flags that will be passed to the underlying re function
         (default 0)
-    :param callable func: which underlying `re` function to call (options
-        are `re.fullmatch`, `re.search`, `re.match`, default
-        is ``None`` which means either `re.fullmatch` or an emulation of
-        it on Python 2). For performance reasons, they won't be used directly
-        but on a pre-`re.compile`\ ed pattern.
+    :param callable func: which underlying `re` function to call. Valid options
+        are `re.fullmatch`, `re.search`, and `re.match`; the default ``None``
+        means `re.fullmatch`. For performance reasons, the pattern is always
+        precompiled using `re.compile`.
 
     .. versionadded:: 19.2.0
+    .. versionchanged:: 21.3.0 *regex* can be a pre-compiled pattern.
     """
-    fullmatch = getattr(re, "fullmatch", None)
-    valid_funcs = (fullmatch, None, re.search, re.match)
+    valid_funcs = (re.fullmatch, None, re.search, re.match)
     if func not in valid_funcs:
         raise ValueError(
-            "'func' must be one of %s."
-            % (
+            "'func' must be one of {}.".format(
                 ", ".join(
                     sorted(
                         e and e.__name__ or "None" for e in set(valid_funcs)
                     )
-                ),
+                )
             )
         )
 
-    pattern = re.compile(regex, flags)
+    if isinstance(regex, Pattern):
+        if flags:
+            raise TypeError(
+                "'flags' can only be used with a string pattern; "
+                "pass flags to re.compile() instead"
+            )
+        pattern = regex
+    else:
+        pattern = re.compile(regex, flags)
+
     if func is re.match:
         match_func = pattern.match
     elif func is re.search:
         match_func = pattern.search
     else:
-        if fullmatch:
-            match_func = pattern.fullmatch
-        else:
-            pattern = re.compile(r"(?:{})\Z".format(regex), flags)
-            match_func = pattern.match
+        match_func = pattern.fullmatch
 
-    return _MatchesReValidator(pattern, flags, match_func)
+    return _MatchesReValidator(pattern, match_func)
 
 
 @attrs(repr=False, slots=True, hash=True)
-class _ProvidesValidator(object):
+class _ProvidesValidator:
     interface = attrib()
 
     def __call__(self, inst, attr, value):
@@ -175,14 +245,14 @@ def provides(interface):
     :type interface: ``zope.interface.Interface``
 
     :raises TypeError: With a human readable error message, the attribute
-        (of type `attr.Attribute`), the expected interface, and the
+        (of type `attrs.Attribute`), the expected interface, and the
         value it got.
     """
     return _ProvidesValidator(interface)
 
 
 @attrs(repr=False, slots=True, hash=True)
-class _OptionalValidator(object):
+class _OptionalValidator:
     validator = attrib()
 
     def __call__(self, inst, attr, value):
@@ -216,7 +286,7 @@ def optional(validator):
 
 
 @attrs(repr=False, slots=True, hash=True)
-class _InValidator(object):
+class _InValidator:
     options = attrib()
 
     def __call__(self, inst, attr, value):
@@ -229,7 +299,10 @@ def __call__(self, inst, attr, value):
             raise ValueError(
                 "'{name}' must be in {options!r} (got {value!r})".format(
                     name=attr.name, options=self.options, value=value
-                )
+                ),
+                attr,
+                self.options,
+                value,
             )
 
     def __repr__(self):
@@ -248,16 +321,20 @@ def in_(options):
     :type options: list, tuple, `enum.Enum`, ...
 
     :raises ValueError: With a human readable error message, the attribute (of
-       type `attr.Attribute`), the expected options, and the value it
+       type `attrs.Attribute`), the expected options, and the value it
        got.
 
     .. versionadded:: 17.1.0
+    .. versionchanged:: 22.1.0
+       The ValueError was incomplete until now and only contained the human
+       readable error message. Now it contains all the information that has
+       been promised since 17.1.0.
     """
     return _InValidator(options)
 
 
 @attrs(repr=False, slots=False, hash=True)
-class _IsCallableValidator(object):
+class _IsCallableValidator:
     def __call__(self, inst, attr, value):
         """
         We use a callable class to be able to change the ``__repr__``.
@@ -287,14 +364,14 @@ def is_callable():
     .. versionadded:: 19.1.0
 
     :raises `attr.exceptions.NotCallableError`: With a human readable error
-        message containing the attribute (`attr.Attribute`) name,
+        message containing the attribute (`attrs.Attribute`) name,
         and the value it got.
     """
     return _IsCallableValidator()
 
 
 @attrs(repr=False, slots=True, hash=True)
-class _DeepIterable(object):
+class _DeepIterable:
     member_validator = attrib(validator=is_callable())
     iterable_validator = attrib(
         default=None, validator=optional(is_callable())
@@ -329,7 +406,7 @@ def deep_iterable(member_validator, iterable_validator=None):
     """
     A validator that performs deep validation of an iterable.
 
-    :param member_validator: Validator to apply to iterable members
+    :param member_validator: Validator(s) to apply to iterable members
     :param iterable_validator: Validator to apply to iterable itself
         (optional)
 
@@ -337,11 +414,13 @@ def deep_iterable(member_validator, iterable_validator=None):
 
     :raises TypeError: if any sub-validators fail
     """
+    if isinstance(member_validator, (list, tuple)):
+        member_validator = and_(*member_validator)
     return _DeepIterable(member_validator, iterable_validator)
 
 
 @attrs(repr=False, slots=True, hash=True)
-class _DeepMapping(object):
+class _DeepMapping:
     key_validator = attrib(validator=is_callable())
     value_validator = attrib(validator=is_callable())
     mapping_validator = attrib(default=None, validator=optional(is_callable()))
@@ -377,3 +456,139 @@ def deep_mapping(key_validator, value_validator, mapping_validator=None):
     :raises TypeError: if any sub-validators fail
     """
     return _DeepMapping(key_validator, value_validator, mapping_validator)
+
+
+@attrs(repr=False, frozen=True, slots=True)
+class _NumberValidator:
+    bound = attrib()
+    compare_op = attrib()
+    compare_func = attrib()
+
+    def __call__(self, inst, attr, value):
+        """
+        We use a callable class to be able to change the ``__repr__``.
+        """
+        if not self.compare_func(value, self.bound):
+            raise ValueError(
+                "'{name}' must be {op} {bound}: {value}".format(
+                    name=attr.name,
+                    op=self.compare_op,
+                    bound=self.bound,
+                    value=value,
+                )
+            )
+
+    def __repr__(self):
+        return "<Validator for x {op} {bound}>".format(
+            op=self.compare_op, bound=self.bound
+        )
+
+
+def lt(val):
+    """
+    A validator that raises `ValueError` if the initializer is called
+    with a number larger or equal to *val*.
+
+    :param val: Exclusive upper bound for values
+
+    .. versionadded:: 21.3.0
+    """
+    return _NumberValidator(val, "<", operator.lt)
+
+
+def le(val):
+    """
+    A validator that raises `ValueError` if the initializer is called
+    with a number greater than *val*.
+
+    :param val: Inclusive upper bound for values
+
+    .. versionadded:: 21.3.0
+    """
+    return _NumberValidator(val, "<=", operator.le)
+
+
+def ge(val):
+    """
+    A validator that raises `ValueError` if the initializer is called
+    with a number smaller than *val*.
+
+    :param val: Inclusive lower bound for values
+
+    .. versionadded:: 21.3.0
+    """
+    return _NumberValidator(val, ">=", operator.ge)
+
+
+def gt(val):
+    """
+    A validator that raises `ValueError` if the initializer is called
+    with a number smaller or equal to *val*.
+
+    :param val: Exclusive lower bound for values
+
+    .. versionadded:: 21.3.0
+    """
+    return _NumberValidator(val, ">", operator.gt)
+
+
+@attrs(repr=False, frozen=True, slots=True)
+class _MaxLengthValidator:
+    max_length = attrib()
+
+    def __call__(self, inst, attr, value):
+        """
+        We use a callable class to be able to change the ``__repr__``.
+        """
+        if len(value) > self.max_length:
+            raise ValueError(
+                "Length of '{name}' must be <= {max}: {len}".format(
+                    name=attr.name, max=self.max_length, len=len(value)
+                )
+            )
+
+    def __repr__(self):
+        return "<max_len validator for {max}>".format(max=self.max_length)
+
+
+def max_len(length):
+    """
+    A validator that raises `ValueError` if the initializer is called
+    with a string or iterable that is longer than *length*.
+
+    :param int length: Maximum length of the string or iterable
+
+    .. versionadded:: 21.3.0
+    """
+    return _MaxLengthValidator(length)
+
+
+@attrs(repr=False, frozen=True, slots=True)
+class _MinLengthValidator:
+    min_length = attrib()
+
+    def __call__(self, inst, attr, value):
+        """
+        We use a callable class to be able to change the ``__repr__``.
+        """
+        if len(value) < self.min_length:
+            raise ValueError(
+                "Length of '{name}' must be => {min}: {len}".format(
+                    name=attr.name, min=self.min_length, len=len(value)
+                )
+            )
+
+    def __repr__(self):
+        return "<min_len validator for {min}>".format(min=self.min_length)
+
+
+def min_len(length):
+    """
+    A validator that raises `ValueError` if the initializer is called
+    with a string or iterable that is shorter than *length*.
+
+    :param int length: Minimum length of the string or iterable
+
+    .. versionadded:: 22.1.0
+    """
+    return _MinLengthValidator(length)

lib/spack/external/_vendoring/attr/validators.pyi

@@ -0,0 +1,80 @@
+from typing import (
+    Any,
+    AnyStr,
+    Callable,
+    Container,
+    ContextManager,
+    Iterable,
+    List,
+    Mapping,
+    Match,
+    Optional,
+    Pattern,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+    overload,
+)
+
+from . import _ValidatorType
+from . import _ValidatorArgType
+
+_T = TypeVar("_T")
+_T1 = TypeVar("_T1")
+_T2 = TypeVar("_T2")
+_T3 = TypeVar("_T3")
+_I = TypeVar("_I", bound=Iterable)
+_K = TypeVar("_K")
+_V = TypeVar("_V")
+_M = TypeVar("_M", bound=Mapping)
+
+def set_disabled(run: bool) -> None: ...
+def get_disabled() -> bool: ...
+def disabled() -> ContextManager[None]: ...
+
+# To be more precise on instance_of use some overloads.
+# If there are more than 3 items in the tuple then we fall back to Any
+@overload
+def instance_of(type: Type[_T]) -> _ValidatorType[_T]: ...
+@overload
+def instance_of(type: Tuple[Type[_T]]) -> _ValidatorType[_T]: ...
+@overload
+def instance_of(
+    type: Tuple[Type[_T1], Type[_T2]]
+) -> _ValidatorType[Union[_T1, _T2]]: ...
+@overload
+def instance_of(
+    type: Tuple[Type[_T1], Type[_T2], Type[_T3]]
+) -> _ValidatorType[Union[_T1, _T2, _T3]]: ...
+@overload
+def instance_of(type: Tuple[type, ...]) -> _ValidatorType[Any]: ...
+def provides(interface: Any) -> _ValidatorType[Any]: ...
+def optional(
+    validator: Union[_ValidatorType[_T], List[_ValidatorType[_T]]]
+) -> _ValidatorType[Optional[_T]]: ...
+def in_(options: Container[_T]) -> _ValidatorType[_T]: ...
+def and_(*validators: _ValidatorType[_T]) -> _ValidatorType[_T]: ...
+def matches_re(
+    regex: Union[Pattern[AnyStr], AnyStr],
+    flags: int = ...,
+    func: Optional[
+        Callable[[AnyStr, AnyStr, int], Optional[Match[AnyStr]]]
+    ] = ...,
+) -> _ValidatorType[AnyStr]: ...
+def deep_iterable(
+    member_validator: _ValidatorArgType[_T],
+    iterable_validator: Optional[_ValidatorType[_I]] = ...,
+) -> _ValidatorType[_I]: ...
+def deep_mapping(
+    key_validator: _ValidatorType[_K],
+    value_validator: _ValidatorType[_V],
+    mapping_validator: Optional[_ValidatorType[_M]] = ...,
+) -> _ValidatorType[_M]: ...
+def is_callable() -> _ValidatorType[_T]: ...
+def lt(val: _T) -> _ValidatorType[_T]: ...
+def le(val: _T) -> _ValidatorType[_T]: ...
+def ge(val: _T) -> _ValidatorType[_T]: ...
+def gt(val: _T) -> _ValidatorType[_T]: ...
+def max_len(length: int) -> _ValidatorType[_T]: ...
+def min_len(length: int) -> _ValidatorType[_T]: ...

lib/spack/external/_vendoring/attrs/LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 Hynek Schlawack
+Copyright (c) 2015 Hynek Schlawack and the attrs contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

lib/spack/external/_vendoring/attrs/__init__.py

@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: MIT
+
+from attr import (
+    NOTHING,
+    Attribute,
+    Factory,
+    __author__,
+    __copyright__,
+    __description__,
+    __doc__,
+    __email__,
+    __license__,
+    __title__,
+    __url__,
+    __version__,
+    __version_info__,
+    assoc,
+    cmp_using,
+    define,
+    evolve,
+    field,
+    fields,
+    fields_dict,
+    frozen,
+    has,
+    make_class,
+    mutable,
+    resolve_types,
+    validate,
+)
+from attr._next_gen import asdict, astuple
+
+from . import converters, exceptions, filters, setters, validators
+
+
+__all__ = [
+    "__author__",
+    "__copyright__",
+    "__description__",
+    "__doc__",
+    "__email__",
+    "__license__",
+    "__title__",
+    "__url__",
+    "__version__",
+    "__version_info__",
+    "asdict",
+    "assoc",
+    "astuple",
+    "Attribute",
+    "cmp_using",
+    "converters",
+    "define",
+    "evolve",
+    "exceptions",
+    "Factory",
+    "field",
+    "fields_dict",
+    "fields",
+    "filters",
+    "frozen",
+    "has",
+    "make_class",
+    "mutable",
+    "NOTHING",
+    "resolve_types",
+    "setters",
+    "validate",
+    "validators",
+]

lib/spack/external/_vendoring/attrs/__init__.pyi

@@ -0,0 +1,66 @@
+from typing import (
+    Any,
+    Callable,
+    Dict,
+    Mapping,
+    Optional,
+    Sequence,
+    Tuple,
+    Type,
+)
+
+# Because we need to type our own stuff, we have to make everything from
+# attr explicitly public too.
+from attr import __author__ as __author__
+from attr import __copyright__ as __copyright__
+from attr import __description__ as __description__
+from attr import __email__ as __email__
+from attr import __license__ as __license__
+from attr import __title__ as __title__
+from attr import __url__ as __url__
+from attr import __version__ as __version__
+from attr import __version_info__ as __version_info__
+from attr import _FilterType
+from attr import assoc as assoc
+from attr import Attribute as Attribute
+from attr import cmp_using as cmp_using
+from attr import converters as converters
+from attr import define as define
+from attr import evolve as evolve
+from attr import exceptions as exceptions
+from attr import Factory as Factory
+from attr import field as field
+from attr import fields as fields
+from attr import fields_dict as fields_dict
+from attr import filters as filters
+from attr import frozen as frozen
+from attr import has as has
+from attr import make_class as make_class
+from attr import mutable as mutable
+from attr import NOTHING as NOTHING
+from attr import resolve_types as resolve_types
+from attr import setters as setters
+from attr import validate as validate
+from attr import validators as validators
+
+# TODO: see definition of attr.asdict/astuple
+def asdict(
+    inst: Any,
+    recurse: bool = ...,
+    filter: Optional[_FilterType[Any]] = ...,
+    dict_factory: Type[Mapping[Any, Any]] = ...,
+    retain_collection_types: bool = ...,
+    value_serializer: Optional[
+        Callable[[type, Attribute[Any], Any], Any]
+    ] = ...,
+    tuple_keys: bool = ...,
+) -> Dict[str, Any]: ...
+
+# TODO: add support for returning NamedTuple from the mypy plugin
+def astuple(
+    inst: Any,
+    recurse: bool = ...,
+    filter: Optional[_FilterType[Any]] = ...,
+    tuple_factory: Type[Sequence[Any]] = ...,
+    retain_collection_types: bool = ...,
+) -> Tuple[Any, ...]: ...

lib/spack/external/_vendoring/attrs/converters.py

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: MIT
+
+from attr.converters import *  # noqa

lib/spack/external/_vendoring/attrs/exceptions.py

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: MIT
+
+from attr.exceptions import *  # noqa

lib/spack/external/_vendoring/attrs/filters.py

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: MIT
+
+from attr.filters import *  # noqa

lib/spack/external/_vendoring/attrs/setters.py

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: MIT
+
+from attr.setters import *  # noqa

lib/spack/external/_vendoring/attrs/validators.py

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: MIT
+
+from attr.validators import *  # noqa

lib/spack/external/_vendoring/distro/LICENSE

@@ -0,0 +1,202 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+
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+   See the License for the specific language governing permissions and
+   limitations under the License.
+

lib/spack/external/_vendoring/distro/__init__.py

@@ -0,0 +1,54 @@
+from .distro import (
+    NORMALIZED_DISTRO_ID,
+    NORMALIZED_LSB_ID,
+    NORMALIZED_OS_ID,
+    LinuxDistribution,
+    __version__,
+    build_number,
+    codename,
+    distro_release_attr,
+    distro_release_info,
+    id,
+    info,
+    like,
+    linux_distribution,
+    lsb_release_attr,
+    lsb_release_info,
+    major_version,
+    minor_version,
+    name,
+    os_release_attr,
+    os_release_info,
+    uname_attr,
+    uname_info,
+    version,
+    version_parts,
+)
+
+__all__ = [
+    "NORMALIZED_DISTRO_ID",
+    "NORMALIZED_LSB_ID",
+    "NORMALIZED_OS_ID",
+    "LinuxDistribution",
+    "build_number",
+    "codename",
+    "distro_release_attr",
+    "distro_release_info",
+    "id",
+    "info",
+    "like",
+    "linux_distribution",
+    "lsb_release_attr",
+    "lsb_release_info",
+    "major_version",
+    "minor_version",
+    "name",
+    "os_release_attr",
+    "os_release_info",
+    "uname_attr",
+    "uname_info",
+    "version",
+    "version_parts",
+]
+
+__version__ = __version__

lib/spack/external/_vendoring/distro/__main__.py

@@ -0,0 +1,4 @@
+from .distro import main
+
+if __name__ == "__main__":
+    main()

lib/spack/external/_vendoring/distro/distro.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 # Copyright 2015,2016,2017 Nir Cohen
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -36,40 +37,39 @@
 import subprocess
 import sys
 import warnings
+from typing import (
+    Any,
+    Callable,
+    Dict,
+    Iterable,
+    Optional,
+    Sequence,
+    TextIO,
+    Tuple,
+    Type,
+)
 
-__version__ = "1.6.0"
+try:
+    from typing import TypedDict
+except ImportError:
+    # Python 3.7
+    TypedDict = dict
 
-# Use `if False` to avoid an ImportError on Python 2. After dropping Python 2
-# support, can use typing.TYPE_CHECKING instead. See:
-# https://docs.python.org/3/library/typing.html#typing.TYPE_CHECKING
-if False:  # pragma: nocover
-    from typing import (
-        Any,
-        Callable,
-        Dict,
-        Iterable,
-        Optional,
-        Sequence,
-        TextIO,
-        Tuple,
-        Type,
-        TypedDict,
-        Union,
-    )
+__version__ = "1.8.0"
 
-    VersionDict = TypedDict(
-        "VersionDict", {"major": str, "minor": str, "build_number": str}
-    )
-    InfoDict = TypedDict(
-        "InfoDict",
-        {
-            "id": str,
-            "version": str,
-            "version_parts": VersionDict,
-            "like": str,
-            "codename": str,
-        },
-    )
+
+class VersionDict(TypedDict):
+    major: str
+    minor: str
+    build_number: str
+
+
+class InfoDict(TypedDict):
+    id: str
+    version: str
+    version_parts: VersionDict
+    like: str
+    codename: str
 
 
 _UNIXCONFDIR = os.environ.get("UNIXCONFDIR", "/etc")
@@ -85,6 +85,7 @@
 #: * Value: Normalized value.
 NORMALIZED_OS_ID = {
     "ol": "oracle",  # Oracle Linux
+    "opensuse-leap": "opensuse",  # Newer versions of OpenSuSE report as opensuse-leap
 }
 
 #: Translation table for normalizing the "Distributor ID" attribute returned by
@@ -121,6 +122,26 @@
 # Pattern for base file name of distro release file
 _DISTRO_RELEASE_BASENAME_PATTERN = re.compile(r"(\w+)[-_](release|version)$")
 
+# Base file names to be looked up for if _UNIXCONFDIR is not readable.
+_DISTRO_RELEASE_BASENAMES = [
+    "SuSE-release",
+    "arch-release",
+    "base-release",
+    "centos-release",
+    "fedora-release",
+    "gentoo-release",
+    "mageia-release",
+    "mandrake-release",
+    "mandriva-release",
+    "mandrivalinux-release",
+    "manjaro-release",
+    "oracle-release",
+    "redhat-release",
+    "rocky-release",
+    "sl-release",
+    "slackware-version",
+]
+
 # Base file names to be ignored when searching for distro release file
 _DISTRO_RELEASE_IGNORE_BASENAMES = (
     "debian_version",
@@ -133,8 +154,7 @@
 )
 
 
-def linux_distribution(full_distribution_name=True):
-    # type: (bool) -> Tuple[str, str, str]
+def linux_distribution(full_distribution_name: bool = True) -> Tuple[str, str, str]:
     """
     .. deprecated:: 1.6.0
 
@@ -151,7 +171,8 @@ def linux_distribution(full_distribution_name=True):
 
     * ``version``:  The result of :func:`distro.version`.
 
-    * ``codename``:  The result of :func:`distro.codename`.
+    * ``codename``:  The extra item (usually in parentheses) after the
+      os-release version number, or the result of :func:`distro.codename`.
 
