Update version number

Signed-off-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

.flake8

@@ -28,7 +28,7 @@ max-line-length = 99
 # - F821: undefined name `name`
 #
 per-file-ignores =
-  var/spack/*/package.py:F403,F405,F821
+  var/spack/repos/*/package.py:F403,F405,F821
   *-ci-package.py:F403,F405,F821
 
 # exclude things we usually do not want linting for.

.gitattributes

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

.github/workflows/audit.yaml

@@ -59,6 +59,7 @@ jobs:
     - name: Package audits (without coverage)
       if: ${{ runner.os == 'Windows' }}
       run: |
+          . share/spack/setup-env.sh
           spack -d audit packages
           ./share/spack/qa/validate_last_exit.ps1
           spack -d audit configs

.github/workflows/bootstrap.yml

@@ -26,7 +26,7 @@ jobs:
           dnf install -y \
               bzip2 curl file gcc-c++ gcc gcc-gfortran git gzip \
               make patch unzip which xz python3 python3-devel tree \
-              cmake bison bison-devel libstdc++-static gawk
+              cmake bison bison-devel libstdc++-static
       - name: Setup OpenSUSE
         if: ${{ matrix.image == 'opensuse/leap:latest' }}
         run: |

.github/workflows/ci.yaml

@@ -9,7 +9,6 @@ on:
     branches:
       - develop
       - releases/**
-  merge_group:
 
 concurrency:
   group: ci-${{github.ref}}-${{github.event.pull_request.number || github.run_number}}
@@ -26,33 +25,29 @@ jobs:
       packages: ${{ steps.filter.outputs.packages }}
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-        if: ${{ github.event_name == 'push' || github.event_name == 'merge_group' }}
+        if: ${{ github.event_name == 'push' }}
         with:
           fetch-depth: 0
             # For pull requests it's not necessary to checkout the code
       - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36
         id: filter
         with:
-          # For merge group events, compare against the target branch (main)
-          base: ${{ github.event_name == 'merge_group' && github.event.merge_group.base_ref || '' }}
-          # For merge group events, use the merge group head ref
-          ref: ${{ github.event_name == 'merge_group' && github.event.merge_group.head_sha || github.ref }}
           # See https://github.com/dorny/paths-filter/issues/56 for the syntax used below
           # Don't run if we only modified packages in the
           # built-in repository or documentation
           filters: |
             bootstrap:
-            - 'var/spack/repos/spack_repo/builtin/packages/clingo-bootstrap/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/clingo/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/python/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/re2c/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/gnupg/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/libassuan/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/libgcrypt/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/libgpg-error/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/libksba/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/npth/**'
-            - 'var/spack/repos/spack_repo/builtin/packages/pinentry/**'
+            - 'var/spack/repos/builtin/packages/clingo-bootstrap/**'
+            - 'var/spack/repos/builtin/packages/clingo/**'
+            - 'var/spack/repos/builtin/packages/python/**'
+            - 'var/spack/repos/builtin/packages/re2c/**'
+            - 'var/spack/repos/builtin/packages/gnupg/**'
+            - 'var/spack/repos/builtin/packages/libassuan/**'
+            - 'var/spack/repos/builtin/packages/libgcrypt/**'
+            - 'var/spack/repos/builtin/packages/libgpg-error/**'
+            - 'var/spack/repos/builtin/packages/libksba/**'
+            - 'var/spack/repos/builtin/packages/npth/**'
+            - 'var/spack/repos/builtin/packages/pinentry/**'
             - 'lib/spack/**'
             - 'share/spack/**'
             - '.github/workflows/bootstrap.yml'
@@ -81,11 +76,10 @@ jobs:
 
   prechecks:
     needs: [ changes ]
-    uses: ./.github/workflows/prechecks.yml
+    uses: ./.github/workflows/valid-style.yml
     secrets: inherit
     with:
       with_coverage: ${{ needs.changes.outputs.core }}
-      with_packages: ${{ needs.changes.outputs.packages }}
 
   import-check:
     needs: [ changes ]
@@ -99,7 +93,7 @@ jobs:
     - name: Success
       run: |
         if [ "${{ needs.prechecks.result }}" == "failure" ] || [ "${{ needs.prechecks.result }}" == "canceled" ]; then
-          echo "Unit tests failed."
+          echo "Unit tests failed." 
           exit 1
         else
           exit 0
@@ -107,7 +101,6 @@ jobs:
 
   coverage:
     needs: [ unit-tests, prechecks ]
-    if: ${{ needs.changes.outputs.core }}
     uses: ./.github/workflows/coverage.yml
     secrets: inherit
 
@@ -120,10 +113,10 @@ jobs:
     - name: Status summary
       run: |
         if [ "${{ needs.unit-tests.result }}" == "failure" ] || [ "${{ needs.unit-tests.result }}" == "canceled" ]; then
-          echo "Unit tests failed."
+          echo "Unit tests failed." 
           exit 1
         elif [ "${{ needs.bootstrap.result }}" == "failure" ] || [ "${{ needs.bootstrap.result }}" == "canceled" ]; then
-          echo "Bootstrap tests failed."
+          echo "Bootstrap tests failed." 
           exit 1
         else
           exit 0

.github/workflows/prechecks.yml

@@ -1,108 +0,0 @@
-name: prechecks
-
-on:
-  workflow_call:
-    inputs:
-      with_coverage:
-        required: true
-        type: string
-      with_packages:
-        required: true
-        type: string
-
-concurrency:
-  group: style-${{github.ref}}-${{github.event.pull_request.number || github.run_number}}
-  cancel-in-progress: true
-
-
-jobs:
-  # Validate that the code can be run on all the Python versions supported by Spack
-  validate:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-    - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b
-      with:
-        python-version: '3.13'
-        cache: 'pip'
-        cache-dependency-path: '.github/workflows/requirements/style/requirements.txt'
-    - name: Install Python Packages
-      run: |
-        pip install -r .github/workflows/requirements/style/requirements.txt
-    - name: vermin (Spack's Core)
-      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 importlib --backport argparse --violations --backport typing -t=3.6- -vvv var/spack/repos var/spack/test_repos
-
-  # Run style checks on the files that have been changed
-  style:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      with:
-        fetch-depth: 2
-    - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b
-      with:
-        python-version: '3.13'
-        cache: 'pip'
-        cache-dependency-path: '.github/workflows/requirements/style/requirements.txt'
-    - name: Install Python packages
-      run: |
-        pip install -r .github/workflows/requirements/style/requirements.txt
-    - name: Run style tests
-      run: |
-        bin/spack style --base HEAD^1
-        bin/spack license verify
-        pylint -j $(nproc) --disable=all --enable=unspecified-encoding --ignore-paths=lib/spack/external lib
-
-  audit:
-    uses: ./.github/workflows/audit.yaml
-    secrets: inherit
-    with:
-      with_coverage: ${{ inputs.with_coverage }}
-      python_version: '3.13'
-
-  verify-checksums:
-    # do not run if the commit message or PR description contains [skip-verify-checksums]
-    if: >-
-      ${{ inputs.with_packages == 'true' &&
-      !contains(github.event.pull_request.body, '[skip-verify-checksums]') &&
-      !contains(github.event.head_commit.message, '[skip-verify-checksums]') }}
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
-      with:
-        fetch-depth: 2
-    - name: Verify Added Checksums
-      run: |
-        bin/spack ci verify-versions HEAD^1 HEAD
-
-  # Check that spack can bootstrap the development environment on Python 3.6 - RHEL8
-  bootstrap-dev-rhel8:
-    runs-on: ubuntu-latest
-    container: registry.access.redhat.com/ubi8/ubi
-    steps:
-      - name: Install dependencies
-        run: |
-          dnf install -y \
-              bzip2 curl file gcc-c++ gcc gcc-gfortran git gnupg2 gzip \
-              make patch tcl unzip which xz
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - name: Setup repo and non-root user
-        run: |
-          git --version
-          git config --global --add safe.directory '*'
-          git fetch --unshallow
-          . .github/workflows/bin/setup_git.sh
-          useradd spack-test
-          chown -R spack-test .
-      - name: Bootstrap Spack development environment
-        shell: runuser -u spack-test -- bash {0}
-        run: |
-          source share/spack/setup-env.sh
-          spack debug report
-          spack -d bootstrap now --dev
-          spack -d style -t black
-          spack unit-test -V

.github/workflows/requirements/style/requirements.txt

@@ -1,8 +1,7 @@
 black==25.1.0
-clingo==5.8.0
-flake8==7.2.0
-isort==6.0.1
+clingo==5.7.1
+flake8==7.1.2
+isort==6.0.0
 mypy==1.15.0
-types-six==1.17.0.20250403
+types-six==1.17.0.20241205
 vermin==1.6.0
-pylint==3.3.7

.github/workflows/unit_tests.yaml

@@ -19,6 +19,9 @@ jobs:
         on_develop:
         - ${{ github.ref == 'refs/heads/develop' }}
         include:
+        - python-version: '3.6'
+          os: ubuntu-20.04
+          on_develop: ${{ github.ref == 'refs/heads/develop' }}
         - python-version: '3.7'
           os: ubuntu-22.04
           on_develop: ${{ github.ref == 'refs/heads/develop' }}

.github/workflows/valid-style.yml

@@ -0,0 +1,106 @@
+name: style
+
+on:
+  workflow_call:
+    inputs:
+      with_coverage:
+        required: true
+        type: string
+
+concurrency:
+  group: style-${{github.ref}}-${{github.event.pull_request.number || github.run_number}}
+  cancel-in-progress: true
+
+
+jobs:
+  # Validate that the code can be run on all the Python versions supported by Spack
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+    - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b
+      with:
+        python-version: '3.13'
+        cache: 'pip'
+    - name: Install Python Packages
+      run: |
+        pip install --upgrade pip setuptools
+        pip install -r .github/workflows/requirements/style/requirements.txt
+    - name: vermin (Spack's Core)
+      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 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@11bd71901bbe5b1630ceea73d27597364c9af683
+      with:
+        fetch-depth: 0
+    - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b
+      with:
+        python-version: '3.13'
+        cache: 'pip'
+    - name: Install Python packages
+      run: |
+        pip install --upgrade pip setuptools
+        pip install -r .github/workflows/requirements/style/requirements.txt
+    - name: Setup git configuration
+      run: |
+        # Need this for the git tests to succeed.
+        git --version
+        . .github/workflows/bin/setup_git.sh
+    - name: Run style tests
+      run: |
+          share/spack/qa/run-style-tests
+  audit:
+    uses: ./.github/workflows/audit.yaml
+    secrets: inherit
+    with:
+      with_coverage: ${{ inputs.with_coverage }}
+      python_version: '3.13'
+  # Check that spack can bootstrap the development environment on Python 3.6 - RHEL8
+  bootstrap-dev-rhel8:
+    runs-on: ubuntu-latest
+    container: registry.access.redhat.com/ubi8/ubi
+    steps:
+      - name: Install dependencies
+        run: |
+          dnf install -y \
+              bzip2 curl file gcc-c++ gcc gcc-gfortran git gnupg2 gzip \
+              make patch tcl unzip which xz
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      - name: Setup repo and non-root user
+        run: |
+          git --version
+          git config --global --add safe.directory '*'
+          git fetch --unshallow
+          . .github/workflows/bin/setup_git.sh
+          useradd spack-test
+          chown -R spack-test .
+      - name: Bootstrap Spack development environment
+        shell: runuser -u spack-test -- bash {0}
+        run: |
+          source share/spack/setup-env.sh
+          spack debug report
+          spack -d bootstrap now --dev
+          spack -d style -t black
+          spack unit-test -V
+
+  # Further style checks from pylint
+  pylint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b
+        with:
+          python-version: '3.13'
+          cache: 'pip'
+      - name: Install Python packages
+        run: |
+          pip install --upgrade pip setuptools pylint
+      - name: Pylint (Spack Core)
+        run: |
+          pylint -j 4 --disable=all --enable=unspecified-encoding --ignore-paths=lib/spack/external lib

.gitignore

@@ -201,6 +201,7 @@ tramp
 
 # Org-mode
 .org-id-locations
+*_archive
 
 # flymake-mode
 *_flymake.*

README.md

@@ -46,42 +46,18 @@ See the
 [Feature Overview](https://spack.readthedocs.io/en/latest/features.html)
 for examples and highlights.
 
-Installation
-----------------
-
-To install spack, first make sure you have Python & Git.
+To install spack and your first package, make sure you have Python & Git.
 Then:
 
-```bash
-git clone -c feature.manyFiles=true --depth=2 https://github.com/spack/spack.git
-```
-
-<details>
-<summary>What are <code>manyFiles=true</code> and <code>--depth=2</code>?</summary>
-<br>
+    $ git clone -c feature.manyFiles=true --depth=2 https://github.com/spack/spack.git
+    $ cd spack/bin
+    $ ./spack install zlib
 
+> [!TIP]
 > `-c feature.manyFiles=true` improves git's performance on repositories with 1,000+ files.
 >
 > `--depth=2` prunes the git history to reduce the size of the Spack installation.
 
-</details>
-
-```bash
-# For bash/zsh/sh
-. spack/share/spack/setup-env.sh
-
-# For tcsh/csh
-source spack/share/spack/setup-env.csh
-
-# For fish
-. spack/share/spack/setup-env.fish
-```
-
-```bash
-# Now you're ready to install a package!
-spack install zlib-ng
-```
-
 Documentation
 ----------------
 

etc/spack/defaults/config.yaml

@@ -90,9 +90,10 @@ config:
   misc_cache: $user_cache_path/cache
 
 
-  # Abort downloads after this many seconds if not data is received.
-  # Setting this to 0 will disable the timeout.
-  connect_timeout: 30
+  # Timeout in seconds used for downloading sources etc. This only applies
+  # to the connection phase and can be increased for slow connections or
+  # servers. 0 means no timeout.
+  connect_timeout: 10
 
 
   # If this is false, tools like curl that use SSL will not verify

etc/spack/defaults/darwin/concretizer.yaml

@@ -0,0 +1,2 @@
+concretizer:
+  static_analysis: true

etc/spack/defaults/darwin/packages.yaml

@@ -25,8 +25,6 @@ packages:
       glu: [apple-glu]
       unwind: [apple-libunwind]
       uuid: [apple-libuuid]
-  apple-clang:
-    buildable: false
   apple-gl:
     buildable: false
     externals:
@@ -52,11 +50,8 @@ packages:
     - spec: apple-libuuid@1353.100.2
       prefix: /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
   c:
-    prefer:
-    - apple-clang
+    require: apple-clang
   cxx:
-    prefer:
-    - apple-clang
+    require: apple-clang
   fortran:
-    prefer:
-    - gcc
+    require: gcc

etc/spack/defaults/packages.yaml

@@ -19,14 +19,14 @@ packages:
       awk: [gawk]
       armci: [armcimpi]
       blas: [openblas, amdblis]
-      c: [gcc, llvm, intel-oneapi-compilers]
-      cxx: [gcc, llvm, intel-oneapi-compilers]
+      c: [gcc, llvm, intel-oneapi-compilers, xl, aocc]
+      cxx: [gcc, llvm, intel-oneapi-compilers, xl, aocc]
       D: [ldc]
       daal: [intel-oneapi-daal]
       elf: [elfutils]
       fftw-api: [fftw, amdfftw]
       flame: [libflame, amdlibflame]
-      fortran: [gcc, llvm, intel-oneapi-compilers]
+      fortran: [gcc, llvm]
       fortran-rt: [gcc-runtime, intel-oneapi-runtime]
       fuse: [libfuse]
       gl: [glx, osmesa]
@@ -72,8 +72,6 @@ packages:
     permissions:
       read: world
       write: user
-  cce:
-    buildable: false
   cray-fftw:
     buildable: false
   cray-libsci:
@@ -88,23 +86,13 @@ packages:
     buildable: false
   essl:
     buildable: false
-  fj:
-    buildable: false
   fujitsu-mpi:
     buildable: false
   fujitsu-ssl2:
     buildable: false
-  glibc:
-    buildable: false
   hpcx-mpi:
     buildable: false
-  iconv:
-    prefer: [libiconv]
   mpt:
     buildable: false
-  musl:
-    buildable: false
   spectrum-mpi:
     buildable: false
-  xl:
-    buildable: false

etc/spack/defaults/repos.yaml

@@ -11,4 +11,4 @@
 #   ~/.spack/repos.yaml
 # -------------------------------------------------------------------------
 repos:
-  - $spack/var/spack/repos/spack_repo/builtin
+  - $spack/var/spack/repos/builtin

etc/spack/defaults/windows/packages.yaml

@@ -20,8 +20,3 @@ packages:
       cxx: [msvc]
       mpi: [msmpi]
       gl: [wgl]
-  mpi:
-    require:
-    - one_of: [msmpi]
-  msvc:
-    buildable: false

lib/spack/docs/basic_usage.rst

@@ -1291,61 +1291,55 @@ based on site policies.
 Variants
 ^^^^^^^^
 
-Variants are named options associated with a particular package and are
-typically used to enable or disable certain features at build time. They
-are optional, as each package must provide default values for each variant
-it makes available.
-
-The names of variants available for a particular package depend on
+Variants are named options associated with a particular package. They are
+optional, as each package must provide default values for each variant it
+makes available. Variants can be specified using
+a flexible parameter syntax ``name=<value>``. For example,
+``spack install mercury debug=True`` will install mercury built with debug
+flags. The names of particular variants available for a package depend on
 what was provided by the package author. ``spack info <package>`` will
 provide information on what build variants are available.
 
-There are different types of variants:
+For compatibility with earlier versions, variants which happen to be
+boolean in nature can be specified by a syntax that represents turning
+options on and off. For example, in the previous spec we could have
+supplied ``mercury +debug`` with the same effect of enabling the debug
+compile time option for the libelf package.
 
-1. Boolean variants. Typically used to enable or disable a feature at
-   compile time. For example, a package might have a ``debug`` variant that
-   can be explicitly enabled with ``+debug`` and disabled with ``~debug``.
-2. Single-valued variants. Often used to set defaults. For example, a package
-   might have a ``compression`` variant that determines the default
-   compression algorithm, which users could set to ``compression=gzip`` or
-   ``compression=zstd``.
-3. Multi-valued variants. A package might have a ``fabrics`` variant that
-   determines which network fabrics to support. Users could set this to
-   ``fabrics=verbs,ofi`` to enable both InfiniBand verbs and OpenFabrics
-   interfaces. The values are separated by commas.
+Depending on the package a variant may have any default value.  For
+``mercury`` here, ``debug`` is ``False`` by default, and we turned it on
+with ``debug=True`` or ``+debug``.  If a variant is ``True`` by default
+you can turn it off by either adding ``-name`` or ``~name`` to the spec.
 
-   The meaning of ``fabrics=verbs,ofi`` is to enable *at least* the specified
-   fabrics, but other fabrics may be enabled as well. If the intent is to
-   enable *only* the specified fabrics, then the ``fabrics:=verbs,ofi``
-   syntax should be used with the ``:=`` operator.
+There are two syntaxes here because, depending on context, ``~`` and
+``-`` may mean different things.  In most shells, the following will
+result in the shell performing home directory substitution:
 
-.. note::
+.. code-block:: sh
 
-   In certain shells, the the ``~`` character is expanded to the home
-   directory. To avoid these issues, avoid whitespace between the package
-   name and the variant:
+   mpileaks ~debug   # shell may try to substitute this!
+   mpileaks~debug    # use this instead
 
-   .. code-block:: sh
+If there is a user called ``debug``, the ``~`` will be incorrectly
+expanded.  In this situation, you would want to write ``libelf
+-debug``.  However, ``-`` can be ambiguous when included after a
+package name without spaces:
 
-      mpileaks ~debug   # shell may try to substitute this!
-      mpileaks~debug    # use this instead
+.. code-block:: sh
 
-   Alternatively, you can use the ``-`` character to disable a variant,
-   but be aware that this requires a space between the package name and
-   the variant:
+   mpileaks-debug     # wrong!
+   mpileaks -debug    # right
 
-   .. code-block:: sh
+Spack allows the ``-`` character to be part of package names, so the
+above will be interpreted as a request for the ``mpileaks-debug``
+package, not a request for ``mpileaks`` built without ``debug``
+options.  In this scenario, you should write ``mpileaks~debug`` to
+avoid ambiguity.
 
-      mpileaks-debug     # wrong: refers to a package named "mpileaks-debug"
-      mpileaks -debug    # right: refers to a package named mpileaks with debug disabled
-
-   As a last resort, ``debug=False`` can also be used to disable a boolean variant.
-
-
-
-"""""""""""""""""""""""""""""""""""
-Variant propagation to dependencies
-"""""""""""""""""""""""""""""""""""
+When spack normalizes specs, it prints them out with no spaces boolean
+variants using the backwards compatibility syntax and uses only ``~``
+for disabled boolean variants.  The ``-`` and spaces on the command
+line are provided for convenience and legibility.
 
 Spack allows variants to propagate their value to the package's
 dependency by using ``++``, ``--``, and ``~~`` for boolean variants.
@@ -1415,29 +1409,27 @@ that executables will run without the need to set ``LD_LIBRARY_PATH``.
 
 .. code-block:: yaml
 
-  packages:
-    gcc:
-      externals:
-      - spec: gcc@4.9.3
-        prefix: /opt/gcc
-        extra_attributes:
-          compilers:
-            c: /opt/gcc/bin/gcc
-            cxx: /opt/gcc/bin/g++
-            fortran: /opt/gcc/bin/gfortran
-          environment:
-            unset:
-              - BAD_VARIABLE
-            set:
-              GOOD_VARIABLE_NUM: 1
-              GOOD_VARIABLE_STR: good
-            prepend_path:
-              PATH: /path/to/binutils
-            append_path:
-              LD_LIBRARY_PATH: /opt/gcc/lib
-          extra_rpaths:
-          - /path/to/some/compiler/runtime/directory
-          - /path/to/some/other/compiler/runtime/directory
+  compilers:
+    - compiler:
+        spec: gcc@4.9.3
+        paths:
+          cc: /opt/gcc/bin/gcc
+          c++: /opt/gcc/bin/g++
+          f77: /opt/gcc/bin/gfortran
+          fc: /opt/gcc/bin/gfortran
+        environment:
+          unset:
+            - BAD_VARIABLE
+          set:
+            GOOD_VARIABLE_NUM: 1
+            GOOD_VARIABLE_STR: good
+          prepend_path:
+            PATH: /path/to/binutils
+          append_path:
+            LD_LIBRARY_PATH: /opt/gcc/lib
+        extra_rpaths:
+        - /path/to/some/compiler/runtime/directory
+        - /path/to/some/other/compiler/runtime/directory
 
 
 ^^^^^^^^^^^^^^^^^^^^^^^
@@ -1916,7 +1908,7 @@ diagnostics. Issues, if found, are reported to stdout:
    PKG-DIRECTIVES: 1 issue found
    1. lammps: wrong variant in "conflicts" directive
        the variant 'adios' does not exist
-       in /home/spack/spack/var/spack/repos/spack_repo/builtin/packages/lammps/package.py
+       in /home/spack/spack/var/spack/repos/builtin/packages/lammps/package.py
 
 
 ------------

lib/spack/docs/build_systems.rst

@@ -63,6 +63,7 @@ on these ideas for each distinct build system that Spack supports:
    build_systems/cudapackage
    build_systems/custompackage
    build_systems/inteloneapipackage
+   build_systems/intelpackage
    build_systems/rocmpackage
    build_systems/sourceforgepackage
 
@@ -83,7 +84,7 @@ packages. You can quickly find examples by running:
 
 .. code-block:: console
 
-   $ cd var/spack/repos/spack_repo/builtin/packages
+   $ cd var/spack/repos/builtin/packages
    $ grep -l QMakePackage */package.py
 
 

lib/spack/docs/build_systems/bundlepackage.rst

@@ -27,10 +27,10 @@ it could use the ``require`` directive as follows:
 
 Spack has a number of built-in bundle packages, such as:
 
-* `AmdAocl <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/amd_aocl/package.py>`_
-* `EcpProxyApps <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/ecp_proxy_apps/package.py>`_
-* `Libc <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/libc/package.py>`_
-* `Xsdk <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/xsdk/package.py>`_
+* `AmdAocl <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/amd-aocl/package.py>`_
+* `EcpProxyApps <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/ecp-proxy-apps/package.py>`_
+* `Libc <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/libc/package.py>`_
+* `Xsdk <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/xsdk/package.py>`_
 
 where ``Xsdk`` also inherits from ``CudaPackage`` and ``RocmPackage`` and
 ``Libc`` is a virtual bundle package for the C standard library.

lib/spack/docs/build_systems/cmakepackage.rst

@@ -199,7 +199,7 @@ a variant to control this:
 However, not every CMake package accepts all four of these options.
 Grep the ``CMakeLists.txt`` file to see if the default values are
 missing or replaced. For example, the
-`dealii <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/dealii/package.py>`_
+`dealii <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/dealii/package.py>`_
 package overrides the default variant with:
 
 .. code-block:: python

lib/spack/docs/build_systems/custompackage.rst

@@ -20,8 +20,8 @@ start is to look at the definitions of other build systems. This guide
 focuses mostly on how Spack's build systems work.
 
 In this guide, we will be using the
-`perl <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/perl/package.py>`_ and
-`cmake <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/cmake/package.py>`_
+`perl <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/perl/package.py>`_ and
+`cmake <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/cmake/package.py>`_
 packages as examples. ``perl``'s build system is a hand-written
 ``Configure`` shell script, while ``cmake`` bootstraps itself during
 installation. Both of these packages require custom build systems.

lib/spack/docs/build_systems/inteloneapipackage.rst

@@ -33,6 +33,9 @@ For more information on a specific package, do::
 
   spack info --all <package-name>
 
+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.
 
 Examples
 ========
@@ -47,8 +50,34 @@ Install the oneAPI compilers::
 
   spack install intel-oneapi-compilers
 
+Add the compilers to your ``compilers.yaml`` so spack can use them::
 
-To build the ``patchelf`` Spack package with ``icx``, do::
+  spack compiler add `spack location -i intel-oneapi-compilers`/compiler/latest/bin
+
+Verify that the compilers are available::
+
+  spack compiler list
+
+Note that 2024 and later releases do not include ``icc``. Before 2024,
+the package layout was different::
+  
+  spack compiler add `spack location -i intel-oneapi-compilers`/compiler/latest/linux/bin/intel64
+  spack compiler add `spack location -i intel-oneapi-compilers`/compiler/latest/linux/bin
+
+The ``intel-oneapi-compilers`` package includes 2 families of
+compilers:
+
+* ``intel``: ``icc``, ``icpc``, ``ifort``. Intel's *classic*
+  compilers. 2024 and later releases contain ``ifort``, but not
+  ``icc`` and ``icpc``.
+* ``oneapi``: ``icx``, ``icpx``, ``ifx``. Intel's new generation of
+  compilers based on LLVM.
+
+To build the ``patchelf`` Spack package with ``icc``, do::
+
+  spack install patchelf%intel
+
+To build with with ``icx``, do ::
 
   spack install patchelf%oneapi
 
@@ -63,6 +92,15 @@ Install the oneAPI compilers::
 
   spack install intel-oneapi-compilers
 
+Add the compilers to your ``compilers.yaml`` so Spack can use them::
+
+  spack compiler add `spack location -i intel-oneapi-compilers`/compiler/latest/bin
+  spack compiler add `spack location -i intel-oneapi-compilers`/compiler/latest/bin
+
+Verify that the compilers are available::
+
+  spack compiler list
+
 Clone `spack-configs <https://github.com/spack/spack-configs>`_ repo and activate Intel oneAPI CPU environment::
 
   git clone https://github.com/spack/spack-configs
@@ -111,7 +149,7 @@ Compilers
 ---------
 
 To use the compilers, add some information about the installation to
-``packages.yaml``. For most users, it is sufficient to do::
+``compilers.yaml``. For most users, it is sufficient to do::
 
   spack compiler add /opt/intel/oneapi/compiler/latest/bin
 
@@ -119,7 +157,7 @@ Adapt the paths above if you did not install the tools in the default
 location. After adding the compilers, using them is the same
 as if you had installed the ``intel-oneapi-compilers`` package.
 Another option is to manually add the configuration to
-``packages.yaml`` as described in :ref:`Compiler configuration
+``compilers.yaml`` as described in :ref:`Compiler configuration
 <compiler-config>`.
 
 Before 2024, the directory structure was different::
@@ -162,5 +200,15 @@ You can also use Spack-installed libraries. For example::
 Will update your environment CPATH, LIBRARY_PATH, and other
 environment variables for building an application with oneMKL.
 
+More information
+================
+
+This section describes basic use of oneAPI, especially if it has
+changed compared to Parallel Studio. See :ref:`intelpackage` for more
+information on :ref:`intel-virtual-packages`,
+:ref:`intel-unrelated-packages`,
+:ref:`intel-integrating-external-libraries`, and
+:ref:`using-mkl-tips`.
+
 
 .. _`Intel installers`: https://software.intel.com/content/www/us/en/develop/documentation/installation-guide-for-intel-oneapi-toolkits-linux/top.html

lib/spack/docs/build_systems/makefilepackage.rst

@@ -91,14 +91,14 @@ there are any other variables you need to set, you can do this in the
 
 .. code-block:: python
 
-   def setup_build_environment(self, env: EnvironmentModifications) -> None:
+   def setup_build_environment(self, env):
        env.set("PREFIX", prefix)
        env.set("BLASLIB", spec["blas"].libs.ld_flags)
 
 
-`cbench <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/cbench/package.py>`_
+`cbench <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/cbench/package.py>`_
 is a good example of a simple package that does this, while
-`esmf <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/esmf/package.py>`_
+`esmf <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/esmf/package.py>`_
 is a good example of a more complex package.
 
 """"""""""""""""""""""
@@ -129,7 +129,7 @@ If you do need access to the spec, you can create a property like so:
        ]
 
 
-`cloverleaf <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/cloverleaf/package.py>`_
+`cloverleaf <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/cloverleaf/package.py>`_
 is a good example of a package that uses this strategy.
 
 """""""""""""
@@ -152,7 +152,7 @@ and a ``filter`` method to help with this. For example:
        makefile.filter(r"^\s*FC\s*=.*",  f"FC = {spack_fc}")
 
 
-`stream <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/stream/package.py>`_
+`stream <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/stream/package.py>`_
 is a good example of a package that involves editing a Makefile to set
 the appropriate variables.
 
@@ -192,7 +192,7 @@ well for storing variables:
                inc.write(f"{key} = {config[key]}\n")
 
 
-`elk <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/elk/package.py>`_
+`elk <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/elk/package.py>`_
 is a good example of a package that uses a dictionary to store
 configuration variables.
 
@@ -213,7 +213,7 @@ them in a list:
                inc.write(f"{var}\n")
 
 
-`hpl <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/hpl/package.py>`_
+`hpl <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/hpl/package.py>`_
 is a good example of a package that uses a list to store
 configuration variables.
 

lib/spack/docs/build_systems/rocmpackage.rst

@@ -12,7 +12,8 @@ The ``ROCmPackage`` is not a build system but a helper package. Like ``CudaPacka
 it provides standard variants, dependencies, and conflicts to facilitate building
 packages using GPUs though for AMD in this case.
 
-You can find the source for this package (and suggestions for setting up your ``packages.yaml`` file) at
+You can find the source for this package (and suggestions for setting up your
+``compilers.yaml`` and ``packages.yaml`` files) at
 `<https://github.com/spack/spack/blob/develop/lib/spack/spack/build_systems/rocm.py>`__.
 
 ^^^^^^^^

lib/spack/docs/build_systems/rpackage.rst

@@ -39,7 +39,7 @@ for "CRAN <package-name>" and you should quickly find what you want.
 If it isn't on CRAN, try Bioconductor, another common R repository.
 
 For the purposes of this tutorial, we will be walking through
-`r-caret <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/r_caret/package.py>`_
+`r-caret <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/r-caret/package.py>`_
 as an example. If you search for "CRAN caret", you will quickly find what
 you are looking for at https://cran.r-project.org/package=caret.
 https://cran.r-project.org is the main CRAN website. However, CRAN also
@@ -337,7 +337,7 @@ Non-R dependencies
 ^^^^^^^^^^^^^^^^^^
 
 Some packages depend on non-R libraries for linking. Check out the
-`r-stringi <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/r_stringi/package.py>`_
+`r-stringi <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/r-stringi/package.py>`_
 package for an example: https://cloud.r-project.org/package=stringi.
 If you search for the text "SystemRequirements", you will see:
 
@@ -352,7 +352,7 @@ Passing arguments to the installation
 
 Some R packages provide additional flags that can be passed to
 ``R CMD INSTALL``, often to locate non-R dependencies.
-`r-rmpi <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/r_rmpi/package.py>`_
+`r-rmpi <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/r-rmpi/package.py>`_
 is an example of this, and flags for linking to an MPI library. To pass
 these to the installation command, you can override ``configure_args``
 like so:

lib/spack/docs/build_systems/sconspackage.rst

@@ -104,10 +104,10 @@ Finding available options
 
 The first place to start when looking for a list of valid options to
 build a package is ``scons --help``. Some packages like
-`kahip <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/kahip/package.py>`_
+`kahip <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/kahip/package.py>`_
 don't bother overwriting the default SCons help message, so this isn't
 very useful, but other packages like
-`serf <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/serf/package.py>`_
+`serf <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/serf/package.py>`_
 print a list of valid command-line variables:
 
 .. code-block:: console
@@ -177,7 +177,7 @@ print a list of valid command-line variables:
 
 
 More advanced packages like
-`cantera <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/cantera/package.py>`_
+`cantera <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/cantera/package.py>`_
 use ``scons --help`` to print a list of subcommands:
 
 .. code-block:: console

lib/spack/docs/conf.py

@@ -225,14 +225,8 @@ def setup(sphinx):
     ("py:class", "llnl.util.lang.T"),
     ("py:class", "llnl.util.lang.KT"),
     ("py:class", "llnl.util.lang.VT"),
-    ("py:class", "llnl.util.lang.K"),
-    ("py:class", "llnl.util.lang.V"),
-    ("py:class", "llnl.util.lang.ClassPropertyType"),
     ("py:obj", "llnl.util.lang.KT"),
     ("py:obj", "llnl.util.lang.VT"),
-    ("py:obj", "llnl.util.lang.ClassPropertyType"),
-    ("py:obj", "llnl.util.lang.K"),
-    ("py:obj", "llnl.util.lang.V"),
 ]
 
 # The reST default role (used for this markup: `text`) to use for all documents.

lib/spack/docs/config_yaml.rst

@@ -148,16 +148,15 @@ this can expose you to attacks.  Use at your own risk.
 ``ssl_certs``
 --------------------
 
-Path to custom certificats for SSL verification. The value can be a
+Path to custom certificats for SSL verification. The value can be a 
 filesytem path, or an environment variable that expands to an absolute file path.
 The default value is set to the environment variable ``SSL_CERT_FILE``
 to use the same syntax used by many other applications that automatically
 detect custom certificates.
 When ``url_fetch_method:curl`` the ``config:ssl_certs`` should resolve to
 a single file.  Spack will then set the environment variable ``CURL_CA_BUNDLE``
-in the subprocess calling ``curl``. If additional ``curl`` arguments are required,
-they can be set in the config, e.g. ``url_fetch_method:'curl -k -q'``.
-If ``url_fetch_method:urllib`` then files and directories are supported i.e.
+in the subprocess calling ``curl``.
+If ``url_fetch_method:urllib`` then files and directories are supported i.e. 
 ``config:ssl_certs:$SSL_CERT_FILE`` or ``config:ssl_certs:$SSL_CERT_DIR``
 will work.
 In all cases the expanded path must be absolute for Spack to use the certificates.

lib/spack/docs/configuration.rst

@@ -11,10 +11,9 @@ Configuration Files
 Spack has many configuration files.  Here is a quick list of them, in
 case you want to skip directly to specific docs:
 
-* :ref:`packages.yaml <compiler-config>`
+* :ref:`compilers.yaml <compiler-config>`
 * :ref:`concretizer.yaml <concretizer-options>`
 * :ref:`config.yaml <config-yaml>`
-* :ref:`include.yaml <include-yaml>`
 * :ref:`mirrors.yaml <mirrors>`
 * :ref:`modules.yaml <modules>`
 * :ref:`packages.yaml <packages-config>`
@@ -46,12 +45,6 @@ Each Spack configuration file is nested under a top-level section
 corresponding to its name. So, ``config.yaml`` starts with ``config:``,
 ``mirrors.yaml`` starts with ``mirrors:``, etc.
 
-.. tip::
-
-   Validation and autocompletion of Spack config files can be enabled in
-   your editor with the YAML language server. See `spack/schemas
-   <https://github.com/spack/schemas>`_ for more information.
-
 .. _configuration-scopes:
 
 --------------------
@@ -101,7 +94,7 @@ are six configuration scopes. From lowest to highest:
    precedence over all other scopes.
 
 Each configuration directory may contain several configuration files,
-such as ``config.yaml``, ``packages.yaml``, or ``mirrors.yaml``.  When
+such as ``config.yaml``, ``compilers.yaml``, or ``mirrors.yaml``.  When
 configurations conflict, settings from higher-precedence scopes override
 lower-precedence settings.
 

lib/spack/docs/contribution_guide.rst

@@ -226,9 +226,9 @@ If all is well, you'll see something like this:
 
    Modified files:
 
-     var/spack/repos/spack_repo/builtin/packages/hdf5/package.py
-     var/spack/repos/spack_repo/builtin/packages/hdf/package.py
-     var/spack/repos/spack_repo/builtin/packages/netcdf/package.py
+     var/spack/repos/builtin/packages/hdf5/package.py
+     var/spack/repos/builtin/packages/hdf/package.py
+     var/spack/repos/builtin/packages/netcdf/package.py
    =======================================================
    Flake8 checks were clean.
 
@@ -236,9 +236,9 @@ However, if you aren't compliant with PEP 8, flake8 will complain:
 
 .. code-block:: console
 
-   var/spack/repos/spack_repo/builtin/packages/netcdf/package.py:26: [F401] 'os' imported but unused
-   var/spack/repos/spack_repo/builtin/packages/netcdf/package.py:61: [E303] too many blank lines (2)
-   var/spack/repos/spack_repo/builtin/packages/netcdf/package.py:106: [E501] line too long (92 > 79 characters)
+   var/spack/repos/builtin/packages/netcdf/package.py:26: [F401] 'os' imported but unused
+   var/spack/repos/builtin/packages/netcdf/package.py:61: [E303] too many blank lines (2)
+   var/spack/repos/builtin/packages/netcdf/package.py:106: [E501] line too long (92 > 79 characters)
    Flake8 found errors.
 
 Most of the error messages are straightforward, but if you don't understand what
@@ -280,7 +280,7 @@ All of these can be installed with Spack, e.g.
 
 .. warning::
 
-   Sphinx has `several required dependencies <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/py-sphinx/package.py>`_.
+   Sphinx has `several required dependencies <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/py-sphinx/package.py>`_.
    If you're using a ``python`` from Spack and you installed
    ``py-sphinx`` and friends, you need to make them available to your
    ``python``. The easiest way to do this is to run:

lib/spack/docs/developer_guide.rst

@@ -154,7 +154,9 @@ Package-related modules
 
 :mod:`spack.util.naming`
   Contains functions for mapping between Spack package names,
-  Python module names, and Python class names.
+  Python module names, and Python class names. Functions like
+  :func:`~spack.util.naming.mod_to_class` handle mapping package
+  module names to class names.
 
 :mod:`spack.directives`
   *Directives* are functions that can be called inside a package definition

lib/spack/docs/env_vars_yaml.rst

@@ -1,34 +0,0 @@
-.. Copyright Spack Project Developers. See COPYRIGHT file for details.
-
-   SPDX-License-Identifier: (Apache-2.0 OR MIT)
-
-.. _env-vars-yaml:
-
-=============================================
-Environment Variable Settings (env_vars.yaml)
-=============================================
-
-Spack allows you to include shell environment variable modifications
-for a spack environment by including an ``env_vars.yaml``.  Environment
-varaibles can be modified by setting, unsetting, appending, and prepending
-variables in the shell environment.
-The changes to the shell environment will take effect when the spack
-environment is activated.
-
-for example,
-
-.. code-block:: yaml
-
-  env_vars:
-    set:
-      ENVAR_TO_SET_IN_ENV_LOAD: "FOO"
-    unset:
-      ENVAR_TO_UNSET_IN_ENV_LOAD:
-    prepend_path:
-      PATH_LIST: "path/to/prepend"
-    append_path:
-      PATH_LIST: "path/to/append"
-    remove_path:
-      PATH_LIST: "path/to/remove"
-
-

lib/spack/docs/environments.rst

@@ -457,13 +457,6 @@ developed package in the environment are concretized to match the
 version (and other constraints) passed as the spec argument to the
 ``spack develop`` command.
 
-When working deep in the graph it is often desirable to have multiple specs marked
-as ``develop`` so you don't have to restage and/or do full rebuilds each time you
-call ``spack install``.  The ``--recursive`` flag can be used in these scenarios
-to ensure that all the dependents of the initial spec you provide are also marked
-as develop specs.  The ``--recursive`` flag requires a pre-concretized environment
-so the graph can be traversed from the supplied spec all the way to the root specs.
-
 For packages with ``git`` attributes, git branches, tags, and commits can
 also be used as valid concrete versions (see :ref:`version-specifier`).
 This means that for a package ``foo``, ``spack develop foo@git.main`` will clone
@@ -667,56 +660,34 @@ a ``packages.yaml`` file) could contain:
      # ...
      packages:
        all:
-         providers:
-           mpi: [openmpi]
+         compiler: [intel]
      # ...
 
-This configuration sets the default mpi provider to be openmpi.
+This configuration sets the default compiler for all packages to
+``intel``.
 
 ^^^^^^^^^^^^^^^^^^^^^^^
 Included configurations
 ^^^^^^^^^^^^^^^^^^^^^^^
 
-Spack environments allow an ``include`` heading in their yaml schema.
-This heading pulls in external configuration files and applies them to
-the environment.
+Spack environments allow an ``include`` heading in their yaml
+schema. This heading pulls in external configuration files and applies
+them to the environment.
 
 .. code-block:: yaml
 
    spack:
      include:
-     - environment/relative/path/to/config.yaml
-     - path: https://github.com/path/to/raw/config/compilers.yaml
-       sha256: 26e871804a92cd07bb3d611b31b4156ae93d35b6a6d6e0ef3a67871fcb1d258b
+     - relative/path/to/config.yaml
+     - https://github.com/path/to/raw/config/compilers.yaml
      - /absolute/path/to/packages.yaml
-     - path: /path/to/$os/$target/environment
-       optional: true
-     - path: /path/to/os-specific/config-dir
-       when: os == "ventura"
-
-Included configuration files are required *unless* they are explicitly optional
-or the entry's condition evaluates to ``false``. Optional includes are specified
-with the ``optional`` clause and conditional with the ``when`` clause. (See
-:ref:`include-yaml` for more information on optional and conditional entries.)
-
-Files are listed using paths to individual files or directories containing them.
-Path entries may be absolute or relative to the environment or specified as 
-URLs. URLs to individual files must link to the **raw** form of the file's 
-contents (e.g., `GitHub
-<https://docs.github.com/en/repositories/working-with-files/using-files/viewing-and-understanding-files#viewing-or-copying-the-raw-file-content>`_ 
-or `GitLab
-<https://docs.gitlab.com/ee/api/repository_files.html#get-raw-file-from-repository>`_) **and** include a valid sha256 for the file.
-Only the ``file``, ``ftp``, ``http`` and ``https`` protocols (or schemes) are
-supported. Spack-specific, environment and user path variables can be used.
-(See :ref:`config-file-variables` for more information.)
-
-.. warning::
-
-   Recursive includes are not currently processed in a breadth-first manner
-   so the value of a configuration option that is altered by multiple included
-   files may not be what you expect. This will be addressed in a future
-   update.
 
+Environments can include files or URLs. File paths can be relative or
+absolute. URLs include the path to the text for individual files or
+can be the path to a directory containing configuration files.
+Spack supports ``file``, ``http``, ``https`` and ``ftp`` protocols (or
+schemes). Spack-specific, environment and user path variables may be
+used in these paths. See :ref:`config-file-variables` for more information.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^
 Configuration precedence
@@ -1000,28 +971,6 @@ For example, the following environment has three root packages:
 This allows for a much-needed reduction in redundancy between packages
 and constraints.
 
--------------------------------
-Modifying Environment Variables
--------------------------------
-
-Spack Environments can modify the active shell's environment variables when activated.  The environment can be
-configured to set, unset, prepend, or append using ``env_vars`` configuration in the ``spack.yaml``  or through config scopes
-file:
-
-.. code-block:: yaml
-
-  spack:
-    env_vars:
-      set:
-        ENVAR_TO_SET_IN_ENV_LOAD: "FOO"
-      unset:
-        ENVAR_TO_UNSET_IN_ENV_LOAD:
-      prepend_path:
-        PATH_LIST: "path/to/prepend"
-      append_path:
-        PATH_LIST: "path/to/append"
-      remove_path:
-        PATH_LIST: "path/to/remove"
 
 -----------------
 Environment Views

lib/spack/docs/example_files/spack.yaml

@@ -0,0 +1,161 @@
+spack:
+  definitions:
+  - compiler-pkgs:
+    - 'llvm+clang@6.0.1 os=centos7'
+    - 'gcc@6.5.0 os=centos7'
+    - 'llvm+clang@6.0.1 os=ubuntu18.04'
+    - 'gcc@6.5.0 os=ubuntu18.04'
+  - pkgs:
+    - readline@7.0
+    # - xsdk@0.4.0
+  - compilers:
+    - '%gcc@5.5.0'
+    - '%gcc@6.5.0'
+    - '%gcc@7.3.0'
+    - '%clang@6.0.0'
+    - '%clang@6.0.1'
+  - oses:
+    - os=ubuntu18.04
+    - os=centos7
+
+  specs:
+  - matrix:
+    - [$pkgs]
+    - [$compilers]
+    - [$oses]
+    exclude:
+      - '%gcc@7.3.0 os=centos7'
+      - '%gcc@5.5.0 os=ubuntu18.04'
+
+  mirrors:
+    cloud_gitlab: https://mirror.spack.io
+
+  compilers:
+    # The .gitlab-ci.yml for this project picks a Docker container which does
+    # not have any compilers pre-built and ready to use, so we need to fake the
+    # existence of those here.
+    - compiler:
+        operating_system: centos7
+        modules: []
+        paths:
+          cc: /not/used
+          cxx: /not/used
+          f77: /not/used
+          fc: /not/used
+        spec: gcc@5.5.0
+        target: x86_64
+    - compiler:
+        operating_system: centos7
+        modules: []
+        paths:
+          cc: /not/used
+          cxx: /not/used
+          f77: /not/used
+          fc: /not/used
+        spec: gcc@6.5.0
+        target: x86_64
+    - compiler:
+        operating_system: centos7
+        modules: []
+        paths:
+          cc: /not/used
+          cxx: /not/used
+          f77: /not/used
+          fc: /not/used
+        spec: clang@6.0.0
+        target: x86_64
+    - compiler:
+        operating_system: centos7
+        modules: []
+        paths:
+          cc: /not/used
+          cxx: /not/used
+          f77: /not/used
+          fc: /not/used
+        spec: clang@6.0.1
+        target: x86_64
+
+    - compiler:
+        operating_system: ubuntu18.04
+        modules: []
+        paths:
+          cc: /not/used
+          cxx: /not/used
+          f77: /not/used
+          fc: /not/used
+        spec: clang@6.0.0
+        target: x86_64
+    - compiler:
+        operating_system: ubuntu18.04
+        modules: []
+        paths:
+          cc: /not/used
+          cxx: /not/used
+          f77: /not/used
+          fc: /not/used
+        spec: clang@6.0.1
+        target: x86_64
+    - compiler:
+        operating_system: ubuntu18.04
+        modules: []
+        paths:
+          cc: /not/used
+          cxx: /not/used
+          f77: /not/used
+          fc: /not/used
+        spec: gcc@6.5.0
+        target: x86_64
+    - compiler:
+        operating_system: ubuntu18.04
+        modules: []
+        paths:
+          cc: /not/used
+          cxx: /not/used
+          f77: /not/used
+          fc: /not/used
+        spec: gcc@7.3.0
+        target: x86_64
+
+  gitlab-ci:
+    bootstrap:
+      - name: compiler-pkgs
+        compiler-agnostic: true
+    mappings:
+      - # spack-cloud-ubuntu
+        match:
+          # these are specs, if *any* match the spec under consideration, this
+          # 'mapping' will be used to generate the CI job
+          - os=ubuntu18.04
+        runner-attributes:
+          # 'tags' and 'image' go directly onto the job, 'variables' will
+          # be added to what we already necessarily create for the job as
+          # a part of the CI workflow
+          tags:
+            - spack-k8s
+          image:
+            name: scottwittenburg/spack_builder_ubuntu_18.04
+            entrypoint: [""]
+      - # spack-cloud-centos
+        match:
+          # these are specs, if *any* match the spec under consideration, this
+          # 'mapping' will be used to generate the CI job
+          - 'os=centos7'
+        runner-attributes:
+          tags:
+            - spack-k8s
+          image:
+            name: scottwittenburg/spack_builder_centos_7
+            entrypoint: [""]
+
+  cdash:
+    build-group: Release Testing
+    url: http://cdash
+    project: Spack Testing
+    site: Spack Docker-Compose Workflow
+
+  repos: []
+  upstreams: {}
+  modules:
+    enable: []
+  packages: {}
+  config: {}

lib/spack/docs/features.rst

@@ -131,7 +131,7 @@ creates a simple python file:
 It doesn't take much python coding to get from there to a working
 package:
 
-.. literalinclude:: _spack_root/var/spack/repos/spack_repo/builtin/packages/libelf/package.py
+.. literalinclude:: _spack_root/var/spack/repos/builtin/packages/libelf/package.py
    :lines: 5-
 
 Spack also provides wrapper functions around common commands like

lib/spack/docs/frequently_asked_questions.rst

@@ -30,7 +30,7 @@ than always choosing the latest versions or default variants.
 