     The interface of this function is compatible with the original
     :py:func:`platform.linux_distribution` function, supporting a subset of
@@ -176,8 +197,7 @@ def linux_distribution(full_distribution_name=True):
     return _distro.linux_distribution(full_distribution_name)
 
 
-def id():
-    # type: () -> str
+def id() -> str:
     """
     Return the distro ID of the current distribution, as a
     machine-readable string.
@@ -198,8 +218,9 @@ def id():
     "fedora"        Fedora
     "sles"          SUSE Linux Enterprise Server
     "opensuse"      openSUSE
-    "amazon"        Amazon Linux
+    "amzn"          Amazon Linux
     "arch"          Arch Linux
+    "buildroot"     Buildroot
     "cloudlinux"    CloudLinux OS
     "exherbo"       Exherbo Linux
     "gentoo"        GenToo Linux
@@ -219,6 +240,9 @@ def id():
     "netbsd"        NetBSD
     "freebsd"       FreeBSD
     "midnightbsd"   MidnightBSD
+    "rocky"         Rocky Linux
+    "aix"           AIX
+    "guix"          Guix System
     ==============  =========================================
 
     If you have a need to get distros for reliable IDs added into this set,
@@ -256,8 +280,7 @@ def id():
     return _distro.id()
 
 
-def name(pretty=False):
-    # type: (bool) -> str
+def name(pretty: bool = False) -> str:
     """
     Return the name of the current OS distribution, as a human-readable
     string.
@@ -296,8 +319,7 @@ def name(pretty=False):
     return _distro.name(pretty)
 
 
-def version(pretty=False, best=False):
-    # type: (bool, bool) -> str
+def version(pretty: bool = False, best: bool = False) -> str:
     """
     Return the version of the current OS distribution, as a human-readable
     string.
@@ -313,6 +335,10 @@ def version(pretty=False, best=False):
     sources in a fixed priority order does not always yield the most precise
     version (e.g. for Debian 8.2, or CentOS 7.1).
 
+    Some other distributions may not provide this kind of information. In these
+    cases, an empty string would be returned. This behavior can be observed
+    with rolling releases distributions (e.g. Arch Linux).
+
     The *best* parameter can be used to control the approach for the returned
     version:
 
@@ -341,8 +367,7 @@ def version(pretty=False, best=False):
     return _distro.version(pretty, best)
 
 
-def version_parts(best=False):
-    # type: (bool) -> Tuple[str, str, str]
+def version_parts(best: bool = False) -> Tuple[str, str, str]:
     """
     Return the version of the current OS distribution as a tuple
     ``(major, minor, build_number)`` with items as follows:
@@ -359,8 +384,7 @@ def version_parts(best=False):
     return _distro.version_parts(best)
 
 
-def major_version(best=False):
-    # type: (bool) -> str
+def major_version(best: bool = False) -> str:
     """
     Return the major version of the current OS distribution, as a string,
     if provided.
@@ -373,8 +397,7 @@ def major_version(best=False):
     return _distro.major_version(best)
 
 
-def minor_version(best=False):
-    # type: (bool) -> str
+def minor_version(best: bool = False) -> str:
     """
     Return the minor version of the current OS distribution, as a string,
     if provided.
@@ -387,8 +410,7 @@ def minor_version(best=False):
     return _distro.minor_version(best)
 
 
-def build_number(best=False):
-    # type: (bool) -> str
+def build_number(best: bool = False) -> str:
     """
     Return the build number of the current OS distribution, as a string,
     if provided.
@@ -401,8 +423,7 @@ def build_number(best=False):
     return _distro.build_number(best)
 
 
-def like():
-    # type: () -> str
+def like() -> str:
     """
     Return a space-separated list of distro IDs of distributions that are
     closely related to the current OS distribution in regards to packaging
@@ -419,8 +440,7 @@ def like():
     return _distro.like()
 
 
-def codename():
-    # type: () -> str
+def codename() -> str:
     """
     Return the codename for the release of the current OS distribution,
     as a string.
@@ -444,8 +464,7 @@ def codename():
     return _distro.codename()
 
 
-def info(pretty=False, best=False):
-    # type: (bool, bool) -> InfoDict
+def info(pretty: bool = False, best: bool = False) -> InfoDict:
     """
     Return certain machine-readable information items about the current OS
     distribution in a dictionary, as shown in the following example:
@@ -489,8 +508,7 @@ def info(pretty=False, best=False):
     return _distro.info(pretty, best)
 
 
-def os_release_info():
-    # type: () -> Dict[str, str]
+def os_release_info() -> Dict[str, str]:
     """
     Return a dictionary containing key-value pairs for the information items
     from the os-release file data source of the current OS distribution.
@@ -500,8 +518,7 @@ def os_release_info():
     return _distro.os_release_info()
 
 
-def lsb_release_info():
-    # type: () -> Dict[str, str]
+def lsb_release_info() -> Dict[str, str]:
     """
     Return a dictionary containing key-value pairs for the information items
     from the lsb_release command data source of the current OS distribution.
@@ -512,8 +529,7 @@ def lsb_release_info():
     return _distro.lsb_release_info()
 
 
-def distro_release_info():
-    # type: () -> Dict[str, str]
+def distro_release_info() -> Dict[str, str]:
     """
     Return a dictionary containing key-value pairs for the information items
     from the distro release file data source of the current OS distribution.
@@ -523,8 +539,7 @@ def distro_release_info():
     return _distro.distro_release_info()
 
 
-def uname_info():
-    # type: () -> Dict[str, str]
+def uname_info() -> Dict[str, str]:
     """
     Return a dictionary containing key-value pairs for the information items
     from the distro release file data source of the current OS distribution.
@@ -532,8 +547,7 @@ def uname_info():
     return _distro.uname_info()
 
 
-def os_release_attr(attribute):
-    # type: (str) -> str
+def os_release_attr(attribute: str) -> str:
     """
     Return a single named information item from the os-release file data source
     of the current OS distribution.
@@ -552,8 +566,7 @@ def os_release_attr(attribute):
     return _distro.os_release_attr(attribute)
 
 
-def lsb_release_attr(attribute):
-    # type: (str) -> str
+def lsb_release_attr(attribute: str) -> str:
     """
     Return a single named information item from the lsb_release command output
     data source of the current OS distribution.
@@ -573,8 +586,7 @@ def lsb_release_attr(attribute):
     return _distro.lsb_release_attr(attribute)
 
 
-def distro_release_attr(attribute):
-    # type: (str) -> str
+def distro_release_attr(attribute: str) -> str:
     """
     Return a single named information item from the distro release file
     data source of the current OS distribution.
@@ -593,8 +605,7 @@ def distro_release_attr(attribute):
     return _distro.distro_release_attr(attribute)
 
 
-def uname_attr(attribute):
-    # type: (str) -> str
+def uname_attr(attribute: str) -> str:
     """
     Return a single named information item from the distro release file
     data source of the current OS distribution.
@@ -615,25 +626,23 @@ def uname_attr(attribute):
     from functools import cached_property
 except ImportError:
     # Python < 3.8
-    class cached_property(object):  # type: ignore
+    class cached_property:  # type: ignore
         """A version of @property which caches the value.  On access, it calls the
         underlying function and sets the value in `__dict__` so future accesses
         will not re-call the property.
         """
 
-        def __init__(self, f):
-            # type: (Callable[[Any], Any]) -> None
+        def __init__(self, f: Callable[[Any], Any]) -> None:
             self._fname = f.__name__
             self._f = f
 
-        def __get__(self, obj, owner):
-            # type: (Any, Type[Any]) -> Any
-            assert obj is not None, "call {} on an instance".format(self._fname)
+        def __get__(self, obj: Any, owner: Type[Any]) -> Any:
+            assert obj is not None, f"call {self._fname} on an instance"
             ret = obj.__dict__[self._fname] = self._f(obj)
             return ret
 
 
-class LinuxDistribution(object):
+class LinuxDistribution:
     """
     Provides information about a OS distribution.
 
@@ -653,13 +662,13 @@ class LinuxDistribution(object):
 
     def __init__(
         self,
-        include_lsb=True,
-        os_release_file="",
-        distro_release_file="",
-        include_uname=True,
-        root_dir=None,
-    ):
-        # type: (bool, str, str, bool, Optional[str]) -> None
+        include_lsb: Optional[bool] = None,
+        os_release_file: str = "",
+        distro_release_file: str = "",
+        include_uname: Optional[bool] = None,
+        root_dir: Optional[str] = None,
+        include_oslevel: Optional[bool] = None,
+    ) -> None:
         """
         The initialization method of this class gathers information from the
         available data sources, and stores that in private instance attributes.
@@ -699,7 +708,13 @@ def __init__(
           be empty.
 
         * ``root_dir`` (string): The absolute path to the root directory to use
-          to find distro-related information files.
+          to find distro-related information files. Note that ``include_*``
+          parameters must not be enabled in combination with ``root_dir``.
+
+        * ``include_oslevel`` (bool): Controls whether (AIX) oslevel command
+          output is included as a data source. If the oslevel command is not
+          available in the program execution path the data source will be
+          empty.
 
         Public instance attributes:
 
@@ -718,14 +733,21 @@ def __init__(
           parameter. This controls whether the uname information will
           be loaded.
 
+        * ``include_oslevel`` (bool): The result of the ``include_oslevel``
+          parameter. This controls whether (AIX) oslevel information will be
+          loaded.
+
+        * ``root_dir`` (string): The result of the ``root_dir`` parameter.
+          The absolute path to the root directory to use to find distro-related
+          information files.
+
         Raises:
 
-        * :py:exc:`IOError`: Some I/O issue with an os-release file or distro
-          release file.
+        * :py:exc:`ValueError`: Initialization parameters combination is not
+           supported.
 
-        * :py:exc:`subprocess.CalledProcessError`: The lsb_release command had
-          some issue (other than not being available in the program execution
-          path).
+        * :py:exc:`OSError`: Some I/O issue with an os-release file or distro
+          release file.
 
         * :py:exc:`UnicodeError`: A data source has unexpected characters or
           uses an unexpected encoding.
@@ -754,11 +776,24 @@ def __init__(
                 self.os_release_file = usr_lib_os_release_file
 
         self.distro_release_file = distro_release_file or ""  # updated later
-        self.include_lsb = include_lsb
-        self.include_uname = include_uname
 
-    def __repr__(self):
-        # type: () -> str
+        is_root_dir_defined = root_dir is not None
+        if is_root_dir_defined and (include_lsb or include_uname or include_oslevel):
+            raise ValueError(
+                "Including subprocess data sources from specific root_dir is disallowed"
+                " to prevent false information"
+            )
+        self.include_lsb = (
+            include_lsb if include_lsb is not None else not is_root_dir_defined
+        )
+        self.include_uname = (
+            include_uname if include_uname is not None else not is_root_dir_defined
+        )
+        self.include_oslevel = (
+            include_oslevel if include_oslevel is not None else not is_root_dir_defined
+        )
+
+    def __repr__(self) -> str:
         """Return repr of all info"""
         return (
             "LinuxDistribution("
@@ -766,14 +801,18 @@ def __repr__(self):
             "distro_release_file={self.distro_release_file!r}, "
             "include_lsb={self.include_lsb!r}, "
             "include_uname={self.include_uname!r}, "
+            "include_oslevel={self.include_oslevel!r}, "
+            "root_dir={self.root_dir!r}, "
             "_os_release_info={self._os_release_info!r}, "
             "_lsb_release_info={self._lsb_release_info!r}, "
             "_distro_release_info={self._distro_release_info!r}, "
-            "_uname_info={self._uname_info!r})".format(self=self)
+            "_uname_info={self._uname_info!r}, "
+            "_oslevel_info={self._oslevel_info!r})".format(self=self)
         )
 
-    def linux_distribution(self, full_distribution_name=True):
-        # type: (bool) -> Tuple[str, str, str]
+    def linux_distribution(
+        self, full_distribution_name: bool = True
+    ) -> Tuple[str, str, str]:
         """
         Return information about the OS distribution that is compatible
         with Python's :func:`platform.linux_distribution`, supporting a subset
@@ -784,18 +823,16 @@ def linux_distribution(self, full_distribution_name=True):
         return (
             self.name() if full_distribution_name else self.id(),
             self.version(),
-            self.codename(),
+            self._os_release_info.get("release_codename") or self.codename(),
         )
 
-    def id(self):
-        # type: () -> str
+    def id(self) -> str:
         """Return the distro ID of the OS distribution, as a string.
 
         For details, see :func:`distro.id`.
         """
 
-        def normalize(distro_id, table):
-            # type: (str, Dict[str, str]) -> str
+        def normalize(distro_id: str, table: Dict[str, str]) -> str:
             distro_id = distro_id.lower().replace(" ", "_")
             return table.get(distro_id, distro_id)
 
@@ -817,8 +854,7 @@ def normalize(distro_id, table):
 
         return ""
 
-    def name(self, pretty=False):
-        # type: (bool) -> str
+    def name(self, pretty: bool = False) -> str:
         """
         Return the name of the OS distribution, as a string.
 
@@ -838,11 +874,10 @@ def name(self, pretty=False):
                 name = self.distro_release_attr("name") or self.uname_attr("name")
                 version = self.version(pretty=True)
                 if version:
-                    name = name + " " + version
+                    name = f"{name} {version}"
         return name or ""
 
-    def version(self, pretty=False, best=False):
-        # type: (bool, bool) -> str
+    def version(self, pretty: bool = False, best: bool = False) -> str:
         """
         Return the version of the OS distribution, as a string.
 
@@ -860,6 +895,12 @@ def version(self, pretty=False, best=False):
             ).get("version_id", ""),
             self.uname_attr("release"),
         ]
+        if self.uname_attr("id").startswith("aix"):
+            # On AIX platforms, prefer oslevel command output.
+            versions.insert(0, self.oslevel_info())
+        elif self.id() == "debian" or "debian" in self.like().split():
+            # On Debian-like, add debian_version file content to candidates list.
+            versions.append(self._debian_version)
         version = ""
         if best:
             # This algorithm uses the last version in priority order that has
@@ -875,11 +916,10 @@ def version(self, pretty=False, best=False):
                     version = v
                     break
         if pretty and version and self.codename():
-            version = "{0} ({1})".format(version, self.codename())
+            version = f"{version} ({self.codename()})"
         return version
 
-    def version_parts(self, best=False):
-        # type: (bool) -> Tuple[str, str, str]
+    def version_parts(self, best: bool = False) -> Tuple[str, str, str]:
         """
         Return the version of the OS distribution, as a tuple of version
         numbers.
@@ -895,8 +935,7 @@ def version_parts(self, best=False):
                 return major, minor or "", build_number or ""
         return "", "", ""
 
-    def major_version(self, best=False):
-        # type: (bool) -> str
+    def major_version(self, best: bool = False) -> str:
         """
         Return the major version number of the current distribution.
 
@@ -904,8 +943,7 @@ def major_version(self, best=False):
         """
         return self.version_parts(best)[0]
 
-    def minor_version(self, best=False):
-        # type: (bool) -> str
+    def minor_version(self, best: bool = False) -> str:
         """
         Return the minor version number of the current distribution.
 
@@ -913,8 +951,7 @@ def minor_version(self, best=False):
         """
         return self.version_parts(best)[1]
 
-    def build_number(self, best=False):
-        # type: (bool) -> str
+    def build_number(self, best: bool = False) -> str:
         """
         Return the build number of the current distribution.
 
@@ -922,8 +959,7 @@ def build_number(self, best=False):
         """
         return self.version_parts(best)[2]
 
-    def like(self):
-        # type: () -> str
+    def like(self) -> str:
         """
         Return the IDs of distributions that are like the OS distribution.
 
@@ -931,8 +967,7 @@ def like(self):
         """
         return self.os_release_attr("id_like") or ""
 
-    def codename(self):
-        # type: () -> str
+    def codename(self) -> str:
         """
         Return the codename of the OS distribution.
 
@@ -949,8 +984,7 @@ def codename(self):
                 or ""
             )
 
-    def info(self, pretty=False, best=False):
-        # type: (bool, bool) -> InfoDict
+    def info(self, pretty: bool = False, best: bool = False) -> InfoDict:
         """
         Return certain machine-readable information about the OS
         distribution.
@@ -969,8 +1003,7 @@ def info(self, pretty=False, best=False):
             codename=self.codename(),
         )
 
-    def os_release_info(self):
-        # type: () -> Dict[str, str]
+    def os_release_info(self) -> Dict[str, str]:
         """
         Return a dictionary containing key-value pairs for the information
         items from the os-release file data source of the OS distribution.
@@ -979,8 +1012,7 @@ def os_release_info(self):
         """
         return self._os_release_info
 
-    def lsb_release_info(self):
-        # type: () -> Dict[str, str]
+    def lsb_release_info(self) -> Dict[str, str]:
         """
         Return a dictionary containing key-value pairs for the information
         items from the lsb_release command data source of the OS
@@ -990,8 +1022,7 @@ def lsb_release_info(self):
         """
         return self._lsb_release_info
 
-    def distro_release_info(self):
-        # type: () -> Dict[str, str]
+    def distro_release_info(self) -> Dict[str, str]:
         """
         Return a dictionary containing key-value pairs for the information
         items from the distro release file data source of the OS
@@ -1001,8 +1032,7 @@ def distro_release_info(self):
         """
         return self._distro_release_info
 
-    def uname_info(self):
-        # type: () -> Dict[str, str]
+    def uname_info(self) -> Dict[str, str]:
         """
         Return a dictionary containing key-value pairs for the information
         items from the uname command data source of the OS distribution.
@@ -1011,8 +1041,13 @@ def uname_info(self):
         """
         return self._uname_info
 
-    def os_release_attr(self, attribute):
-        # type: (str) -> str
+    def oslevel_info(self) -> str:
+        """
+        Return AIX' oslevel command output.
+        """
+        return self._oslevel_info
+
+    def os_release_attr(self, attribute: str) -> str:
         """
         Return a single named information item from the os-release file data
         source of the OS distribution.
@@ -1021,8 +1056,7 @@ def os_release_attr(self, attribute):
         """
         return self._os_release_info.get(attribute, "")
 
-    def lsb_release_attr(self, attribute):
-        # type: (str) -> str
+    def lsb_release_attr(self, attribute: str) -> str:
         """
         Return a single named information item from the lsb_release command
         output data source of the OS distribution.
@@ -1031,8 +1065,7 @@ def lsb_release_attr(self, attribute):
         """
         return self._lsb_release_info.get(attribute, "")
 
-    def distro_release_attr(self, attribute):
-        # type: (str) -> str
+    def distro_release_attr(self, attribute: str) -> str:
         """
         Return a single named information item from the distro release file
         data source of the OS distribution.
@@ -1041,8 +1074,7 @@ def distro_release_attr(self, attribute):
         """
         return self._distro_release_info.get(attribute, "")
 
-    def uname_attr(self, attribute):
-        # type: (str) -> str
+    def uname_attr(self, attribute: str) -> str:
         """
         Return a single named information item from the uname command
         output data source of the OS distribution.
@@ -1052,8 +1084,7 @@ def uname_attr(self, attribute):
         return self._uname_info.get(attribute, "")
 
     @cached_property
-    def _os_release_info(self):
-        # type: () -> Dict[str, str]
+    def _os_release_info(self) -> Dict[str, str]:
         """
         Get the information items from the specified os-release file.
 
@@ -1061,13 +1092,12 @@ def _os_release_info(self):
             A dictionary containing all information items.
         """
         if os.path.isfile(self.os_release_file):
-            with open(self.os_release_file) as release_file:
+            with open(self.os_release_file, encoding="utf-8") as release_file:
                 return self._parse_os_release_content(release_file)
         return {}
 
     @staticmethod
-    def _parse_os_release_content(lines):
-        # type: (TextIO) -> Dict[str, str]
+    def _parse_os_release_content(lines: TextIO) -> Dict[str, str]:
         """
         Parse the lines of an os-release file.
 
@@ -1084,16 +1114,6 @@ def _parse_os_release_content(lines):
         lexer = shlex.shlex(lines, posix=True)
         lexer.whitespace_split = True
 
-        # The shlex module defines its `wordchars` variable using literals,
-        # making it dependent on the encoding of the Python source file.
-        # In Python 2.6 and 2.7, the shlex source file is encoded in
-        # 'iso-8859-1', and the `wordchars` variable is defined as a byte
-        # string. This causes a UnicodeDecodeError to be raised when the
-        # parsed content is a unicode object. The following fix resolves that
-        # (... but it should be fixed in shlex...):
-        if sys.version_info[0] == 2 and isinstance(lexer.wordchars, bytes):
-            lexer.wordchars = lexer.wordchars.decode("iso-8859-1")
-
         tokens = list(lexer)
         for token in tokens:
             # At this point, all shell-like parsing has been done (i.e.
@@ -1102,12 +1122,17 @@ def _parse_os_release_content(lines):
             # stripped, etc.), so the tokens are now either:
             # * variable assignments: var=value
             # * commands or their arguments (not allowed in os-release)
+            # Ignore any tokens that are not variable assignments
             if "=" in token:
                 k, v = token.split("=", 1)
                 props[k.lower()] = v
-            else:
-                # Ignore any tokens that are not variable assignments
-                pass
+
+        if "version" in props:
+            # extract release codename (if any) from version attribute
+            match = re.search(r"\((\D+)\)|,\s*(\D+)", props["version"])
+            if match:
+                release_codename = match.group(1) or match.group(2)
+                props["codename"] = props["release_codename"] = release_codename
 
         if "version_codename" in props:
             # os-release added a version_codename field.  Use that in
@@ -1118,22 +1143,11 @@ def _parse_os_release_content(lines):
         elif "ubuntu_codename" in props:
             # Same as above but a non-standard field name used on older Ubuntus
             props["codename"] = props["ubuntu_codename"]
-        elif "version" in props:
-            # If there is no version_codename, parse it from the version
-            match = re.search(r"(\(\D+\))|,(\s+)?\D+", props["version"])
-            if match:
-                codename = match.group()
-                codename = codename.strip("()")
-                codename = codename.strip(",")
-                codename = codename.strip()
-                # codename appears within paranthese.
-                props["codename"] = codename
 
         return props
 
     @cached_property
-    def _lsb_release_info(self):
-        # type: () -> Dict[str, str]
+    def _lsb_release_info(self) -> Dict[str, str]:
         """
         Get the information items from the lsb_release command output.
 
@@ -1142,19 +1156,17 @@ def _lsb_release_info(self):
         """
         if not self.include_lsb:
             return {}
-        with open(os.devnull, "wb") as devnull:
-            try:
-                cmd = ("lsb_release", "-a")
-                stdout = subprocess.check_output(cmd, stderr=devnull)
-            # Command not found or lsb_release returned error
-            except (OSError, subprocess.CalledProcessError):
-                return {}
+        try:
+            cmd = ("lsb_release", "-a")
+            stdout = subprocess.check_output(cmd, stderr=subprocess.DEVNULL)
+        # Command not found or lsb_release returned error
+        except (OSError, subprocess.CalledProcessError):
+            return {}
         content = self._to_str(stdout).splitlines()
         return self._parse_lsb_release_content(content)
 
     @staticmethod
-    def _parse_lsb_release_content(lines):
-        # type: (Iterable[str]) -> Dict[str, str]
+    def _parse_lsb_release_content(lines: Iterable[str]) -> Dict[str, str]:
         """
         Parse the output of the lsb_release command.
 