 .. note::
 
-    As a rule of thumb: requirements + constraints > strong preferences > reuse > preferences > defaults.
+    As a rule of thumb: requirements + constraints > reuse > preferences > defaults.
 
 The following set of criteria (from lowest to highest precedence) explain
 common cases where concretization output may seem surprising at first.
@@ -56,19 +56,7 @@ common cases where concretization output may seem surprising at first.
       concretizer:
         reuse: dependencies  # other options are 'true' and 'false'
 
-3. :ref:`Strong preferences <package-strong-preferences>` configured in ``packages.yaml``
-   are higher priority than reuse, and can be used to strongly prefer a specific version
-   or variant, without erroring out if it's not possible. Strong preferences are specified
-   as follows:
-
-   .. code-block:: yaml
-
-      packages:
-        foo:
-          prefer:
-          - "@1.1: ~mpi"
-
-4. :ref:`Package requirements <package-requirements>` configured in ``packages.yaml``,
+3. :ref:`Package requirements <package-requirements>` configured in ``packages.yaml``,
    and constraints from the command line as well as ``package.py`` files override all
    of the above. Requirements are specified as follows:
 
@@ -78,8 +66,6 @@ common cases where concretization output may seem surprising at first.
         foo:
           require:
           - "@1.2: +mpi"
-          conflicts:
-          - "@1.4"
 
 Requirements and constraints restrict the set of possible solutions, while reuse
 behavior and preferences influence what an optimal solution looks like.

lib/spack/docs/getting_started.rst

@@ -254,11 +254,12 @@ directory.
 Compiler configuration
 ----------------------
 
-Spack has the ability to build packages with multiple compilers and compiler versions.
-Compilers can be made available to Spack by specifying them manually in ``packages.yaml``,
-or automatically by running ``spack compiler find``.
-For convenience, Spack will automatically detect compilers the first time it needs them,
-if none is available.
+Spack has the ability to build packages with multiple compilers and
+compiler versions. Compilers can be made available to Spack by
+specifying them manually in ``compilers.yaml`` or ``packages.yaml``,
+or automatically by running ``spack compiler find``, but for
+convenience Spack will automatically detect compilers the first time
+it needs them.
 
 .. _cmd-spack-compilers:
 
@@ -273,11 +274,16 @@ compilers`` or ``spack compiler list``:
 
    $ spack compilers
    ==> Available compilers
-   -- gcc ubuntu20.04-x86_64 ---------------------------------------
-   gcc@9.4.0  gcc@8.4.0  gcc@10.5.0
-
-   -- llvm ubuntu20.04-x86_64 --------------------------------------
-   llvm@12.0.0  llvm@11.0.0  llvm@10.0.0
+   -- gcc ---------------------------------------------------------
+       gcc@4.9.0  gcc@4.8.0  gcc@4.7.0  gcc@4.6.2  gcc@4.4.7
+       gcc@4.8.2  gcc@4.7.1  gcc@4.6.3  gcc@4.6.1  gcc@4.1.2
+   -- intel -------------------------------------------------------
+       intel@15.0.0  intel@14.0.0  intel@13.0.0  intel@12.1.0  intel@10.0
+       intel@14.0.3  intel@13.1.1  intel@12.1.5  intel@12.0.4  intel@9.1
+       intel@14.0.2  intel@13.1.0  intel@12.1.3  intel@11.1
+       intel@14.0.1  intel@13.0.1  intel@12.1.2  intel@10.1
+   -- clang -------------------------------------------------------
+       clang@3.4  clang@3.3  clang@3.2  clang@3.1
 
 Any of these compilers can be used to build Spack packages.  More on
 how this is done is in :ref:`sec-specs`.
@@ -296,22 +302,16 @@ An alias for ``spack compiler find``.
 ``spack compiler find``
 ^^^^^^^^^^^^^^^^^^^^^^^
 
-If you do not see a compiler in the list shown by:
+Lists the compilers currently available to Spack. If you do not see
+a compiler in this list, but you want to use it with Spack, you can
+simply run ``spack compiler find`` with the path to where the
+compiler is installed.  For example:
 
 .. code-block:: console
 
-   $ spack compiler list
-
-but you want to use it with Spack, you can simply run ``spack compiler find`` with the
-path to where the compiler is installed.  For example:
-
-.. code-block:: console
-
-   $ spack compiler find /opt/intel/oneapi/compiler/2025.1/bin/
-   ==> Added 1 new compiler to /home/user/.spack/packages.yaml
-       intel-oneapi-compilers@2025.1.0
-   ==> Compilers are defined in the following files:
-       /home/user/.spack/packages.yaml
+   $ spack compiler find /usr/local/tools/ic-13.0.079
+   ==> Added 1 new compiler to ~/.spack/linux/compilers.yaml
+       intel@13.0.079
 
 Or you can run ``spack compiler find`` with no arguments to force
 auto-detection.  This is useful if you do not know where compilers are
@@ -322,7 +322,7 @@ installed, but you know that new compilers have been added to your
 
    $ module load gcc/4.9.0
    $ spack compiler find
-   ==> Added 1 new compiler to /home/user/.spack/packages.yaml
+   ==> Added 1 new compiler to ~/.spack/linux/compilers.yaml
        gcc@4.9.0
 
 This loads the environment module for gcc-4.9.0 to add it to
@@ -331,7 +331,7 @@ This loads the environment module for gcc-4.9.0 to add it to
 .. note::
 
    By default, spack does not fill in the ``modules:`` field in the
-   ``packages.yaml`` file.  If you are using a compiler from a
+   ``compilers.yaml`` file.  If you are using a compiler from a
    module, then you should add this field manually.
    See the section on :ref:`compilers-requiring-modules`.
 
@@ -341,82 +341,91 @@ This loads the environment module for gcc-4.9.0 to add it to
 ``spack compiler info``
 ^^^^^^^^^^^^^^^^^^^^^^^
 
-If you want to see additional information on some specific compilers, you can run ``spack compiler info`` on it:
+If you want to see specifics on a particular compiler, you can run
+``spack compiler info`` on it:
 
 .. code-block:: console
 
-   $ spack compiler info gcc
-   gcc@=8.4.0 languages='c,c++,fortran' arch=linux-ubuntu20.04-x86_64:
-     prefix: /usr
-     compilers:
-       c: /usr/bin/gcc-8
-       cxx: /usr/bin/g++-8
-       fortran: /usr/bin/gfortran-8
+   $ spack compiler info intel@15
+   intel@15.0.0:
+     paths:
+       cc  = /usr/local/bin/icc-15.0.090
+       cxx = /usr/local/bin/icpc-15.0.090
+       f77 = /usr/local/bin/ifort-15.0.090
+       fc  = /usr/local/bin/ifort-15.0.090
+     modules = []
+     operating_system = centos6
+   ...
 
-   gcc@=9.4.0 languages='c,c++,fortran' arch=linux-ubuntu20.04-x86_64:
-     prefix: /usr
-     compilers:
-       c: /usr/bin/gcc
-       cxx: /usr/bin/g++
-       fortran: /usr/bin/gfortran
-
-   gcc@=10.5.0 languages='c,c++,fortran' arch=linux-ubuntu20.04-x86_64:
-     prefix: /usr
-     compilers:
-       c: /usr/bin/gcc-10
-       cxx: /usr/bin/g++-10
-       fortran: /usr/bin/gfortran-10
-
-This shows the details of the compilers that were detected by Spack.
-Notice also that we didn't have to be too specific about the version. We just said ``gcc``, and we got information
-about all the matching compilers.
+This shows which C, C++, and Fortran compilers were detected by Spack.
+Notice also that we didn't have to be too specific about the
+version. We just said ``intel@15``, and information about the only
+matching Intel compiler was displayed.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Manual compiler configuration
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-If auto-detection fails, you can manually configure a compiler by editing your ``~/.spack/packages.yaml`` file.
-You can do this by running ``spack config edit packages``, which will open the file in
+If auto-detection fails, you can manually configure a compiler by
+editing your ``~/.spack/<platform>/compilers.yaml`` file.  You can do this by running
+``spack config edit compilers``, which will open the file in
 :ref:`your favorite editor <controlling-the-editor>`.
 
-Each compiler has an "external" entry in the file with some ``extra_attributes``:
+Each compiler configuration in the file looks like this:
 
 .. code-block:: yaml
 
-   packages:
-     gcc:
-       externals:
-       - spec: gcc@10.5.0 languages='c,c++,fortran'
-         prefix: /usr
-         extra_attributes:
-           compilers:
-             c: /usr/bin/gcc-10
-             cxx: /usr/bin/g++-10
-             fortran: /usr/bin/gfortran-10
+   compilers:
+   - compiler:
+       modules: []
+       operating_system: centos6
+       paths:
+         cc: /usr/local/bin/icc-15.0.024-beta
+         cxx: /usr/local/bin/icpc-15.0.024-beta
+         f77: /usr/local/bin/ifort-15.0.024-beta
+         fc: /usr/local/bin/ifort-15.0.024-beta
+       spec: intel@15.0.0
 
-The compiler executables are listed under ``extra_attributes:compilers``, and are keyed by language.
-Once you save the file, the configured compilers will show up in the list displayed by ``spack compilers``.
+For compilers that do not support Fortran (like ``clang``), put
+``None`` for ``f77`` and ``fc``:
 
-You can also add compiler flags to manually configured compilers. These flags should be specified in the
-``flags`` section of the compiler specification. The valid flags are ``cflags``, ``cxxflags``, ``fflags``,
+.. code-block:: yaml
+
+   compilers:
+   - compiler:
+       modules: []
+       operating_system: centos6
+       paths:
+         cc: /usr/bin/clang
+         cxx: /usr/bin/clang++
+         f77: None
+         fc: None
+       spec: clang@3.3svn
+
+Once you save the file, the configured compilers will show up in the
+list displayed by ``spack compilers``.
+
+You can also add compiler flags to manually configured compilers. These
+flags should be specified in the ``flags`` section of the compiler
+specification. The valid flags are ``cflags``, ``cxxflags``, ``fflags``,
 ``cppflags``, ``ldflags``, and ``ldlibs``. For example:
 
 .. code-block:: yaml
 
-   packages:
-     gcc:
-       externals:
-       - spec: gcc@10.5.0 languages='c,c++,fortran'
-         prefix: /usr
-         extra_attributes:
-           compilers:
-             c: /usr/bin/gcc-10
-             cxx: /usr/bin/g++-10
-             fortran: /usr/bin/gfortran-10
-           flags:
-             cflags: -O3 -fPIC
-             cxxflags: -O3 -fPIC
-             cppflags: -O3 -fPIC
+   compilers:
+   - compiler:
+       modules: []
+       operating_system: centos6
+       paths:
+         cc: /usr/bin/gcc
+         cxx: /usr/bin/g++
+         f77: /usr/bin/gfortran
+         fc: /usr/bin/gfortran
+       flags:
+         cflags: -O3 -fPIC
+         cxxflags: -O3 -fPIC
+         cppflags: -O3 -fPIC
+       spec: gcc@4.7.2
 
 These flags will be treated by spack as if they were entered from
 the command line each time this compiler is used. The compiler wrappers
@@ -431,44 +440,95 @@ These variables should be specified in the ``environment`` section of the compil
 specification. The operations available to modify the environment are ``set``, ``unset``,
 ``prepend_path``, ``append_path``, and ``remove_path``. For example:
 
+.. code-block:: yaml
+
+   compilers:
+   - compiler:
+       modules: []
+       operating_system: centos6
+       paths:
+         cc: /opt/intel/oneapi/compiler/latest/linux/bin/icx
+         cxx: /opt/intel/oneapi/compiler/latest/linux/bin/icpx
+         f77: /opt/intel/oneapi/compiler/latest/linux/bin/ifx
+         fc: /opt/intel/oneapi/compiler/latest/linux/bin/ifx
+       spec: oneapi@latest
+       environment:
+         set:
+           MKL_ROOT: "/path/to/mkl/root"
+         unset: # A list of environment variables to unset
+           - CC
+         prepend_path: # Similar for append|remove_path
+           LD_LIBRARY_PATH: /ld/paths/added/by/setvars/sh
+
+.. note::
+
+   Spack is in the process of moving compilers from a separate
+   attribute to be handled like all other packages. As part of this
+   process, the ``compilers.yaml`` section will eventually be replaced
+   by configuration in the ``packages.yaml`` section. This new
+   configuration is now available, although it is not yet the default
+   behavior.
+
+Compilers can also be configured as external packages in the
+``packages.yaml`` config file. Any external package for a compiler
+(e.g. ``gcc`` or ``llvm``) will be treated as a configured compiler
+assuming the paths to the compiler executables are determinable from
+the prefix.
+
+If the paths to the compiler executable are not determinable from the
+prefix, you can add them to the ``extra_attributes`` field. Similarly,
+all other fields from the compilers config can be added to the
+``extra_attributes`` field for an external representing a compiler.
+
+Note that the format for the ``paths`` field in the
+``extra_attributes`` section is different than in the ``compilers``
+config. For compilers configured as external packages, the section is
+named ``compilers`` and the dictionary maps language names (``c``,
+``cxx``, ``fortran``) to paths, rather than using the names ``cc``,
+``fc``, and ``f77``.
+
 .. code-block:: yaml
 
    packages:
-     intel-oneapi-compilers:
-       externals:
-       - spec: intel-oneapi-compilers@2025.1.0
-         prefix: /opt/intel/oneapi
+     gcc:
+       external:
+       - spec: gcc@12.2.0 arch=linux-rhel8-skylake
+         prefix: /usr
          extra_attributes:
-           compilers:
-             c: /opt/intel/oneapi/compiler/2025.1/bin/icx
-             cxx: /opt/intel/oneapi/compiler/2025.1/bin/icpx
-             fortran: /opt/intel/oneapi/compiler/2025.1/bin/ifx
            environment:
              set:
-               MKL_ROOT: "/path/to/mkl/root"
-             unset: # A list of environment variables to unset
-               - CC
-             prepend_path: # Similar for append|remove_path
-               LD_LIBRARY_PATH: /ld/paths/added/by/setvars/sh
+               GCC_ROOT: /usr
+       external:
+       - spec: llvm+clang@15.0.0 arch=linux-rhel8-skylake
+         prefix: /usr
+         extra_attributes:
+           compilers:
+             c: /usr/bin/clang-with-suffix
+             cxx: /usr/bin/clang++-with-extra-info
+             fortran: /usr/bin/gfortran
+           extra_rpaths:
+           - /usr/lib/llvm/
 
 ^^^^^^^^^^^^^^^^^^^^^^^
 Build Your Own Compiler
 ^^^^^^^^^^^^^^^^^^^^^^^
 
-If you are particular about which compiler/version you use, you might wish to have Spack build it for you.
-For example:
+If you are particular about which compiler/version you use, you might
+wish to have Spack build it for you.  For example:
 
 .. code-block:: console
 
-   $ spack install gcc@14+binutils
+   $ spack install gcc@4.9.3
 
-Once the compiler is installed, you can start using it without additional configuration:
+Once that has finished, you will need to add it to your
+``compilers.yaml`` file.  You can then set Spack to use it by default
+by adding the following to your ``packages.yaml`` file:
 
-.. code-block:: console
+.. code-block:: yaml
 
-   $ spack install hdf5~mpi %gcc@14
-
-The same holds true for compilers that are made available from buildcaches, when reusing them is allowed.
+   packages:
+     all:
+       compiler: [gcc@4.9.3]
 
 .. _compilers-requiring-modules:
 
@@ -476,26 +536,30 @@ The same holds true for compilers that are made available from buildcaches, when
 Compilers Requiring Modules
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Many installed compilers will work regardless of the environment they are called with.
-However, some installed compilers require environment variables to be set in order to run;
-this is typical for Intel and other proprietary compilers.
+Many installed compilers will work regardless of the environment they
+are called with.  However, some installed compilers require
+``$LD_LIBRARY_PATH`` or other environment variables to be set in order
+to run; this is typical for Intel and other proprietary compilers.
 
-On typical HPC clusters, these environment modifications are usually delegated to some "module" system.
-In such a case, you should tell Spack which module(s) to load in order to run the chosen compiler:
+In such a case, you should tell Spack which module(s) to load in order
+to run the chosen compiler (If the compiler does not come with a
+module file, you might consider making one by hand).  Spack will load
+this module into the environment ONLY when the compiler is run, and
+NOT in general for a package's ``install()`` method.  See, for
+example, this ``compilers.yaml`` file:
 
 .. code-block:: yaml
 
-   packages:
-     gcc:
-       externals:
-       - spec: gcc@10.5.0 languages='c,c++,fortran'
-         prefix: /opt/compilers
-         extra_attributes:
-           compilers:
-             c: /opt/compilers/bin/gcc-10
-             cxx: /opt/compilers/bin/g++-10
-             fortran: /opt/compilers/bin/gfortran-10
-         modules: [gcc/10.5.0]
+   compilers:
+   - compiler:
+       modules: [other/comp/gcc-5.3-sp3]
+       operating_system: SuSE11
+       paths:
+         cc: /usr/local/other/SLES11.3/gcc/5.3.0/bin/gcc
+         cxx: /usr/local/other/SLES11.3/gcc/5.3.0/bin/g++
+         f77: /usr/local/other/SLES11.3/gcc/5.3.0/bin/gfortran
+         fc: /usr/local/other/SLES11.3/gcc/5.3.0/bin/gfortran
+       spec: gcc@5.3.0
 
 Some compilers require special environment settings to be loaded not just
 to run, but also to execute the code they build, breaking packages that
@@ -516,7 +580,7 @@ Licensed Compilers
 ^^^^^^^^^^^^^^^^^^
 
 Some proprietary compilers require licensing to use.  If you need to
-use a licensed compiler, the process is similar to a mix of
+use a licensed compiler (eg, PGI), the process is similar to a mix of
 build your own, plus modules:
 
 #. Create a Spack package (if it doesn't exist already) to install
@@ -526,21 +590,24 @@ build your own, plus modules:
    using Spack to load the module it just created, and running simple
    builds (eg: ``cc helloWorld.c && ./a.out``)
 
-#. Add the newly-installed compiler to ``packages.yaml`` as shown above.
+#. Add the newly-installed compiler to ``compilers.yaml`` as shown
+   above.
 
 .. _mixed-toolchains:
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^
-Fortran compilers on macOS
-^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^
+Mixed Toolchains
+^^^^^^^^^^^^^^^^
 
 Modern compilers typically come with related compilers for C, C++ and
 Fortran bundled together.  When possible, results are best if the same
 compiler is used for all languages.
 
-In some cases, this is not possible.  For example, XCode on macOS provides no Fortran compilers.
-The user is therefore forced to use a mixed toolchain: XCode-provided Clang for C/C++ and e.g.
-GNU ``gfortran`` for Fortran.
+In some cases, this is not possible.  For example, starting with macOS El
+Capitan (10.11), many packages no longer build with GCC, but XCode
+provides no Fortran compilers.  The user is therefore forced to use a
+mixed toolchain: XCode-provided Clang for C/C++ and GNU ``gfortran`` for
+Fortran.
 
 #. You need to make sure that Xcode is installed. Run the following command:
 
@@ -593,25 +660,45 @@ GNU ``gfortran`` for Fortran.
 
    Note: the flag is ``-license``, not ``--license``.
 
+#. Run ``spack compiler find`` to locate Clang.
+
 #. There are different ways to get ``gfortran`` on macOS. For example, you can
    install GCC with Spack (``spack install gcc``), with Homebrew (``brew install
    gcc``), or from a `DMG installer
    <https://github.com/fxcoudert/gfortran-for-macOS/releases>`_.
 
-#. Run ``spack compiler find`` to locate both Apple-Clang and GCC.
+#. The only thing left to do is to edit ``~/.spack/darwin/compilers.yaml`` to provide
+   the path to ``gfortran``:
 
-Since languages in Spack are modeled as virtual packages, ``apple-clang`` will be used to provide
-C and C++, while GCC will be used for Fortran.
+   .. code-block:: yaml
+
+      compilers:
+      - compiler:
+        # ...
+        paths:
+          cc: /usr/bin/clang
+          cxx: /usr/bin/clang++
+          f77: /path/to/bin/gfortran
+          fc: /path/to/bin/gfortran
+        spec: apple-clang@11.0.0
+
+
+   If you used Spack to install GCC, you can get the installation prefix by
+   ``spack location -i gcc`` (this will only work if you have a single version
+   of GCC installed). Whereas for Homebrew, GCC is installed in
+   ``/usr/local/Cellar/gcc/x.y.z``. With the DMG installer, the correct path
+   will be ``/usr/local/gfortran``.
 
 ^^^^^^^^^^^^^^^^^^^^^
 Compiler Verification
 ^^^^^^^^^^^^^^^^^^^^^
 
-You can verify that your compilers are configured properly by installing a simple package. For example:
+You can verify that your compilers are configured properly by installing a
+simple package.  For example:
 
 .. code-block:: console
 
-   $ spack install zlib-ng%gcc@5.3.0
+   $ spack install zlib%gcc@5.3.0
 
 
 .. _vendor-specific-compiler-configuration:
@@ -620,7 +707,9 @@ You can verify that your compilers are configured properly by installing a simpl
 Vendor-Specific Compiler Configuration
 --------------------------------------
 
-This section provides details on how to get vendor-specific compilers working.
+With Spack, things usually "just work" with GCC.  Not so for other
+compilers.  This section provides details on how to get specific
+compilers working.
 
 ^^^^^^^^^^^^^^^
 Intel Compilers
@@ -642,8 +731,8 @@ compilers:
       you have installed from the ``PATH`` environment variable.
 
       If you want use a version of ``gcc`` or ``g++`` other than the default
-      version on your system, you need to use either the ``--gcc-install-dir``
-      or ``--gcc-toolchain`` compiler option to specify the path to the version of
+      version on your system, you need to use either the ``-gcc-name``
+      or ``-gxx-name`` compiler option to specify the path to the version of
       ``gcc`` or ``g++`` that you want to use."
 
       -- `Intel Reference Guide <https://software.intel.com/en-us/node/522750>`_
@@ -651,12 +740,76 @@ compilers:
 Intel compilers may therefore be configured in one of two ways with
 Spack: using modules, or using compiler flags.
 
+""""""""""""""""""""""""""
+Configuration with Modules
+""""""""""""""""""""""""""
+
+One can control which GCC is seen by the Intel compiler with modules.
+A module must be loaded both for the Intel Compiler (so it will run)
+and GCC (so the compiler can find the intended GCC).  The following
+configuration in ``compilers.yaml`` illustrates this technique:
+
+.. code-block:: yaml
+
+   compilers:
+   - compiler:
+       modules: [gcc-4.9.3, intel-15.0.24]
+       operating_system: centos7
+       paths:
+         cc: /opt/intel-15.0.24/bin/icc-15.0.24-beta
+         cxx: /opt/intel-15.0.24/bin/icpc-15.0.24-beta
+         f77: /opt/intel-15.0.24/bin/ifort-15.0.24-beta
+         fc: /opt/intel-15.0.24/bin/ifort-15.0.24-beta
+       spec: intel@15.0.24.4.9.3
+
+
+.. note::
+
+   The version number on the Intel compiler is a combination of
+   the "native" Intel version number and the GNU compiler it is
+   targeting.
+
+""""""""""""""""""""""""""
+Command Line Configuration
+""""""""""""""""""""""""""
+
+One can also control which GCC is seen by the Intel compiler by adding
+flags to the ``icc`` command:
+
+#. Identify the location of the compiler you just installed:
+
+   .. code-block:: console
+
+       $ spack location --install-dir gcc
+       ~/spack/opt/spack/linux-centos7-x86_64/gcc-4.9.3-iy4rw...
+
+#. Set up ``compilers.yaml``, for example:
+
+   .. code-block:: yaml
+
+       compilers:
+       - compiler:
+           modules: [intel-15.0.24]
+           operating_system: centos7
+           paths:
+             cc: /opt/intel-15.0.24/bin/icc-15.0.24-beta
+             cxx: /opt/intel-15.0.24/bin/icpc-15.0.24-beta
+             f77: /opt/intel-15.0.24/bin/ifort-15.0.24-beta
+             fc: /opt/intel-15.0.24/bin/ifort-15.0.24-beta
+           flags:
+             cflags: -gcc-name ~/spack/opt/spack/linux-centos7-x86_64/gcc-4.9.3-iy4rw.../bin/gcc
+             cxxflags: -gxx-name ~/spack/opt/spack/linux-centos7-x86_64/gcc-4.9.3-iy4rw.../bin/g++
+             fflags: -gcc-name ~/spack/opt/spack/linux-centos7-x86_64/gcc-4.9.3-iy4rw.../bin/gcc
+           spec: intel@15.0.24.4.9.3
+
+
 ^^^
 NAG
 ^^^
 
-The Numerical Algorithms Group provides a licensed Fortran compiler.
-It is recommended to use GCC for your C/C++ compilers.
+The Numerical Algorithms Group provides a licensed Fortran compiler. Like Clang,
+this requires you to set up a :ref:`mixed-toolchains`. It is recommended to use
+GCC for your C/C++ compilers.
 