@@ -1178,20 +1190,41 @@ def _parse_lsb_release_content(lines):
         return props
 
     @cached_property
-    def _uname_info(self):
-        # type: () -> Dict[str, str]
-        with open(os.devnull, "wb") as devnull:
-            try:
-                cmd = ("uname", "-rs")
-                stdout = subprocess.check_output(cmd, stderr=devnull)
-            except OSError:
-                return {}
+    def _uname_info(self) -> Dict[str, str]:
+        if not self.include_uname:
+            return {}
+        try:
+            cmd = ("uname", "-rs")
+            stdout = subprocess.check_output(cmd, stderr=subprocess.DEVNULL)
+        except OSError:
+            return {}
         content = self._to_str(stdout).splitlines()
         return self._parse_uname_content(content)
 
+    @cached_property
+    def _oslevel_info(self) -> str:
+        if not self.include_oslevel:
+            return ""
+        try:
+            stdout = subprocess.check_output("oslevel", stderr=subprocess.DEVNULL)
+        except (OSError, subprocess.CalledProcessError):
+            return ""
+        return self._to_str(stdout).strip()
+
+    @cached_property
+    def _debian_version(self) -> str:
+        try:
+            with open(
+                os.path.join(self.etc_dir, "debian_version"), encoding="ascii"
+            ) as fp:
+                return fp.readline().rstrip()
+        except FileNotFoundError:
+            return ""
+
     @staticmethod
-    def _parse_uname_content(lines):
-        # type: (Sequence[str]) -> Dict[str, str]
+    def _parse_uname_content(lines: Sequence[str]) -> Dict[str, str]:
+        if not lines:
+            return {}
         props = {}
         match = re.search(r"^([^\s]+)\s+([\d\.]+)", lines[0].strip())
         if match:
@@ -1208,23 +1241,12 @@ def _parse_uname_content(lines):
         return props
 
     @staticmethod
-    def _to_str(text):
-        # type: (Union[bytes, str]) -> str
+    def _to_str(bytestring: bytes) -> str:
         encoding = sys.getfilesystemencoding()
-        encoding = "utf-8" if encoding == "ascii" else encoding
-
-        if sys.version_info[0] >= 3:
-            if isinstance(text, bytes):
-                return text.decode(encoding)
-        else:
-            if isinstance(text, unicode):  # noqa
-                return text.encode(encoding)
-
-        return text
+        return bytestring.decode(encoding)
 
     @cached_property
-    def _distro_release_info(self):
-        # type: () -> Dict[str, str]
+    def _distro_release_info(self) -> Dict[str, str]:
         """
         Get the information items from the specified distro release file.
 
@@ -1241,14 +1263,14 @@ def _distro_release_info(self):
             # file), because we want to use what was specified as best as
             # possible.
             match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
-            if "name" in distro_info and "cloudlinux" in distro_info["name"].lower():
-                distro_info["id"] = "cloudlinux"
-            elif match:
-                distro_info["id"] = match.group(1)
-            return distro_info
         else:
             try:
-                basenames = os.listdir(self.etc_dir)
+                basenames = [
+                    basename
+                    for basename in os.listdir(self.etc_dir)
+                    if basename not in _DISTRO_RELEASE_IGNORE_BASENAMES
+                    and os.path.isfile(os.path.join(self.etc_dir, basename))
+                ]
                 # We sort for repeatability in cases where there are multiple
                 # distro specific files; e.g. CentOS, Oracle, Enterprise all
                 # containing `redhat-release` on top of their own.
@@ -1258,41 +1280,31 @@ def _distro_release_info(self):
                 # sure about the *-release files. Check common entries of
                 # /etc for information. If they turn out to not be there the
                 # error is handled in `_parse_distro_release_file()`.
-                basenames = [
-                    "SuSE-release",
-                    "arch-release",
-                    "base-release",
-                    "centos-release",
-                    "fedora-release",
-                    "gentoo-release",
-                    "mageia-release",
-                    "mandrake-release",
-                    "mandriva-release",
-                    "mandrivalinux-release",
-                    "manjaro-release",
-                    "oracle-release",
-                    "redhat-release",
-                    "sl-release",
-                    "slackware-version",
-                ]
+                basenames = _DISTRO_RELEASE_BASENAMES
             for basename in basenames:
-                if basename in _DISTRO_RELEASE_IGNORE_BASENAMES:
-                    continue
                 match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
-                if match:
-                    filepath = os.path.join(self.etc_dir, basename)
-                    distro_info = self._parse_distro_release_file(filepath)
-                    if "name" in distro_info:
-                        # The name is always present if the pattern matches
-                        self.distro_release_file = filepath
-                        distro_info["id"] = match.group(1)
-                        if "cloudlinux" in distro_info["name"].lower():
-                            distro_info["id"] = "cloudlinux"
-                        return distro_info
-            return {}
+                if match is None:
+                    continue
+                filepath = os.path.join(self.etc_dir, basename)
+                distro_info = self._parse_distro_release_file(filepath)
+                # The name is always present if the pattern matches.
+                if "name" not in distro_info:
+                    continue
+                self.distro_release_file = filepath
+                break
+            else:  # the loop didn't "break": no candidate.
+                return {}
 
-    def _parse_distro_release_file(self, filepath):
-        # type: (str) -> Dict[str, str]
+        if match is not None:
+            distro_info["id"] = match.group(1)
+
+        # CloudLinux < 7: manually enrich info with proper id.
+        if "cloudlinux" in distro_info.get("name", "").lower():
+            distro_info["id"] = "cloudlinux"
+
+        return distro_info
+
+    def _parse_distro_release_file(self, filepath: str) -> Dict[str, str]:
         """
         Parse a distro release file.
 
@@ -1304,19 +1316,18 @@ def _parse_distro_release_file(self, filepath):
             A dictionary containing all information items.
         """
         try:
-            with open(filepath) as fp:
+            with open(filepath, encoding="utf-8") as fp:
                 # Only parse the first line. For instance, on SLES there
                 # are multiple lines. We don't want them...
                 return self._parse_distro_release_content(fp.readline())
-        except (OSError, IOError):
+        except OSError:
             # Ignore not being able to read a specific, seemingly version
             # related file.
             # See https://github.com/python-distro/distro/issues/162
             return {}
 
     @staticmethod
-    def _parse_distro_release_content(line):
-        # type: (str) -> Dict[str, str]
+    def _parse_distro_release_content(line: str) -> Dict[str, str]:
         """
         Parse a line from a distro release file.
 
@@ -1344,8 +1355,7 @@ def _parse_distro_release_content(line):
 _distro = LinuxDistribution()
 
 
-def main():
-    # type: () -> None
+def main() -> None:
     logger = logging.getLogger(__name__)
     logger.setLevel(logging.DEBUG)
     logger.addHandler(logging.StreamHandler(sys.stdout))
@@ -1367,7 +1377,10 @@ def main():
 
     if args.root_dir:
         dist = LinuxDistribution(
-            include_lsb=False, include_uname=False, root_dir=args.root_dir
+            include_lsb=False,
+            include_uname=False,
+            include_oslevel=False,
+            root_dir=args.root_dir,
         )
     else:
         dist = _distro

lib/spack/external/_vendoring/jinja2/__init__.py

@@ -0,0 +1,45 @@
+"""Jinja is a template engine written in pure Python. It provides a
+non-XML syntax that supports inline expressions and an optional
+sandboxed environment.
+"""
+from .bccache import BytecodeCache as BytecodeCache
+from .bccache import FileSystemBytecodeCache as FileSystemBytecodeCache
+from .bccache import MemcachedBytecodeCache as MemcachedBytecodeCache
+from .environment import Environment as Environment
+from .environment import Template as Template
+from .exceptions import TemplateAssertionError as TemplateAssertionError
+from .exceptions import TemplateError as TemplateError
+from .exceptions import TemplateNotFound as TemplateNotFound
+from .exceptions import TemplateRuntimeError as TemplateRuntimeError
+from .exceptions import TemplatesNotFound as TemplatesNotFound
+from .exceptions import TemplateSyntaxError as TemplateSyntaxError
+from .exceptions import UndefinedError as UndefinedError
+from .filters import contextfilter
+from .filters import environmentfilter
+from .filters import evalcontextfilter
+from .loaders import BaseLoader as BaseLoader
+from .loaders import ChoiceLoader as ChoiceLoader
+from .loaders import DictLoader as DictLoader
+from .loaders import FileSystemLoader as FileSystemLoader
+from .loaders import FunctionLoader as FunctionLoader
+from .loaders import ModuleLoader as ModuleLoader
+from .loaders import PackageLoader as PackageLoader
+from .loaders import PrefixLoader as PrefixLoader
+from .runtime import ChainableUndefined as ChainableUndefined
+from .runtime import DebugUndefined as DebugUndefined
+from .runtime import make_logging_undefined as make_logging_undefined
+from .runtime import StrictUndefined as StrictUndefined
+from .runtime import Undefined as Undefined
+from .utils import clear_caches as clear_caches
+from .utils import contextfunction
+from .utils import environmentfunction
+from .utils import escape
+from .utils import evalcontextfunction
+from .utils import is_undefined as is_undefined
+from .utils import Markup
+from .utils import pass_context as pass_context
+from .utils import pass_environment as pass_environment
+from .utils import pass_eval_context as pass_eval_context
+from .utils import select_autoescape as select_autoescape
+
+__version__ = "3.0.3"

lib/spack/external/_vendoring/jinja2/async_utils.py

@@ -0,0 +1,75 @@
+import inspect
+import typing as t
+from functools import wraps
+
+from .utils import _PassArg
+from .utils import pass_eval_context
+
+V = t.TypeVar("V")
+
+
+def async_variant(normal_func):  # type: ignore
+    def decorator(async_func):  # type: ignore
+        pass_arg = _PassArg.from_obj(normal_func)
+        need_eval_context = pass_arg is None
+
+        if pass_arg is _PassArg.environment:
+
+            def is_async(args: t.Any) -> bool:
+                return t.cast(bool, args[0].is_async)
+
+        else:
+
+            def is_async(args: t.Any) -> bool:
+                return t.cast(bool, args[0].environment.is_async)
+
+        @wraps(normal_func)
+        def wrapper(*args, **kwargs):  # type: ignore
+            b = is_async(args)
+
+            if need_eval_context:
+                args = args[1:]
+
+            if b:
+                return async_func(*args, **kwargs)
+
+            return normal_func(*args, **kwargs)
+
+        if need_eval_context:
+            wrapper = pass_eval_context(wrapper)
+
+        wrapper.jinja_async_variant = True
+        return wrapper
+
+    return decorator
+
+
+_common_primitives = {int, float, bool, str, list, dict, tuple, type(None)}
+
+
+async def auto_await(value: t.Union[t.Awaitable["V"], "V"]) -> "V":
+    # Avoid a costly call to isawaitable
+    if type(value) in _common_primitives:
+        return t.cast("V", value)
+
+    if inspect.isawaitable(value):
+        return await t.cast("t.Awaitable[V]", value)
+
+    return t.cast("V", value)
+
+
+async def auto_aiter(
+    iterable: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+) -> "t.AsyncIterator[V]":
+    if hasattr(iterable, "__aiter__"):
+        async for item in t.cast("t.AsyncIterable[V]", iterable):
+            yield item
+    else:
+        for item in t.cast("t.Iterable[V]", iterable):
+            yield item
+
+
+async def auto_to_list(
+    value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+) -> t.List["V"]:
+    return [x async for x in auto_aiter(value)]

lib/spack/external/_vendoring/jinja2/bccache.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 """The optional bytecode cache system. This is useful if you have very
 complex template situations and the compilation of all those templates
 slows down your application too much.
@@ -8,22 +7,30 @@
 """
 import errno
 import fnmatch
+import marshal
 import os
+import pickle
 import stat
 import sys
 import tempfile
+import typing as t
 from hashlib import sha1
-from os import listdir
-from os import path
+from io import BytesIO
+from types import CodeType
 
-from ._compat import BytesIO
-from ._compat import marshal_dump
-from ._compat import marshal_load
-from ._compat import pickle
-from ._compat import text_type
-from .utils import open_if_exists
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .environment import Environment
 
-bc_version = 4
+    class _MemcachedClient(te.Protocol):
+        def get(self, key: str) -> bytes:
+            ...
+
+        def set(self, key: str, value: bytes, timeout: t.Optional[int] = None) -> None:
+            ...
+
+
+bc_version = 5
 # Magic bytes to identify Jinja bytecode cache files. Contains the
 # Python major and minor version to avoid loading incompatible bytecode
 # if a project upgrades its Python version.
@@ -34,7 +41,7 @@
 )
 
 
-class Bucket(object):
+class Bucket:
     """Buckets are used to store the bytecode for one template.  It's created
     and initialized by the bytecode cache and passed to the loading functions.
 
@@ -43,17 +50,17 @@ class Bucket(object):
     cache subclasses don't have to care about cache invalidation.
     """
 
-    def __init__(self, environment, key, checksum):
+    def __init__(self, environment: "Environment", key: str, checksum: str) -> None:
         self.environment = environment
         self.key = key
         self.checksum = checksum
         self.reset()
 
-    def reset(self):
+    def reset(self) -> None:
         """Resets the bucket (unloads the bytecode)."""
-        self.code = None
+        self.code: t.Optional[CodeType] = None
 
-    def load_bytecode(self, f):
+    def load_bytecode(self, f: t.BinaryIO) -> None:
         """Loads bytecode from a file or file like object."""
         # make sure the magic header is correct
         magic = f.read(len(bc_magic))
@@ -67,31 +74,31 @@ def load_bytecode(self, f):
             return
         # if marshal_load fails then we need to reload
         try:
-            self.code = marshal_load(f)
+            self.code = marshal.load(f)
         except (EOFError, ValueError, TypeError):
             self.reset()
             return
 
-    def write_bytecode(self, f):
+    def write_bytecode(self, f: t.BinaryIO) -> None:
         """Dump the bytecode into the file or file like object passed."""
         if self.code is None:
             raise TypeError("can't write empty bucket")
         f.write(bc_magic)
         pickle.dump(self.checksum, f, 2)
-        marshal_dump(self.code, f)
+        marshal.dump(self.code, f)
 
-    def bytecode_from_string(self, string):
-        """Load bytecode from a string."""
+    def bytecode_from_string(self, string: bytes) -> None:
+        """Load bytecode from bytes."""
         self.load_bytecode(BytesIO(string))
 
-    def bytecode_to_string(self):
-        """Return the bytecode as string."""
+    def bytecode_to_string(self) -> bytes:
+        """Return the bytecode as bytes."""
         out = BytesIO()
         self.write_bytecode(out)
         return out.getvalue()
 
 
-class BytecodeCache(object):
+class BytecodeCache:
     """To implement your own bytecode cache you have to subclass this class
     and override :meth:`load_bytecode` and :meth:`dump_bytecode`.  Both of
     these methods are passed a :class:`~jinja2.bccache.Bucket`.
@@ -120,41 +127,48 @@ def dump_bytecode(self, bucket):
     Jinja.
     """
 
-    def load_bytecode(self, bucket):
+    def load_bytecode(self, bucket: Bucket) -> None:
         """Subclasses have to override this method to load bytecode into a
         bucket.  If they are not able to find code in the cache for the
         bucket, it must not do anything.
         """
         raise NotImplementedError()
 
-    def dump_bytecode(self, bucket):
+    def dump_bytecode(self, bucket: Bucket) -> None:
         """Subclasses have to override this method to write the bytecode
         from a bucket back to the cache.  If it unable to do so it must not
         fail silently but raise an exception.
         """
         raise NotImplementedError()
 
-    def clear(self):
+    def clear(self) -> None:
         """Clears the cache.  This method is not used by Jinja but should be
         implemented to allow applications to clear the bytecode cache used
         by a particular environment.
         """
 
-    def get_cache_key(self, name, filename=None):
+    def get_cache_key(
+        self, name: str, filename: t.Optional[t.Union[str]] = None
+    ) -> str:
         """Returns the unique hash key for this template name."""
         hash = sha1(name.encode("utf-8"))
+
         if filename is not None:
-            filename = "|" + filename
-            if isinstance(filename, text_type):
-                filename = filename.encode("utf-8")
-            hash.update(filename)
+            hash.update(f"|{filename}".encode())
+
         return hash.hexdigest()
 
-    def get_source_checksum(self, source):
+    def get_source_checksum(self, source: str) -> str:
         """Returns a checksum for the source."""
         return sha1(source.encode("utf-8")).hexdigest()
 
-    def get_bucket(self, environment, name, filename, source):
+    def get_bucket(
+        self,
+        environment: "Environment",
+        name: str,
+        filename: t.Optional[str],
+        source: str,
+    ) -> Bucket:
         """Return a cache bucket for the given template.  All arguments are
         mandatory but filename may be `None`.
         """
@@ -164,7 +178,7 @@ def get_bucket(self, environment, name, filename, source):
         self.load_bytecode(bucket)
         return bucket
 
-    def set_bucket(self, bucket):
+    def set_bucket(self, bucket: Bucket) -> None:
         """Put the bucket into the cache."""
         self.dump_bytecode(bucket)
 
@@ -187,14 +201,16 @@ class FileSystemBytecodeCache(BytecodeCache):
     This bytecode cache supports clearing of the cache using the clear method.
     """
 
-    def __init__(self, directory=None, pattern="__jinja2_%s.cache"):
+    def __init__(
+        self, directory: t.Optional[str] = None, pattern: str = "__jinja2_%s.cache"
+    ) -> None:
         if directory is None:
             directory = self._get_default_cache_dir()
         self.directory = directory
         self.pattern = pattern
 
-    def _get_default_cache_dir(self):
-        def _unsafe_dir():
+    def _get_default_cache_dir(self) -> str:
+        def _unsafe_dir() -> "te.NoReturn":
             raise RuntimeError(
                 "Cannot determine safe temp directory.  You "
                 "need to explicitly provide one."
@@ -209,7 +225,7 @@ def _unsafe_dir():
         if not hasattr(os, "getuid"):
             _unsafe_dir()
 
-        dirname = "_jinja2-cache-%d" % os.getuid()
+        dirname = f"_jinja2-cache-{os.getuid()}"
         actual_dir = os.path.join(tmpdir, dirname)
 
         try:
@@ -240,34 +256,30 @@ def _unsafe_dir():
 
         return actual_dir
 
-    def _get_cache_filename(self, bucket):
-        return path.join(self.directory, self.pattern % bucket.key)
+    def _get_cache_filename(self, bucket: Bucket) -> str:
+        return os.path.join(self.directory, self.pattern % (bucket.key,))
 
-    def load_bytecode(self, bucket):
-        f = open_if_exists(self._get_cache_filename(bucket), "rb")
-        if f is not None:
-            try:
+    def load_bytecode(self, bucket: Bucket) -> None:
+        filename = self._get_cache_filename(bucket)
+
+        if os.path.exists(filename):
+            with open(filename, "rb") as f:
                 bucket.load_bytecode(f)
-            finally:
-                f.close()
 
-    def dump_bytecode(self, bucket):
-        f = open(self._get_cache_filename(bucket), "wb")
-        try:
+    def dump_bytecode(self, bucket: Bucket) -> None:
+        with open(self._get_cache_filename(bucket), "wb") as f:
             bucket.write_bytecode(f)
-        finally:
-            f.close()
 
-    def clear(self):
+    def clear(self) -> None:
         # imported lazily here because google app-engine doesn't support
         # write access on the file system and the function does not exist
         # normally.
         from os import remove
 
-        files = fnmatch.filter(listdir(self.directory), self.pattern % "*")
+        files = fnmatch.filter(os.listdir(self.directory), self.pattern % ("*",))
         for filename in files:
             try:
-                remove(path.join(self.directory, filename))
+                remove(os.path.join(self.directory, filename))
             except OSError:
                 pass
 
@@ -284,7 +296,7 @@ class MemcachedBytecodeCache(BytecodeCache):
     -   `python-memcached <https://pypi.org/project/python-memcached/>`_
 
     (Unfortunately the django cache interface is not compatible because it
-    does not support storing binary data, only unicode.  You can however pass
+    does not support storing binary data, only text. You can however pass
     the underlying cache client to the bytecode cache which is available
     as `django.core.cache.cache._client`.)
 
@@ -319,32 +331,34 @@ class MemcachedBytecodeCache(BytecodeCache):
 
     def __init__(
         self,
-        client,
-        prefix="jinja2/bytecode/",
-        timeout=None,
-        ignore_memcache_errors=True,
+        client: "_MemcachedClient",
+        prefix: str = "jinja2/bytecode/",
+        timeout: t.Optional[int] = None,
+        ignore_memcache_errors: bool = True,
     ):
         self.client = client
         self.prefix = prefix
         self.timeout = timeout
         self.ignore_memcache_errors = ignore_memcache_errors
 
-    def load_bytecode(self, bucket):
+    def load_bytecode(self, bucket: Bucket) -> None:
         try:
             code = self.client.get(self.prefix + bucket.key)
         except Exception:
             if not self.ignore_memcache_errors:
                 raise
-            code = None
-        if code is not None:
+        else:
             bucket.bytecode_from_string(code)
 
-    def dump_bytecode(self, bucket):
-        args = (self.prefix + bucket.key, bucket.bytecode_to_string())
-        if self.timeout is not None:
-            args += (self.timeout,)
+    def dump_bytecode(self, bucket: Bucket) -> None:
+        key = self.prefix + bucket.key
+        value = bucket.bytecode_to_string()
+
         try:
-            self.client.set(*args)
+            if self.timeout is not None:
+                self.client.set(key, value, self.timeout)
+            else:
+                self.client.set(key, value)
         except Exception:
             if not self.ignore_memcache_errors:
                 raise

lib/spack/external/_vendoring/jinja2/constants.py

@@ -1,6 +1,5 @@
-# -*- coding: utf-8 -*-
 #: list of lorem ipsum words used by the lipsum() helper function
-LOREM_IPSUM_WORDS = u"""\
+LOREM_IPSUM_WORDS = """\
 a ac accumsan ad adipiscing aenean aliquam aliquet amet ante aptent arcu at
 auctor augue bibendum blandit class commodo condimentum congue consectetuer
 consequat conubia convallis cras cubilia cum curabitur curae cursus dapibus

lib/spack/external/_vendoring/jinja2/debug.py

@@ -1,38 +1,38 @@
+import platform
 import sys
+import typing as t
 from types import CodeType
+from types import TracebackType
 
-from . import TemplateSyntaxError
-from ._compat import PYPY
+from .exceptions import TemplateSyntaxError
 from .utils import internal_code
 from .utils import missing
 
+if t.TYPE_CHECKING:
+    from .runtime import Context
 
-def rewrite_traceback_stack(source=None):
+
+def rewrite_traceback_stack(source: t.Optional[str] = None) -> BaseException:
     """Rewrite the current exception to replace any tracebacks from
     within compiled template code with tracebacks that look like they
     came from the template source.
 