 The NAG Fortran compilers are a bit more strict than other compilers, and many
 packages will fail to install with error messages like:
@@ -673,40 +826,44 @@ the command line:
 
    $ spack install openmpi fflags="-mismatch"
 
-Or it can be set permanently in your ``packages.yaml``:
+Or it can be set permanently in your ``compilers.yaml``:
 
 .. code-block:: yaml
 
-   packages:
-     nag:
-       externals:
-       - spec: nag@6.1
-         prefix: /opt/nag/bin
-         extra_attributes:
-           compilers:
-             fortran: /opt/nag/bin/nagfor
-         flags:
-           fflags: -mismatch
+   - compiler:
+    modules: []
+    operating_system: centos6
+    paths:
+      cc: /soft/spack/opt/spack/linux-x86_64/gcc-5.3.0/gcc-6.1.0-q2zosj3igepi3pjnqt74bwazmptr5gpj/bin/gcc
+      cxx: /soft/spack/opt/spack/linux-x86_64/gcc-5.3.0/gcc-6.1.0-q2zosj3igepi3pjnqt74bwazmptr5gpj/bin/g++
+      f77: /soft/spack/opt/spack/linux-x86_64/gcc-4.4.7/nag-6.1-jt3h5hwt5myezgqguhfsan52zcskqene/bin/nagfor
+      fc: /soft/spack/opt/spack/linux-x86_64/gcc-4.4.7/nag-6.1-jt3h5hwt5myezgqguhfsan52zcskqene/bin/nagfor
+    flags:
+      fflags: -mismatch
+    spec: nag@6.1
+
 
 ---------------
 System Packages
 ---------------
 
-Once compilers are configured, one needs to determine which pre-installed system packages,
-if any, to use in builds.  These are also configured in the ``~/.spack/packages.yaml`` file.
-For example, to use an OpenMPI installed in /opt/local, one would use:
+Once compilers are configured, one needs to determine which
+pre-installed system packages, if any, to use in builds.  This is
+configured in the file ``~/.spack/packages.yaml``.  For example, to use
+an OpenMPI installed in /opt/local, one would use:
 
 .. code-block:: yaml
 
-   packages:
-     openmpi:
-       buildable: False
-       externals:
-       - spec: openmpi@1.10.1
-         prefix: /opt/local
+    packages:
+        openmpi:
+            externals:
+            - spec: openmpi@1.10.1
+              prefix: /opt/local
+            buildable: False
 
-In general, *Spack is easier to use and more reliable if it builds all of its own dependencies*.
-However, there are several packages for which one commonly needs to use system versions:
+In general, Spack is easier to use and more reliable if it builds all of
+its own dependencies.  However, there are several packages for which one
+commonly needs to use system versions:
 
 ^^^
 MPI
@@ -719,7 +876,8 @@ you are unlikely to get a working MPI from Spack.  Instead, use an
 appropriate pre-installed MPI.
 
 If you choose a pre-installed MPI, you should consider using the
-pre-installed compiler used to build that MPI.
+pre-installed compiler used to build that MPI; see above on
+``compilers.yaml``.
 
 ^^^^^^^
 OpenSSL
@@ -1283,9 +1441,9 @@ To configure Spack, first run the following command inside the Spack console:
    spack compiler find
 
 This creates a ``.staging`` directory in our Spack prefix, along with a ``windows`` subdirectory
-containing a ``packages.yaml`` file. On a fresh Windows install with the above packages
+containing a ``compilers.yaml`` file. On a fresh Windows install with the above packages
 installed, this command should only detect Microsoft Visual Studio and the Intel Fortran
-compiler will be integrated within the first version of MSVC present in the ``packages.yaml``
+compiler will be integrated within the first version of MSVC present in the ``compilers.yaml``
 output.
 
 Spack provides a default ``config.yaml`` file for Windows that it will use unless overridden.

lib/spack/docs/gpu_configuration.rst

@@ -23,6 +23,7 @@ components for use by dependent packages:
 
    packages:
      all:
+       compiler: [rocmcc@=5.3.0]
        variants: amdgpu_target=gfx90a
      hip:
        buildable: false
@@ -69,15 +70,16 @@ This is in combination with the following compiler definition:
 
 .. code-block:: yaml
 
-   packages:
-     llvm-amdgpu:
-       externals:
-       - spec: llvm-amdgpu@=5.3.0
-         prefix: /opt/rocm-5.3.0
-         compilers:
-           c: /opt/rocm-5.3.0/bin/amdclang
-           cxx: /opt/rocm-5.3.0/bin/amdclang++
-           fortran: null
+   compilers:
+   - compiler:
+       spec: rocmcc@=5.3.0
+       paths:
+         cc: /opt/rocm-5.3.0/bin/amdclang
+         cxx: /opt/rocm-5.3.0/bin/amdclang++
+         f77: null
+         fc: /opt/rocm-5.3.0/bin/amdflang
+       operating_system: rhel8
+       target: x86_64
 
 This includes the following considerations:
 

lib/spack/docs/include_yaml.rst

@@ -1,65 +0,0 @@
-.. Copyright Spack Project Developers. See COPYRIGHT file for details.
-
-   SPDX-License-Identifier: (Apache-2.0 OR MIT)
-
-.. _include-yaml:
-
-===============================
-Include Settings (include.yaml)
-===============================
-
-Spack allows you to include configuration files through ``include.yaml``.
-Using the ``include:`` heading results in pulling in external configuration
-information to be used by any Spack command.
-
-Included configuration files are required *unless* they are explicitly optional
-or the entry's condition evaluates to ``false``. Optional includes are specified
-with the ``optional`` clause and conditional with the ``when`` clause. For
-example,
-
-.. code-block:: yaml
-
-   include:
-   - /path/to/a/required/config.yaml
-   - path: /path/to/$os/$target/config
-     optional: true
-   - path: /path/to/os-specific/config-dir
-     when: os == "ventura"
-
-shows all three. The first entry, ``/path/to/a/required/config.yaml``,
-indicates that included ``config.yaml`` file is required (so must exist).
-Use of ``optional: true`` for ``/path/to/$os/$target/config`` means
-the path is only included if it exists. The condition ``os == "ventura"``
-in the ``when`` clause for ``/path/to/os-specific/config-dir`` means the
-path is only included when the operating system (``os``) is ``ventura``.
-
-The same conditions and variables in `Spec List References 
-<https://spack.readthedocs.io/en/latest/environments.html#spec-list-references>`_
-can be used for conditional activation in the ``when`` clauses.
-
-Included files can be specified by path or by their parent directory.
-Paths may be absolute, relative (to the configuration file including the path), 
-or specified as URLs. Only the ``file``, ``ftp``, ``http`` and ``https`` protocols (or
-schemes) are supported. Spack-specific, environment and user path variables
-can be used. (See :ref:`config-file-variables` for more information.)
-
-A ``sha256`` is required for remote file URLs and must be specified as follows:
-
-.. code-block:: yaml
-
-   include:
-   - path: https://github.com/path/to/raw/config/compilers.yaml
-     sha256: 26e871804a92cd07bb3d611b31b4156ae93d35b6a6d6e0ef3a67871fcb1d258b
-
-Additionally, remote file URLs must link to the **raw** form of the file's
-contents (e.g., `GitHub
-<https://docs.github.com/en/repositories/working-with-files/using-files/viewing-and-understanding-files#viewing-or-copying-the-raw-file-content>`_
-or `GitLab
-<https://docs.gitlab.com/ee/api/repository_files.html#get-raw-file-from-repository>`_).
-
-.. warning::
-
-   Recursive includes are not currently processed in a breadth-first manner
-   so the value of a configuration option that is altered by multiple included
-   files may not be what you expect. This will be addressed in a future
-   update.

lib/spack/docs/index.rst

@@ -71,11 +71,9 @@ or refer to the full manual below.
 
    configuration
    config_yaml
-   include_yaml
    packages_yaml
    build_settings
    environments
-   env_vars_yaml
    containers
    mirrors
    module_file_support

lib/spack/docs/module_file_support.rst

@@ -128,7 +128,7 @@ depend on the spec:
 
 .. code-block:: python
 
-   def setup_run_environment(self, env: EnvironmentModifications) -> None:
+   def setup_run_environment(self, env):
        if self.spec.satisfies("+foo"):
            env.set("FOO", "bar")
 
@@ -142,7 +142,7 @@ For example, a simplified version of the ``python`` package could look like this
 
 .. code-block:: python
 
-   def setup_dependent_run_environment(self, env: EnvironmentModifications, dependent_spec: Spec) -> None:
+   def setup_dependent_run_environment(self, env, dependent_spec):
        if dependent_spec.package.extends(self.spec):
            env.prepend_path("PYTHONPATH", dependent_spec.prefix.lib.python)
 

lib/spack/docs/packages_yaml.rst

@@ -486,8 +486,6 @@ present. For instance with a configuration like:
 
 you will use ``mvapich2~cuda %gcc`` as an ``mpi`` provider.
 
-.. _package-strong-preferences:
-
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Conflicts and strong preferences
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -557,13 +555,14 @@ preferences.
    FAQ: :ref:`Why does Spack pick particular versions and variants? <faq-concretizer-precedence>`
 
 
-The ``target`` and ``providers`` preferences
+Most package preferences (``compilers``, ``target`` and ``providers``)
 can only be set globally under the ``all`` section of ``packages.yaml``:
 
 .. code-block:: yaml
 
    packages:
      all:
+       compiler: [gcc@12.2.0, clang@12:, oneapi@2023:]
        target: [x86_64_v3]
        providers:
          mpi: [mvapich2, mpich, openmpi]

lib/spack/docs/packaging_guide.rst

@@ -369,9 +369,9 @@ If you have a collection of software expected to work well together with
 no source code of its own, you can create a :ref:`BundlePackage <bundlepackage>`.
 Examples where bundle packages can be useful include defining suites of
 applications (e.g, `EcpProxyApps
-<https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/ecp_proxy_apps/package.py>`_), commonly used libraries
-(e.g., `AmdAocl <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/amd_aocl/package.py>`_),
-and software development kits (e.g., `EcpDataVisSdk <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/ecp_data_vis_sdk/package.py>`_).
+<https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/ecp-proxy-apps/package.py>`_), commonly used libraries
+(e.g., `AmdAocl <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/amd-aocl/package.py>`_),
+and software development kits (e.g., `EcpDataVisSdk <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/ecp-data-vis-sdk/package.py>`_).
 
 These versioned packages primarily consist of dependencies on the associated
 software packages. They can include :ref:`variants <variants>` to ensure
@@ -443,7 +443,7 @@ lives in:
 .. code-block:: console
 
    $ spack location -p gmp
-   ${SPACK_ROOT}/var/spack/repos/spack_repo/builtin/packages/gmp/package.py
+   ${SPACK_ROOT}/var/spack/repos/builtin/packages/gmp/package.py
 
 but ``spack edit`` provides a much simpler shortcut and saves you the
 trouble of typing the full path.
@@ -457,19 +457,19 @@ live in Spack's directory structure.  In general, :ref:`cmd-spack-create`
 handles creating package files for you, so you can skip most of the
 details here.
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-``var/spack/repos/spack_repo/builtin/packages``
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+``var/spack/repos/builtin/packages``
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 A Spack installation directory is structured like a standard UNIX
 install prefix (``bin``, ``lib``, ``include``, ``var``, ``opt``,
 etc.).  Most of the code for Spack lives in ``$SPACK_ROOT/lib/spack``.
-Packages themselves live in ``$SPACK_ROOT/var/spack/repos/spack_repo/builtin/packages``.
+Packages themselves live in ``$SPACK_ROOT/var/spack/repos/builtin/packages``.
 
 If you ``cd`` to that directory, you will see directories for each
 package:
 
-.. command-output:: cd $SPACK_ROOT/var/spack/repos/spack_repo/builtin/packages && ls
+.. command-output:: cd $SPACK_ROOT/var/spack/repos/builtin/packages && ls
    :shell:
    :ellipsis: 10
 
@@ -479,7 +479,7 @@ package lives in:
 
 .. code-block:: none
 
-   $SPACK_ROOT/var/spack/repos/spack_repo/builtin/packages/libelf/package.py
+   $SPACK_ROOT/var/spack/repos/builtin/packages/libelf/package.py
 
 Alongside the ``package.py`` file, a package may contain extra
 directories or files (like patches) that it needs to build.
@@ -492,7 +492,7 @@ Packages are named after the directory containing ``package.py``. So,
 ``libelf``'s ``package.py`` lives in a directory called ``libelf``.
 The ``package.py`` file defines a class called ``Libelf``, which
 extends Spack's ``Package`` class.  For example, here is
-``$SPACK_ROOT/var/spack/repos/spack_repo/builtin/packages/libelf/package.py``:
+``$SPACK_ROOT/var/spack/repos/builtin/packages/libelf/package.py``:
 
 .. code-block:: python
    :linenos:
@@ -520,7 +520,7 @@ these:
    $ spack install libelf@0.8.13
 
 Spack sees the package name in the spec and looks for
-``libelf/package.py`` in ``var/spack/repos/spack_repo/builtin/packages``.
+``libelf/package.py`` in ``var/spack/repos/builtin/packages``.
 Likewise, if you run ``spack install py-numpy``, Spack looks for
 ``py-numpy/package.py``.
 
@@ -686,7 +686,7 @@ https://www.open-mpi.org/software/ompi/v2.1/downloads/openmpi-2.1.1.tar.bz2
 In order to handle this, you can define a ``url_for_version()`` function
 like so:
 
-.. literalinclude:: _spack_root/var/spack/repos/spack_repo/builtin/packages/openmpi/package.py
+.. literalinclude:: _spack_root/var/spack/repos/builtin/packages/openmpi/package.py
    :pyobject: Openmpi.url_for_version
 
 With the use of this ``url_for_version()``, Spack knows to download OpenMPI ``2.1.1``
@@ -787,7 +787,7 @@ of GNU. For that, Spack goes a step further and defines a mixin class that
 takes care of all of the plumbing and requires packagers to just define a proper
 ``gnu_mirror_path`` attribute:
 
-.. literalinclude:: _spack_root/var/spack/repos/spack_repo/builtin/packages/autoconf/package.py
+.. literalinclude:: _spack_root/var/spack/repos/builtin/packages/autoconf/package.py
    :lines: 9-18
 
 ^^^^^^^^^^^^^^^^^^^^^^^^
@@ -1995,7 +1995,7 @@ structure like this:
 
 .. code-block:: none
 
-   $SPACK_ROOT/var/spack/repos/spack_repo/builtin/packages/
+   $SPACK_ROOT/var/spack/repos/builtin/packages/
        mvapich2/
            package.py
            ad_lustre_rwcontig_open_source.patch
@@ -2133,7 +2133,7 @@ handles ``RPATH``:
 
 .. _pyside-patch:
 
-.. literalinclude:: _spack_root/var/spack/repos/spack_repo/builtin/packages/py_pyside/package.py
+.. literalinclude:: _spack_root/var/spack/repos/builtin/packages/py-pyside/package.py
    :pyobject: PyPyside.patch
    :linenos:
 
@@ -2201,7 +2201,7 @@ using the ``spack resource show`` command::
 
   $ spack resource show 3877ab54
   3877ab548f88597ab2327a2230ee048d2d07ace1062efe81fc92e91b7f39cd00
-      path:       /home/spackuser/src/spack/var/spack/repos/spack_repo/builtin/packages/m4/gnulib-pgi.patch
+      path:       /home/spackuser/src/spack/var/spack/repos/builtin/packages/m4/gnulib-pgi.patch
       applies to: builtin.m4
 
 ``spack resource show`` looks up downloadable resources from package
@@ -2219,7 +2219,7 @@ wonder where the extra boost patches are coming from::
           ^boost@1.68.0%apple-clang@9.0.0+atomic+chrono~clanglibcpp cxxstd=default +date_time~debug+exception+filesystem+graph~icu+iostreams+locale+log+math~mpi+multithreaded~numpy patches=2ab6c72d03dec6a4ae20220a9dfd5c8c572c5294252155b85c6874d97c323199,b37164268f34f7133cbc9a4066ae98fda08adf51e1172223f6a969909216870f ~pic+program_options~python+random+regex+serialization+shared+signals~singlethreaded+system~taggedlayout+test+thread+timer~versionedlayout+wave arch=darwin-highsierra-x86_64
   $ spack resource show b37164268
   b37164268f34f7133cbc9a4066ae98fda08adf51e1172223f6a969909216870f
-      path:       /home/spackuser/src/spack/var/spack/repos/spack_repo/builtin/packages/dealii/boost_1.68.0.patch
+      path:       /home/spackuser/src/spack/var/spack/repos/builtin/packages/dealii/boost_1.68.0.patch
       applies to: builtin.boost
       patched by: builtin.dealii
 
@@ -2930,7 +2930,7 @@ this, Spack provides four different methods that can be overridden in a package:
 
 The Qt package, for instance, uses this call:
 
-.. literalinclude:: _spack_root/var/spack/repos/spack_repo/builtin/packages/qt/package.py
+.. literalinclude:: _spack_root/var/spack/repos/builtin/packages/qt/package.py
    :pyobject: Qt.setup_dependent_build_environment
    :linenos:
 
@@ -2958,7 +2958,7 @@ variables to be used by the dependent. This is done by implementing
 :meth:`setup_dependent_package <spack.package_base.PackageBase.setup_dependent_package>`. An
 example of this can be found in the ``Python`` package:
 
-.. literalinclude:: _spack_root/var/spack/repos/spack_repo/builtin/packages/python/package.py
+.. literalinclude:: _spack_root/var/spack/repos/builtin/packages/python/package.py
    :pyobject: Python.setup_dependent_package
    :linenos:
 
@@ -3785,7 +3785,7 @@ It is usually sufficient for a packager to override a few
 build system specific helper methods or attributes to provide, for instance,
 configure arguments:
 
-.. literalinclude::  _spack_root/var/spack/repos/spack_repo/builtin/packages/m4/package.py
+.. literalinclude::  _spack_root/var/spack/repos/builtin/packages/m4/package.py
     :pyobject: M4.configure_args
     :linenos:
 
@@ -4110,7 +4110,7 @@ Shell command functions
 
 Recall the install method from ``libelf``:
 
-.. literalinclude::  _spack_root/var/spack/repos/spack_repo/builtin/packages/libelf/package.py
+.. literalinclude::  _spack_root/var/spack/repos/builtin/packages/libelf/package.py
    :pyobject: Libelf.install
    :linenos:
 
@@ -4901,7 +4901,7 @@ the one passed to install, only the MPI implementations all set some
 additional properties on it to help you out.  E.g., in openmpi, you'll
 find this:
 
-.. literalinclude:: _spack_root/var/spack/repos/spack_repo/builtin/packages/openmpi/package.py
+.. literalinclude:: _spack_root/var/spack/repos/builtin/packages/openmpi/package.py
    :pyobject: Openmpi.setup_dependent_package
 
 That code allows the ``openmpi`` package to associate an ``mpicc`` property
@@ -6001,16 +6001,16 @@ with those implemented in the package itself.
    * - Parent/Provider Package
      - Stand-alone Tests
    * - `C
-       <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/c>`_
+       <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/c>`_
      - Compiles ``hello.c`` and runs it
    * - `Cxx
-       <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/cxx>`_
+       <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/cxx>`_
      - Compiles and runs several ``hello`` programs
    * - `Fortran
-       <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/fortran>`_
+       <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/fortran>`_
      - Compiles and runs ``hello`` programs (``F`` and ``f90``)
    * - `Mpi
-       <https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/mpi>`_
+       <https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/mpi>`_
      - Compiles and runs ``mpi_hello`` (``c``, ``fortran``)
    * - :ref:`PythonPackage <pythonpackage>`
      - Imports modules listed in the ``self.import_modules`` property with defaults derived from the tarball
@@ -6031,7 +6031,7 @@ maintainers provide additional stand-alone tests customized to the package.
 One example of a package that adds its own stand-alone tests to those
 "inherited" by the virtual package it provides an implementation for is
 the `Openmpi package
-<https://github.com/spack/spack/blob/develop/var/spack/repos/spack_repo/builtin/packages/openmpi/package.py>`_.
+<https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/openmpi/package.py>`_.
 
 Below are snippets from running and viewing the stand-alone test results
 for ``openmpi``:

lib/spack/docs/repositories.rst

@@ -9,7 +9,7 @@ Package Repositories (repos.yaml)
 =================================
 
 Spack comes with thousands of built-in package recipes in
-``var/spack/repos/spack_repo/builtin/``.  This is a **package repository** -- a
+``var/spack/repos/builtin/``.  This is a **package repository** -- a
 directory that Spack searches when it needs to find a package by name.
 You may need to maintain packages for restricted, proprietary or
 experimental software separately from the built-in repository. Spack
@@ -69,7 +69,7 @@ The default ``etc/spack/defaults/repos.yaml`` file looks like this:
 .. code-block:: yaml
 
   repos:
-  - $spack/var/spack/repos/spack_repo/builtin
+  - $spack/var/spack/repos/builtin
 
 The file starts with ``repos:`` and contains a single ordered list of
 paths to repositories. Each path is on a separate line starting with
@@ -78,16 +78,16 @@ paths to repositories. Each path is on a separate line starting with
 .. code-block:: yaml
 
   repos:
-  - /opt/repos/spack_repo/local_repo
-  - $spack/var/spack/repos/spack_repo/builtin
+  - /opt/local-repo
+  - $spack/var/spack/repos/builtin
 
 When Spack interprets a spec, e.g., ``mpich`` in ``spack install mpich``,
 it searches these repositories in order (first to last) to resolve each
 package name.  In this example, Spack will look for the following
 packages and use the first valid file:
 
-1. ``/opt/repos/spack_repo/local_repo/packages/mpich/package.py``
-2. ``$spack/var/spack/repos/spack_repo/builtin/packages/mpich/package.py``
+1. ``/opt/local-repo/packages/mpich/package.py``
+2. ``$spack/var/spack/repos/builtin/packages/mpich/package.py``
 
 .. note::
 
@@ -101,15 +101,14 @@ Namespaces
 
 Every repository in Spack has an associated **namespace** defined in its
 top-level ``repo.yaml`` file.  If you look at
-``var/spack/repos/spack_repo/builtin/repo.yaml`` in the built-in repository, you'll
+``var/spack/repos/builtin/repo.yaml`` in the built-in repository, you'll
 see that its namespace is ``builtin``:
 
 .. code-block:: console
 
-  $ cat var/spack/repos/spack_repo/builtin/repo.yaml
+  $ cat var/spack/repos/builtin/repo.yaml
   repo:
     namespace: builtin
-    api: v2.0
 
 Spack records the repository namespace of each installed package.  For
 example, if you install the ``mpich`` package from the ``builtin`` repo,
@@ -218,15 +217,15 @@ Suppose you have three repositories: the builtin Spack repo
 repo containing your own prototype packages (``proto``).  Suppose they
 contain packages as follows:
 
-  +--------------+-----------------------------------------------+-----------------------------+
-  | Namespace    | Path to repo                                  | Packages                    |
-  +==============+===============================================+=============================+
-  | ``proto``    | ``~/my_spack_repos/spack_repo/proto``         | ``mpich``                   |
-  +--------------+-----------------------------------------------+-----------------------------+
-  | ``llnl``     | ``/usr/local/repos/spack_repo/llnl``          | ``hdf5``                    |
-  +--------------+-----------------------------------------------+-----------------------------+
-  | ``builtin``  | ``$spack/var/spack/repos/spack_repo/builtin`` | ``mpich``, ``hdf5``, others |
-  +--------------+-----------------------------------------------+-----------------------------+
+  +--------------+------------------------------------+-----------------------------+
+  | Namespace    | Path to repo                       | Packages                    |
+  +==============+====================================+=============================+
+  | ``proto``    | ``~/proto``                        | ``mpich``                   |
+  +--------------+------------------------------------+-----------------------------+
+  | ``llnl``     | ``/usr/local/llnl``                | ``hdf5``                    |
+  +--------------+------------------------------------+-----------------------------+
+  | ``builtin``  | ``$spack/var/spack/repos/builtin`` | ``mpich``, ``hdf5``, others |
+  +--------------+------------------------------------+-----------------------------+
 
 Suppose that ``hdf5`` depends on ``mpich``.  You can override the
 built-in ``hdf5`` by adding the ``llnl`` repo to ``repos.yaml``:
@@ -234,8 +233,8 @@ built-in ``hdf5`` by adding the ``llnl`` repo to ``repos.yaml``:
 .. code-block:: yaml
 
    repos:
-   - /usr/local/repos/spack_repo/llnl
-   - $spack/var/spack/repos/spack_repo/builtin
+   - /usr/local/llnl
+   - $spack/var/spack/repos/builtin
 
 ``spack install hdf5`` will install ``llnl.hdf5 ^builtin.mpich``.
 