     This must be called within an ``except`` block.
 
-    :param exc_info: A :meth:`sys.exc_info` tuple. If not provided,
-        the current ``exc_info`` is used.
     :param source: For ``TemplateSyntaxError``, the original source if
         known.
-    :return: A :meth:`sys.exc_info` tuple that can be re-raised.
+    :return: The original exception with the rewritten traceback.
     """
-    exc_type, exc_value, tb = sys.exc_info()
+    _, exc_value, tb = sys.exc_info()
+    exc_value = t.cast(BaseException, exc_value)
+    tb = t.cast(TracebackType, tb)
 
     if isinstance(exc_value, TemplateSyntaxError) and not exc_value.translated:
         exc_value.translated = True
         exc_value.source = source
-
-        try:
-            # Remove the old traceback on Python 3, otherwise the frames
-            # from the compiler still show up.
-            exc_value.with_traceback(None)
-        except AttributeError:
-            pass
-
+        # Remove the old traceback, otherwise the frames from the
+        # compiler still show up.
+        exc_value.with_traceback(None)
         # Outside of runtime, so the frame isn't executing template
         # code, but it still needs to point at the template.
         tb = fake_traceback(
@@ -70,10 +70,12 @@ def rewrite_traceback_stack(source=None):
     for tb in reversed(stack):
         tb_next = tb_set_next(tb, tb_next)
 
-    return exc_type, exc_value, tb_next
+    return exc_value.with_traceback(tb_next)
 
 
-def fake_traceback(exc_value, tb, filename, lineno):
+def fake_traceback(  # type: ignore
+    exc_value: BaseException, tb: t.Optional[TracebackType], filename: str, lineno: int
+) -> TracebackType:
     """Produce a new traceback object that looks like it came from the
     template source instead of the compiled code. The filename, line
     number, and location name will point to the template, and the local
@@ -100,79 +102,60 @@ def fake_traceback(exc_value, tb, filename, lineno):
         "__jinja_exception__": exc_value,
     }
     # Raise an exception at the correct line number.
-    code = compile("\n" * (lineno - 1) + "raise __jinja_exception__", filename, "exec")
+    code: CodeType = compile(
+        "\n" * (lineno - 1) + "raise __jinja_exception__", filename, "exec"
+    )
 
     # Build a new code object that points to the template file and
     # replaces the location with a block name.
-    try:
-        location = "template"
+    location = "template"
 
-        if tb is not None:
-            function = tb.tb_frame.f_code.co_name
+    if tb is not None:
+        function = tb.tb_frame.f_code.co_name
 
-            if function == "root":
-                location = "top-level template code"
-            elif function.startswith("block_"):
-                location = 'block "%s"' % function[6:]
+        if function == "root":
+            location = "top-level template code"
+        elif function.startswith("block_"):
+            location = f"block {function[6:]!r}"
 
-        # Collect arguments for the new code object. CodeType only
-        # accepts positional arguments, and arguments were inserted in
-        # new Python versions.
-        code_args = []
-
-        for attr in (
-            "argcount",
-            "posonlyargcount",  # Python 3.8
-            "kwonlyargcount",  # Python 3
-            "nlocals",
-            "stacksize",
-            "flags",
-            "code",  # codestring
-            "consts",  # constants
-            "names",
-            "varnames",
-            ("filename", filename),
-            ("name", location),
-            "firstlineno",
-            "lnotab",
-            "freevars",
-            "cellvars",
-        ):
-            if isinstance(attr, tuple):
-                # Replace with given value.
-                code_args.append(attr[1])
-                continue
-
-            try:
-                # Copy original value if it exists.
-                code_args.append(getattr(code, "co_" + attr))
-            except AttributeError:
-                # Some arguments were added later.
-                continue
-
-        code = CodeType(*code_args)
-    except Exception:
-        # Some environments such as Google App Engine don't support
-        # modifying code objects.
-        pass
+    if sys.version_info >= (3, 8):
+        code = code.replace(co_name=location)
+    else:
+        code = CodeType(
+            code.co_argcount,
+            code.co_kwonlyargcount,
+            code.co_nlocals,
+            code.co_stacksize,
+            code.co_flags,
+            code.co_code,
+            code.co_consts,
+            code.co_names,
+            code.co_varnames,
+            code.co_filename,
+            location,
+            code.co_firstlineno,
+            code.co_lnotab,
+            code.co_freevars,
+            code.co_cellvars,
+        )
 
     # Execute the new code, which is guaranteed to raise, and return
     # the new traceback without this frame.
     try:
         exec(code, globals, locals)
     except BaseException:
-        return sys.exc_info()[2].tb_next
+        return sys.exc_info()[2].tb_next  # type: ignore
 
 
-def get_template_locals(real_locals):
+def get_template_locals(real_locals: t.Mapping[str, t.Any]) -> t.Dict[str, t.Any]:
     """Based on the runtime locals, get the context that would be
     available at that point in the template.
     """
     # Start with the current template context.
-    ctx = real_locals.get("context")
+    ctx: "t.Optional[Context]" = real_locals.get("context")
 
-    if ctx:
-        data = ctx.get_all().copy()
+    if ctx is not None:
+        data: t.Dict[str, t.Any] = ctx.get_all().copy()
     else:
         data = {}
 
@@ -180,7 +163,7 @@ def get_template_locals(real_locals):
     # rather than pushing a context. Local variables follow the scheme
     # l_depth_name. Find the highest-depth local that has a value for
     # each name.
-    local_overrides = {}
+    local_overrides: t.Dict[str, t.Tuple[int, t.Any]] = {}
 
     for name, value in real_locals.items():
         if not name.startswith("l_") or value is missing:
@@ -188,8 +171,8 @@ def get_template_locals(real_locals):
             continue
 
         try:
-            _, depth, name = name.split("_", 2)
-            depth = int(depth)
+            _, depth_str, name = name.split("_", 2)
+            depth = int(depth_str)
         except ValueError:
             continue
 
@@ -210,31 +193,37 @@ def get_template_locals(real_locals):
 
 if sys.version_info >= (3, 7):
     # tb_next is directly assignable as of Python 3.7
-    def tb_set_next(tb, tb_next):
+    def tb_set_next(
+        tb: TracebackType, tb_next: t.Optional[TracebackType]
+    ) -> TracebackType:
         tb.tb_next = tb_next
         return tb
 
 
-elif PYPY:
+elif platform.python_implementation() == "PyPy":
     # PyPy might have special support, and won't work with ctypes.
     try:
-        import tputil
+        import tputil  # type: ignore
     except ImportError:
         # Without tproxy support, use the original traceback.
-        def tb_set_next(tb, tb_next):
+        def tb_set_next(
+            tb: TracebackType, tb_next: t.Optional[TracebackType]
+        ) -> TracebackType:
             return tb
 
     else:
         # With tproxy support, create a proxy around the traceback that
         # returns the new tb_next.
-        def tb_set_next(tb, tb_next):
-            def controller(op):
+        def tb_set_next(
+            tb: TracebackType, tb_next: t.Optional[TracebackType]
+        ) -> TracebackType:
+            def controller(op):  # type: ignore
                 if op.opname == "__getattribute__" and op.args[0] == "tb_next":
                     return tb_next
 
                 return op.delegate()
 
-            return tputil.make_proxy(controller, obj=tb)
+            return tputil.make_proxy(controller, obj=tb)  # type: ignore
 
 
 else:
@@ -250,7 +239,9 @@ class _CTraceback(ctypes.Structure):
             ("tb_next", ctypes.py_object),
         ]
 
-    def tb_set_next(tb, tb_next):
+    def tb_set_next(
+        tb: TracebackType, tb_next: t.Optional[TracebackType]
+    ) -> TracebackType:
         c_tb = _CTraceback.from_address(id(tb))
 
         # Clear out the old tb_next.

lib/spack/external/_vendoring/jinja2/defaults.py

@@ -1,5 +1,5 @@
-# -*- coding: utf-8 -*-
-from ._compat import range_type
+import typing as t
+
 from .filters import FILTERS as DEFAULT_FILTERS  # noqa: F401
 from .tests import TESTS as DEFAULT_TESTS  # noqa: F401
 from .utils import Cycler
@@ -7,6 +7,9 @@
 from .utils import Joiner
 from .utils import Namespace
 
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+
 # defaults for the parser / lexer
 BLOCK_START_STRING = "{%"
 BLOCK_END_STRING = "%}"
@@ -14,17 +17,17 @@
 VARIABLE_END_STRING = "}}"
 COMMENT_START_STRING = "{#"
 COMMENT_END_STRING = "#}"
-LINE_STATEMENT_PREFIX = None
-LINE_COMMENT_PREFIX = None
+LINE_STATEMENT_PREFIX: t.Optional[str] = None
+LINE_COMMENT_PREFIX: t.Optional[str] = None
 TRIM_BLOCKS = False
 LSTRIP_BLOCKS = False
-NEWLINE_SEQUENCE = "\n"
+NEWLINE_SEQUENCE: "te.Literal['\\n', '\\r\\n', '\\r']" = "\n"
 KEEP_TRAILING_NEWLINE = False
 
 # default filters, tests and namespace
 
 DEFAULT_NAMESPACE = {
-    "range": range_type,
+    "range": range,
     "dict": dict,
     "lipsum": generate_lorem_ipsum,
     "cycler": Cycler,
@@ -33,10 +36,11 @@
 }
 
 # default policies
-DEFAULT_POLICIES = {
+DEFAULT_POLICIES: t.Dict[str, t.Any] = {
     "compiler.ascii_str": True,
     "urlize.rel": "noopener",
     "urlize.target": None,
+    "urlize.extra_schemes": None,
     "truncate.leeway": 5,
     "json.dumps_function": None,
     "json.dumps_kwargs": {"sort_keys": True},

lib/spack/external/_vendoring/jinja2/exceptions.py

@@ -1,44 +1,20 @@
-# -*- coding: utf-8 -*-
-from ._compat import imap
-from ._compat import implements_to_string
-from ._compat import PY2
-from ._compat import text_type
+import typing as t
+
+if t.TYPE_CHECKING:
+    from .runtime import Undefined
 
 
 class TemplateError(Exception):
     """Baseclass for all template errors."""
 
-    if PY2:
+    def __init__(self, message: t.Optional[str] = None) -> None:
+        super().__init__(message)
 
-        def __init__(self, message=None):
-            if message is not None:
-                message = text_type(message).encode("utf-8")
-            Exception.__init__(self, message)
-
-        @property
-        def message(self):
-            if self.args:
-                message = self.args[0]
-                if message is not None:
-                    return message.decode("utf-8", "replace")
-
-        def __unicode__(self):
-            return self.message or u""
-
-    else:
-
-        def __init__(self, message=None):
-            Exception.__init__(self, message)
-
-        @property
-        def message(self):
-            if self.args:
-                message = self.args[0]
-                if message is not None:
-                    return message
+    @property
+    def message(self) -> t.Optional[str]:
+        return self.args[0] if self.args else None
 
 
-@implements_to_string
 class TemplateNotFound(IOError, LookupError, TemplateError):
     """Raised if a template does not exist.
 
@@ -47,11 +23,15 @@ class TemplateNotFound(IOError, LookupError, TemplateError):
         provided, an :exc:`UndefinedError` is raised.
     """
 
-    # looks weird, but removes the warning descriptor that just
-    # bogusly warns us about message being deprecated
-    message = None
+    # Silence the Python warning about message being deprecated since
+    # it's not valid here.
+    message: t.Optional[str] = None
 
-    def __init__(self, name, message=None):
+    def __init__(
+        self,
+        name: t.Optional[t.Union[str, "Undefined"]],
+        message: t.Optional[str] = None,
+    ) -> None:
         IOError.__init__(self, name)
 
         if message is None:
@@ -66,8 +46,8 @@ def __init__(self, name, message=None):
         self.name = name
         self.templates = [name]
 
-    def __str__(self):
-        return self.message
+    def __str__(self) -> str:
+        return str(self.message)
 
 
 class TemplatesNotFound(TemplateNotFound):
@@ -82,7 +62,11 @@ class TemplatesNotFound(TemplateNotFound):
     .. versionadded:: 2.2
     """
 
-    def __init__(self, names=(), message=None):
+    def __init__(
+        self,
+        names: t.Sequence[t.Union[str, "Undefined"]] = (),
+        message: t.Optional[str] = None,
+    ) -> None:
         if message is None:
             from .runtime import Undefined
 
@@ -94,52 +78,57 @@ def __init__(self, names=(), message=None):
                 else:
                     parts.append(name)
 
-            message = u"none of the templates given were found: " + u", ".join(
-                imap(text_type, parts)
-            )
-        TemplateNotFound.__init__(self, names and names[-1] or None, message)
+            parts_str = ", ".join(map(str, parts))
+            message = f"none of the templates given were found: {parts_str}"
+
+        super().__init__(names[-1] if names else None, message)
         self.templates = list(names)
 
 
-@implements_to_string
 class TemplateSyntaxError(TemplateError):
     """Raised to tell the user that there is a problem with the template."""
 
-    def __init__(self, message, lineno, name=None, filename=None):
-        TemplateError.__init__(self, message)
+    def __init__(
+        self,
+        message: str,
+        lineno: int,
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+    ) -> None:
+        super().__init__(message)
         self.lineno = lineno
         self.name = name
         self.filename = filename
-        self.source = None
+        self.source: t.Optional[str] = None
 
         # this is set to True if the debug.translate_syntax_error
         # function translated the syntax error into a new traceback
         self.translated = False
 
-    def __str__(self):
+    def __str__(self) -> str:
         # for translated errors we only return the message
         if self.translated:
-            return self.message
+            return t.cast(str, self.message)
 
         # otherwise attach some stuff
-        location = "line %d" % self.lineno
+        location = f"line {self.lineno}"
         name = self.filename or self.name
         if name:
-            location = 'File "%s", %s' % (name, location)
-        lines = [self.message, "  " + location]
+            location = f'File "{name}", {location}'
+        lines = [t.cast(str, self.message), "  " + location]
 
         # if the source is set, add the line to the output
         if self.source is not None:
             try:
                 line = self.source.splitlines()[self.lineno - 1]
             except IndexError:
-                line = None
-            if line:
+                pass
+            else:
                 lines.append("    " + line.strip())
 
-        return u"\n".join(lines)
+        return "\n".join(lines)
 
-    def __reduce__(self):
+    def __reduce__(self):  # type: ignore
         # https://bugs.python.org/issue1692335 Exceptions that take
         # multiple required arguments have problems with pickling.
         # Without this, raises TypeError: __init__() missing 1 required

lib/spack/external/_vendoring/jinja2/ext.py

@@ -1,53 +1,58 @@
-# -*- coding: utf-8 -*-
 """Extension API for adding custom tags and behavior."""
 import pprint
 import re
-from sys import version_info
+import typing as t
+import warnings
 
 from markupsafe import Markup
 
+from . import defaults
 from . import nodes
-from ._compat import iteritems
-from ._compat import string_types
-from ._compat import with_metaclass
-from .defaults import BLOCK_END_STRING
-from .defaults import BLOCK_START_STRING
-from .defaults import COMMENT_END_STRING
-from .defaults import COMMENT_START_STRING
-from .defaults import KEEP_TRAILING_NEWLINE
-from .defaults import LINE_COMMENT_PREFIX
-from .defaults import LINE_STATEMENT_PREFIX
-from .defaults import LSTRIP_BLOCKS
-from .defaults import NEWLINE_SEQUENCE
-from .defaults import TRIM_BLOCKS
-from .defaults import VARIABLE_END_STRING
-from .defaults import VARIABLE_START_STRING
 from .environment import Environment
 from .exceptions import TemplateAssertionError
 from .exceptions import TemplateSyntaxError
-from .nodes import ContextReference
-from .runtime import concat
-from .utils import contextfunction
+from .runtime import concat  # type: ignore
+from .runtime import Context
+from .runtime import Undefined
 from .utils import import_string
+from .utils import pass_context
 
-# the only real useful gettext functions for a Jinja template.  Note
-# that ugettext must be assigned to gettext as Jinja doesn't support
-# non unicode strings.
-GETTEXT_FUNCTIONS = ("_", "gettext", "ngettext")
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .lexer import Token
+    from .lexer import TokenStream
+    from .parser import Parser
 
+    class _TranslationsBasic(te.Protocol):
+        def gettext(self, message: str) -> str:
+            ...
+
+        def ngettext(self, singular: str, plural: str, n: int) -> str:
+            pass
+
+    class _TranslationsContext(_TranslationsBasic):
+        def pgettext(self, context: str, message: str) -> str:
+            ...
+
+        def npgettext(self, context: str, singular: str, plural: str, n: int) -> str:
+            ...
+
+    _SupportedTranslations = t.Union[_TranslationsBasic, _TranslationsContext]
+
+
+# I18N functions available in Jinja templates. If the I18N library
+# provides ugettext, it will be assigned to gettext.
+GETTEXT_FUNCTIONS: t.Tuple[str, ...] = (
+    "_",
+    "gettext",
+    "ngettext",
+    "pgettext",
+    "npgettext",
+)
 _ws_re = re.compile(r"\s*\n\s*")
 
 
-class ExtensionRegistry(type):
-    """Gives the extension an unique identifier."""
-
-    def __new__(mcs, name, bases, d):
-        rv = type.__new__(mcs, name, bases, d)
-        rv.identifier = rv.__module__ + "." + rv.__name__
-        return rv
-
-
-class Extension(with_metaclass(ExtensionRegistry, object)):
+class Extension:
     """Extensions can be used to add extra functionality to the Jinja template
     system at the parser level.  Custom extensions are bound to an environment
     but may not store environment specific data on `self`.  The reason for
@@ -66,8 +71,13 @@ class Extension(with_metaclass(ExtensionRegistry, object)):
     name as includes the name of the extension (fragment cache).
     """
 
+    identifier: t.ClassVar[str]
+
+    def __init_subclass__(cls) -> None:
+        cls.identifier = f"{cls.__module__}.{cls.__name__}"
+
     #: if this extension parses this is the list of tags it's listening to.
-    tags = set()
+    tags: t.Set[str] = set()
 
     #: the priority of that extension.  This is especially useful for
     #: extensions that preprocess values.  A lower value means higher
@@ -76,24 +86,28 @@ class Extension(with_metaclass(ExtensionRegistry, object)):
     #: .. versionadded:: 2.4
     priority = 100
 
-    def __init__(self, environment):
+    def __init__(self, environment: Environment) -> None:
         self.environment = environment
 
-    def bind(self, environment):
+    def bind(self, environment: Environment) -> "Extension":
         """Create a copy of this extension bound to another environment."""
-        rv = object.__new__(self.__class__)
+        rv = t.cast(Extension, object.__new__(self.__class__))
         rv.__dict__.update(self.__dict__)
         rv.environment = environment
         return rv
 
-    def preprocess(self, source, name, filename=None):
+    def preprocess(
+        self, source: str, name: t.Optional[str], filename: t.Optional[str] = None
+    ) -> str:
         """This method is called before the actual lexing and can be used to
         preprocess the source.  The `filename` is optional.  The return value
         must be the preprocessed source.
         """
         return source
 
-    def filter_stream(self, stream):
+    def filter_stream(
+        self, stream: "TokenStream"
+    ) -> t.Union["TokenStream", t.Iterable["Token"]]:
         """It's passed a :class:`~jinja2.lexer.TokenStream` that can be used
         to filter tokens returned.  This method has to return an iterable of
         :class:`~jinja2.lexer.Token`\\s, but it doesn't have to return a
@@ -101,7 +115,7 @@ def filter_stream(self, stream):
         """
         return stream
 
-    def parse(self, parser):
+    def parse(self, parser: "Parser") -> t.Union[nodes.Node, t.List[nodes.Node]]:
         """If any of the :attr:`tags` matched this method is called with the
         parser as first argument.  The token the parser stream is pointing at
         is the name token that matched.  This method has to return one or a
@@ -109,7 +123,9 @@ def parse(self, parser):
         """
         raise NotImplementedError()
 
-    def attr(self, name, lineno=None):
+    def attr(
+        self, name: str, lineno: t.Optional[int] = None
+    ) -> nodes.ExtensionAttribute:
         """Return an attribute node for the current extension.  This is useful
         to pass constants on extensions to generated template code.
 
@@ -120,8 +136,14 @@ def attr(self, name, lineno=None):
         return nodes.ExtensionAttribute(self.identifier, name, lineno=lineno)
 
     def call_method(
-        self, name, args=None, kwargs=None, dyn_args=None, dyn_kwargs=None, lineno=None
-    ):
+        self,
+        name: str,
+        args: t.Optional[t.List[nodes.Expr]] = None,
+        kwargs: t.Optional[t.List[nodes.Keyword]] = None,
+        dyn_args: t.Optional[nodes.Expr] = None,
+        dyn_kwargs: t.Optional[nodes.Expr] = None,
+        lineno: t.Optional[int] = None,
+    ) -> nodes.Call:
         """Call a method of the extension.  This is a shortcut for
         :meth:`attr` + :class:`jinja2.nodes.Call`.
         """
@@ -139,38 +161,88 @@ def call_method(
         )
 
 
-@contextfunction
-def _gettext_alias(__context, *args, **kwargs):
+@pass_context
+def _gettext_alias(
+    __context: Context, *args: t.Any, **kwargs: t.Any
+) -> t.Union[t.Any, Undefined]:
     return __context.call(__context.resolve("gettext"), *args, **kwargs)
 
 
-def _make_new_gettext(func):
-    @contextfunction
-    def gettext(__context, __string, **variables):
+def _make_new_gettext(func: t.Callable[[str], str]) -> t.Callable[..., str]:
+    @pass_context
+    def gettext(__context: Context, __string: str, **variables: t.Any) -> str:
         rv = __context.call(func, __string)
         if __context.eval_ctx.autoescape:
             rv = Markup(rv)
         # Always treat as a format string, even if there are no
         # variables. This makes translation strings more consistent
         # and predictable. This requires escaping
-        return rv % variables
+        return rv % variables  # type: ignore
 
     return gettext
 
 
-def _make_new_ngettext(func):
-    @contextfunction
-    def ngettext(__context, __singular, __plural, __num, **variables):
+def _make_new_ngettext(func: t.Callable[[str, str, int], str]) -> t.Callable[..., str]:
+    @pass_context
+    def ngettext(
+        __context: Context,
+        __singular: str,
+        __plural: str,
+        __num: int,
+        **variables: t.Any,
+    ) -> str:
         variables.setdefault("num", __num)
         rv = __context.call(func, __singular, __plural, __num)
         if __context.eval_ctx.autoescape:
             rv = Markup(rv)
         # Always treat as a format string, see gettext comment above.
-        return rv % variables
+        return rv % variables  # type: ignore
 
     return ngettext
 
 
+def _make_new_pgettext(func: t.Callable[[str, str], str]) -> t.Callable[..., str]:
+    @pass_context
+    def pgettext(
+        __context: Context, __string_ctx: str, __string: str, **variables: t.Any
+    ) -> str:
+        variables.setdefault("context", __string_ctx)
+        rv = __context.call(func, __string_ctx, __string)
+
+        if __context.eval_ctx.autoescape:
+            rv = Markup(rv)
+
+        # Always treat as a format string, see gettext comment above.
+        return rv % variables  # type: ignore
+
+    return pgettext
+
+
+def _make_new_npgettext(
+    func: t.Callable[[str, str, str, int], str]
+) -> t.Callable[..., str]:
+    @pass_context
+    def npgettext(
+        __context: Context,
+        __string_ctx: str,
+        __singular: str,
+        __plural: str,
+        __num: int,
+        **variables: t.Any,
+    ) -> str:
+        variables.setdefault("context", __string_ctx)
+        variables.setdefault("num", __num)
+        rv = __context.call(func, __string_ctx, __singular, __plural, __num)
+
+        if __context.eval_ctx.autoescape:
+            rv = Markup(rv)
+
+        # Always treat as a format string, see gettext comment above.
+        return rv % variables  # type: ignore
+
+    return npgettext
+
+
 class InternationalizationExtension(Extension):
     """This extension adds gettext support to Jinja."""
 