@@ -244,9 +243,9 @@ If, instead, ``repos.yaml`` looks like this:
 .. code-block:: yaml
 
    repos:
-   - ~/my_spack_repos/spack_repo/proto
-   - /usr/local/repos/spack_repo/llnl
-   - $spack/var/spack/repos/spack_repo/builtin
+   - ~/proto
+   - /usr/local/llnl
+   - $spack/var/spack/repos/builtin
 
 ``spack install hdf5`` will install ``llnl.hdf5 ^proto.mpich``.
 
@@ -327,8 +326,8 @@ files, use ``spack repo list``.
 
   $ spack repo list
   ==> 2 package repositories.
-  myrepo     v2.0    ~/my_spack_repos/spack_repo/myrepo
-  builtin    v2.0    ~/spack/var/spack/repos/spack_repo/builtin
+  myrepo     ~/myrepo
+  builtin    ~/spack/var/spack/repos/builtin
 
 Each repository is listed with its associated namespace.  To get the raw,
 merged YAML from all configuration files, use ``spack config get repos``:
@@ -336,9 +335,9 @@ merged YAML from all configuration files, use ``spack config get repos``:
 .. code-block:: console
 
    $ spack config get repos
-   repos:
-   - ~/my_spack_repos/spack_repo/myrepo
-   - $spack/var/spack/repos/spack_repo/builtin
+   repos:srepos:
+   - ~/myrepo
+   - $spack/var/spack/repos/builtin
 
 Note that, unlike ``spack repo list``, this does not include the
 namespace, which is read from each repo's ``repo.yaml``.
@@ -352,54 +351,66 @@ yourself; you can use the ``spack repo create`` command.
 
 .. code-block:: console
 
-  $ spack repo create ~/my_spack_repos myrepo
+  $ spack repo create myrepo
   ==> Created repo with namespace 'myrepo'.
   ==> To register it with spack, run this command:
-    spack repo add ~/my_spack_repos/spack_repo/myrepo
+    spack repo add ~/myrepo
 
-  $ ls ~/my_spack_repos/spack_repo/myrepo
+  $ ls myrepo
   packages/  repo.yaml
 
-  $ cat ~/my_spack_repos/spack_repo/myrepo/repo.yaml
+  $ cat myrepo/repo.yaml
   repo:
     namespace: 'myrepo'
-    api: v2.0
 
-Namespaces can also be nested, which can be useful if you have
-multiple package repositories for an organization. Spack will
-create the corresponding directory structure for you:
+By default, the namespace of a new repo matches its directory's name.
+You can supply a custom namespace with a second argument, e.g.:
 
 .. code-block:: console
 
-  $ spack repo create ~/my_spack_repos llnl.comp
+  $ spack repo create myrepo llnl.comp
   ==> Created repo with namespace 'llnl.comp'.
   ==> To register it with spack, run this command:
-    spack repo add ~/my_spack_repos/spack_repo/llnl/comp
+    spack repo add ~/myrepo
 
-
-  $ cat ~/my_spack_repos/spack_repo/llnl/comp/repo.yaml
+  $ cat myrepo/repo.yaml
   repo:
     namespace: 'llnl.comp'
-    api: v2.0
+
+You can also create repositories with custom structure with the ``-d/--subdirectory``
+argument, e.g.:
+
+.. code-block:: console
+
+  $ spack repo create -d applications myrepo apps
+  ==> Created repo with namespace 'apps'.
+  ==> To register it with Spack, run this command:
+    spack repo add ~/myrepo
+
+  $ ls myrepo
+  applications/  repo.yaml
+
+  $ cat myrepo/repo.yaml
+  repo:
+    namespace: apps
+    subdirectory: applications
 
 ^^^^^^^^^^^^^^^^^^
 ``spack repo add``
 ^^^^^^^^^^^^^^^^^^
 
 Once your repository is created, you can register it with Spack with
-``spack repo add``. You nee to specify the path to the directory that
-contains the ``repo.yaml`` file.
+``spack repo add``:
 
 .. code-block:: console
 
-   $ spack repo add ~/my_spack_repos/spack_repo/llnl/comp
+   $ spack repo add ./myrepo
    ==> Added repo with namespace 'llnl.comp'.
 
    $ spack repo list
    ==> 2 package repositories.
-  llnl.comp    v2.0    ~/my_spack_repos/spack_repo/llnl/comp
-  builtin      v2.0    ~/spack/var/spack/repos/spack_repo/builtin
-
+   llnl.comp    ~/myrepo
+   builtin      ~/spack/var/spack/repos/builtin
 
 This simply adds the repo to your ``repos.yaml`` file.
 
@@ -421,43 +432,46 @@ By namespace:
 .. code-block:: console
 
   $ spack repo rm llnl.comp
-  ==> Removed repository ~/my_spack_repos/spack_repo/llnl/comp with namespace 'llnl.comp'.
+  ==> Removed repository ~/myrepo with namespace 'llnl.comp'.
 
   $ spack repo list
   ==> 1 package repository.
-  builtin    ~/spack/var/spack/repos/spack_repo/builtin
+  builtin    ~/spack/var/spack/repos/builtin
 
 By path:
 
 .. code-block:: console
 
-  $ spack repo rm ~/my_spack_repos/spack_repo/llnl/comp
-  ==> Removed repository ~/my_spack_repos/spack_repo/llnl/comp
+  $ spack repo rm ~/myrepo
+  ==> Removed repository ~/myrepo
 
   $ spack repo list
   ==> 1 package repository.
-  builtin    ~/spack/var/spack/repos/spack_repo/builtin
+  builtin    ~/spack/var/spack/repos/builtin
 
 --------------------------------
 Repo namespaces and Python
 --------------------------------
 
-Package repositories are implemented as Python packages. To be precise,
-they are `namespace packages
-<https://packaging.python.org/en/latest/guides/packaging-namespace-packages/>`_
-with ``spack_repo`` the top-level namespace, followed by the repository
-namespace as submodules. For example, the builtin repository corresponds
-to the Python module ``spack_repo.builtin.packages``.
+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.
 
-This structure allows you to extend a ``builtin`` package in your own
+You could, for example, extend a ``builtin`` package in your own
 repository:
 
 .. code-block:: python
 
-   from spack_repo.builtin.packages.mpich.package import Mpich
+   from spack.pkg.builtin.mpich import Mpich
 
    class MyPackage(Mpich):
        ...
 
-Spack populates ``sys.path`` at runtime with the path to the root of your
-package repository's ``spack_repo`` directory.
+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>`_.
+

lib/spack/docs/requirements.txt

@@ -1,13 +1,13 @@
-sphinx==8.2.3
+sphinx==8.2.1
 sphinxcontrib-programoutput==0.18
 sphinx_design==0.6.1
 sphinx-rtd-theme==3.0.2
-python-levenshtein==0.27.1
+python-levenshtein==0.26.1
 docutils==0.21.2
 pygments==2.19.1
-urllib3==2.4.0
-pytest==8.3.5
-isort==6.0.1
+urllib3==2.3.0
+pytest==8.3.4
+isort==6.0.0
 black==25.1.0
-flake8==7.2.0
+flake8==7.1.2
 mypy==1.11.1

lib/spack/external/__init__.py

@@ -11,7 +11,6 @@
 * Homepage: https://altgraph.readthedocs.io/en/latest/index.html
 * Usage: dependency of macholib
 * Version: 0.17.3
-* License: MIT
 
 archspec
 --------
@@ -19,7 +18,6 @@
 * Homepage: https://pypi.python.org/pypi/archspec
 * Usage: Labeling, comparison and detection of microarchitectures
 * Version: 0.2.5 (commit 38ce485258ffc4fc6dd6688f8dc90cb269478c47)
-* License: Apache-2.0 or MIT
 
 astunparse
 ----------------
@@ -27,7 +25,6 @@
 * Homepage: https://github.com/simonpercivall/astunparse
 * Usage: Unparsing Python ASTs for package hashes in Spack
 * Version: 1.6.3 (plus modifications)
-* License: PSF-2.0
 * Note: This is in ``spack.util.unparse`` because it's very heavily
   modified, and we want to track coverage for it.
   Specifically, we have modified this library to generate consistent unparsed ASTs
@@ -44,7 +41,6 @@
 * Homepage: https://github.com/python-attrs/attrs
 * Usage: Needed by jsonschema.
 * Version: 22.1.0
-* License: MIT
 
 ctest_log_parser
 ----------------
@@ -52,7 +48,6 @@
 * Homepage: https://github.com/Kitware/CMake/blob/master/Source/CTest/cmCTestBuildHandler.cxx
 * Usage: Functions to parse build logs and extract error messages.
 * Version: Unversioned
-* License: BSD-3-Clause
 * Note: This is a homemade port of Kitware's CTest build handler.
 
 distro
@@ -61,7 +56,6 @@
 * Homepage: https://pypi.python.org/pypi/distro
 * Usage: Provides a more stable linux distribution detection.
 * Version: 1.8.0
-* License: Apache-2.0
 
 jinja2
 ------
@@ -69,7 +63,6 @@
 * Homepage: https://pypi.python.org/pypi/Jinja2
 * Usage: A modern and designer-friendly templating language for Python.
 * Version: 3.0.3 (last version supporting Python 3.6)
-* License: BSD-3-Clause
 
 jsonschema
 ----------
@@ -77,7 +70,6 @@
 * Homepage: https://pypi.python.org/pypi/jsonschema
 * Usage: An implementation of JSON Schema for Python.
 * Version: 3.2.0 (last version before 2.7 and 3.6 support was dropped)
-* License: MIT
 * Note: We don't include tests or benchmarks; just what Spack needs.
 
 macholib
@@ -86,7 +78,6 @@
 * Homepage: https://macholib.readthedocs.io/en/latest/index.html#
 * Usage: Manipulation of Mach-o binaries for relocating macOS buildcaches on Linux
 * Version: 1.16.2
-* License: MIT
 
 markupsafe
 ----------
@@ -94,7 +85,6 @@
 * Homepage: https://pypi.python.org/pypi/MarkupSafe
 * Usage: Implements a XML/HTML/XHTML Markup safe string for Python.
 * Version: 2.0.1 (last version supporting Python 3.6)
-* License: BSD-3-Clause
 
 pyrsistent
 ----------
@@ -102,7 +92,6 @@
 * Homepage: http://github.com/tobgu/pyrsistent/
 * Usage: Needed by `jsonschema`
 * Version: 0.18.0
-* License: MIT
 
 ruamel.yaml
 ------
@@ -112,7 +101,6 @@
   actively maintained and has more features, including round-tripping
   comments read from config files.
 * Version: 0.17.21
-* License: MIT
 
 six
 ---
@@ -120,6 +108,5 @@
 * Homepage: https://pypi.python.org/pypi/six
 * Usage: Python 2 and 3 compatibility utilities.
 * Version: 1.16.0
-* License: MIT
 
 """

lib/spack/llnl/util/filesystem.py

@@ -764,7 +764,7 @@ def copy_tree(
 
     files = glob.glob(src)
     if not files:
-        raise OSError("No such file or directory: '{0}'".format(src), errno.ENOENT)
+        raise OSError("No such file or directory: '{0}'".format(src))
 
     # For Windows hard-links and junctions, the source path must exist to make a symlink. Add
     # all symlinks to this list while traversing the tree, then when finished, make all

lib/spack/llnl/util/lang.py

@@ -11,24 +11,10 @@
 import re
 import sys
 import traceback
-import types
 import typing
 import warnings
 from datetime import datetime, timedelta
-from typing import (
-    Any,
-    Callable,
-    Dict,
-    Generic,
-    Iterable,
-    Iterator,
-    List,
-    Mapping,
-    Optional,
-    Tuple,
-    TypeVar,
-    Union,
-)
+from typing import Callable, Dict, Iterable, List, Mapping, Optional, Tuple, TypeVar
 
 # Ignore emacs backups when listing modules
 ignore_modules = r"^\.#|~$"
@@ -437,39 +423,46 @@ def add_func_to_class(name, func):
     return cls
 
 
-K = TypeVar("K")
-V = TypeVar("V")
-
-
 @lazy_lexicographic_ordering
-class HashableMap(typing.MutableMapping[K, V]):
+class HashableMap(collections.abc.MutableMapping):
     """This is a hashable, comparable dictionary.  Hash is performed on
     a tuple of the values in the dictionary."""
 
     __slots__ = ("dict",)
 
     def __init__(self):
-        self.dict: Dict[K, V] = {}
+        self.dict = {}
 
-    def __getitem__(self, key: K) -> V:
+    def __getitem__(self, key):
         return self.dict[key]
 
-    def __setitem__(self, key: K, value: V) -> None:
+    def __setitem__(self, key, value):
         self.dict[key] = value
 
-    def __iter__(self) -> Iterator[K]:
+    def __iter__(self):
         return iter(self.dict)
 
-    def __len__(self) -> int:
+    def __len__(self):
         return len(self.dict)
 
-    def __delitem__(self, key: K) -> None:
+    def __delitem__(self, key):
         del self.dict[key]
 
     def _cmp_iter(self):
         for _, v in sorted(self.items()):
             yield v
 
+    def copy(self):
+        """Type-agnostic clone method.  Preserves subclass type."""
+        # Construct a new dict of my type
+        self_type = type(self)
+        clone = self_type()
+
+        # Copy everything from this dict into it.
+        for key in self:
+            clone[key] = self[key].copy()
+        return clone
+
 
 def match_predicate(*args):
     """Utility function for making string matching predicates.
@@ -714,24 +707,14 @@ def __init__(self, wrapped_object):
 
 
 class Singleton:
-    """Wrapper for lazily initialized singleton objects."""
+    """Simple wrapper for lazily initialized singleton objects."""
 
-    def __init__(self, factory: Callable[[], object]):
+    def __init__(self, factory):
         """Create a new singleton to be inited with the factory function.
 
-        Most factories will simply create the object to be initialized and
-        return it.
-
-        In some cases, e.g. when bootstrapping some global state, the singleton
-        may need to be initialized incrementally. If the factory returns a generator
-        instead of a regular object, the singleton will assign each result yielded by
-        the generator to the singleton instance. This allows methods called by
-        the factory in later stages to refer back to the singleton.
-
         Args:
-            factory (function): function taking no arguments that creates the
-                singleton instance.
-
+            factory (function): function taking no arguments that
+                creates the singleton instance.
         """
         self.factory = factory
         self._instance = None
@@ -739,16 +722,7 @@ def __init__(self, factory: Callable[[], object]):
     @property
     def instance(self):
         if self._instance is None:
-            instance = self.factory()
-
-            if isinstance(instance, types.GeneratorType):
-                # if it's a generator, assign every value
-                for value in instance:
-                    self._instance = value
-            else:
-                # if not, just assign the result like a normal singleton
-                self._instance = instance
-
+            self._instance = self.factory()
         return self._instance
 
     def __getattr__(self, name):
@@ -1053,28 +1027,19 @@ def __exit__(self, exc_type, exc_value, tb):
         return True
 
 
-ClassPropertyType = TypeVar("ClassPropertyType")
-
-
-class classproperty(Generic[ClassPropertyType]):
+class classproperty:
     """Non-data descriptor to evaluate a class-level property. The function that performs
-    the evaluation is injected at creation time and takes an owner (i.e., the class that
-    originated the instance).
+    the evaluation is injected at creation time and take an instance (could be None) and
+    an owner (i.e. the class that originated the instance)
     """
 
-    def __init__(self, callback: Callable[[Any], ClassPropertyType]) -> None:
+    def __init__(self, callback):
         self.callback = callback
 
-    def __get__(self, instance, owner) -> ClassPropertyType:
+    def __get__(self, instance, owner):
         return self.callback(owner)
 
 
-#: A type alias that represents either a classproperty descriptor or a constant value of the same
-#: type. This allows derived classes to override a computed class-level property with a constant
-#: value while retaining type compatibility.
-ClassProperty = Union[ClassPropertyType, classproperty[ClassPropertyType]]
-
-
 class DeprecatedProperty:
     """Data descriptor to error or warn when a deprecated property is accessed.
 

lib/spack/spack/__init__.py

@@ -10,21 +10,9 @@
 import spack.util.git
 
 #: PEP440 canonical <major>.<minor>.<micro>.<devN> string
-__version__ = "1.0.0.dev0"
+__version__ = "1.0.0-alpha.4"
 spack_version = __version__
 
-#: The current Package API version implemented by this version of Spack. The Package API defines
-#: the Python interface for packages as well as the layout of package repositories. The minor
-#: version is incremented when the package API is extended in a backwards-compatible way. The major
-#: version is incremented upon breaking changes. This version is changed independently from the
-#: Spack version.
-package_api_version = (2, 0)
-
-#: The minimum Package API version that this version of Spack is compatible with. This should
-#: always be a tuple of the form ``(major, 0)``, since compatibility with vX.Y implies
-#: compatibility with vX.0.
-min_package_api_version = (1, 0)
-
 
 def __try_int(v):
     try:
@@ -91,6 +79,4 @@ def get_short_version() -> str:
     "get_version",
     "get_spack_commit",
     "get_short_version",
-    "package_api_version",
-    "min_package_api_version",
 ]

lib/spack/spack/aliases.py

@@ -1,20 +0,0 @@
-# Copyright Spack Project Developers. See COPYRIGHT file for details.
-#
-# SPDX-License-Identifier: (Apache-2.0 OR MIT)
-"""Alias names to convert legacy compilers to builtin packages and vice-versa"""
-
-BUILTIN_TO_LEGACY_COMPILER = {
-    "llvm": "clang",
-    "intel-oneapi-compilers": "oneapi",
-    "llvm-amdgpu": "rocmcc",
-    "intel-oneapi-compilers-classic": "intel",
-    "acfl": "arm",
-}
-
-LEGACY_COMPILER_TO_BUILTIN = {
-    "clang": "llvm",
-    "oneapi": "intel-oneapi-compilers",
-    "rocmcc": "llvm-amdgpu",
-    "intel": "intel-oneapi-compilers-classic",
-    "arm": "acfl",
-}

lib/spack/spack/binary_distribution.py

@@ -636,7 +636,14 @@ def tarball_directory_name(spec):
     Return name of the tarball directory according to the convention
     <os>-<architecture>/<compiler>/<package>-<version>/
     """
-    return spec.format_path("{architecture}/{compiler.name}-{compiler.version}/{name}-{version}")
+    if spec.original_spec_format() < 5:
+        compiler = spec.annotations.compiler_node_attribute
+        assert compiler is not None, "a compiler spec is expected"
+        return spec.format_path(
+            f"{spec.architecture}/{compiler.name}-{compiler.version}/{spec.name}-{spec.version}"
+        )
+
+    return spec.format_path(f"{spec.architecture.platform}/{spec.name}-{spec.version}")
 
 
 def tarball_name(spec, ext):
@@ -644,9 +651,17 @@ def tarball_name(spec, ext):
     Return the name of the tarfile according to the convention
     <os>-<architecture>-<package>-<dag_hash><ext>
     """
-    spec_formatted = spec.format_path(
-        "{architecture}-{compiler.name}-{compiler.version}-{name}-{version}-{hash}"
-    )
+    if spec.original_spec_format() < 5:
+        compiler = spec.annotations.compiler_node_attribute
+        assert compiler is not None, "a compiler spec is expected"
+        spec_formatted = (
+            f"{spec.architecture}-{compiler.name}-{compiler.version}-{spec.name}"
+            f"-{spec.version}-{spec.dag_hash()}"
+        )
+    else:
+        spec_formatted = (
+            f"{spec.architecture.platform}-{spec.name}-{spec.version}-{spec.dag_hash()}"
+        )
     return f"{spec_formatted}{ext}"
 
 

lib/spack/spack/bootstrap/_common.py

@@ -234,6 +234,10 @@ def _root_spec(spec_str: str) -> str:
     # Add a compiler and platform requirement to the root spec.
     platform = str(spack.platforms.host())
 
+    if platform == "windows":
+        spec_str += " %msvc"
+    elif platform == "freebsd":
+        spec_str += " %clang"
     spec_str += f" platform={platform}"
     target = archspec.cpu.host().family
     spec_str += f" target={target}"

lib/spack/spack/bootstrap/environment.py

@@ -133,7 +133,7 @@ def mypy_root_spec() -> str:
 
 def black_root_spec() -> str:
     """Return the root spec used to bootstrap black"""
-    return _root_spec("py-black@:25.1.0")
+    return _root_spec("py-black@:24.1.0")
 
 
 def flake8_root_spec() -> str:

lib/spack/spack/build_environment.py

@@ -36,11 +36,9 @@
 import multiprocessing
 import os
 import re
-import signal
 import sys
 import traceback
 import types
-import warnings
 from collections import defaultdict
 from enum import Flag, auto
 from itertools import chain
@@ -115,7 +113,7 @@
 # set_wrapper_variables and used to pass parameters to
 # Spack's compiler wrappers.
 #
-SPACK_COMPILER_WRAPPER_PATH = "SPACK_COMPILER_WRAPPER_PATH"
+SPACK_ENV_PATH = "SPACK_ENV_PATH"
 SPACK_MANAGED_DIRS = "SPACK_MANAGED_DIRS"
 SPACK_INCLUDE_DIRS = "SPACK_INCLUDE_DIRS"
 SPACK_LINK_DIRS = "SPACK_LINK_DIRS"
@@ -574,10 +572,12 @@ def set_package_py_globals(pkg, context: Context = Context.BUILD):
     module.make = DeprecatedExecutable(pkg.name, "make", "gmake")
     module.gmake = DeprecatedExecutable(pkg.name, "gmake", "gmake")
     module.ninja = DeprecatedExecutable(pkg.name, "ninja", "ninja")
-
+    # TODO: johnwparent: add package or builder support to define these build tools
+    # for now there is no entrypoint for builders to define these on their
+    # own
     if sys.platform == "win32":
-        module.nmake = DeprecatedExecutable(pkg.name, "nmake", "msvc")
-        module.msbuild = DeprecatedExecutable(pkg.name, "msbuild", "msvc")
+        module.nmake = Executable("nmake")
+        module.msbuild = Executable("msbuild")
         # analog to configure for win32
         module.cscript = Executable("cscript")
 
@@ -715,6 +715,21 @@ def get_rpath_deps(pkg: spack.package_base.PackageBase) -> List[spack.spec.Spec]
     return _get_rpath_deps_from_spec(pkg.spec, pkg.transitive_rpaths)
 
 
+def load_external_modules(pkg):
+    """Traverse a package's spec DAG and load any external modules.
+
+    Traverse a package's dependencies and load any external modules
+    associated with them.
+
+    Args:
+        pkg (spack.package_base.PackageBase): package to load deps for
+    """
+    for dep in list(pkg.spec.traverse()):
+        external_modules = dep.external_modules or []
+        for external_module in external_modules:
+            load_module(external_module)
+
+
 def setup_package(pkg, dirty, context: Context = Context.BUILD):
     """Execute all environment setup routines."""
     if context not in (Context.BUILD, Context.TEST):
@@ -748,10 +763,8 @@ def setup_package(pkg, dirty, context: Context = Context.BUILD):
 
     tty.debug("setup_package: adding compiler wrappers paths")
     env_by_name = env_mods.group_by_name()
-    for x in env_by_name["SPACK_COMPILER_WRAPPER_PATH"]:
-        assert isinstance(
-            x, PrependPath
-        ), "unexpected setting used for SPACK_COMPILER_WRAPPER_PATH"
+    for x in env_by_name["SPACK_ENV_PATH"]:
+        assert isinstance(x, PrependPath), "unexpected setting used for SPACK_ENV_PATH"
         env_mods.prepend_path("PATH", x.value)
 
     # Check whether we want to force RPATH or RUNPATH
@@ -779,7 +792,7 @@ def setup_package(pkg, dirty, context: Context = Context.BUILD):
 
     # Load modules on an already clean environment, just before applying Spack's
     # own environment modifications. This ensures Spack controls CC/CXX/... variables.
-    load_external_modules(setup_context)
+    load_external_modules(pkg)
 
     # Make sure nothing's strange about the Spack environment.
     validate(env_mods, tty.warn)
@@ -1076,21 +1089,6 @@ def _make_runnable(self, dep: spack.spec.Spec, env: EnvironmentModifications):
                 env.prepend_path("PATH", bin_dir)
 
 
-def load_external_modules(context: SetupContext) -> None:
-    """Traverse a package's spec DAG and load any external modules.
-
-    Traverse a package's dependencies and load any external modules
-    associated with them.
-
-    Args:
-        context: A populated SetupContext object
-    """
-    for spec, _ in context.external:
-        external_modules = spec.external_modules or []
-        for external_module in external_modules:
-            load_module(external_module)
-
-
 def _setup_pkg_and_run(
     serialized_pkg: "spack.subprocess_context.PackageInstallContext",
     function: Callable,
@@ -1189,9 +1187,11 @@ def _setup_pkg_and_run(
         if isinstance(e, (spack.multimethod.NoSuchMethodError, AttributeError)):
             process = "test the installation" if context == "test" else "build from sources"
             error_msg = (
-                "The '{}' package cannot find an attribute while trying to {}. You can fix this "
-                "by updating the {} recipe, and you can also report the issue as a build-error or "
-                "a bug at https://github.com/spack/spack/issues"
+                "The '{}' package cannot find an attribute while trying to {}. "
+                "This might be due to a change in Spack's package format "
+                "to support multiple build-systems for a single package. You can fix this "
+                "by updating the {} recipe, and you can also report the issue as a bug. "
+                "More information at https://spack.readthedocs.io/en/latest/packaging_guide.html#installation-procedure"
             ).format(pkg.name, process, context)
             error_msg = colorize("@*R{{{}}}".format(error_msg))
             error_msg = "{}\n\n{}".format(str(e), error_msg)
@@ -1216,45 +1216,15 @@ def _setup_pkg_and_run(
             input_pipe.close()
 
 
-class BuildProcess:
-    def __init__(self, *, target, args) -> None:
-        self.p = multiprocessing.Process(target=target, args=args)
-
-    def start(self) -> None:
-        self.p.start()
-
-    def is_alive(self) -> bool:
-        return self.p.is_alive()
-
-    def join(self, *, timeout: Optional[int] = None):
-        self.p.join(timeout=timeout)
-
-    def terminate(self):
-        # Opportunity for graceful termination
-        self.p.terminate()
-        self.p.join(timeout=1)
-
-        # If the process didn't gracefully terminate, forcefully kill
-        if self.p.is_alive():
-            # TODO (python 3.6 removal): use self.p.kill() instead, consider removing this class
-            assert isinstance(self.p.pid, int), f"unexpected value for PID: {self.p.pid}"
-            os.kill(self.p.pid, signal.SIGKILL)
-            self.p.join()
-
-    @property
-    def exitcode(self):
-        return self.p.exitcode
-
-
-def start_build_process(pkg, function, kwargs, *, timeout: Optional[int] = None):
+def start_build_process(pkg, function, kwargs):
     """Create a child process to do part of a spack build.
 