@@ -183,8 +255,8 @@ class InternationalizationExtension(Extension):
     # something is called twice here.  One time for the gettext value and
     # the other time for the n-parameter of the ngettext function.
 
-    def __init__(self, environment):
-        Extension.__init__(self, environment)
+    def __init__(self, environment: Environment) -> None:
+        super().__init__(environment)
         environment.globals["_"] = _gettext_alias
         environment.extend(
             install_gettext_translations=self._install,
@@ -195,38 +267,92 @@ def __init__(self, environment):
             newstyle_gettext=False,
         )
 
-    def _install(self, translations, newstyle=None):
+    def _install(
+        self, translations: "_SupportedTranslations", newstyle: t.Optional[bool] = None
+    ) -> None:
+        # ugettext and ungettext are preferred in case the I18N library
+        # is providing compatibility with older Python versions.
         gettext = getattr(translations, "ugettext", None)
         if gettext is None:
             gettext = translations.gettext
         ngettext = getattr(translations, "ungettext", None)
         if ngettext is None:
             ngettext = translations.ngettext
-        self._install_callables(gettext, ngettext, newstyle)
 
-    def _install_null(self, newstyle=None):
+        pgettext = getattr(translations, "pgettext", None)
+        npgettext = getattr(translations, "npgettext", None)
         self._install_callables(
-            lambda x: x, lambda s, p, n: (n != 1 and (p,) or (s,))[0], newstyle
+            gettext, ngettext, newstyle=newstyle, pgettext=pgettext, npgettext=npgettext
         )
 
-    def _install_callables(self, gettext, ngettext, newstyle=None):
+    def _install_null(self, newstyle: t.Optional[bool] = None) -> None:
+        import gettext
+
+        translations = gettext.NullTranslations()
+
+        if hasattr(translations, "pgettext"):
+            # Python < 3.8
+            pgettext = translations.pgettext  # type: ignore
+        else:
+
+            def pgettext(c: str, s: str) -> str:
+                return s
+
+        if hasattr(translations, "npgettext"):
+            npgettext = translations.npgettext  # type: ignore
+        else:
+
+            def npgettext(c: str, s: str, p: str, n: int) -> str:
+                return s if n == 1 else p
+
+        self._install_callables(
+            gettext=translations.gettext,
+            ngettext=translations.ngettext,
+            newstyle=newstyle,
+            pgettext=pgettext,
+            npgettext=npgettext,
+        )
+
+    def _install_callables(
+        self,
+        gettext: t.Callable[[str], str],
+        ngettext: t.Callable[[str, str, int], str],
+        newstyle: t.Optional[bool] = None,
+        pgettext: t.Optional[t.Callable[[str, str], str]] = None,
+        npgettext: t.Optional[t.Callable[[str, str, str, int], str]] = None,
+    ) -> None:
         if newstyle is not None:
-            self.environment.newstyle_gettext = newstyle
-        if self.environment.newstyle_gettext:
+            self.environment.newstyle_gettext = newstyle  # type: ignore
+        if self.environment.newstyle_gettext:  # type: ignore
             gettext = _make_new_gettext(gettext)
             ngettext = _make_new_ngettext(ngettext)
-        self.environment.globals.update(gettext=gettext, ngettext=ngettext)
 
-    def _uninstall(self, translations):
-        for key in "gettext", "ngettext":
+            if pgettext is not None:
+                pgettext = _make_new_pgettext(pgettext)
+
+            if npgettext is not None:
+                npgettext = _make_new_npgettext(npgettext)
+
+        self.environment.globals.update(
+            gettext=gettext, ngettext=ngettext, pgettext=pgettext, npgettext=npgettext
+        )
+
+    def _uninstall(self, translations: "_SupportedTranslations") -> None:
+        for key in ("gettext", "ngettext", "pgettext", "npgettext"):
             self.environment.globals.pop(key, None)
 
-    def _extract(self, source, gettext_functions=GETTEXT_FUNCTIONS):
-        if isinstance(source, string_types):
+    def _extract(
+        self,
+        source: t.Union[str, nodes.Template],
+        gettext_functions: t.Sequence[str] = GETTEXT_FUNCTIONS,
+    ) -> t.Iterator[
+        t.Tuple[int, str, t.Union[t.Optional[str], t.Tuple[t.Optional[str], ...]]]
+    ]:
+        if isinstance(source, str):
             source = self.environment.parse(source)
         return extract_from_ast(source, gettext_functions)
 
-    def parse(self, parser):
+    def parse(self, parser: "Parser") -> t.Union[nodes.Node, t.List[nodes.Node]]:
         """Parse a translatable tag."""
         lineno = next(parser.stream).lineno
         num_called_num = False
@@ -234,9 +360,9 @@ def parse(self, parser):
         # find all the variables referenced.  Additionally a variable can be
         # defined in the body of the trans block too, but this is checked at
         # a later state.
-        plural_expr = None
-        plural_expr_assignment = None
-        variables = {}
+        plural_expr: t.Optional[nodes.Expr] = None
+        plural_expr_assignment: t.Optional[nodes.Assign] = None
+        variables: t.Dict[str, nodes.Expr] = {}
         trimmed = None
         while parser.stream.current.type != "block_end":
             if variables:
@@ -246,34 +372,34 @@ def parse(self, parser):
             if parser.stream.skip_if("colon"):
                 break
 
-            name = parser.stream.expect("name")
-            if name.value in variables:
+            token = parser.stream.expect("name")
+            if token.value in variables:
                 parser.fail(
-                    "translatable variable %r defined twice." % name.value,
-                    name.lineno,
+                    f"translatable variable {token.value!r} defined twice.",
+                    token.lineno,
                     exc=TemplateAssertionError,
                 )
 
             # expressions
             if parser.stream.current.type == "assign":
                 next(parser.stream)
-                variables[name.value] = var = parser.parse_expression()
-            elif trimmed is None and name.value in ("trimmed", "notrimmed"):
-                trimmed = name.value == "trimmed"
+                variables[token.value] = var = parser.parse_expression()
+            elif trimmed is None and token.value in ("trimmed", "notrimmed"):
+                trimmed = token.value == "trimmed"
                 continue
             else:
-                variables[name.value] = var = nodes.Name(name.value, "load")
+                variables[token.value] = var = nodes.Name(token.value, "load")
 
             if plural_expr is None:
                 if isinstance(var, nodes.Call):
                     plural_expr = nodes.Name("_trans", "load")
-                    variables[name.value] = plural_expr
+                    variables[token.value] = plural_expr
                     plural_expr_assignment = nodes.Assign(
                         nodes.Name("_trans", "store"), var
                     )
                 else:
                     plural_expr = var
-                num_called_num = name.value == "num"
+                num_called_num = token.value == "num"
 
         parser.stream.expect("block_end")
 
@@ -294,15 +420,15 @@ def parse(self, parser):
             have_plural = True
             next(parser.stream)
             if parser.stream.current.type != "block_end":
-                name = parser.stream.expect("name")
-                if name.value not in variables:
+                token = parser.stream.expect("name")
+                if token.value not in variables:
                     parser.fail(
-                        "unknown variable %r for pluralization" % name.value,
-                        name.lineno,
+                        f"unknown variable {token.value!r} for pluralization",
+                        token.lineno,
                         exc=TemplateAssertionError,
                     )
-                plural_expr = variables[name.value]
-                num_called_num = name.value == "num"
+                plural_expr = variables[token.value]
+                num_called_num = token.value == "num"
             parser.stream.expect("block_end")
             plural_names, plural = self._parse_block(parser, False)
             next(parser.stream)
@@ -311,9 +437,9 @@ def parse(self, parser):
             next(parser.stream)
 
         # register free names as simple name expressions
-        for var in referenced:
-            if var not in variables:
-                variables[var] = nodes.Name(var, "load")
+        for name in referenced:
+            if name not in variables:
+                variables[name] = nodes.Name(name, "load")
 
         if not have_plural:
             plural_expr = None
@@ -341,14 +467,17 @@ def parse(self, parser):
         else:
             return node
 
-    def _trim_whitespace(self, string, _ws_re=_ws_re):
+    def _trim_whitespace(self, string: str, _ws_re: t.Pattern[str] = _ws_re) -> str:
         return _ws_re.sub(" ", string.strip())
 
-    def _parse_block(self, parser, allow_pluralize):
+    def _parse_block(
+        self, parser: "Parser", allow_pluralize: bool
+    ) -> t.Tuple[t.List[str], str]:
         """Parse until the next block tag with a given name."""
         referenced = []
         buf = []
-        while 1:
+
+        while True:
             if parser.stream.current.type == "data":
                 buf.append(parser.stream.current.value.replace("%", "%%"))
                 next(parser.stream)
@@ -356,7 +485,7 @@ def _parse_block(self, parser, allow_pluralize):
                 next(parser.stream)
                 name = parser.stream.expect("name").value
                 referenced.append(name)
-                buf.append("%%(%s)s" % name)
+                buf.append(f"%({name})s")
                 parser.stream.expect("variable_end")
             elif parser.stream.current.type == "block_begin":
                 next(parser.stream)
@@ -379,12 +508,21 @@ def _parse_block(self, parser, allow_pluralize):
         return referenced, concat(buf)
 
     def _make_node(
-        self, singular, plural, variables, plural_expr, vars_referenced, num_called_num
-    ):
+        self,
+        singular: str,
+        plural: t.Optional[str],
+        variables: t.Dict[str, nodes.Expr],
+        plural_expr: t.Optional[nodes.Expr],
+        vars_referenced: bool,
+        num_called_num: bool,
+    ) -> nodes.Output:
         """Generates a useful node from the data provided."""
+        newstyle = self.environment.newstyle_gettext  # type: ignore
+        node: nodes.Expr
+
         # no variables referenced?  no need to escape for old style
         # gettext invocations only if there are vars.
-        if not vars_referenced and not self.environment.newstyle_gettext:
+        if not vars_referenced and not newstyle:
             singular = singular.replace("%%", "%")
             if plural:
                 plural = plural.replace("%%", "%")
@@ -408,8 +546,8 @@ def _make_node(
         # in case newstyle gettext is used, the method is powerful
         # enough to handle the variable expansion and autoescape
         # handling itself
-        if self.environment.newstyle_gettext:
-            for key, value in iteritems(variables):
+        if newstyle:
+            for key, value in variables.items():
                 # the function adds that later anyways in case num was
                 # called num, so just skip it.
                 if num_called_num and key == "num":
@@ -439,9 +577,9 @@ class ExprStmtExtension(Extension):
     that it doesn't print the return value.
     """
 
-    tags = set(["do"])
+    tags = {"do"}
 
-    def parse(self, parser):
+    def parse(self, parser: "Parser") -> nodes.ExprStmt:
         node = nodes.ExprStmt(lineno=next(parser.stream).lineno)
         node.node = parser.parse_tuple()
         return node
@@ -450,9 +588,9 @@ def parse(self, parser):
 class LoopControlExtension(Extension):
     """Adds break and continue to the template engine."""
 
-    tags = set(["break", "continue"])
+    tags = {"break", "continue"}
 
-    def parse(self, parser):
+    def parse(self, parser: "Parser") -> t.Union[nodes.Break, nodes.Continue]:
         token = next(parser.stream)
         if token.value == "break":
             return nodes.Break(lineno=token.lineno)
@@ -460,11 +598,25 @@ def parse(self, parser):
 
 
 class WithExtension(Extension):
-    pass
+    def __init__(self, environment: Environment) -> None:
+        super().__init__(environment)
+        warnings.warn(
+            "The 'with' extension is deprecated and will be removed in"
+            " Jinja 3.1. This is built in now.",
+            DeprecationWarning,
+            stacklevel=3,
+        )
 
 
 class AutoEscapeExtension(Extension):
-    pass
+    def __init__(self, environment: Environment) -> None:
+        super().__init__(environment)
+        warnings.warn(
+            "The 'autoescape' extension is deprecated and will be"
+            " removed in Jinja 3.1. This is built in now.",
+            DeprecationWarning,
+            stacklevel=3,
+        )
 
 
 class DebugExtension(Extension):
@@ -490,13 +642,13 @@ class DebugExtension(Extension):
 
     tags = {"debug"}
 
-    def parse(self, parser):
+    def parse(self, parser: "Parser") -> nodes.Output:
         lineno = parser.stream.expect("name:debug").lineno
-        context = ContextReference()
+        context = nodes.ContextReference()
         result = self.call_method("_render", [context], lineno=lineno)
         return nodes.Output([result], lineno=lineno)
 
-    def _render(self, context):
+    def _render(self, context: Context) -> str:
         result = {
             "context": context.get_all(),
             "filters": sorted(self.environment.filters.keys()),
@@ -504,13 +656,16 @@ def _render(self, context):
         }
 
         # Set the depth since the intent is to show the top few names.
-        if version_info[:2] >= (3, 4):
-            return pprint.pformat(result, depth=3, compact=True)
-        else:
-            return pprint.pformat(result, depth=3)
+        return pprint.pformat(result, depth=3, compact=True)
 
 
-def extract_from_ast(node, gettext_functions=GETTEXT_FUNCTIONS, babel_style=True):
+def extract_from_ast(
+    ast: nodes.Template,
+    gettext_functions: t.Sequence[str] = GETTEXT_FUNCTIONS,
+    babel_style: bool = True,
+) -> t.Iterator[
+    t.Tuple[int, str, t.Union[t.Optional[str], t.Tuple[t.Optional[str], ...]]]
+]:
     """Extract localizable strings from the given template node.  Per
     default this function returns matches in babel style that means non string
     parameters as well as keyword arguments are returned as `None`.  This
@@ -538,23 +693,26 @@ def extract_from_ast(node, gettext_functions=GETTEXT_FUNCTIONS, babel_style=True
     * ``lineno`` is the number of the line on which the string was found,
     * ``function`` is the name of the ``gettext`` function used (if the
       string was extracted from embedded Python code), and
-    *  ``message`` is the string itself (a ``unicode`` object, or a tuple
-       of ``unicode`` objects for functions with multiple string arguments).
+    *   ``message`` is the string, or a tuple of strings for functions
+         with multiple string arguments.
 
     This extraction function operates on the AST and is because of that unable
     to extract any comments.  For comment support you have to use the babel
     extraction interface or extract comments yourself.
     """
-    for node in node.find_all(nodes.Call):
+    out: t.Union[t.Optional[str], t.Tuple[t.Optional[str], ...]]
+
+    for node in ast.find_all(nodes.Call):
         if (
             not isinstance(node.node, nodes.Name)
             or node.node.name not in gettext_functions
         ):
             continue
 
-        strings = []
+        strings: t.List[t.Optional[str]] = []
+
         for arg in node.args:
-            if isinstance(arg, nodes.Const) and isinstance(arg.value, string_types):
+            if isinstance(arg, nodes.Const) and isinstance(arg.value, str):
                 strings.append(arg.value)
             else:
                 strings.append(None)
@@ -567,31 +725,35 @@ def extract_from_ast(node, gettext_functions=GETTEXT_FUNCTIONS, babel_style=True
             strings.append(None)
 
         if not babel_style:
-            strings = tuple(x for x in strings if x is not None)
-            if not strings:
+            out = tuple(x for x in strings if x is not None)
+
+            if not out:
                 continue
         else:
             if len(strings) == 1:
-                strings = strings[0]
+                out = strings[0]
             else:
-                strings = tuple(strings)
-        yield node.lineno, node.node.name, strings
+                out = tuple(strings)
+
+        yield node.lineno, node.node.name, out
 
 
-class _CommentFinder(object):
+class _CommentFinder:
     """Helper class to find comments in a token stream.  Can only
     find comments for gettext calls forwards.  Once the comment
     from line 4 is found, a comment for line 1 will not return a
     usable value.
     """
 
-    def __init__(self, tokens, comment_tags):
+    def __init__(
+        self, tokens: t.Sequence[t.Tuple[int, str, str]], comment_tags: t.Sequence[str]
+    ) -> None:
         self.tokens = tokens
         self.comment_tags = comment_tags
         self.offset = 0
         self.last_lineno = 0
 
-    def find_backwards(self, offset):
+    def find_backwards(self, offset: int) -> t.List[str]:
         try:
             for _, token_type, token_value in reversed(
                 self.tokens[self.offset : offset]
@@ -607,7 +769,7 @@ def find_backwards(self, offset):
         finally:
             self.offset = offset
 
-    def find_comments(self, lineno):
+    def find_comments(self, lineno: int) -> t.List[str]:
         if not self.comment_tags or self.last_lineno > lineno:
             return []
         for idx, (token_lineno, _, _) in enumerate(self.tokens[self.offset :]):
@@ -616,7 +778,16 @@ def find_comments(self, lineno):
         return self.find_backwards(len(self.tokens))
 
 
-def babel_extract(fileobj, keywords, comment_tags, options):
+def babel_extract(
+    fileobj: t.BinaryIO,
+    keywords: t.Sequence[str],
+    comment_tags: t.Sequence[str],
+    options: t.Dict[str, t.Any],
+) -> t.Iterator[
+    t.Tuple[
+        int, str, t.Union[t.Optional[str], t.Tuple[t.Optional[str], ...]], t.List[str]
+    ]
+]:
     """Babel extraction method for Jinja templates.
 
     .. versionchanged:: 2.3
@@ -644,33 +815,37 @@ def babel_extract(fileobj, keywords, comment_tags, options):
     :return: an iterator over ``(lineno, funcname, message, comments)`` tuples.
              (comments will be empty currently)
     """
-    extensions = set()
-    for extension in options.get("extensions", "").split(","):
-        extension = extension.strip()
-        if not extension:
-            continue
-        extensions.add(import_string(extension))
-    if InternationalizationExtension not in extensions:
-        extensions.add(InternationalizationExtension)
+    extensions: t.Dict[t.Type[Extension], None] = {}
 
-    def getbool(options, key, default=False):
-        return options.get(key, str(default)).lower() in ("1", "on", "yes", "true")
+    for extension_name in options.get("extensions", "").split(","):
+        extension_name = extension_name.strip()
+
+        if not extension_name:
+            continue
+
+        extensions[import_string(extension_name)] = None
+
+    if InternationalizationExtension not in extensions:
+        extensions[InternationalizationExtension] = None
+
+    def getbool(options: t.Mapping[str, str], key: str, default: bool = False) -> bool:
+        return options.get(key, str(default)).lower() in {"1", "on", "yes", "true"}
 
     silent = getbool(options, "silent", True)
     environment = Environment(
-        options.get("block_start_string", BLOCK_START_STRING),
-        options.get("block_end_string", BLOCK_END_STRING),
-        options.get("variable_start_string", VARIABLE_START_STRING),
-        options.get("variable_end_string", VARIABLE_END_STRING),
-        options.get("comment_start_string", COMMENT_START_STRING),
-        options.get("comment_end_string", COMMENT_END_STRING),
-        options.get("line_statement_prefix") or LINE_STATEMENT_PREFIX,
-        options.get("line_comment_prefix") or LINE_COMMENT_PREFIX,
-        getbool(options, "trim_blocks", TRIM_BLOCKS),
-        getbool(options, "lstrip_blocks", LSTRIP_BLOCKS),
-        NEWLINE_SEQUENCE,
-        getbool(options, "keep_trailing_newline", KEEP_TRAILING_NEWLINE),
-        frozenset(extensions),
+        options.get("block_start_string", defaults.BLOCK_START_STRING),
+        options.get("block_end_string", defaults.BLOCK_END_STRING),
+        options.get("variable_start_string", defaults.VARIABLE_START_STRING),
+        options.get("variable_end_string", defaults.VARIABLE_END_STRING),
+        options.get("comment_start_string", defaults.COMMENT_START_STRING),
+        options.get("comment_end_string", defaults.COMMENT_END_STRING),
+        options.get("line_statement_prefix") or defaults.LINE_STATEMENT_PREFIX,
+        options.get("line_comment_prefix") or defaults.LINE_COMMENT_PREFIX,
+        getbool(options, "trim_blocks", defaults.TRIM_BLOCKS),
+        getbool(options, "lstrip_blocks", defaults.LSTRIP_BLOCKS),
+        defaults.NEWLINE_SEQUENCE,
+        getbool(options, "keep_trailing_newline", defaults.KEEP_TRAILING_NEWLINE),
+        tuple(extensions),
         cache_size=0,
         auto_reload=False,
     )
@@ -678,7 +853,7 @@ def getbool(options, key, default=False):
     if getbool(options, "trimmed"):
         environment.policies["ext.i18n.trimmed"] = True
     if getbool(options, "newstyle_gettext"):
-        environment.newstyle_gettext = True
+        environment.newstyle_gettext = True  # type: ignore
 
     source = fileobj.read().decode(options.get("encoding", "utf-8"))
     try:

lib/spack/external/_vendoring/jinja2/idtracking.py

@@ -1,4 +1,6 @@
-from ._compat import iteritems
+import typing as t
+
+from . import nodes
 from .visitor import NodeVisitor
 
 VAR_LOAD_PARAMETER = "param"
@@ -7,7 +9,9 @@
 VAR_LOAD_UNDEFINED = "undefined"
 
 
-def find_symbols(nodes, parent_symbols=None):
+def find_symbols(
+    nodes: t.Iterable[nodes.Node], parent_symbols: t.Optional["Symbols"] = None
+) -> "Symbols":
     sym = Symbols(parent=parent_symbols)
     visitor = FrameSymbolVisitor(sym)
     for node in nodes:
@@ -15,66 +19,79 @@ def find_symbols(nodes, parent_symbols=None):
     return sym
 
 
-def symbols_for_node(node, parent_symbols=None):
+def symbols_for_node(
+    node: nodes.Node, parent_symbols: t.Optional["Symbols"] = None
+) -> "Symbols":
     sym = Symbols(parent=parent_symbols)
     sym.analyze_node(node)
     return sym
 
 
-class Symbols(object):
-    def __init__(self, parent=None, level=None):
+class Symbols:
+    def __init__(
+        self, parent: t.Optional["Symbols"] = None, level: t.Optional[int] = None
+    ) -> None:
         if level is None:
             if parent is None:
                 level = 0
             else:
                 level = parent.level + 1
-        self.level = level
-        self.parent = parent
-        self.refs = {}
-        self.loads = {}
-        self.stores = set()
 
-    def analyze_node(self, node, **kwargs):
+        self.level: int = level
+        self.parent = parent
+        self.refs: t.Dict[str, str] = {}
+        self.loads: t.Dict[str, t.Any] = {}
+        self.stores: t.Set[str] = set()
+
+    def analyze_node(self, node: nodes.Node, **kwargs: t.Any) -> None:
         visitor = RootVisitor(self)
         visitor.visit(node, **kwargs)
 
-    def _define_ref(self, name, load=None):
-        ident = "l_%d_%s" % (self.level, name)
+    def _define_ref(
+        self, name: str, load: t.Optional[t.Tuple[str, t.Optional[str]]] = None
+    ) -> str:
+        ident = f"l_{self.level}_{name}"
         self.refs[name] = ident
         if load is not None:
             self.loads[ident] = load
         return ident
 
-    def find_load(self, target):
+    def find_load(self, target: str) -> t.Optional[t.Any]:
         if target in self.loads:
             return self.loads[target]
+
         if self.parent is not None:
             return self.parent.find_load(target)
 
-    def find_ref(self, name):
+        return None
+
+    def find_ref(self, name: str) -> t.Optional[str]:
         if name in self.refs:
             return self.refs[name]
+
         if self.parent is not None:
             return self.parent.find_ref(name)
 
-    def ref(self, name):
+        return None
+
+    def ref(self, name: str) -> str:
         rv = self.find_ref(name)
         if rv is None:
             raise AssertionError(
-                "Tried to resolve a name to a reference that "
-                "was unknown to the frame (%r)" % name
+                "Tried to resolve a name to a reference that was"
+                f" unknown to the frame ({name!r})"
             )
         return rv
 
-    def copy(self):
-        rv = object.__new__(self.__class__)
+    def copy(self) -> "Symbols":
+        rv = t.cast(Symbols, object.__new__(self.__class__))
         rv.__dict__.update(self.__dict__)
         rv.refs = self.refs.copy()
         rv.loads = self.loads.copy()
         rv.stores = self.stores.copy()
         return rv
 
-    def store(self, name):
+    def store(self, name: str) -> None:
         self.stores.add(name)
 
         # If we have not see the name referenced yet, we need to figure
@@ -92,17 +109,16 @@ def store(self, name):
             # Otherwise we can just set it to undefined.
             self._define_ref(name, load=(VAR_LOAD_UNDEFINED, None))
 
-    def declare_parameter(self, name):
+    def declare_parameter(self, name: str) -> str:
         self.stores.add(name)
         return self._define_ref(name, load=(VAR_LOAD_PARAMETER, None))
 
-    def load(self, name):
-        target = self.find_ref(name)
-        if target is None:
+    def load(self, name: str) -> None:
+        if self.find_ref(name) is None:
             self._define_ref(name, load=(VAR_LOAD_RESOLVE, name))
 
-    def branch_update(self, branch_symbols):
-        stores = {}
+    def branch_update(self, branch_symbols: t.Sequence["Symbols"]) -> None:
+        stores: t.Dict[str, int] = {}
         for branch in branch_symbols:
             for target in branch.stores:
                 if target in self.stores:
@@ -114,10 +130,11 @@ def branch_update(self, branch_symbols):
             self.loads.update(sym.loads)
             self.stores.update(sym.stores)
 
-        for name, branch_count in iteritems(stores):
+        for name, branch_count in stores.items():
             if branch_count == len(branch_symbols):
                 continue
-            target = self.find_ref(name)
+
+            target = self.find_ref(name)  # type: ignore
             assert target is not None, "should not happen"
 
             if self.parent is not None:
@@ -127,56 +144,64 @@ def branch_update(self, branch_symbols):
                     continue
             self.loads[target] = (VAR_LOAD_RESOLVE, name)
 
-    def dump_stores(self):
-        rv = {}
-        node = self
+    def dump_stores(self) -> t.Dict[str, str]:
+        rv: t.Dict[str, str] = {}
+        node: t.Optional["Symbols"] = self
+
         while node is not None:
-            for name in node.stores:
+            for name in sorted(node.stores):
                 if name not in rv:
-                    rv[name] = self.find_ref(name)
+                    rv[name] = self.find_ref(name)  # type: ignore
+
             node = node.parent
+
         return rv
 
-    def dump_param_targets(self):
+    def dump_param_targets(self) -> t.Set[str]:
         rv = set()
-        node = self
+        node: t.Optional["Symbols"] = self
+
         while node is not None:
-            for target, (instr, _) in iteritems(self.loads):
+            for target, (instr, _) in self.loads.items():
                 if instr == VAR_LOAD_PARAMETER:
                     rv.add(target)
+
             node = node.parent
+
         return rv
 
 
 class RootVisitor(NodeVisitor):
-    def __init__(self, symbols):
+    def __init__(self, symbols: "Symbols") -> None:
         self.sym_visitor = FrameSymbolVisitor(symbols)
 
-    def _simple_visit(self, node, **kwargs):
+    def _simple_visit(self, node: nodes.Node, **kwargs: t.Any) -> None:
         for child in node.iter_child_nodes():
             self.sym_visitor.visit(child)
 
-    visit_Template = (
-        visit_Block
-    ) = (
-        visit_Macro
-    ) = (
-        visit_FilterBlock
-    ) = visit_Scope = visit_If = visit_ScopedEvalContextModifier = _simple_visit
+    visit_Template = _simple_visit
+    visit_Block = _simple_visit
+    visit_Macro = _simple_visit
+    visit_FilterBlock = _simple_visit
+    visit_Scope = _simple_visit
+    visit_If = _simple_visit
+    visit_ScopedEvalContextModifier = _simple_visit
 
-    def visit_AssignBlock(self, node, **kwargs):
+    def visit_AssignBlock(self, node: nodes.AssignBlock, **kwargs: t.Any) -> None:
         for child in node.body:
             self.sym_visitor.visit(child)
 
-    def visit_CallBlock(self, node, **kwargs):
+    def visit_CallBlock(self, node: nodes.CallBlock, **kwargs: t.Any) -> None:
         for child in node.iter_child_nodes(exclude=("call",)):
             self.sym_visitor.visit(child)
 
-    def visit_OverlayScope(self, node, **kwargs):
+    def visit_OverlayScope(self, node: nodes.OverlayScope, **kwargs: t.Any) -> None:
         for child in node.body:
             self.sym_visitor.visit(child)
 
-    def visit_For(self, node, for_branch="body", **kwargs):
+    def visit_For(
+        self, node: nodes.For, for_branch: str = "body", **kwargs: t.Any
+    ) -> None:
         if for_branch == "body":
             self.sym_visitor.visit(node.target, store_as_param=True)
             branch = node.body
@@ -189,28 +214,30 @@ def visit_For(self, node, for_branch="body", **kwargs):
             return
         else:
             raise RuntimeError("Unknown for branch")
-        for item in branch or ():
-            self.sym_visitor.visit(item)
 
-    def visit_With(self, node, **kwargs):
+        if branch:
+            for item in branch:
+                self.sym_visitor.visit(item)
+
+    def visit_With(self, node: nodes.With, **kwargs: t.Any) -> None:
         for target in node.targets:
             self.sym_visitor.visit(target)
         for child in node.body:
             self.sym_visitor.visit(child)
 
-    def generic_visit(self, node, *args, **kwargs):
-        raise NotImplementedError(
-            "Cannot find symbols for %r" % node.__class__.__name__
-        )
+    def generic_visit(self, node: nodes.Node, *args: t.Any, **kwargs: t.Any) -> None:
+        raise NotImplementedError(f"Cannot find symbols for {type(node).__name__!r}")
 
 
 class FrameSymbolVisitor(NodeVisitor):
     """A visitor for `Frame.inspect`."""
 
-    def __init__(self, symbols):
+    def __init__(self, symbols: "Symbols") -> None:
         self.symbols = symbols
 
-    def visit_Name(self, node, store_as_param=False, **kwargs):
+    def visit_Name(
+        self, node: nodes.Name, store_as_param: bool = False, **kwargs: t.Any
+    ) -> None:
         """All assignments to names go through this function."""
         if store_as_param or node.ctx == "param":
             self.symbols.declare_parameter(node.name)
@@ -219,72 +246,73 @@ def visit_Name(self, node, store_as_param=False, **kwargs):
         elif node.ctx == "load":
             self.symbols.load(node.name)
 
-    def visit_NSRef(self, node, **kwargs):
+    def visit_NSRef(self, node: nodes.NSRef, **kwargs: t.Any) -> None:
         self.symbols.load(node.name)
 
-    def visit_If(self, node, **kwargs):
+    def visit_If(self, node: nodes.If, **kwargs: t.Any) -> None:
         self.visit(node.test, **kwargs)
-
         original_symbols = self.symbols
 
-        def inner_visit(nodes):
+        def inner_visit(nodes: t.Iterable[nodes.Node]) -> "Symbols":
             self.symbols = rv = original_symbols.copy()
+
             for subnode in nodes:
                 self.visit(subnode, **kwargs)
+
             self.symbols = original_symbols
             return rv
 
         body_symbols = inner_visit(node.body)
         elif_symbols = inner_visit(node.elif_)
         else_symbols = inner_visit(node.else_ or ())
-
         self.symbols.branch_update([body_symbols, elif_symbols, else_symbols])
 
-    def visit_Macro(self, node, **kwargs):
+    def visit_Macro(self, node: nodes.Macro, **kwargs: t.Any) -> None:
         self.symbols.store(node.name)
 
-    def visit_Import(self, node, **kwargs):
+    def visit_Import(self, node: nodes.Import, **kwargs: t.Any) -> None:
         self.generic_visit(node, **kwargs)
         self.symbols.store(node.target)
 
-    def visit_FromImport(self, node, **kwargs):
+    def visit_FromImport(self, node: nodes.FromImport, **kwargs: t.Any) -> None:
         self.generic_visit(node, **kwargs)
+
         for name in node.names:
             if isinstance(name, tuple):
                 self.symbols.store(name[1])
             else:
                 self.symbols.store(name)
 
-    def visit_Assign(self, node, **kwargs):
+    def visit_Assign(self, node: nodes.Assign, **kwargs: t.Any) -> None:
         """Visit assignments in the correct order."""
         self.visit(node.node, **kwargs)
         self.visit(node.target, **kwargs)
 
-    def visit_For(self, node, **kwargs):
+    def visit_For(self, node: nodes.For, **kwargs: t.Any) -> None:
         """Visiting stops at for blocks.  However the block sequence
         is visited as part of the outer scope.
         """
         self.visit(node.iter, **kwargs)
 
-    def visit_CallBlock(self, node, **kwargs):
+    def visit_CallBlock(self, node: nodes.CallBlock, **kwargs: t.Any) -> None:
         self.visit(node.call, **kwargs)
 
-    def visit_FilterBlock(self, node, **kwargs):
+    def visit_FilterBlock(self, node: nodes.FilterBlock, **kwargs: t.Any) -> None:
         self.visit(node.filter, **kwargs)
 
-    def visit_With(self, node, **kwargs):
+    def visit_With(self, node: nodes.With, **kwargs: t.Any) -> None:
         for target in node.values:
             self.visit(target)
 
-    def visit_AssignBlock(self, node, **kwargs):
+    def visit_AssignBlock(self, node: nodes.AssignBlock, **kwargs: t.Any) -> None:
         """Stop visiting at block assigns."""
         self.visit(node.target, **kwargs)
 
-    def visit_Scope(self, node, **kwargs):
+    def visit_Scope(self, node: nodes.Scope, **kwargs: t.Any) -> None:
         """Stop visiting at scopes."""
 
-    def visit_Block(self, node, **kwargs):
+    def visit_Block(self, node: nodes.Block, **kwargs: t.Any) -> None:
         """Stop visiting at blocks."""
 
-    def visit_OverlayScope(self, node, **kwargs):
+    def visit_OverlayScope(self, node: nodes.OverlayScope, **kwargs: t.Any) -> None:
         """Do not visit into overlay scopes."""

lib/spack/external/_vendoring/jinja2/lexer.py

@@ -1,32 +1,48 @@
-# -*- coding: utf-8 -*-
 """Implements a Jinja / Python combination lexer. The ``Lexer`` class
 is used to do some preprocessing. It filters out invalid operators like
 the bitshift operators we don't allow in templates. It separates
 template code and python code in expressions.
 """
 import re
+import typing as t
 from ast import literal_eval
 from collections import deque
-from operator import itemgetter
+from sys import intern
 
-from ._compat import implements_iterator
-from ._compat import intern
-from ._compat import iteritems
-from ._compat import text_type
+from ._identifier import pattern as name_re
 from .exceptions import TemplateSyntaxError
 from .utils import LRUCache
 
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .environment import Environment
+
 # cache for the lexers. Exists in order to be able to have multiple
 # environments with the same lexer
-_lexer_cache = LRUCache(50)
+_lexer_cache: t.MutableMapping[t.Tuple, "Lexer"] = LRUCache(50)  # type: ignore
 
 # static regular expressions
-whitespace_re = re.compile(r"\s+", re.U)
+whitespace_re = re.compile(r"\s+")
 newline_re = re.compile(r"(\r\n|\r|\n)")
 string_re = re.compile(
     r"('([^'\\]*(?:\\.[^'\\]*)*)'" r'|"([^"\\]*(?:\\.[^"\\]*)*)")', re.S
 )
-integer_re = re.compile(r"(\d+_)*\d+")
+integer_re = re.compile(
+    r"""
+    (
+        0b(_?[0-1])+ # binary
+    |
+        0o(_?[0-7])+ # octal
+    |
+        0x(_?[\da-f])+ # hex
+    |
+        [1-9](_?\d)* # decimal
+    |
+        0(_?0)* # decimal zero
+    )
+    """,
+    re.IGNORECASE | re.VERBOSE,
+)
 float_re = re.compile(
     r"""
     (?<!\.)  # doesn't start with a .
@@ -41,20 +57,6 @@
     re.IGNORECASE | re.VERBOSE,
 )
 
-try:
-    # check if this Python supports Unicode identifiers
-    compile("föö", "<unknown>", "eval")
-except SyntaxError:
-    # Python 2, no Unicode support, use ASCII identifiers
-    name_re = re.compile(r"[a-zA-Z_][a-zA-Z0-9_]*")
-    check_ident = False
-else:
-    # Unicode support, import generated re pattern and set flag to use
-    # str.isidentifier to validate during lexing.
-    from ._identifier import pattern as name_re
-
-    check_ident = True
-
 # internal the tokens and keep references to them
 TOKEN_ADD = intern("add")
 TOKEN_ASSIGN = intern("assign")
@@ -136,10 +138,10 @@
     ";": TOKEN_SEMICOLON,
 }
 
-reverse_operators = dict([(v, k) for k, v in iteritems(operators)])
+reverse_operators = {v: k for k, v in operators.items()}
 assert len(operators) == len(reverse_operators), "operators dropped"
 operator_re = re.compile(
-    "(%s)" % "|".join(re.escape(x) for x in sorted(operators, key=lambda x: -len(x)))
+    f"({'|'.join(re.escape(x) for x in sorted(operators, key=lambda x: -len(x)))})"
 )
 
 ignored_tokens = frozenset(
@@ -158,9 +160,10 @@
 )
 
 
-def _describe_token_type(token_type):
+def _describe_token_type(token_type: str) -> str:
     if token_type in reverse_operators:
         return reverse_operators[token_type]
+
     return {
         TOKEN_COMMENT_BEGIN: "begin of comment",
         TOKEN_COMMENT_END: "end of comment",
@@ -177,32 +180,35 @@ def _describe_token_type(token_type):
     }.get(token_type, token_type)
 
 
-def describe_token(token):
+def describe_token(token: "Token") -> str:
     """Returns a description of the token."""
     if token.type == TOKEN_NAME:
         return token.value
+
     return _describe_token_type(token.type)
 
 
-def describe_token_expr(expr):
+def describe_token_expr(expr: str) -> str:
     """Like `describe_token` but for token expressions."""
     if ":" in expr:
         type, value = expr.split(":", 1)
+
         if type == TOKEN_NAME:
             return value
     else:
         type = expr
+
     return _describe_token_type(type)
 
 
-def count_newlines(value):
+def count_newlines(value: str) -> int:
     """Count the number of newline characters in the string.  This is
     useful for extensions that filter a stream.
     """
     return len(newline_re.findall(value))
 
 
-def compile_rules(environment):
+def compile_rules(environment: "Environment") -> t.List[t.Tuple[str, str]]:
     """Compiles all the rules from the environment into a list of rules."""
     e = re.escape
     rules = [
@@ -243,36 +249,30 @@ def compile_rules(environment):
     return [x[1:] for x in sorted(rules, reverse=True)]
 
 
-class Failure(object):
+class Failure:
     """Class that raises a `TemplateSyntaxError` if called.
     Used by the `Lexer` to specify known errors.
     """
 
-    def __init__(self, message, cls=TemplateSyntaxError):
+    def __init__(
+        self, message: str, cls: t.Type[TemplateSyntaxError] = TemplateSyntaxError
+    ) -> None:
         self.message = message
         self.error_class = cls
 
-    def __call__(self, lineno, filename):
+    def __call__(self, lineno: int, filename: str) -> "te.NoReturn":
         raise self.error_class(self.message, lineno, filename)
 
 
-class Token(tuple):
-    """Token class."""
+class Token(t.NamedTuple):
+    lineno: int
+    type: str
+    value: str
 
-    __slots__ = ()
-    lineno, type, value = (property(itemgetter(x)) for x in range(3))
+    def __str__(self) -> str:
+        return describe_token(self)
 
-    def __new__(cls, lineno, type, value):
-        return tuple.__new__(cls, (lineno, intern(str(type)), value))
-
-    def __str__(self):
-        if self.type in reverse_operators:
-            return reverse_operators[self.type]
-        elif self.type == "name":
-            return self.value
-        return self.type
-
-    def test(self, expr):
+    def test(self, expr: str) -> bool:
         """Test a token against a token expression.  This can either be a
         token type or ``'token_type:token_value'``.  This can only test
         against string values and types.
@@ -281,76 +281,75 @@ def test(self, expr):
         # passed an iterable of not interned strings.
         if self.type == expr:
             return True
-        elif ":" in expr:
+
+        if ":" in expr:
             return expr.split(":", 1) == [self.type, self.value]
+
         return False
 
-    def test_any(self, *iterable):
+    def test_any(self, *iterable: str) -> bool:
         """Test against multiple token expressions."""
-        for expr in iterable:
-            if self.test(expr):
-                return True
-        return False
-
-    def __repr__(self):
-        return "Token(%r, %r, %r)" % (self.lineno, self.type, self.value)
+        return any(self.test(expr) for expr in iterable)
 
 
-@implements_iterator
-class TokenStreamIterator(object):
+class TokenStreamIterator:
     """The iterator for tokenstreams.  Iterate over the stream
     until the eof token is reached.
     """
 
-    def __init__(self, stream):
+    def __init__(self, stream: "TokenStream") -> None:
         self.stream = stream
 
-    def __iter__(self):
+    def __iter__(self) -> "TokenStreamIterator":
         return self
 
-    def __next__(self):
+    def __next__(self) -> Token:
         token = self.stream.current
+
         if token.type is TOKEN_EOF:
             self.stream.close()
-            raise StopIteration()
+            raise StopIteration
+
         next(self.stream)
         return token
 
 
-@implements_iterator
-class TokenStream(object):
+class TokenStream:
     """A token stream is an iterable that yields :class:`Token`\\s.  The
     parser however does not iterate over it but calls :meth:`next` to go
     one token ahead.  The current active token is stored as :attr:`current`.
     """
 
-    def __init__(self, generator, name, filename):
+    def __init__(
+        self,
+        generator: t.Iterable[Token],
+        name: t.Optional[str],
+        filename: t.Optional[str],
+    ):
         self._iter = iter(generator)
-        self._pushed = deque()
+        self._pushed: "te.Deque[Token]" = deque()
         self.name = name
         self.filename = filename
         self.closed = False
         self.current = Token(1, TOKEN_INITIAL, "")
         next(self)
 
-    def __iter__(self):
+    def __iter__(self) -> TokenStreamIterator:
         return TokenStreamIterator(self)
 
-    def __bool__(self):
+    def __bool__(self) -> bool:
         return bool(self._pushed) or self.current.type is not TOKEN_EOF
 
-    __nonzero__ = __bool__  # py2
-
     @property
-    def eos(self):
+    def eos(self) -> bool:
         """Are we at the end of the stream?"""
         return not self
 
-    def push(self, token):
+    def push(self, token: Token) -> None:
         """Push a token back to the stream."""
         self._pushed.append(token)
 
-    def look(self):
+    def look(self) -> Token:
         """Look at the next token."""
         old_token = next(self)
         result = self.current
@@ -358,28 +357,31 @@ def look(self):
         self.current = old_token
         return result
 
-    def skip(self, n=1):
+    def skip(self, n: int = 1) -> None:
         """Got n tokens ahead."""
         for _ in range(n):
             next(self)
 
-    def next_if(self, expr):
+    def next_if(self, expr: str) -> t.Optional[Token]:
         """Perform the token test and return the token if it matched.
         Otherwise the return value is `None`.
         """
         if self.current.test(expr):
             return next(self)
 
-    def skip_if(self, expr):
+        return None
+
+    def skip_if(self, expr: str) -> bool:
         """Like :meth:`next_if` but only returns `True` or `False`."""
         return self.next_if(expr) is not None
 
-    def __next__(self):
+    def __next__(self) -> Token:
         """Go one token ahead and return the old one.
 