     Args:
 
         pkg (spack.package_base.PackageBase): package whose environment we should set up the
             child process for.
-        function (typing.Callable): argless function to run in the child process.
-        timeout: maximum time allowed to finish the execution of function
+        function (typing.Callable): argless function to run in the child
+            process.
 
     Usage::
 
@@ -1282,14 +1252,14 @@ def child_fun():
         # Forward sys.stdin when appropriate, to allow toggling verbosity
         if sys.platform != "win32" and sys.stdin.isatty() and hasattr(sys.stdin, "fileno"):
             input_fd = Connection(os.dup(sys.stdin.fileno()))
-        mflags = os.environ.get("MAKEFLAGS")
-        if mflags is not None:
+        mflags = os.environ.get("MAKEFLAGS", False)
+        if mflags:
             m = re.search(r"--jobserver-[^=]*=(\d),(\d)", mflags)
             if m:
                 jobserver_fd1 = Connection(int(m.group(1)))
                 jobserver_fd2 = Connection(int(m.group(2)))
 
-        p = BuildProcess(
+        p = multiprocessing.Process(
             target=_setup_pkg_and_run,
             args=(
                 serialized_pkg,
@@ -1323,17 +1293,14 @@ def exitcode_msg(p):
         typ = "exit" if p.exitcode >= 0 else "signal"
         return f"{typ} {abs(p.exitcode)}"
 
-    p.join(timeout=timeout)
-    if p.is_alive():
-        warnings.warn(f"Terminating process, since the timeout of {timeout}s was exceeded")
-        p.terminate()
-        p.join()
-
     try:
         child_result = read_pipe.recv()
     except EOFError:
+        p.join()
         raise InstallError(f"The process has stopped unexpectedly ({exitcode_msg(p)})")
 
+    p.join()
+
     # If returns a StopPhase, raise it
     if isinstance(child_result, spack.error.StopPhase):
         # do not print

lib/spack/spack/build_systems/autotools.py

@@ -16,7 +16,6 @@
 import spack.package_base
 import spack.phase_callbacks
 import spack.spec
-import spack.util.environment
 import spack.util.prefix
 from spack.directives import build_system, conflicts, depends_on
 from spack.multimethod import when
@@ -847,9 +846,7 @@ def _remove_libtool_archives(self) -> None:
             with open(self._removed_la_files_log, mode="w", encoding="utf-8") as f:
                 f.write("\n".join(libtool_files))
 
-    def setup_build_environment(
-        self, env: spack.util.environment.EnvironmentModifications
-    ) -> None:
+    def setup_build_environment(self, env):
         if self.spec.platform == "darwin" and macos_version() >= Version("11"):
             # Many configure files rely on matching '10.*' for macOS version
             # detection and fail to add flags if it shows as version 11.

lib/spack/spack/build_systems/cached_cmake.py

@@ -2,10 +2,9 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 import collections.abc
-import enum
 import os
 import re
-from typing import Optional, Tuple
+from typing import Tuple
 
 import llnl.util.filesystem as fs
 import llnl.util.tty as tty
@@ -14,7 +13,6 @@
 import spack.spec
 import spack.util.prefix
 from spack.directives import depends_on
-from spack.util.executable import which_string
 
 from .cmake import CMakeBuilder, CMakePackage
 
@@ -180,64 +178,6 @@ def initconfig_compiler_entries(self):
 
         return entries
 
-    class Scheduler(enum.Enum):
-        LSF = enum.auto()
-        SLURM = enum.auto()
-        FLUX = enum.auto()
-
-    def get_scheduler(self) -> Optional[Scheduler]:
-        spec = self.pkg.spec
-
-        # Check for Spectrum-mpi, which always uses LSF or LSF MPI variant
-        if spec.satisfies("^spectrum-mpi") or spec["mpi"].satisfies("schedulers=lsf"):
-            return self.Scheduler.LSF
-
-        # Check for Slurm MPI variants
-        slurm_checks = ["+slurm", "schedulers=slurm", "process_managers=slurm"]
-        if any(spec["mpi"].satisfies(variant) for variant in slurm_checks):
-            return self.Scheduler.SLURM
-
-        # TODO improve this when MPI implementations support flux
-        # Do this check last to avoid using a flux wrapper present next to Slurm/ LSF schedulers
-        if which_string("flux") is not None:
-            return self.Scheduler.FLUX
-
-        return None
-
-    def get_mpi_exec(self) -> Optional[str]:
-        spec = self.pkg.spec
-        scheduler = self.get_scheduler()
-
-        if scheduler == self.Scheduler.LSF:
-            return which_string("lrun")
-
-        elif scheduler == self.Scheduler.SLURM:
-            if spec["mpi"].external:
-                return which_string("srun")
-            else:
-                return os.path.join(spec["slurm"].prefix.bin, "srun")
-
-        elif scheduler == self.Scheduler.FLUX:
-            flux = which_string("flux")
-            return f"{flux};run" if flux else None
-
-        elif hasattr(spec["mpi"].package, "mpiexec"):
-            return spec["mpi"].package.mpiexec
-
-        else:
-            mpiexec = os.path.join(spec["mpi"].prefix.bin, "mpirun")
-            if not os.path.exists(mpiexec):
-                mpiexec = os.path.join(spec["mpi"].prefix.bin, "mpiexec")
-            return mpiexec
-
-    def get_mpi_exec_num_proc(self) -> str:
-        scheduler = self.get_scheduler()
-
-        if scheduler in [self.Scheduler.FLUX, self.Scheduler.LSF, self.Scheduler.SLURM]:
-            return "-n"
-        else:
-            return "-np"
-
     def initconfig_mpi_entries(self):
         spec = self.pkg.spec
 
@@ -257,10 +197,27 @@ def initconfig_mpi_entries(self):
         if hasattr(spec["mpi"], "mpifc"):
             entries.append(cmake_cache_path("MPI_Fortran_COMPILER", spec["mpi"].mpifc))
 
-        # Determine MPIEXEC
-        mpiexec = self.get_mpi_exec()
+        # Check for slurm
+        using_slurm = False
+        slurm_checks = ["+slurm", "schedulers=slurm", "process_managers=slurm"]
+        if any(spec["mpi"].satisfies(variant) for variant in slurm_checks):
+            using_slurm = True
 
-        if mpiexec is None or not os.path.exists(mpiexec.split(";")[0]):
+        # Determine MPIEXEC
+        if using_slurm:
+            if spec["mpi"].external:
+                # Heuristic until we have dependents on externals
+                mpiexec = "/usr/bin/srun"
+            else:
+                mpiexec = os.path.join(spec["slurm"].prefix.bin, "srun")
+        elif hasattr(spec["mpi"].package, "mpiexec"):
+            mpiexec = spec["mpi"].package.mpiexec
+        else:
+            mpiexec = os.path.join(spec["mpi"].prefix.bin, "mpirun")
+            if not os.path.exists(mpiexec):
+                mpiexec = os.path.join(spec["mpi"].prefix.bin, "mpiexec")
+
+        if not os.path.exists(mpiexec):
             msg = "Unable to determine MPIEXEC, %s tests may fail" % self.pkg.name
             entries.append("# {0}\n".format(msg))
             tty.warn(msg)
@@ -273,7 +230,10 @@ def initconfig_mpi_entries(self):
                 entries.append(cmake_cache_path("MPIEXEC", mpiexec))
 
         # Determine MPIEXEC_NUMPROC_FLAG
-        entries.append(cmake_cache_string("MPIEXEC_NUMPROC_FLAG", self.get_mpi_exec_num_proc()))
+        if using_slurm:
+            entries.append(cmake_cache_string("MPIEXEC_NUMPROC_FLAG", "-n"))
+        else:
+            entries.append(cmake_cache_string("MPIEXEC_NUMPROC_FLAG", "-np"))
 
         return entries
 
@@ -316,18 +276,23 @@ def initconfig_hardware_entries(self):
             entries.append("# ROCm")
             entries.append("#------------------{0}\n".format("-" * 30))
 
-            rocm_root = os.path.dirname(spec["llvm-amdgpu"].prefix)
-            entries.append(cmake_cache_path("ROCM_PATH", rocm_root))
-
+            # Explicitly setting HIP_ROOT_DIR may be a patch that is no longer necessary
+            entries.append(cmake_cache_path("HIP_ROOT_DIR", "{0}".format(spec["hip"].prefix)))
+            llvm_bin = spec["llvm-amdgpu"].prefix.bin
+            llvm_prefix = spec["llvm-amdgpu"].prefix
+            # Some ROCm systems seem to point to /<path>/rocm-<ver>/ and
+            # others point to /<path>/rocm-<ver>/llvm
+            if os.path.basename(os.path.normpath(llvm_prefix)) != "llvm":
+                llvm_bin = os.path.join(llvm_prefix, "llvm/bin/")
+            entries.append(
+                cmake_cache_filepath("CMAKE_HIP_COMPILER", os.path.join(llvm_bin, "clang++"))
+            )
             archs = self.spec.variants["amdgpu_target"].value
             if archs[0] != "none":
                 arch_str = ";".join(archs)
                 entries.append(cmake_cache_string("CMAKE_HIP_ARCHITECTURES", arch_str))
-
-            llvm_bin = spec["llvm-amdgpu"].prefix.bin
-            entries.append(
-                cmake_cache_filepath("CMAKE_HIP_COMPILER", os.path.join(llvm_bin, "amdclang++"))
-            )
+                entries.append(cmake_cache_string("AMDGPU_TARGETS", arch_str))
+                entries.append(cmake_cache_string("GPU_TARGETS", arch_str))
 
             if spec.satisfies("%gcc"):
                 entries.append(
@@ -336,15 +301,6 @@ def initconfig_hardware_entries(self):
                     )
                 )
 
-            # Extra definitions that might be required in other cases
-            if not spec.satisfies("^blt"):
-                entries.append(cmake_cache_path("HIP_ROOT_DIR", "{0}".format(spec["hip"].prefix)))
-
-                if archs[0] != "none":
-                    arch_str = ";".join(archs)
-                    entries.append(cmake_cache_string("AMDGPU_TARGETS", arch_str))
-                    entries.append(cmake_cache_string("GPU_TARGETS", arch_str))
-
         return entries
 
     def std_initconfig_entries(self):

lib/spack/spack/build_systems/cargo.py

@@ -8,7 +8,6 @@
 import spack.package_base
 import spack.phase_callbacks
 import spack.spec
-import spack.util.environment
 import spack.util.prefix
 from spack.directives import build_system, depends_on
 from spack.multimethod import when
@@ -87,9 +86,7 @@ def check_args(self):
         """Argument for ``cargo test`` during check phase"""
         return []
 
-    def setup_build_environment(
-        self, env: spack.util.environment.EnvironmentModifications
-    ) -> None:
+    def setup_build_environment(self, env):
         env.set("CARGO_HOME", self.stage.path)
 
     def build(

lib/spack/spack/build_systems/compiler.py

@@ -45,12 +45,7 @@ class CompilerPackage(spack.package_base.PackageBase):
     compiler_languages: Sequence[str] = ["c", "cxx", "fortran"]
 
     #: Relative path to compiler wrappers
-    compiler_wrapper_link_paths: Dict[str, str] = {}
-
-    #: Optimization flags
-    opt_flags: Sequence[str] = []
-    #: Flags for generating debug information
-    debug_flags: Sequence[str] = []
+    link_paths: Dict[str, str] = {}
 
     def __init__(self, spec: "spack.spec.Spec"):
         super().__init__(spec)
@@ -164,7 +159,7 @@ def determine_variants(cls, exes: Sequence[Path], version_str: str) -> Tuple:
     #: Flag to activate OpenMP support
     openmp_flag: str = "-fopenmp"
 
-    implicit_rpath_libs: List[str] = []
+    required_libs: List[str] = []
 
     def standard_flag(self, *, language: str, standard: str) -> str:
         """Returns the flag used to enforce a given standard for a language"""

lib/spack/spack/build_systems/go.py

@@ -8,7 +8,6 @@
 import spack.package_base
 import spack.phase_callbacks
 import spack.spec
-import spack.util.environment
 import spack.util.prefix
 from spack.directives import build_system, depends_on
 from spack.multimethod import when
@@ -69,9 +68,7 @@ class GoBuilder(BuilderWithDefaults):
     #: Callback names for install-time test
     install_time_test_callbacks = ["check"]
 
-    def setup_build_environment(
-        self, env: spack.util.environment.EnvironmentModifications
-    ) -> None:
+    def setup_build_environment(self, env):
         env.set("GO111MODULE", "on")
         env.set("GOTOOLCHAIN", "local")
         env.set("GOPATH", fs.join_path(self.pkg.stage.path, "go"))

lib/spack/spack/build_systems/intel.py

@@ -23,7 +23,6 @@
 
 import spack.error
 import spack.phase_callbacks
-import spack.spec
 from spack.build_environment import dso_suffix
 from spack.error import InstallError
 from spack.util.environment import EnvironmentModifications
@@ -1017,7 +1016,7 @@ def libs(self):
         debug_print(result)
         return result
 
-    def setup_run_environment(self, env: EnvironmentModifications) -> None:
+    def setup_run_environment(self, env):
         """Adds environment variables to the generated module file.
 
         These environment variables come from running:
@@ -1050,13 +1049,11 @@ def setup_run_environment(self, env: EnvironmentModifications) -> None:
             env.set("F77", self.prefix.bin.ifort)
             env.set("F90", self.prefix.bin.ifort)
 
-    def setup_dependent_build_environment(
-        self, env: EnvironmentModifications, dependent_spec: spack.spec.Spec
-    ) -> None:
+    def setup_dependent_build_environment(self, env, dependent_spec):
         # NB: This function is overwritten by 'mpi' provider packages:
         #
-        # var/spack/repos/spack_repo/builtin/packages/intel_mpi/package.py
-        # var/spack/repos/spack_repo/builtin/packages/intel_parallel_studio/package.py
+        # var/spack/repos/builtin/packages/intel-mpi/package.py
+        # var/spack/repos/builtin/packages/intel-parallel-studio/package.py
         #
         # They call _setup_dependent_env_callback() as well, but with the
         # dictionary kwarg compilers_of_client{} present and populated.
@@ -1064,12 +1061,7 @@ def setup_dependent_build_environment(
         # Handle everything in a callback version.
         self._setup_dependent_env_callback(env, dependent_spec)
 
-    def _setup_dependent_env_callback(
-        self,
-        env: EnvironmentModifications,
-        dependent_spec: spack.spec.Spec,
-        compilers_of_client={},
-    ) -> None:
+    def _setup_dependent_env_callback(self, env, dependent_spec, compilers_of_client={}):
         # Expected to be called from a client's
         # setup_dependent_build_environment(),
         # with args extended to convey the client's compilers as needed.

lib/spack/spack/build_systems/lua.py

@@ -8,7 +8,6 @@
 import spack.builder
 import spack.package_base
 import spack.spec
-import spack.util.environment
 import spack.util.executable
 import spack.util.prefix
 from spack.directives import build_system, depends_on, extends
@@ -115,7 +114,5 @@ def install(
     def _luarocks_config_path(self):
         return os.path.join(self.pkg.stage.source_path, "spack_luarocks.lua")
 
-    def setup_build_environment(
-        self, env: spack.util.environment.EnvironmentModifications
-    ) -> None:
+    def setup_build_environment(self, env):
         env.set("LUAROCKS_CONFIG", self._luarocks_config_path())

lib/spack/spack/build_systems/octave.py

@@ -4,7 +4,6 @@
 import spack.builder
 import spack.package_base
 import spack.spec
-import spack.util.environment
 import spack.util.prefix
 from spack.directives import build_system, extends
 from spack.multimethod import when
@@ -58,9 +57,7 @@ def install(
             "pkg prefix %s; pkg install %s" % (prefix, self.pkg.stage.archive_file),
         )
 
-    def setup_build_environment(
-        self, env: spack.util.environment.EnvironmentModifications
-    ) -> None:
+    def setup_build_environment(self, env):
         # octave does not like those environment variables to be set:
         env.unset("CC")
         env.unset("CXX")

lib/spack/spack/build_systems/oneapi.py

@@ -106,8 +106,8 @@ def install_component(self, installer_path):
 
             bash = Executable("bash")
 
-            # Installer writes files in ~/intel set HOME so it goes to staging directory
-            bash.add_default_env("HOME", join_path(self.stage.path, "home"))
+            # Installer writes files in ~/intel set HOME so it goes to prefix
+            bash.add_default_env("HOME", self.prefix)
             # Installer checks $XDG_RUNTIME_DIR/.bootstrapper_lock_file as well
             bash.add_default_env("XDG_RUNTIME_DIR", join_path(self.stage.path, "runtime"))
 
@@ -132,7 +132,7 @@ def install_component(self, installer_path):
         if not isdir(install_dir):
             raise RuntimeError("install failed to directory: {0}".format(install_dir))
 
-    def setup_run_environment(self, env: EnvironmentModifications) -> None:
+    def setup_run_environment(self, env):
         """Adds environment variables to the generated module file.
 
         These environment variables come from running:
@@ -311,4 +311,4 @@ def ld_flags(self):
 
 
 #: Tuple of Intel math libraries, exported to packages
-INTEL_MATH_LIBRARIES = ("intel-oneapi-mkl",)
+INTEL_MATH_LIBRARIES = ("intel-mkl", "intel-oneapi-mkl", "intel-parallel-studio")

lib/spack/spack/build_systems/python.py

@@ -13,9 +13,9 @@
 import archspec
 
 import llnl.util.filesystem as fs
+import llnl.util.lang as lang
 import llnl.util.tty as tty
 from llnl.util.filesystem import HeaderList, LibraryList, join_path
-from llnl.util.lang import ClassProperty, classproperty, match_predicate
 
 import spack.builder
 import spack.config
@@ -139,7 +139,7 @@ def view_file_conflicts(self, view, merge_map):
             ext_map = view.extensions_layout.extension_map(self.extendee_spec)
             namespaces = set(x.package.py_namespace for x in ext_map.values())
             namespace_re = r"site-packages/{0}/__init__.py".format(self.py_namespace)
-            find_namespace = match_predicate(namespace_re)
+            find_namespace = lang.match_predicate(namespace_re)
             if self.py_namespace in namespaces:
                 conflicts = list(x for x in conflicts if not find_namespace(x))
 
@@ -206,7 +206,7 @@ def remove_files_from_view(self, view, merge_map):
                 spec.package.py_namespace for name, spec in ext_map.items() if name != self.name
             )
             if self.py_namespace in remaining_namespaces:
-                namespace_init = match_predicate(
+                namespace_init = lang.match_predicate(
                     r"site-packages/{0}/__init__.py".format(self.py_namespace)
                 )
                 ignore_namespace = True
@@ -324,27 +324,6 @@ def get_external_python_for_prefix(self):
         raise StopIteration("No external python could be detected for %s to depend on" % self.spec)
 
 
-def _homepage(cls: "PythonPackage") -> Optional[str]:
-    """Get the homepage from PyPI if available."""
-    if cls.pypi:
-        name = cls.pypi.split("/")[0]
-        return f"https://pypi.org/project/{name}/"
-    return None
-
-
-def _url(cls: "PythonPackage") -> Optional[str]:
-    if cls.pypi:
-        return f"https://files.pythonhosted.org/packages/source/{cls.pypi[0]}/{cls.pypi}"
-    return None
-
-
-def _list_url(cls: "PythonPackage") -> Optional[str]:
-    if cls.pypi:
-        name = cls.pypi.split("/")[0]
-        return f"https://pypi.org/simple/{name}/"
-    return None
-
-
 class PythonPackage(PythonExtension):
     """Specialized class for packages that are built using pip."""
 
@@ -372,9 +351,25 @@ class PythonPackage(PythonExtension):
 
     py_namespace: Optional[str] = None
 
-    homepage: ClassProperty[Optional[str]] = classproperty(_homepage)
-    url: ClassProperty[Optional[str]] = classproperty(_url)
-    list_url: ClassProperty[Optional[str]] = classproperty(_list_url)
+    @lang.classproperty
+    def homepage(cls) -> Optional[str]:  # type: ignore[override]
+        if cls.pypi:
+            name = cls.pypi.split("/")[0]
+            return f"https://pypi.org/project/{name}/"
+        return None
+
+    @lang.classproperty
+    def url(cls) -> Optional[str]:
+        if cls.pypi:
+            return f"https://files.pythonhosted.org/packages/source/{cls.pypi[0]}/{cls.pypi}"
+        return None
+
+    @lang.classproperty
+    def list_url(cls) -> Optional[str]:  # type: ignore[override]
+        if cls.pypi:
+            name = cls.pypi.split("/")[0]
+            return f"https://pypi.org/simple/{name}/"
+        return None
 
     @property
     def python_spec(self) -> Spec:

lib/spack/spack/build_systems/r.py

@@ -3,8 +3,8 @@
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 from typing import Optional, Tuple
 
+import llnl.util.lang as lang
 from llnl.util.filesystem import mkdirp
-from llnl.util.lang import ClassProperty, classproperty
 
 from spack.directives import extends
 
@@ -54,32 +54,6 @@ def install(self, pkg, spec, prefix):
         pkg.module.R(*args)
 
 
-def _homepage(cls: "RPackage") -> Optional[str]:
-    if cls.cran:
-        return f"https://cloud.r-project.org/package={cls.cran}"
-    elif cls.bioc:
-        return f"https://bioconductor.org/packages/{cls.bioc}"
-    return None
-
-
-def _url(cls: "RPackage") -> Optional[str]:
-    if cls.cran:
-        return f"https://cloud.r-project.org/src/contrib/{cls.cran}_{str(list(cls.versions)[0])}.tar.gz"
-    return None
-
-
-def _list_url(cls: "RPackage") -> Optional[str]:
-    if cls.cran:
-        return f"https://cloud.r-project.org/src/contrib/Archive/{cls.cran}/"
-    return None
-
-
-def _git(cls: "RPackage") -> Optional[str]:
-    if cls.bioc:
-        return f"https://git.bioconductor.org/packages/{cls.bioc}"
-    return None
-
-
 class RPackage(Package):
     """Specialized class for packages that are built using R.
 