         Use the built-in :func:`next` instead of calling this directly.
         """
         rv = self.current
+
         if self._pushed:
             self.current = self._pushed.popleft()
         elif self.current.type is not TOKEN_EOF:
@@ -387,40 +389,41 @@ def __next__(self):
                 self.current = next(self._iter)
             except StopIteration:
                 self.close()
+
         return rv
 
-    def close(self):
+    def close(self) -> None:
         """Close the stream."""
         self.current = Token(self.current.lineno, TOKEN_EOF, "")
-        self._iter = None
+        self._iter = iter(())
         self.closed = True
 
-    def expect(self, expr):
+    def expect(self, expr: str) -> Token:
         """Expect a given token type and return it.  This accepts the same
         argument as :meth:`jinja2.lexer.Token.test`.
         """
         if not self.current.test(expr):
             expr = describe_token_expr(expr)
+
             if self.current.type is TOKEN_EOF:
                 raise TemplateSyntaxError(
-                    "unexpected end of template, expected %r." % expr,
+                    f"unexpected end of template, expected {expr!r}.",
                     self.current.lineno,
                     self.name,
                     self.filename,
                 )
+
             raise TemplateSyntaxError(
-                "expected token %r, got %r" % (expr, describe_token(self.current)),
+                f"expected token {expr!r}, got {describe_token(self.current)!r}",
                 self.current.lineno,
                 self.name,
                 self.filename,
             )
-        try:
-            return self.current
-        finally:
-            next(self)
+
+        return next(self)
 
 
-def get_lexer(environment):
+def get_lexer(environment: "Environment") -> "Lexer":
     """Return a lexer which is probably cached."""
     key = (
         environment.block_start_string,
@@ -437,9 +440,10 @@ def get_lexer(environment):
         environment.keep_trailing_newline,
     )
     lexer = _lexer_cache.get(key)
+
     if lexer is None:
-        lexer = Lexer(environment)
-        _lexer_cache[key] = lexer
+        _lexer_cache[key] = lexer = Lexer(environment)
+
     return lexer
 
 
@@ -452,11 +456,17 @@ class OptionalLStrip(tuple):
 
     # Even though it looks like a no-op, creating instances fails
     # without this.
-    def __new__(cls, *members, **kwargs):
-        return super(OptionalLStrip, cls).__new__(cls, members)
+    def __new__(cls, *members, **kwargs):  # type: ignore
+        return super().__new__(cls, members)
 
 
-class Lexer(object):
+class _Rule(t.NamedTuple):
+    pattern: t.Pattern[str]
+    tokens: t.Union[str, t.Tuple[str, ...], t.Tuple[Failure]]
+    command: t.Optional[str]
+
+
+class Lexer:
     """Class that implements a lexer for a given environment. Automatically
     created by the environment class, usually you don't have to do that.
 
@@ -464,21 +474,21 @@ class Lexer(object):
     Multiple environments can share the same lexer.
     """
 
-    def __init__(self, environment):
+    def __init__(self, environment: "Environment") -> None:
         # shortcuts
         e = re.escape
 
-        def c(x):
+        def c(x: str) -> t.Pattern[str]:
             return re.compile(x, re.M | re.S)
 
         # lexing rules for tags
-        tag_rules = [
-            (whitespace_re, TOKEN_WHITESPACE, None),
-            (float_re, TOKEN_FLOAT, None),
-            (integer_re, TOKEN_INTEGER, None),
-            (name_re, TOKEN_NAME, None),
-            (string_re, TOKEN_STRING, None),
-            (operator_re, TOKEN_OPERATOR, None),
+        tag_rules: t.List[_Rule] = [
+            _Rule(whitespace_re, TOKEN_WHITESPACE, None),
+            _Rule(float_re, TOKEN_FLOAT, None),
+            _Rule(integer_re, TOKEN_INTEGER, None),
+            _Rule(name_re, TOKEN_NAME, None),
+            _Rule(string_re, TOKEN_STRING, None),
+            _Rule(operator_re, TOKEN_OPERATOR, None),
         ]
 
         # assemble the root lexing rule. because "|" is ungreedy
@@ -489,8 +499,13 @@ def c(x):
         # is required.
         root_tag_rules = compile_rules(environment)
 
+        block_start_re = e(environment.block_start_string)
+        block_end_re = e(environment.block_end_string)
+        comment_end_re = e(environment.comment_end_string)
+        variable_end_re = e(environment.variable_end_string)
+
         # block suffix if trimming is enabled
-        block_suffix_re = environment.trim_blocks and "\\n?" or ""
+        block_suffix_re = "\\n?" if environment.trim_blocks else ""
 
         # If lstrip is enabled, it should not be applied if there is any
         # non-whitespace between the newline and block.
@@ -499,60 +514,44 @@ def c(x):
         self.newline_sequence = environment.newline_sequence
         self.keep_trailing_newline = environment.keep_trailing_newline
 
+        root_raw_re = (
+            fr"(?P<raw_begin>{block_start_re}(\-|\+|)\s*raw\s*"
+            fr"(?:\-{block_end_re}\s*|{block_end_re}))"
+        )
+        root_parts_re = "|".join(
+            [root_raw_re] + [fr"(?P<{n}>{r}(\-|\+|))" for n, r in root_tag_rules]
+        )
+
         # global lexing rules
-        self.rules = {
+        self.rules: t.Dict[str, t.List[_Rule]] = {
             "root": [
                 # directives
-                (
-                    c(
-                        "(.*?)(?:%s)"
-                        % "|".join(
-                            [
-                                r"(?P<raw_begin>%s(\-|\+|)\s*raw\s*(?:\-%s\s*|%s))"
-                                % (
-                                    e(environment.block_start_string),
-                                    e(environment.block_end_string),
-                                    e(environment.block_end_string),
-                                )
-                            ]
-                            + [
-                                r"(?P<%s>%s(\-|\+|))" % (n, r)
-                                for n, r in root_tag_rules
-                            ]
-                        )
-                    ),
-                    OptionalLStrip(TOKEN_DATA, "#bygroup"),
+                _Rule(
+                    c(fr"(.*?)(?:{root_parts_re})"),
+                    OptionalLStrip(TOKEN_DATA, "#bygroup"),  # type: ignore
                     "#bygroup",
                 ),
                 # data
-                (c(".+"), TOKEN_DATA, None),
+                _Rule(c(".+"), TOKEN_DATA, None),
             ],
             # comments
             TOKEN_COMMENT_BEGIN: [
-                (
+                _Rule(
                     c(
-                        r"(.*?)((?:\-%s\s*|%s)%s)"
-                        % (
-                            e(environment.comment_end_string),
-                            e(environment.comment_end_string),
-                            block_suffix_re,
-                        )
+                        fr"(.*?)((?:\+{comment_end_re}|\-{comment_end_re}\s*"
+                        fr"|{comment_end_re}{block_suffix_re}))"
                     ),
                     (TOKEN_COMMENT, TOKEN_COMMENT_END),
                     "#pop",
                 ),
-                (c("(.)"), (Failure("Missing end of comment tag"),), None),
+                _Rule(c(r"(.)"), (Failure("Missing end of comment tag"),), None),
             ],
             # blocks
             TOKEN_BLOCK_BEGIN: [
-                (
+                _Rule(
                     c(
-                        r"(?:\-%s\s*|%s)%s"
-                        % (
-                            e(environment.block_end_string),
-                            e(environment.block_end_string),
-                            block_suffix_re,
-                        )
+                        fr"(?:\+{block_end_re}|\-{block_end_re}\s*"
+                        fr"|{block_end_re}{block_suffix_re})"
                     ),
                     TOKEN_BLOCK_END,
                     "#pop",
@@ -561,14 +560,8 @@ def c(x):
             + tag_rules,
             # variables
             TOKEN_VARIABLE_BEGIN: [
-                (
-                    c(
-                        r"\-%s\s*|%s"
-                        % (
-                            e(environment.variable_end_string),
-                            e(environment.variable_end_string),
-                        )
-                    ),
+                _Rule(
+                    c(fr"\-{variable_end_re}\s*|{variable_end_re}"),
                     TOKEN_VARIABLE_END,
                     "#pop",
                 )
@@ -576,29 +569,25 @@ def c(x):
             + tag_rules,
             # raw block
             TOKEN_RAW_BEGIN: [
-                (
+                _Rule(
                     c(
-                        r"(.*?)((?:%s(\-|\+|))\s*endraw\s*(?:\-%s\s*|%s%s))"
-                        % (
-                            e(environment.block_start_string),
-                            e(environment.block_end_string),
-                            e(environment.block_end_string),
-                            block_suffix_re,
-                        )
+                        fr"(.*?)((?:{block_start_re}(\-|\+|))\s*endraw\s*"
+                        fr"(?:\+{block_end_re}|\-{block_end_re}\s*"
+                        fr"|{block_end_re}{block_suffix_re}))"
                     ),
-                    OptionalLStrip(TOKEN_DATA, TOKEN_RAW_END),
+                    OptionalLStrip(TOKEN_DATA, TOKEN_RAW_END),  # type: ignore
                     "#pop",
                 ),
-                (c("(.)"), (Failure("Missing end of raw directive"),), None),
+                _Rule(c(r"(.)"), (Failure("Missing end of raw directive"),), None),
             ],
             # line statements
             TOKEN_LINESTATEMENT_BEGIN: [
-                (c(r"\s*(\n|$)"), TOKEN_LINESTATEMENT_END, "#pop")
+                _Rule(c(r"\s*(\n|$)"), TOKEN_LINESTATEMENT_END, "#pop")
             ]
             + tag_rules,
             # line comments
             TOKEN_LINECOMMENT_BEGIN: [
-                (
+                _Rule(
                     c(r"(.*?)()(?=\n|$)"),
                     (TOKEN_LINECOMMENT, TOKEN_LINECOMMENT_END),
                     "#pop",
@@ -606,23 +595,39 @@ def c(x):
             ],
         }
 
-    def _normalize_newlines(self, value):
-        """Called for strings and template data to normalize it to unicode."""
+    def _normalize_newlines(self, value: str) -> str:
+        """Replace all newlines with the configured sequence in strings
+        and template data.
+        """
         return newline_re.sub(self.newline_sequence, value)
 
-    def tokenize(self, source, name=None, filename=None, state=None):
+    def tokenize(
+        self,
+        source: str,
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+        state: t.Optional[str] = None,
+    ) -> TokenStream:
         """Calls tokeniter + tokenize and wraps it in a token stream."""
         stream = self.tokeniter(source, name, filename, state)
         return TokenStream(self.wrap(stream, name, filename), name, filename)
 
-    def wrap(self, stream, name=None, filename=None):
+    def wrap(
+        self,
+        stream: t.Iterable[t.Tuple[int, str, str]],
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+    ) -> t.Iterator[Token]:
         """This is called with the stream as returned by `tokenize` and wraps
         every token in a :class:`Token` and converts the value.
         """
-        for lineno, token, value in stream:
+        for lineno, token, value_str in stream:
             if token in ignored_tokens:
                 continue
-            elif token == TOKEN_LINESTATEMENT_BEGIN:
+
+            value: t.Any = value_str
+
+            if token == TOKEN_LINESTATEMENT_BEGIN:
                 token = TOKEN_BLOCK_BEGIN
             elif token == TOKEN_LINESTATEMENT_END:
                 token = TOKEN_BLOCK_END
@@ -630,12 +635,13 @@ def wrap(self, stream, name=None, filename=None):
             elif token in (TOKEN_RAW_BEGIN, TOKEN_RAW_END):
                 continue
             elif token == TOKEN_DATA:
-                value = self._normalize_newlines(value)
+                value = self._normalize_newlines(value_str)
             elif token == "keyword":
-                token = value
+                token = value_str
             elif token == TOKEN_NAME:
-                value = str(value)
-                if check_ident and not value.isidentifier():
+                value = value_str
+
+                if not value.isidentifier():
                     raise TemplateSyntaxError(
                         "Invalid character in identifier", lineno, name, filename
                     )
@@ -643,51 +649,63 @@ def wrap(self, stream, name=None, filename=None):
                 # try to unescape string
                 try:
                     value = (
-                        self._normalize_newlines(value[1:-1])
+                        self._normalize_newlines(value_str[1:-1])
                         .encode("ascii", "backslashreplace")
                         .decode("unicode-escape")
                     )
                 except Exception as e:
                     msg = str(e).split(":")[-1].strip()
-                    raise TemplateSyntaxError(msg, lineno, name, filename)
+                    raise TemplateSyntaxError(msg, lineno, name, filename) from e
             elif token == TOKEN_INTEGER:
-                value = int(value.replace("_", ""))
+                value = int(value_str.replace("_", ""), 0)
             elif token == TOKEN_FLOAT:
                 # remove all "_" first to support more Python versions
-                value = literal_eval(value.replace("_", ""))
+                value = literal_eval(value_str.replace("_", ""))
             elif token == TOKEN_OPERATOR:
-                token = operators[value]
+                token = operators[value_str]
+
             yield Token(lineno, token, value)
 
-    def tokeniter(self, source, name, filename=None, state=None):
+    def tokeniter(
+        self,
+        source: str,
+        name: t.Optional[str],
+        filename: t.Optional[str] = None,
+        state: t.Optional[str] = None,
+    ) -> t.Iterator[t.Tuple[int, str, str]]:
         """This method tokenizes the text and returns the tokens in a
-        generator.  Use this method if you just want to tokenize a template.
+        generator. Use this method if you just want to tokenize a template.
+
+        .. versionchanged:: 3.0
+            Only ``\\n``, ``\\r\\n`` and ``\\r`` are treated as line
+            breaks.
         """
-        source = text_type(source)
-        lines = source.splitlines()
-        if self.keep_trailing_newline and source:
-            for newline in ("\r\n", "\r", "\n"):
-                if source.endswith(newline):
-                    lines.append("")
-                    break
+        lines = newline_re.split(source)[::2]
+
+        if not self.keep_trailing_newline and lines[-1] == "":
+            del lines[-1]
+
         source = "\n".join(lines)
         pos = 0
         lineno = 1
         stack = ["root"]
+
         if state is not None and state != "root":
             assert state in ("variable", "block"), "invalid state"
             stack.append(state + "_begin")
+
         statetokens = self.rules[stack[-1]]
         source_length = len(source)
-        balancing_stack = []
+        balancing_stack: t.List[str] = []
         lstrip_unless_re = self.lstrip_unless_re
         newlines_stripped = 0
         line_starting = True
 
-        while 1:
+        while True:
             # tokenizer loop
             for regex, tokens, new_state in statetokens:
                 m = regex.match(source, pos)
+
                 # if no match we try again with the next rule
                 if m is None:
                     continue
@@ -711,7 +729,6 @@ def tokeniter(self, source, name, filename=None, state=None):
                         # Rule supports lstrip. Match will look like
                         # text, block type, whitespace control, type, control, ...
                         text = groups[0]
-
                         # Skipping the text and first type, every other group is the
                         # whitespace control for each type. One of the groups will be
                         # -, +, or empty string instead of None.
@@ -721,7 +738,7 @@ def tokeniter(self, source, name, filename=None, state=None):
                             # Strip all whitespace between the text and the tag.
                             stripped = text.rstrip()
                             newlines_stripped = text[len(stripped) :].count("\n")
-                            groups = (stripped,) + groups[1:]
+                            groups = [stripped, *groups[1:]]
                         elif (
                             # Not marked for preserving whitespace.
                             strip_sign != "+"
@@ -732,11 +749,12 @@ def tokeniter(self, source, name, filename=None, state=None):
                         ):
                             # The start of text between the last newline and the tag.
                             l_pos = text.rfind("\n") + 1
+
                             if l_pos > 0 or line_starting:
                                 # If there's only whitespace between the newline and the
                                 # tag, strip it.
                                 if not lstrip_unless_re.search(text, l_pos):
-                                    groups = (text[:l_pos],) + groups[1:]
+                                    groups = [text[:l_pos], *groups[1:]]
 
                     for idx, token in enumerate(tokens):
                         # failure group
@@ -746,28 +764,30 @@ def tokeniter(self, source, name, filename=None, state=None):
                         # yield for the current token the first named
                         # group that matched
                         elif token == "#bygroup":
-                            for key, value in iteritems(m.groupdict()):
+                            for key, value in m.groupdict().items():
                                 if value is not None:
                                     yield lineno, key, value
                                     lineno += value.count("\n")
                                     break
                             else:
                                 raise RuntimeError(
-                                    "%r wanted to resolve "
-                                    "the token dynamically"
-                                    " but no group matched" % regex
+                                    f"{regex!r} wanted to resolve the token dynamically"
+                                    " but no group matched"
                                 )
                         # normal group
                         else:
                             data = groups[idx]
+
                             if data or token not in ignore_if_empty:
                                 yield lineno, token, data
+
                             lineno += data.count("\n") + newlines_stripped
                             newlines_stripped = 0
 
                 # strings as token just are yielded as it.
                 else:
                     data = m.group()
+
                     # update brace/parentheses balance
                     if tokens == TOKEN_OPERATOR:
                         if data == "{":
@@ -779,24 +799,26 @@ def tokeniter(self, source, name, filename=None, state=None):
                         elif data in ("}", ")", "]"):
                             if not balancing_stack:
                                 raise TemplateSyntaxError(
-                                    "unexpected '%s'" % data, lineno, name, filename
+                                    f"unexpected '{data}'", lineno, name, filename
                                 )
+
                             expected_op = balancing_stack.pop()
+
                             if expected_op != data:
                                 raise TemplateSyntaxError(
-                                    "unexpected '%s', "
-                                    "expected '%s'" % (data, expected_op),
+                                    f"unexpected '{data}', expected '{expected_op}'",
                                     lineno,
                                     name,
                                     filename,
                                 )
+
                     # yield items
                     if data or tokens not in ignore_if_empty:
                         yield lineno, tokens, data
+
                     lineno += data.count("\n")
 
                 line_starting = m.group()[-1:] == "\n"
-
                 # fetch new position into new variable so that we can check
                 # if there is a internal parsing error which would result
                 # in an infinite loop
@@ -809,27 +831,28 @@ def tokeniter(self, source, name, filename=None, state=None):
                         stack.pop()
                     # resolve the new state by group checking
                     elif new_state == "#bygroup":
-                        for key, value in iteritems(m.groupdict()):
+                        for key, value in m.groupdict().items():
                             if value is not None:
                                 stack.append(key)
                                 break
                         else:
                             raise RuntimeError(
-                                "%r wanted to resolve the "
-                                "new state dynamically but"
-                                " no group matched" % regex
+                                f"{regex!r} wanted to resolve the new state dynamically"
+                                f" but no group matched"
                             )
                     # direct state name given
                     else:
                         stack.append(new_state)
+
                     statetokens = self.rules[stack[-1]]
                 # we are still at the same position and no stack change.
                 # this means a loop without break condition, avoid that and
                 # raise error
                 elif pos2 == pos:
                     raise RuntimeError(
-                        "%r yielded empty string without stack change" % regex
+                        f"{regex!r} yielded empty string without stack change"
                     )
+
                 # publish new function and start again
                 pos = pos2
                 break
@@ -839,10 +862,8 @@ def tokeniter(self, source, name, filename=None, state=None):
                 # end of text
                 if pos >= source_length:
                     return
+
                 # something went wrong
                 raise TemplateSyntaxError(
-                    "unexpected char %r at %d" % (source[pos], pos),
-                    lineno,
-                    name,
-                    filename,
+                    f"unexpected char {source[pos]!r} at {pos}", lineno, name, filename
                 )

lib/spack/external/_vendoring/jinja2/loaders.py

@@ -1,33 +1,36 @@
-# -*- coding: utf-8 -*-
 """API and implementations for loading templates from different data
 sources.
 """
+import importlib.util
 import os
 import sys
+import typing as t
 import weakref
+import zipimport
+from collections import abc
 from hashlib import sha1
-from os import path
+from importlib import import_module
 from types import ModuleType
 
-from ._compat import abc
-from ._compat import fspath
-from ._compat import iteritems
-from ._compat import string_types
 from .exceptions import TemplateNotFound
 from .utils import internalcode
 from .utils import open_if_exists
 
+if t.TYPE_CHECKING:
+    from .environment import Environment
+    from .environment import Template
 
-def split_template_path(template):
+
+def split_template_path(template: str) -> t.List[str]:
     """Split a path into segments and perform a sanity check.  If it detects
     '..' in the path it will raise a `TemplateNotFound` error.
     """
     pieces = []
     for piece in template.split("/"):
         if (
-            path.sep in piece
-            or (path.altsep and path.altsep in piece)
-            or piece == path.pardir
+            os.path.sep in piece
+            or (os.path.altsep and os.path.altsep in piece)
+            or piece == os.path.pardir
         ):
             raise TemplateNotFound(template)
         elif piece and piece != ".":
@@ -35,7 +38,7 @@ def split_template_path(template):
     return pieces
 
 
-class BaseLoader(object):
+class BaseLoader:
     """Baseclass for all loaders.  Subclass this and override `get_source` to
     implement a custom loading mechanism.  The environment provides a
     `get_template` method that calls the loader's `load` method to get the
@@ -57,8 +60,8 @@ def get_source(self, environment, template):
                 if not exists(path):
                     raise TemplateNotFound(template)
                 mtime = getmtime(path)
-                with file(path) as f:
-                    source = f.read().decode('utf-8')
+                with open(path) as f:
+                    source = f.read()
                 return source, path, lambda: mtime == getmtime(path)
     """
 
@@ -68,16 +71,18 @@ def get_source(self, environment, template):
     #: .. versionadded:: 2.4
     has_source_access = True
 
-    def get_source(self, environment, template):
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]:
         """Get the template source, filename and reload helper for a template.
         It's passed the environment and template name and has to return a
         tuple in the form ``(source, filename, uptodate)`` or raise a
         `TemplateNotFound` error if it can't locate the template.
 
         The source part of the returned tuple must be the source of the
-        template as unicode string or a ASCII bytestring.  The filename should
-        be the name of the file on the filesystem if it was loaded from there,
-        otherwise `None`.  The filename is used by python for the tracebacks
+        template as a string. The filename should be the name of the
+        file on the filesystem if it was loaded from there, otherwise
+        ``None``. The filename is used by Python for the tracebacks
         if no loader extension is used.
 