@@ -103,7 +77,24 @@ class RPackage(Package):
 
     extends("r")
 
-    homepage: ClassProperty[Optional[str]] = classproperty(_homepage)
-    url: ClassProperty[Optional[str]] = classproperty(_url)
-    list_url: ClassProperty[Optional[str]] = classproperty(_list_url)
-    git: ClassProperty[Optional[str]] = classproperty(_git)
+    @lang.classproperty
+    def homepage(cls):
+        if cls.cran:
+            return f"https://cloud.r-project.org/package={cls.cran}"
+        elif cls.bioc:
+            return f"https://bioconductor.org/packages/{cls.bioc}"
+
+    @lang.classproperty
+    def url(cls):
+        if cls.cran:
+            return f"https://cloud.r-project.org/src/contrib/{cls.cran}_{str(list(cls.versions)[0])}.tar.gz"
+
+    @lang.classproperty
+    def list_url(cls):
+        if cls.cran:
+            return f"https://cloud.r-project.org/src/contrib/Archive/{cls.cran}/"
+
+    @lang.classproperty
+    def git(cls):
+        if cls.bioc:
+            return f"https://git.bioconductor.org/packages/{cls.bioc}"

lib/spack/spack/build_systems/racket.py

@@ -5,8 +5,8 @@
 from typing import Optional, Tuple
 
 import llnl.util.filesystem as fs
+import llnl.util.lang as lang
 import llnl.util.tty as tty
-from llnl.util.lang import ClassProperty, classproperty
 
 import spack.builder
 import spack.spec
@@ -19,12 +19,6 @@
 from spack.util.executable import Executable, ProcessError
 
 
-def _homepage(cls: "RacketPackage") -> Optional[str]:
-    if cls.racket_name:
-        return f"https://pkgs.racket-lang.org/package/{cls.racket_name}"
-    return None
-
-
 class RacketPackage(PackageBase):
     """Specialized class for packages that are built using Racket's
     `raco pkg install` and `raco setup` commands.
@@ -43,7 +37,13 @@ class RacketPackage(PackageBase):
     extends("racket", when="build_system=racket")
 
     racket_name: Optional[str] = None
-    homepage: ClassProperty[Optional[str]] = classproperty(_homepage)
+    parallel = True
+
+    @lang.classproperty
+    def homepage(cls):
+        if cls.racket_name:
+            return "https://pkgs.racket-lang.org/package/{0}".format(cls.racket_name)
+        return None
 
 
 @spack.builder.builder("racket")

lib/spack/spack/builder.py

@@ -59,7 +59,7 @@ def __call__(self, spec, prefix):
 def get_builder_class(pkg, name: str) -> Optional[Type["Builder"]]:
     """Return the builder class if a package module defines it."""
     cls = getattr(pkg.module, name, None)
-    if cls and spack.repo.is_package_module(cls.__module__):
+    if cls and cls.__module__.startswith(spack.repo.ROOT_PYTHON_NAMESPACE):
         return cls
     return None
 
@@ -121,7 +121,6 @@ def __init__(self, wrapped_pkg_object, root_builder):
                 new_cls_name,
                 bases,
                 {
-                    "__module__": package_cls.__module__,
                     "run_tests": property(lambda x: x.wrapped_package_object.run_tests),
                     "test_requires_compiler": property(
                         lambda x: x.wrapped_package_object.test_requires_compiler
@@ -130,6 +129,7 @@ def __init__(self, wrapped_pkg_object, root_builder):
                     "tester": property(lambda x: x.wrapped_package_object.tester),
                 },
             )
+            new_cls.__module__ = package_cls.__module__
             self.__class__ = new_cls
             self.__dict__.update(wrapped_pkg_object.__dict__)
 
@@ -185,16 +185,10 @@ def __init__(self, pkg):
         # These two methods don't follow the (self, spec, prefix) signature of phases nor
         # the (self) signature of methods, so they are added explicitly to avoid using a
         # catch-all (*args, **kwargs)
-        def setup_build_environment(
-            self, env: spack.util.environment.EnvironmentModifications
-        ) -> None:
+        def setup_build_environment(self, env):
             return self.pkg_with_dispatcher.setup_build_environment(env)
 
-        def setup_dependent_build_environment(
-            self,
-            env: spack.util.environment.EnvironmentModifications,
-            dependent_spec: spack.spec.Spec,
-        ) -> None:
+        def setup_dependent_build_environment(self, env, dependent_spec):
             return self.pkg_with_dispatcher.setup_dependent_build_environment(env, dependent_spec)
 
     return Adapter(pkg)
@@ -408,7 +402,7 @@ def fixup_install(self):
                 # do something after the package is installed
                 pass
 
-           def setup_build_environment(self, env: EnvironmentModifications) -> None:
+           def setup_build_environment(self, env):
                 env.set("MY_ENV_VAR", "my_value")
 
         class CMakeBuilder(cmake.CMakeBuilder, AnyBuilder):

lib/spack/spack/ci/__init__.py

@@ -6,7 +6,6 @@
 import codecs
 import json
 import os
-import pathlib
 import re
 import shutil
 import stat
@@ -14,7 +13,7 @@
 import tempfile
 import zipfile
 from collections import namedtuple
-from typing import Callable, Dict, List, Optional, Set, Union
+from typing import Callable, Dict, List, Set
 from urllib.request import Request
 
 import llnl.path
@@ -33,7 +32,6 @@
 import spack.paths
 import spack.repo
 import spack.spec
-import spack.store
 import spack.util.git
 import spack.util.gpg as gpg_util
 import spack.util.spack_yaml as syaml
@@ -42,7 +40,6 @@
 from spack import traverse
 from spack.error import SpackError
 from spack.reporters.cdash import SPACK_CDASH_TIMEOUT
-from spack.version import GitVersion, StandardVersion
 
 from .common import (
     IS_WINDOWS,
@@ -81,45 +78,6 @@ def get_change_revisions():
     return None, None
 
 
-def get_added_versions(
-    checksums_version_dict: Dict[str, Union[StandardVersion, GitVersion]],
-    path: str,
-    from_ref: str = "HEAD~1",
-    to_ref: str = "HEAD",
-) -> List[Union[StandardVersion, GitVersion]]:
-    """Get a list of the versions added between `from_ref` and `to_ref`.
-    Args:
-       checksums_version_dict (Dict): all package versions keyed by known checksums.
-       path (str): path to the package.py
-       from_ref (str): oldest git ref, defaults to `HEAD~1`
-       to_ref (str): newer git ref, defaults to `HEAD`
-    Returns: list of versions added between refs
-    """
-    git_exe = spack.util.git.git(required=True)
-
-    # Gather git diff
-    diff_lines = git_exe("diff", from_ref, to_ref, "--", path, output=str).split("\n")
-
-    # Store added and removed versions
-    # Removed versions are tracked here to determine when versions are moved in a file
-    # and show up as both added and removed in a git diff.
-    added_checksums = set()
-    removed_checksums = set()
-
-    # Scrape diff for modified versions and prune added versions if they show up
-    # as also removed (which means they've actually just moved in the file and
-    # we shouldn't need to rechecksum them)
-    for checksum in checksums_version_dict.keys():
-        for line in diff_lines:
-            if checksum in line:
-                if line.startswith("+"):
-                    added_checksums.add(checksum)
-                if line.startswith("-"):
-                    removed_checksums.add(checksum)
-
-    return [checksums_version_dict[c] for c in added_checksums - removed_checksums]
-
-
 def get_stack_changed(env_path, rev1="HEAD^", rev2="HEAD"):
     """Given an environment manifest path and two revisions to compare, return
     whether or not the stack was changed.  Returns True if the environment
@@ -150,10 +108,10 @@ def get_stack_changed(env_path, rev1="HEAD^", rev2="HEAD"):
     return False
 
 
-def compute_affected_packages(rev1: str = "HEAD^", rev2: str = "HEAD") -> Set[str]:
+def compute_affected_packages(rev1="HEAD^", rev2="HEAD"):
     """Determine which packages were added, removed or changed
     between rev1 and rev2, and return the names as a set"""
-    return spack.repo.get_all_package_diffs("ARC", spack.repo.builtin_repo(), rev1=rev1, rev2=rev2)
+    return spack.repo.get_all_package_diffs("ARC", rev1=rev1, rev2=rev2)
 
 
 def get_spec_filter_list(env, affected_pkgs, dependent_traverse_depth=None):
@@ -265,7 +223,7 @@ def rebuild_filter(s: spack.spec.Spec) -> RebuildDecision:
 
 def _format_pruning_message(spec: spack.spec.Spec, prune: bool, reasons: List[str]) -> str:
     reason_msg = ", ".join(reasons)
-    spec_fmt = "{name}{@version}{/hash:7}{%compiler}"
+    spec_fmt = "{name}{@version}{%compiler}{/hash:7}"
 
     if not prune:
         status = colorize("@*g{[x]}  ")
@@ -614,40 +572,29 @@ def copy_stage_logs_to_artifacts(job_spec: spack.spec.Spec, job_log_dir: str) ->
     job_spec, and attempts to copy the files into the directory given
     by job_log_dir.
 
-    Parameters:
+    Args:
         job_spec: spec associated with spack install log
         job_log_dir: path into which build log should be copied
     """
     tty.debug(f"job spec: {job_spec}")
-    if not job_spec.concrete:
-        tty.warn("Cannot copy artifacts for non-concrete specs")
+
+    try:
+        pkg_cls = spack.repo.PATH.get_pkg_class(job_spec.name)
+        job_pkg = pkg_cls(job_spec)
+        tty.debug(f"job package: {job_pkg}")
+    except AssertionError:
+        msg = f"Cannot copy stage logs: job spec ({job_spec}) must be concrete"
+        tty.error(msg)
         return
 
-    package_metadata_root = pathlib.Path(spack.store.STORE.layout.metadata_path(job_spec))
-    if not os.path.isdir(package_metadata_root):
-        # Fallback to using the stage directory
-        job_pkg = job_spec.package
-
-        package_metadata_root = pathlib.Path(job_pkg.stage.path)
-        archive_files = spack.builder.create(job_pkg).archive_files
-        tty.warn("Package not installed, falling back to use stage dir")
-        tty.debug(f"stage dir: {package_metadata_root}")
-    else:
-        # Get the package's archived files
-        archive_files = []
-        archive_root = package_metadata_root / "archived-files"
-        if os.path.isdir(archive_root):
-            archive_files = [str(f) for f in archive_root.rglob("*") if os.path.isfile(f)]
-        else:
-            tty.debug(f"No archived files detected at {archive_root}")
-
-    # Try zipped and unzipped versions of the build log
-    build_log_zipped = package_metadata_root / "spack-build-out.txt.gz"
-    build_log = package_metadata_root / "spack-build-out.txt"
-    build_env_mods = package_metadata_root / "spack-build-env.txt"
-
-    for f in [build_log_zipped, build_log, build_env_mods, *archive_files]:
-        copy_files_to_artifacts(str(f), job_log_dir, compress_artifacts=True)
+    stage_dir = job_pkg.stage.path
+    tty.debug(f"stage dir: {stage_dir}")
+    for file in [
+        job_pkg.log_path,
+        job_pkg.env_mods_path,
+        *spack.builder.create(job_pkg).archive_files,
+    ]:
+        copy_files_to_artifacts(file, job_log_dir)
 
 
 def copy_test_logs_to_artifacts(test_stage, job_test_dir):
@@ -660,12 +607,11 @@ def copy_test_logs_to_artifacts(test_stage, job_test_dir):
     """
     tty.debug(f"test stage: {test_stage}")
     if not os.path.exists(test_stage):
-        tty.error(f"Cannot copy test logs: job test stage ({test_stage}) does not exist")
+        msg = f"Cannot copy test logs: job test stage ({test_stage}) does not exist"
+        tty.error(msg)
         return
 
-    copy_files_to_artifacts(
-        os.path.join(test_stage, "*", "*.txt"), job_test_dir, compress_artifacts=True
-    )
+    copy_files_to_artifacts(os.path.join(test_stage, "*", "*.txt"), job_test_dir)
 
 
 def download_and_extract_artifacts(url, work_dir) -> str:
@@ -1304,34 +1250,35 @@ def display_broken_spec_messages(base_url, hashes):
         tty.msg(msg)
 
 
-def run_standalone_tests(
-    *,
-    cdash: Optional[CDashHandler] = None,
-    fail_fast: bool = False,
-    log_file: Optional[str] = None,
-    job_spec: Optional[spack.spec.Spec] = None,
-    repro_dir: Optional[str] = None,
-    timeout: Optional[int] = None,
-):
+def run_standalone_tests(**kwargs):
     """Run stand-alone tests on the current spec.
 
-    Args:
-        cdash: cdash handler instance
-        fail_fast: terminate tests after the first failure
-        log_file: test log file name if NOT CDash reporting
-        job_spec: spec that was built
-        repro_dir: reproduction directory
-        timeout: maximum time (in seconds) that tests are allowed to run
+    Arguments:
+       kwargs (dict): dictionary of arguments used to run the tests
+
+    List of recognized keys:
+
+    * "cdash" (CDashHandler): (optional) cdash handler instance
+    * "fail_fast" (bool): (optional) terminate tests after the first failure
+    * "log_file" (str): (optional) test log file name if NOT CDash reporting
+    * "job_spec" (Spec): spec that was built
+    * "repro_dir" (str): reproduction directory
     """
+    cdash = kwargs.get("cdash")
+    fail_fast = kwargs.get("fail_fast")
+    log_file = kwargs.get("log_file")
+
     if cdash and log_file:
         tty.msg(f"The test log file {log_file} option is ignored with CDash reporting")
         log_file = None
 
     # Error out but do NOT terminate if there are missing required arguments.
+    job_spec = kwargs.get("job_spec")
     if not job_spec:
         tty.error("Job spec is required to run stand-alone tests")
         return
 
+    repro_dir = kwargs.get("repro_dir")
     if not repro_dir:
         tty.error("Reproduction directory is required for stand-alone tests")
         return
@@ -1340,9 +1287,6 @@ def run_standalone_tests(
     if fail_fast:
         test_args.append("--fail-fast")
 
-    if timeout is not None:
-        test_args.extend(["--timeout", str(timeout)])
-
     if cdash:
         test_args.extend(cdash.args())
     else:

lib/spack/spack/ci/common.py

@@ -2,13 +2,9 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 import copy
-import errno
-import glob
-import gzip
 import json
 import os
 import re
-import shutil
 import sys
 import time
 from collections import deque
@@ -29,7 +25,6 @@
 import spack.mirrors.mirror
 import spack.schema
 import spack.spec
-import spack.util.compression as compression
 import spack.util.spack_yaml as syaml
 import spack.util.url as url_util
 import spack.util.web as web_util
@@ -45,67 +40,22 @@
 _urlopen = web_util.urlopen
 
 
-def copy_gzipped(glob_or_path: str, dest: str) -> None:
-    """Copy all of the files in the source glob/path to the destination.
-
-    Args:
-        glob_or_path: path to file to test
-        dest: destination path to copy to
-    """
-
-    files = glob.glob(glob_or_path)
-    if not files:
-        raise OSError("No such file or directory: '{0}'".format(glob_or_path), errno.ENOENT)
-    if len(files) > 1 and not os.path.isdir(dest):
-        raise ValueError(
-            "'{0}' matches multiple files but '{1}' is not a directory".format(glob_or_path, dest)
-        )
-
-    def is_gzipped(path):
-        with open(path, "rb") as fd:
-            return compression.GZipFileType().matches_magic(fd)
-
-    for src in files:
-        if is_gzipped(src):
-            fs.copy(src, dest)
-        else:
-            # Compress and copy in one step
-            src_name = os.path.basename(src)
-            if os.path.isdir(dest):
-                zipped = os.path.join(dest, f"{src_name}.gz")
-            elif not dest.endswith(".gz"):
-                zipped = f"{dest}.gz"
-            else:
-                zipped = dest
-
-            with open(src, "rb") as fin, gzip.open(zipped, "wb") as fout:
-                shutil.copyfileobj(fin, fout)
-
-
-def copy_files_to_artifacts(
-    src: str, artifacts_dir: str, *, compress_artifacts: bool = False
-) -> None:
+def copy_files_to_artifacts(src, artifacts_dir):
     """
     Copy file(s) to the given artifacts directory
 
-    Args:
+    Parameters:
         src (str): the glob-friendly path expression for the file(s) to copy
         artifacts_dir (str): the destination directory
-        compress_artifacts (bool): option to compress copied artifacts using Gzip
     """
     try:
-
-        if compress_artifacts:
-            copy_gzipped(src, artifacts_dir)
-        else:
-            fs.copy(src, artifacts_dir)
+        fs.copy(src, artifacts_dir)
     except Exception as err:
-        tty.warn(
-            (
-                f"Unable to copy files ({src}) to artifacts {artifacts_dir} due to "
-                f"exception: {str(err)}"
-            )
+        msg = (
+            f"Unable to copy files ({src}) to artifacts {artifacts_dir} due to "
+            f"exception: {str(err)}"
         )
+        tty.warn(msg)
 
 
 def win_quote(quote_str: str) -> str:

lib/spack/spack/cmd/__init__.py

@@ -330,7 +330,7 @@ def ensure_single_spec_or_die(spec, matching_specs):
     if len(matching_specs) <= 1:
         return
 
-    format_string = "{name}{@version}{ arch=architecture} {%compiler.name}{@compiler.version}"
+    format_string = "{name}{@version}{%compiler.name}{@compiler.version}{ arch=architecture}"
     args = ["%s matches multiple packages." % spec, "Matching packages:"]
     args += [
         colorize("  @K{%s} " % s.dag_hash(7)) + s.cformat(format_string) for s in matching_specs
@@ -436,7 +436,7 @@ def display_specs(specs, args=None, **kwargs):
         all_headers (bool): show headers even when arch/compiler aren't defined
         status_fn (typing.Callable): if provided, prepend install-status info
         output (typing.IO): A file object to write to. Default is ``sys.stdout``
-        specfile_format (bool): specfile format of the current spec
+
     """
 
     def get_arg(name, default=None):
@@ -458,7 +458,6 @@ def get_arg(name, default=None):
     all_headers = get_arg("all_headers", False)
     output = get_arg("output", sys.stdout)
     status_fn = get_arg("status_fn", None)
-    specfile_format = get_arg("specfile_format", False)
 
     decorator = get_arg("decorator", None)
     if decorator is None:
@@ -478,10 +477,7 @@ def get_arg(name, default=None):
         if flags:
             ffmt += " {compiler_flags}"
         vfmt = "{variants}" if variants else ""
-        format_string = nfmt + "{@version}" + vfmt + ffmt
-
-    if specfile_format:
-        format_string = "[{specfile_version}] " + format_string
+        format_string = nfmt + "{@version}" + ffmt + vfmt
 
     def fmt(s, depth=0):
         """Formatter function for all output specs"""

lib/spack/spack/cmd/buildcache.py

@@ -76,6 +76,9 @@ def setup_parser(subparser: argparse.ArgumentParser):
         default=False,
         help="regenerate buildcache index after building package(s)",
     )
+    push.add_argument(
+        "--spec-file", default=None, help="create buildcache entry for spec from json or yaml file"
+    )
     push.add_argument(
         "--only",
         default="package,dependencies",
@@ -189,14 +192,28 @@ def setup_parser(subparser: argparse.ArgumentParser):
         default=lambda: spack.config.default_modify_scope(),
         help="configuration scope containing mirrors to check",
     )
-
+    # Unfortunately there are 3 ways to do the same thing here:
+    check_specs = check.add_mutually_exclusive_group()
+    check_specs.add_argument(
+        "-s", "--spec", help="check single spec instead of release specs file"
+    )
+    check_specs.add_argument(
+        "--spec-file",
+        help="check single spec from json or yaml file instead of release specs file",
+    )
     arguments.add_common_arguments(check, ["specs"])
 
     check.set_defaults(func=check_fn)
 
     # Download tarball and specfile
     download = subparsers.add_parser("download", help=download_fn.__doc__)
-    download.add_argument("-s", "--spec", help="download built tarball for spec from mirror")
+    download_spec_or_specfile = download.add_mutually_exclusive_group(required=True)
+    download_spec_or_specfile.add_argument(
+        "-s", "--spec", help="download built tarball for spec from mirror"
+    )
+    download_spec_or_specfile.add_argument(
+        "--spec-file", help="download built tarball for spec (from json or yaml file) from mirror"
+    )
     download.add_argument(
         "-p",
         "--path",
@@ -206,10 +223,28 @@ def setup_parser(subparser: argparse.ArgumentParser):
     )
     download.set_defaults(func=download_fn)
 
+    # Get buildcache name
+    getbuildcachename = subparsers.add_parser(
+        "get-buildcache-name", help=get_buildcache_name_fn.__doc__
+    )
+    getbuildcachename_spec_or_specfile = getbuildcachename.add_mutually_exclusive_group(
+        required=True
+    )
+    getbuildcachename_spec_or_specfile.add_argument(
+        "-s", "--spec", help="spec string for which buildcache name is desired"
+    )
+    getbuildcachename_spec_or_specfile.add_argument(
+        "--spec-file", help="path to spec json or yaml file for which buildcache name is desired"
+    )
+    getbuildcachename.set_defaults(func=get_buildcache_name_fn)
+
     # Given the root spec, save the yaml of the dependent spec to a file
     savespecfile = subparsers.add_parser("save-specfile", help=save_specfile_fn.__doc__)
     savespecfile_spec_or_specfile = savespecfile.add_mutually_exclusive_group(required=True)
     savespecfile_spec_or_specfile.add_argument("--root-spec", help="root spec of dependent spec")
+    savespecfile_spec_or_specfile.add_argument(
+        "--root-specfile", help="path to json or yaml file containing root spec of dependent spec"
+    )
     savespecfile.add_argument(
         "-s",
         "--specs",
@@ -345,8 +380,14 @@ def _specs_to_be_packaged(
 
 def push_fn(args):
     """create a binary package and push it to a mirror"""
-    if args.specs:
-        roots = _matching_specs(spack.cmd.parse_specs(args.specs))
+    if args.spec_file:
+        tty.warn(
+            "The flag `--spec-file` is deprecated and will be removed in Spack 0.22. "
+            "Use positional arguments instead."
+        )
+
+    if args.specs or args.spec_file:
+        roots = _matching_specs(spack.cmd.parse_specs(args.specs or args.spec_file))
     else:
         roots = spack.cmd.require_active_env(cmd_name="buildcache push").concrete_roots()
 
@@ -488,7 +529,22 @@ def check_fn(args: argparse.Namespace):
     this command uses the process exit code to indicate its result, specifically, if the
     exit code is non-zero, then at least one of the indicated specs needs to be rebuilt
     """
-    specs_arg = args.specs
+    if args.spec_file:
+        specs_arg = (
+            args.spec_file if os.path.sep in args.spec_file else os.path.join(".", args.spec_file)
+        )
+        tty.warn(
+            "The flag `--spec-file` is deprecated and will be removed in Spack 0.22. "
+            f"Use `spack buildcache check {specs_arg}` instead."
+        )
+    elif args.spec:
+        specs_arg = args.spec
+        tty.warn(
+            "The flag `--spec` is deprecated and will be removed in Spack 0.23. "
+            f"Use `spack buildcache check {specs_arg}` instead."
+        )
+    else:
+        specs_arg = args.specs
 
     if specs_arg:
         specs = _matching_specs(spack.cmd.parse_specs(specs_arg))
@@ -522,7 +578,13 @@ def download_fn(args):
     code indicates that the command failed to download at least one of the required buildcache
     components
     """
-    specs = _matching_specs(spack.cmd.parse_specs(args.spec))
+    if args.spec_file:
+        tty.warn(
+            "The flag `--spec-file` is deprecated and will be removed in Spack 0.22. "
+            "Use --spec instead."
+        )
+
+    specs = _matching_specs(spack.cmd.parse_specs(args.spec or args.spec_file))
 
     if len(specs) != 1:
         tty.die("a single spec argument is required to download from a buildcache")
@@ -531,6 +593,15 @@ def download_fn(args):
         sys.exit(1)
 
 
+def get_buildcache_name_fn(args):
+    """get name (prefix) of buildcache entries for this spec"""
+    tty.warn("This command is deprecated and will be removed in Spack 0.22.")
+    specs = _matching_specs(spack.cmd.parse_specs(args.spec or args.spec_file))
+    if len(specs) != 1:
+        tty.die("a single spec argument is required to get buildcache name")
+    print(bindist.tarball_name(specs[0], ""))
+
+
 def save_specfile_fn(args):
     """get full spec for dependencies and write them to files in the specified output directory
 
@@ -538,7 +609,13 @@ def save_specfile_fn(args):
     successful. if any errors or exceptions are encountered, or if expected command-line arguments
     are not provided, then the exit code will be non-zero
     """
-    specs = spack.cmd.parse_specs(args.root_spec)
+    if args.root_specfile:
+        tty.warn(
+            "The flag `--root-specfile` is deprecated and will be removed in Spack 0.22. "
+            "Use --root-spec instead."
+        )
+
+    specs = spack.cmd.parse_specs(args.root_spec or args.root_specfile)
 
     if len(specs) != 1:
         tty.die("a single spec argument is required to save specfile")

lib/spack/spack/cmd/ci.py

@@ -5,13 +5,11 @@
 import json
 import os
 import shutil
-import sys
-from typing import Dict
 from urllib.parse import urlparse, urlunparse
 
 import llnl.util.filesystem as fs
+import llnl.util.tty as tty
 import llnl.util.tty.color as clr
-from llnl.util import tty
 
 import spack.binary_distribution as bindist
 import spack.ci as spack_ci
@@ -20,20 +18,12 @@
 import spack.cmd.common.arguments
 import spack.config as cfg
 import spack.environment as ev
-import spack.error
-import spack.fetch_strategy
 import spack.hash_types as ht
 import spack.mirrors.mirror
-import spack.package_base
-import spack.repo
-import spack.spec
-import spack.stage
-import spack.util.executable
 import spack.util.gpg as gpg_util
 import spack.util.timer as timer
 import spack.util.url as url_util
 import spack.util.web as web_util
-import spack.version
 
 description = "manage continuous integration pipelines"
 section = "build"
@@ -160,12 +150,6 @@ def setup_parser(subparser):
         default=False,
         help="stop stand-alone tests after the first failure",
     )
-    rebuild.add_argument(
-        "--timeout",
-        type=int,
-        default=None,
-        help="maximum time (in seconds) that tests are allowed to run",
-    )
     rebuild.set_defaults(func=ci_rebuild)
     spack.cmd.common.arguments.add_common_arguments(rebuild, ["jobs"])
 
@@ -207,16 +191,6 @@ def setup_parser(subparser):
 
     reproduce.set_defaults(func=ci_reproduce)
 
-    # Verify checksums inside of ci workflows
-    verify_versions = subparsers.add_parser(
-        "verify-versions",
-        description=deindent(ci_verify_versions.__doc__),
-        help=spack.cmd.first_line(ci_verify_versions.__doc__),
-    )
-    verify_versions.add_argument("from_ref", help="git ref from which start looking at changes")
-    verify_versions.add_argument("to_ref", help="git ref to end looking at changes")
-    verify_versions.set_defaults(func=ci_verify_versions)
-
 
 def ci_generate(args):
     """generate jobs file from a CI-aware spack file
@@ -490,12 +464,10 @@ def ci_rebuild(args):
                 job_spec.to_dict(hash=ht.dag_hash),
             )
 
-    # Copy logs and archived files from the install metadata (.spack) directory to artifacts now
+    # We generated the "spack install ..." command to "--keep-stage", copy
+    # any logs from the staging directory to artifacts now
     spack_ci.copy_stage_logs_to_artifacts(job_spec, job_log_dir)
 
-    # Clear the stage directory
-    spack.stage.purge()
-
     # If the installation succeeded and we're running stand-alone tests for
     # the package, run them and copy the output. Failures of any kind should
     # *not* terminate the build process or preclude creating the build cache.
@@ -530,7 +502,6 @@ def ci_rebuild(args):
                     fail_fast=args.fail_fast,
                     log_file=log_file,
                     repro_dir=repro_dir,
-                    timeout=args.timeout,
                 )
 
             except Exception as err:
@@ -689,158 +660,6 @@ def _gitlab_artifacts_url(url: str) -> str:
     return urlunparse(parsed._replace(path="/".join(parts), fragment="", query=""))
 
 
-def validate_standard_versions(
-    pkg: spack.package_base.PackageBase, versions: spack.version.VersionList
-) -> bool:
-    """Get and test the checksum of a package version based on a tarball.
-    Args:
-      pkg spack.package_base.PackageBase: Spack package for which to validate a version checksum
-      versions spack.version.VersionList: list of package versions to validate
-    Returns: bool: result of the validation. True is valid and false is failed.
-    """
-    url_dict: Dict[spack.version.StandardVersion, str] = {}
-
-    for version in versions:
-        url = pkg.find_valid_url_for_version(version)
-        url_dict[version] = url
-
-    version_hashes = spack.stage.get_checksums_for_versions(
-        url_dict, pkg.name, fetch_options=pkg.fetch_options
-    )
-
-    valid_checksums = True
-    for version, sha in version_hashes.items():
-        if sha != pkg.versions[version]["sha256"]:
-            tty.error(
-                f"Invalid checksum found {pkg.name}@{version}\n"
-                f"    [package.py] {pkg.versions[version]['sha256']}\n"
-                f"    [Downloaded] {sha}"
-            )
-            valid_checksums = False
-            continue
-
-        tty.info(f"Validated {pkg.name}@{version} --> {sha}")
-
-    return valid_checksums
-
-
-def validate_git_versions(
-    pkg: spack.package_base.PackageBase, versions: spack.version.VersionList
-) -> bool:
-    """Get and test the commit and tag of a package version based on a git repository.
-    Args:
-      pkg spack.package_base.PackageBase: Spack package for which to validate a version
-      versions spack.version.VersionList: list of package versions to validate
-    Returns: bool: result of the validation. True is valid and false is failed.
-    """
-    valid_commit = True
-    for version in versions:
-        fetcher = spack.fetch_strategy.for_package_version(pkg, version)
-        with spack.stage.Stage(fetcher) as stage:
-            known_commit = pkg.versions[version]["commit"]
-            try:
-                stage.fetch()
-            except spack.error.FetchError:
-                tty.error(
-                    f"Invalid commit for {pkg.name}@{version}\n"
-                    f"    {known_commit} could not be checked out in the git repository."
-                )
-                valid_commit = False
-                continue
-
-            # Test if the specified tag matches the commit in the package.py
-            # We retrieve the commit associated with a tag and compare it to the
-            # commit that is located in the package.py file.
-            if "tag" in pkg.versions[version]:
-                tag = pkg.versions[version]["tag"]
-                try:
-                    with fs.working_dir(stage.source_path):
-                        found_commit = fetcher.git(
-                            "rev-list", "-n", "1", tag, output=str, error=str
-                        ).strip()
-                except spack.util.executable.ProcessError:
-                    tty.error(
-                        f"Invalid tag for {pkg.name}@{version}\n"
-                        f"    {tag} could not be found in the git repository."
-                    )
-                    valid_commit = False
-                    continue
-
-                if found_commit != known_commit:
-                    tty.error(
-                        f"Mismatched tag <-> commit found for {pkg.name}@{version}\n"
-                        f"    [package.py] {known_commit}\n"
-                        f"    [Downloaded] {found_commit}"
-                    )
-                    valid_commit = False
-                    continue
-
-            # If we have downloaded the repository, found the commit, and compared
-            # the tag (if specified) we can conclude that the version is pointing
-            # at what we would expect.
-            tty.info(f"Validated {pkg.name}@{version} --> {known_commit}")
-
-    return valid_commit
-
-
-def ci_verify_versions(args):
-    """validate version checksum & commits between git refs
-    This command takes a from_ref and to_ref arguments and
-    then parses the git diff between the two to determine which packages
-    have been modified verifies the new checksums inside of them.
-    """
-    # Get a list of all packages that have been changed or added
-    # between from_ref and to_ref
-    pkgs = spack.repo.get_all_package_diffs(
-        "AC", spack.repo.builtin_repo(), args.from_ref, args.to_ref
-    )
-
-    failed_version = False
-    for pkg_name in pkgs:
-        spec = spack.spec.Spec(pkg_name)
-        pkg = spack.repo.PATH.get_pkg_class(spec.name)(spec)
-        path = spack.repo.PATH.package_path(pkg_name)
-
-        # Skip checking manual download packages and trust the maintainers
-        if pkg.manual_download:
-            tty.warn(f"Skipping manual download package: {pkg_name}")
-            continue
-
-        # Store versions checksums / commits for future loop
-        checksums_version_dict = {}
-        commits_version_dict = {}
-        for version in pkg.versions:
-            # If the package version defines a sha256 we'll use that as the high entropy
-            # string to detect which versions have been added between from_ref and to_ref
-            if "sha256" in pkg.versions[version]:
-                checksums_version_dict[pkg.versions[version]["sha256"]] = version
-
-            # If a package version instead defines a commit we'll use that as a
-            # high entropy string to detect new versions.
-            elif "commit" in pkg.versions[version]:
-                commits_version_dict[pkg.versions[version]["commit"]] = version
-
-            # TODO: enforce every version have a commit or a sha256 defined if not
-            # an infinite version (there are a lot of package's where this doesn't work yet.)
-
-        with fs.working_dir(os.path.dirname(path)):
-            added_checksums = spack_ci.get_added_versions(
-                checksums_version_dict, path, from_ref=args.from_ref, to_ref=args.to_ref
-            )
-            added_commits = spack_ci.get_added_versions(
-                commits_version_dict, path, from_ref=args.from_ref, to_ref=args.to_ref
-            )
-
-        if added_checksums:
-            failed_version = not validate_standard_versions(pkg, added_checksums) or failed_version
-
-        if added_commits:
-            failed_version = not validate_git_versions(pkg, added_commits) or failed_version
-
-    if failed_version:
-        sys.exit(1)
-
-
 def ci(parser, args):
     if args.func:
         return args.func(args)

lib/spack/spack/cmd/compiler.py

@@ -63,7 +63,7 @@ def setup_parser(subparser):
     )
 
     # List
-    list_parser = sp.add_parser("list", aliases=["ls"], help="list available compilers")
+    list_parser = sp.add_parser("list", help="list available compilers")
     list_parser.add_argument(
         "--scope", action=arguments.ConfigScope, help="configuration scope to read from"
     )
@@ -216,6 +216,5 @@ def compiler(parser, args):
         "rm": compiler_remove,
         "info": compiler_info,
         "list": compiler_list,
-        "ls": compiler_list,
     }
     action[args.compiler_command](args)

lib/spack/spack/cmd/config.py

@@ -350,12 +350,9 @@ def _config_change(config_path, match_spec_str=None):
                 if spack.config.get(key_path, scope=scope):
                     ideal_scope_to_modify = scope
                     break
-            # If we find our key in a specific scope, that's the one we want
-            # to modify. Otherwise we use the default write scope.
-            write_scope = ideal_scope_to_modify or spack.config.default_modify_scope()
 
             update_path = f"{key_path}:[{str(spec)}]"
-            spack.config.add(update_path, scope=write_scope)
+            spack.config.add(update_path, scope=ideal_scope_to_modify)
     else:
         raise ValueError("'config change' can currently only change 'require' sections")
 

lib/spack/spack/cmd/create.py

@@ -23,7 +23,7 @@
 from spack.util.editor import editor
 from spack.util.executable import which
 from spack.util.format import get_version_lines
-from spack.util.naming import pkg_name_to_class_name, simplify_name
+from spack.util.naming import mod_to_class, simplify_name, valid_fully_qualified_module_name
 
 description = "create a new package file"
 section = "packaging"
@@ -95,7 +95,7 @@ class BundlePackageTemplate:
 
     def __init__(self, name: str, versions, languages: List[str]):
         self.name = name
-        self.class_name = pkg_name_to_class_name(name)
+        self.class_name = mod_to_class(name)
         self.versions = versions
         self.languages = languages
 
@@ -572,7 +572,7 @@ def edit(self, spec, prefix):
 class IntelPackageTemplate(PackageTemplate):
     """Provides appropriate overrides for licensed Intel software"""
 
-    base_class_name = "IntelOneApiPackage"
+    base_class_name = "IntelPackage"
 
     body_def = """\
     # FIXME: Override `setup_environment` if necessary."""
@@ -874,7 +874,7 @@ def get_name(name, url):
 
     result = simplify_name(result)
 
-    if not re.match(r"^[a-z0-9-]+$", result):
+    if not valid_fully_qualified_module_name(result):
         tty.die("Package name can only contain a-z, 0-9, and '-'")
 
     return result

lib/spack/spack/cmd/dependencies.py

@@ -55,7 +55,7 @@ def dependencies(parser, args):
         env = ev.active_environment()
         spec = spack.cmd.disambiguate_spec(specs[0], env)
 
-        format_string = "{name}{@version}{/hash:7}{%compiler}"
+        format_string = "{name}{@version}{%compiler}{/hash:7}"
         if sys.stdout.isatty():
             tty.msg("Dependencies of %s" % spec.format(format_string, color=True))
         deps = spack.store.STORE.db.installed_relatives(

lib/spack/spack/cmd/dependents.py

@@ -93,7 +93,7 @@ def dependents(parser, args):
         env = ev.active_environment()
         spec = spack.cmd.disambiguate_spec(specs[0], env)
 
-        format_string = "{name}{@version}{/hash:7}{%compiler}"
+        format_string = "{name}{@version}{%compiler}{/hash:7}"
         if sys.stdout.isatty():
             tty.msg("Dependents of %s" % spec.cformat(format_string))
         deps = spack.store.STORE.db.installed_relatives(spec, "parents", args.transitive)

lib/spack/spack/cmd/develop.py

@@ -3,13 +3,11 @@
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 import os
 import shutil
-from typing import Optional
 
 import llnl.util.tty as tty
 
 import spack.cmd
 import spack.config
-import spack.environment
 import spack.fetch_strategy
 import spack.repo
 import spack.spec
@@ -33,33 +31,37 @@ def setup_parser(subparser):
         "--no-clone",
         action="store_false",
         dest="clone",
+        default=None,
         help="do not clone, the package already exists at the source path",
     )
     clone_group.add_argument(
         "--clone",
         action="store_true",
         dest="clone",
-        default=True,
-        help=(
-            "(default) clone the package unless the path already exists, "
-            "use --force to overwrite"
-        ),
+        default=None,
+        help="clone the package even if the path already exists",
     )
 
     subparser.add_argument(
         "-f", "--force", help="remove any files or directories that block cloning source code"
     )
 
-    subparser.add_argument(
-        "-r",
-        "--recursive",
-        action="store_true",
-        help="traverse nodes of the graph to mark everything up to the root as a develop spec",
-    )
-
     arguments.add_common_arguments(subparser, ["spec"])
 
 
+def _update_config(spec, path):
+    find_fn = lambda section: spec.name in section
+
+    entry = {"spec": str(spec)}
+    if path != spec.name:
+        entry["path"] = path
+
+    def change_fn(section):
+        section[spec.name] = entry
+
+    spack.config.change_or_add("develop", find_fn, change_fn)
+
+
 def _retrieve_develop_source(spec: spack.spec.Spec, abspath: str) -> None:
     # "steal" the source code via staging API. We ask for a stage
     # to be created, then copy it afterwards somewhere else. It would be
@@ -81,43 +83,44 @@ def _retrieve_develop_source(spec: spack.spec.Spec, abspath: str) -> None:
     package.stage.steal_source(abspath)
 
 
-def assure_concrete_spec(env: spack.environment.Environment, spec: spack.spec.Spec):
-    version = spec.versions.concrete_range_as_version
-    if not version:
-        # first check environment for a matching concrete spec
-        matching_specs = env.all_matching_specs(spec)
-        if matching_specs:
-            version = matching_specs[0].version
-            test_spec = spack.spec.Spec(f"{spec}@{version}")
-            for m_spec in matching_specs:
-                if not m_spec.satisfies(test_spec):
-                    raise SpackError(
-                        f"{spec.name}: has multiple concrete instances in the graph that can't be"
-                        " satisified by a single develop spec. To use `spack develop` ensure one"
-                        " of the following:"
-                        f"\n a) {spec.name} nodes can satisfy the same develop spec (minimally "
-                        "this means they all share the same version)"
-                        f"\n b) Provide a concrete develop spec ({spec.name}@[version]) to clearly"
-                        " indicate what should be developed"
-                    )
-        else:
-            # look up the maximum version so infintiy versions are preferred for develop
-            version = max(spack.repo.PATH.get_pkg_class(spec.fullname).versions.keys())
-            tty.msg(f"Defaulting to highest version: {spec.name}@{version}")
-    spec.versions = spack.version.VersionList([version])
+def develop(parser, args):
+    # Note: we could put develop specs in any scope, but I assume
+    # users would only ever want to do this for either (a) an active
+    # env or (b) a specified config file (e.g. that is included by
+    # an environment)
+    # TODO: when https://github.com/spack/spack/pull/35307 is merged,
+    # an active env is not required if a scope is specified
+    env = spack.cmd.require_active_env(cmd_name="develop")
+    if not args.spec:
+        if args.clone is False:
+            raise SpackError("No spec provided to spack develop command")
 
+        # download all dev specs
+        for name, entry in env.dev_specs.items():
+            path = entry.get("path", name)
+            abspath = spack.util.path.canonicalize_path(path, default_wd=env.path)
 
-def setup_src_code(spec: spack.spec.Spec, src_path: str, clone: bool = True, force: bool = False):
-    """
-    Handle checking, cloning or overwriting source code
-    """
-    assert spec.versions
+            if os.path.exists(abspath):
+                msg = "Skipping developer download of %s" % entry["spec"]
+                msg += " because its path already exists."
+                tty.msg(msg)
+                continue
 
-    if clone:
-        _clone(spec, src_path, force)
+            # Both old syntax `spack develop pkg@x` and new syntax `spack develop pkg@=x`
+            # are currently supported.
+            spec = spack.spec.parse_with_version_concrete(entry["spec"])
+            _retrieve_develop_source(spec, abspath)
 
-    if not clone and not os.path.exists(src_path):
-        raise SpackError(f"Provided path {src_path} does not exist")
+        if not env.dev_specs:
+            tty.warn("No develop specs to download")
+
+        return
+
+    specs = spack.cmd.parse_specs(args.spec)
+    if len(specs) > 1:
+        raise SpackError("spack develop requires at most one named spec")
+
+    spec = specs[0]
 
     version = spec.versions.concrete_range_as_version
     if not version:
@@ -126,114 +129,40 @@ def setup_src_code(spec: spack.spec.Spec, src_path: str, clone: bool = True, for
         tty.msg(f"Defaulting to highest version: {spec.name}@{version}")
     spec.versions = spack.version.VersionList([version])
 
+    # If user does not specify --path, we choose to create a directory in the
+    # active environment's directory, named after the spec
+    path = args.path or spec.name
+    if not os.path.isabs(path):
+        abspath = spack.util.path.canonicalize_path(path, default_wd=env.path)
+    else:
+        abspath = path
 
-def _update_config(spec, path):
-    find_fn = lambda section: spec.name in section
+    # clone default: only if the path doesn't exist
+    clone = args.clone
+    if clone is None:
+        clone = not os.path.exists(abspath)
 
-    entry = {"spec": str(spec)}
-    if path and path != spec.name:
-        entry["path"] = path
+    if not clone and not os.path.exists(abspath):
+        raise SpackError("Provided path %s does not exist" % abspath)
 
-    def change_fn(section):
-        section[spec.name] = entry
+    if clone:
+        if os.path.exists(abspath):
+            if args.force:
+                shutil.rmtree(abspath)
+            else:
+                msg = "Path %s already exists and cannot be cloned to." % abspath
+                msg += " Use `spack develop -f` to overwrite."
+                raise SpackError(msg)
 
-    spack.config.change_or_add("develop", find_fn, change_fn)
-
-
-def update_env(
-    env: spack.environment.Environment,
-    spec: spack.spec.Spec,
-    specified_path: Optional[str] = None,
-    build_dir: Optional[str] = None,
-):
-    """
-    Update the spack.yaml file with additions or changes from a develop call
-    """
-    tty.debug(f"Updating develop config for {env.name} transactionally")
-
-    if not specified_path:
-        dev_entry = env.dev_specs.get(spec.name)
-        if dev_entry:
-            specified_path = dev_entry.get("path", None)
+        _retrieve_develop_source(spec, abspath)
 
+    tty.debug("Updating develop config for {0} transactionally".format(env.name))
     with env.write_transaction():
-        if build_dir is not None:
+        if args.build_directory is not None:
             spack.config.add(
-                f"packages:{spec.name}:package_attributes:build_directory:{build_dir}",
+                "packages:{}:package_attributes:build_directory:{}".format(
+                    spec.name, args.build_directory
+                ),
                 env.scope_name,
             )
-        # add develop spec and update path
-        _update_config(spec, specified_path)
-
-
-def _clone(spec: spack.spec.Spec, abspath: str, force: bool = False):
-    if os.path.exists(abspath):
-        if force:
-            shutil.rmtree(abspath)
-        else:
-            msg = f"Skipping developer download of {spec.name}"
-            msg += f" because its path {abspath} already exists."
-            tty.msg(msg)
-            return
-
-    # cloning can take a while and it's nice to get a message for the longer clones
-    tty.msg(f"Cloning source code for {spec}")
-    _retrieve_develop_source(spec, abspath)
-
-
-def _abs_code_path(
-    env: spack.environment.Environment, spec: spack.spec.Spec, path: Optional[str] = None
-):
-    src_path = path if path else spec.name
-    return spack.util.path.canonicalize_path(src_path, default_wd=env.path)
-
-
-def _dev_spec_generator(args, env):
-    """
-    Generator function to loop over all the develop specs based on how the command is called
-    If no specs are supplied then loop over the develop specs listed in the environment.
-    """
-    if not args.spec:
-        if args.clone is False:
-            raise SpackError("No spec provided to spack develop command")
-
-        for name, entry in env.dev_specs.items():
-            path = entry.get("path", name)
-            abspath = spack.util.path.canonicalize_path(path, default_wd=env.path)
-            # Both old syntax `spack develop pkg@x` and new syntax `spack develop pkg@=x`
-            # are currently supported.
-            spec = spack.spec.parse_with_version_concrete(entry["spec"])
-            yield spec, abspath
-    else:
-        specs = spack.cmd.parse_specs(args.spec)
-        if (args.path or args.build_directory) and len(specs) > 1:
-            raise SpackError(
-                "spack develop requires at most one named spec when using the --path or"
-                " --build-directory arguments"
-            )
-
-        for spec in specs:
-            if args.recursive:
-                concrete_specs = env.all_matching_specs(spec)
-                if not concrete_specs:
-                    tty.warn(
-                        f"{spec.name} has no matching concrete specs in the environment and "
-                        "will be skipped. `spack develop --recursive` requires a concretized"
-                        " environment"
-                    )
-                else:
-                    for s in concrete_specs:
-                        for node_spec in s.traverse(direction="parents", root=True):
-                            tty.debug(f"Recursive develop for {node_spec.name}")
-                            yield node_spec, _abs_code_path(env, node_spec, args.path)
-            else:
-                yield spec, _abs_code_path(env, spec, args.path)
-
-
-def develop(parser, args):
-    env = spack.cmd.require_active_env(cmd_name="develop")
-
-    for spec, abspath in _dev_spec_generator(args, env):
-        assure_concrete_spec(env, spec)
-        setup_src_code(spec, abspath, clone=args.clone, force=args.force)
-        update_env(env, spec, args.path, args.build_directory)
+        _update_config(spec, path)

lib/spack/spack/cmd/external.py

@@ -62,7 +62,7 @@ def setup_parser(subparser):
         "package Spack knows how to find."
     )
 
-    sp.add_parser("list", aliases=["ls"], help="list detectable packages, by repository and name")
+    sp.add_parser("list", help="list detectable packages, by repository and name")
 
     read_cray_manifest = sp.add_parser(
         "read-cray-manifest",
@@ -259,7 +259,6 @@ def external(parser, args):
     action = {
         "find": external_find,
         "list": external_list,
-        "ls": external_list,
         "read-cray-manifest": external_read_cray_manifest,
     }
     action[args.external_command](args)

lib/spack/spack/cmd/find.py

@@ -51,12 +51,6 @@ def setup_