         The last item in the tuple is the `uptodate` function.  If auto
@@ -88,18 +93,23 @@ def get_source(self, environment, template):
         """
         if not self.has_source_access:
             raise RuntimeError(
-                "%s cannot provide access to the source" % self.__class__.__name__
+                f"{type(self).__name__} cannot provide access to the source"
             )
         raise TemplateNotFound(template)
 
-    def list_templates(self):
+    def list_templates(self) -> t.List[str]:
         """Iterates over all templates.  If the loader does not support that
         it should raise a :exc:`TypeError` which is the default behavior.
         """
         raise TypeError("this loader cannot iterate over all templates")
 
     @internalcode
-    def load(self, environment, name, globals=None):
+    def load(
+        self,
+        environment: "Environment",
+        name: str,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
         """Loads a template.  This method looks up the template in the cache
         or loads one by calling :meth:`get_source`.  Subclasses should not
         override this method as loaders working on collections of other
@@ -139,44 +149,51 @@ def load(self, environment, name, globals=None):
 
 
 class FileSystemLoader(BaseLoader):
-    """Loads templates from the file system.  This loader can find templates
-    in folders on the file system and is the preferred way to load them.
+    """Load templates from a directory in the file system.
 
-    The loader takes the path to the templates as string, or if multiple
-    locations are wanted a list of them which is then looked up in the
-    given order::
+    The path can be relative or absolute. Relative paths are relative to
+    the current working directory.
 
-    >>> loader = FileSystemLoader('/path/to/templates')
-    >>> loader = FileSystemLoader(['/path/to/templates', '/other/path'])
+    .. code-block:: python
 
-    Per default the template encoding is ``'utf-8'`` which can be changed
-    by setting the `encoding` parameter to something else.
+        loader = FileSystemLoader("templates")
 
-    To follow symbolic links, set the *followlinks* parameter to ``True``::
+    A list of paths can be given. The directories will be searched in
+    order, stopping at the first matching template.
 
-    >>> loader = FileSystemLoader('/path/to/templates', followlinks=True)
+    .. code-block:: python
+
+        loader = FileSystemLoader(["/override/templates", "/default/templates"])
+
+    :param searchpath: A path, or list of paths, to the directory that
+        contains the templates.
+    :param encoding: Use this encoding to read the text from template
+        files.
+    :param followlinks: Follow symbolic links in the path.
 
     .. versionchanged:: 2.8
-       The ``followlinks`` parameter was added.
+        Added the ``followlinks`` parameter.
     """
 
-    def __init__(self, searchpath, encoding="utf-8", followlinks=False):
-        if not isinstance(searchpath, abc.Iterable) or isinstance(
-            searchpath, string_types
-        ):
+    def __init__(
+        self,
+        searchpath: t.Union[str, os.PathLike, t.Sequence[t.Union[str, os.PathLike]]],
+        encoding: str = "utf-8",
+        followlinks: bool = False,
+    ) -> None:
+        if not isinstance(searchpath, abc.Iterable) or isinstance(searchpath, str):
             searchpath = [searchpath]
 
-        # In Python 3.5, os.path.join doesn't support Path. This can be
-        # simplified to list(searchpath) when Python 3.5 is dropped.
-        self.searchpath = [fspath(p) for p in searchpath]
-
+        self.searchpath = [os.fspath(p) for p in searchpath]
         self.encoding = encoding
         self.followlinks = followlinks
 
-    def get_source(self, environment, template):
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, str, t.Callable[[], bool]]:
         pieces = split_template_path(template)
         for searchpath in self.searchpath:
-            filename = path.join(searchpath, *pieces)
+            filename = os.path.join(searchpath, *pieces)
             f = open_if_exists(filename)
             if f is None:
                 continue
@@ -185,18 +202,18 @@ def get_source(self, environment, template):
             finally:
                 f.close()
 
-            mtime = path.getmtime(filename)
+            mtime = os.path.getmtime(filename)
 
-            def uptodate():
+            def uptodate() -> bool:
                 try:
-                    return path.getmtime(filename) == mtime
+                    return os.path.getmtime(filename) == mtime
                 except OSError:
                     return False
 
             return contents, filename, uptodate
         raise TemplateNotFound(template)
 
-    def list_templates(self):
+    def list_templates(self) -> t.List[str]:
         found = set()
         for searchpath in self.searchpath:
             walk_dir = os.walk(searchpath, followlinks=self.followlinks)
@@ -215,105 +232,194 @@ def list_templates(self):
 
 
 class PackageLoader(BaseLoader):
-    """Load templates from python eggs or packages.  It is constructed with
-    the name of the python package and the path to the templates in that
-    package::
+    """Load templates from a directory in a Python package.
 
-        loader = PackageLoader('mypackage', 'views')
+    :param package_name: Import name of the package that contains the
+        template directory.
+    :param package_path: Directory within the imported package that
+        contains the templates.
+    :param encoding: Encoding of template files.
 
-    If the package path is not given, ``'templates'`` is assumed.
+    The following example looks up templates in the ``pages`` directory
+    within the ``project.ui`` package.
 
-    Per default the template encoding is ``'utf-8'`` which can be changed
-    by setting the `encoding` parameter to something else.  Due to the nature
-    of eggs it's only possible to reload templates if the package was loaded
-    from the file system and not a zip file.
+    .. code-block:: python
+
+        loader = PackageLoader("project.ui", "pages")
+
+    Only packages installed as directories (standard pip behavior) or
+    zip/egg files (less common) are supported. The Python API for
+    introspecting data in packages is too limited to support other
+    installation methods the way this loader requires.
+
+    There is limited support for :pep:`420` namespace packages. The
+    template directory is assumed to only be in one namespace
+    contributor. Zip files contributing to a namespace are not
+    supported.
+
+    .. versionchanged:: 3.0
+        No longer uses ``setuptools`` as a dependency.
+
+    .. versionchanged:: 3.0
+        Limited PEP 420 namespace package support.
     """
 
-    def __init__(self, package_name, package_path="templates", encoding="utf-8"):
-        from pkg_resources import DefaultProvider
-        from pkg_resources import get_provider
-        from pkg_resources import ResourceManager
+    def __init__(
+        self,
+        package_name: str,
+        package_path: "str" = "templates",
+        encoding: str = "utf-8",
+    ) -> None:
+        package_path = os.path.normpath(package_path).rstrip(os.path.sep)
+
+        # normpath preserves ".", which isn't valid in zip paths.
+        if package_path == os.path.curdir:
+            package_path = ""
+        elif package_path[:2] == os.path.curdir + os.path.sep:
+            package_path = package_path[2:]
 
-        provider = get_provider(package_name)
-        self.encoding = encoding
-        self.manager = ResourceManager()
-        self.filesystem_bound = isinstance(provider, DefaultProvider)
-        self.provider = provider
         self.package_path = package_path
+        self.package_name = package_name
+        self.encoding = encoding
 
-    def get_source(self, environment, template):
-        pieces = split_template_path(template)
-        p = "/".join((self.package_path,) + tuple(pieces))
+        # Make sure the package exists. This also makes namespace
+        # packages work, otherwise get_loader returns None.
+        import_module(package_name)
+        spec = importlib.util.find_spec(package_name)
+        assert spec is not None, "An import spec was not found for the package."
+        loader = spec.loader
+        assert loader is not None, "A loader was not found for the package."
+        self._loader = loader
+        self._archive = None
+        template_root = None
 
-        if not self.provider.has_resource(p):
-            raise TemplateNotFound(template)
+        if isinstance(loader, zipimport.zipimporter):
+            self._archive = loader.archive
+            pkgdir = next(iter(spec.submodule_search_locations))  # type: ignore
+            template_root = os.path.join(pkgdir, package_path)
+        else:
+            roots: t.List[str] = []
 
-        filename = uptodate = None
+            # One element for regular packages, multiple for namespace
+            # packages, or None for single module file.
+            if spec.submodule_search_locations:
+                roots.extend(spec.submodule_search_locations)
+            # A single module file, use the parent directory instead.
+            elif spec.origin is not None:
+                roots.append(os.path.dirname(spec.origin))
 
-        if self.filesystem_bound:
-            filename = self.provider.get_resource_filename(self.manager, p)
-            mtime = path.getmtime(filename)
+            for root in roots:
+                root = os.path.join(root, package_path)
 
-            def uptodate():
-                try:
-                    return path.getmtime(filename) == mtime
-                except OSError:
-                    return False
+                if os.path.isdir(root):
+                    template_root = root
+                    break
 
-        source = self.provider.get_resource_string(self.manager, p)
-        return source.decode(self.encoding), filename, uptodate
+        if template_root is None:
+            raise ValueError(
+                f"The {package_name!r} package was not installed in a"
+                " way that PackageLoader understands."
+            )
 
-    def list_templates(self):
-        path = self.package_path
+        self._template_root = template_root
 
-        if path[:2] == "./":
-            path = path[2:]
-        elif path == ".":
-            path = ""
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, str, t.Optional[t.Callable[[], bool]]]:
+        p = os.path.join(self._template_root, *split_template_path(template))
+        up_to_date: t.Optional[t.Callable[[], bool]]
 
-        offset = len(path)
-        results = []
+        if self._archive is None:
+            # Package is a directory.
+            if not os.path.isfile(p):
+                raise TemplateNotFound(template)
 
-        def _walk(path):
-            for filename in self.provider.resource_listdir(path):
-                fullname = path + "/" + filename
+            with open(p, "rb") as f:
+                source = f.read()
 
-                if self.provider.resource_isdir(fullname):
-                    _walk(fullname)
-                else:
-                    results.append(fullname[offset:].lstrip("/"))
+            mtime = os.path.getmtime(p)
+
+            def up_to_date() -> bool:
+                return os.path.isfile(p) and os.path.getmtime(p) == mtime
+
+        else:
+            # Package is a zip file.
+            try:
+                source = self._loader.get_data(p)  # type: ignore
+            except OSError as e:
+                raise TemplateNotFound(template) from e
+
+            # Could use the zip's mtime for all template mtimes, but
+            # would need to safely reload the module if it's out of
+            # date, so just report it as always current.
+            up_to_date = None
+
+        return source.decode(self.encoding), p, up_to_date
+
+    def list_templates(self) -> t.List[str]:
+        results: t.List[str] = []
+
+        if self._archive is None:
+            # Package is a directory.
+            offset = len(self._template_root)
+
+            for dirpath, _, filenames in os.walk(self._template_root):
+                dirpath = dirpath[offset:].lstrip(os.path.sep)
+                results.extend(
+                    os.path.join(dirpath, name).replace(os.path.sep, "/")
+                    for name in filenames
+                )
+        else:
+            if not hasattr(self._loader, "_files"):
+                raise TypeError(
+                    "This zip import does not have the required"
+                    " metadata to list templates."
+                )
+
+            # Package is a zip file.
+            prefix = (
+                self._template_root[len(self._archive) :].lstrip(os.path.sep)
+                + os.path.sep
+            )
+            offset = len(prefix)
+
+            for name in self._loader._files.keys():  # type: ignore
+                # Find names under the templates directory that aren't directories.
+                if name.startswith(prefix) and name[-1] != os.path.sep:
+                    results.append(name[offset:].replace(os.path.sep, "/"))
 
-        _walk(path)
         results.sort()
         return results
 
 
 class DictLoader(BaseLoader):
-    """Loads a template from a python dict.  It's passed a dict of unicode
-    strings bound to template names.  This loader is useful for unittesting:
+    """Loads a template from a Python dict mapping template names to
+    template source.  This loader is useful for unittesting:
 
     >>> loader = DictLoader({'index.html': 'source here'})
 
     Because auto reloading is rarely useful this is disabled per default.
     """
 
-    def __init__(self, mapping):
+    def __init__(self, mapping: t.Mapping[str, str]) -> None:
         self.mapping = mapping
 
-    def get_source(self, environment, template):
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, None, t.Callable[[], bool]]:
         if template in self.mapping:
             source = self.mapping[template]
             return source, None, lambda: source == self.mapping.get(template)
         raise TemplateNotFound(template)
 
-    def list_templates(self):
+    def list_templates(self) -> t.List[str]:
         return sorted(self.mapping)
 
 
 class FunctionLoader(BaseLoader):
     """A loader that is passed a function which does the loading.  The
     function receives the name of the template and has to return either
-    an unicode string with the template source, a tuple in the form ``(source,
+    a string with the template source, a tuple in the form ``(source,
     filename, uptodatefunc)`` or `None` if the template does not exist.
 
     >>> def load_template(name):
@@ -328,15 +434,30 @@ class FunctionLoader(BaseLoader):
     return value.
     """
 
-    def __init__(self, load_func):
+    def __init__(
+        self,
+        load_func: t.Callable[
+            [str],
+            t.Optional[
+                t.Union[
+                    str, t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]
+                ]
+            ],
+        ],
+    ) -> None:
         self.load_func = load_func
 
-    def get_source(self, environment, template):
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]:
         rv = self.load_func(template)
+
         if rv is None:
             raise TemplateNotFound(template)
-        elif isinstance(rv, string_types):
+
+        if isinstance(rv, str):
             return rv, None, None
+
         return rv
 
 
@@ -355,40 +476,49 @@ class PrefixLoader(BaseLoader):
     by loading ``'app2/index.html'`` the file from the second.
     """
 
-    def __init__(self, mapping, delimiter="/"):
+    def __init__(
+        self, mapping: t.Mapping[str, BaseLoader], delimiter: str = "/"
+    ) -> None:
         self.mapping = mapping
         self.delimiter = delimiter
 
-    def get_loader(self, template):
+    def get_loader(self, template: str) -> t.Tuple[BaseLoader, str]:
         try:
             prefix, name = template.split(self.delimiter, 1)
             loader = self.mapping[prefix]
-        except (ValueError, KeyError):
-            raise TemplateNotFound(template)
+        except (ValueError, KeyError) as e:
+            raise TemplateNotFound(template) from e
         return loader, name
 
-    def get_source(self, environment, template):
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]:
         loader, name = self.get_loader(template)
         try:
             return loader.get_source(environment, name)
-        except TemplateNotFound:
+        except TemplateNotFound as e:
             # re-raise the exception with the correct filename here.
             # (the one that includes the prefix)
-            raise TemplateNotFound(template)
+            raise TemplateNotFound(template) from e
 
     @internalcode
-    def load(self, environment, name, globals=None):
+    def load(
+        self,
+        environment: "Environment",
+        name: str,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
         loader, local_name = self.get_loader(name)
         try:
             return loader.load(environment, local_name, globals)
-        except TemplateNotFound:
+        except TemplateNotFound as e:
             # re-raise the exception with the correct filename here.
             # (the one that includes the prefix)
-            raise TemplateNotFound(name)
+            raise TemplateNotFound(name) from e
 
-    def list_templates(self):
+    def list_templates(self) -> t.List[str]:
         result = []
-        for prefix, loader in iteritems(self.mapping):
+        for prefix, loader in self.mapping.items():
             for template in loader.list_templates():
                 result.append(prefix + self.delimiter + template)
         return result
@@ -408,10 +538,12 @@ class ChoiceLoader(BaseLoader):
     from a different location.
     """
 
-    def __init__(self, loaders):
+    def __init__(self, loaders: t.Sequence[BaseLoader]) -> None:
         self.loaders = loaders
 
-    def get_source(self, environment, template):
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]:
         for loader in self.loaders:
             try:
                 return loader.get_source(environment, template)
@@ -420,7 +552,12 @@ def get_source(self, environment, template):
         raise TemplateNotFound(template)
 
     @internalcode
-    def load(self, environment, name, globals=None):
+    def load(
+        self,
+        environment: "Environment",
+        name: str,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
         for loader in self.loaders:
             try:
                 return loader.load(environment, name, globals)
@@ -428,7 +565,7 @@ def load(self, environment, name, globals=None):
                 pass
         raise TemplateNotFound(name)
 
-    def list_templates(self):
+    def list_templates(self) -> t.List[str]:
         found = set()
         for loader in self.loaders:
             found.update(loader.list_templates())
@@ -454,17 +591,19 @@ class ModuleLoader(BaseLoader):
 
     has_source_access = False
 
-    def __init__(self, path):
-        package_name = "_jinja2_module_templates_%x" % id(self)
+    def __init__(
+        self, path: t.Union[str, os.PathLike, t.Sequence[t.Union[str, os.PathLike]]]
+    ) -> None:
+        package_name = f"_jinja2_module_templates_{id(self):x}"
 
         # create a fake module that looks for the templates in the
         # path given.
         mod = _TemplateModule(package_name)
 
-        if not isinstance(path, abc.Iterable) or isinstance(path, string_types):
+        if not isinstance(path, abc.Iterable) or isinstance(path, str):
             path = [path]
 
-        mod.__path__ = [fspath(p) for p in path]
+        mod.__path__ = [os.fspath(p) for p in path]  # type: ignore
 
         sys.modules[package_name] = weakref.proxy(
             mod, lambda x: sys.modules.pop(package_name, None)
@@ -477,28 +616,37 @@ def __init__(self, path):
         self.package_name = package_name
 
     @staticmethod
-    def get_template_key(name):
+    def get_template_key(name: str) -> str:
         return "tmpl_" + sha1(name.encode("utf-8")).hexdigest()
 
     @staticmethod
-    def get_module_filename(name):
+    def get_module_filename(name: str) -> str:
         return ModuleLoader.get_template_key(name) + ".py"
 
     @internalcode
-    def load(self, environment, name, globals=None):
+    def load(
+        self,
+        environment: "Environment",
+        name: str,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
         key = self.get_template_key(name)
-        module = "%s.%s" % (self.package_name, key)
+        module = f"{self.package_name}.{key}"
         mod = getattr(self.module, module, None)
+
         if mod is None:
             try:
                 mod = __import__(module, None, None, ["root"])
-            except ImportError:
-                raise TemplateNotFound(name)
+            except ImportError as e:
+                raise TemplateNotFound(name) from e
 
             # remove the entry from sys.modules, we only want the attribute
             # on the module object we have stored on the loader.
             sys.modules.pop(module, None)
 
+        if globals is None:
+            globals = {}
+
         return environment.template_class.from_module_dict(
             environment, mod.__dict__, globals
         )

lib/spack/external/_vendoring/jinja2/meta.py

@@ -1,32 +1,36 @@
-# -*- coding: utf-8 -*-
 """Functions that expose information about templates that might be
 interesting for introspection.
 """
+import typing as t
+
 from . import nodes
-from ._compat import iteritems
-from ._compat import string_types
 from .compiler import CodeGenerator
+from .compiler import Frame
+
+if t.TYPE_CHECKING:
+    from .environment import Environment
 
 
 class TrackingCodeGenerator(CodeGenerator):
     """We abuse the code generator for introspection."""
 
-    def __init__(self, environment):
-        CodeGenerator.__init__(self, environment, "<introspection>", "<introspection>")
-        self.undeclared_identifiers = set()
+    def __init__(self, environment: "Environment") -> None:
+        super().__init__(environment, "<introspection>", "<introspection>")
+        self.undeclared_identifiers: t.Set[str] = set()
 
-    def write(self, x):
+    def write(self, x: str) -> None:
         """Don't write."""
 
-    def enter_frame(self, frame):
+    def enter_frame(self, frame: Frame) -> None:
         """Remember all undeclared identifiers."""
-        CodeGenerator.enter_frame(self, frame)
-        for _, (action, param) in iteritems(frame.symbols.loads):
+        super().enter_frame(frame)
+
+        for _, (action, param) in frame.symbols.loads.items():
             if action == "resolve" and param not in self.environment.globals:
                 self.undeclared_identifiers.add(param)
 
 
-def find_undeclared_variables(ast):
+def find_undeclared_variables(ast: nodes.Template) -> t.Set[str]:
     """Returns a set of all variables in the AST that will be looked up from
     the context at runtime.  Because at compile time it's not known which
     variables will be used depending on the path the execution takes at
@@ -35,7 +39,7 @@ def find_undeclared_variables(ast):
     >>> from jinja2 import Environment, meta
     >>> env = Environment()
     >>> ast = env.parse('{% set foo = 42 %}{{ bar + foo }}')
-    >>> meta.find_undeclared_variables(ast) == set(['bar'])
+    >>> meta.find_undeclared_variables(ast) == {'bar'}
     True
 
     .. admonition:: Implementation
@@ -45,12 +49,16 @@ def find_undeclared_variables(ast):
        :exc:`TemplateAssertionError` during compilation and as a matter of
        fact this function can currently raise that exception as well.
     """
-    codegen = TrackingCodeGenerator(ast.environment)
+    codegen = TrackingCodeGenerator(ast.environment)  # type: ignore
     codegen.visit(ast)
     return codegen.undeclared_identifiers
 
 
-def find_referenced_templates(ast):
+_ref_types = (nodes.Extends, nodes.FromImport, nodes.Import, nodes.Include)
+_RefType = t.Union[nodes.Extends, nodes.FromImport, nodes.Import, nodes.Include]
+
+
+def find_referenced_templates(ast: nodes.Template) -> t.Iterator[t.Optional[str]]:
     """Finds all the referenced templates from the AST.  This will return an
     iterator over all the hardcoded template extensions, inclusions and
     imports.  If dynamic inheritance or inclusion is used, `None` will be
@@ -65,17 +73,19 @@ def find_referenced_templates(ast):
     This function is useful for dependency tracking.  For example if you want
     to rebuild parts of the website after a layout template has changed.
     """
-    for node in ast.find_all(
-        (nodes.Extends, nodes.FromImport, nodes.Import, nodes.Include)
-    ):
-        if not isinstance(node.template, nodes.Const):
+    template_name: t.Any
+
+    for node in ast.find_all(_ref_types):
+        template: nodes.Expr = node.template  # type: ignore
+
+        if not isinstance(template, nodes.Const):
             # a tuple with some non consts in there
-            if isinstance(node.template, (nodes.Tuple, nodes.List)):
-                for template_name in node.template.items:
+            if isinstance(template, (nodes.Tuple, nodes.List)):
+                for template_name in template.items:
                     # something const, only yield the strings and ignore
                     # non-string consts that really just make no sense
                     if isinstance(template_name, nodes.Const):
-                        if isinstance(template_name.value, string_types):
+                        if isinstance(template_name.value, str):
                             yield template_name.value
                     # something dynamic in there
                     else:
@@ -85,16 +95,16 @@ def find_referenced_templates(ast):
                 yield None
             continue
         # constant is a basestring, direct template name
-        if isinstance(node.template.value, string_types):
-            yield node.template.value
+        if isinstance(template.value, str):
+            yield template.value
         # a tuple or list (latter *should* not happen) made of consts,
         # yield the consts that are strings.  We could warn here for
         # non string values
         elif isinstance(node, nodes.Include) and isinstance(
-            node.template.value, (tuple, list)
+            template.value, (tuple, list)
         ):
-            for template_name in node.template.value:
-                if isinstance(template_name, string_types):
+            for template_name in template.value:
+                if isinstance(template_name, str):
                     yield template_name
         # something else we don't care about, we could warn here
         else: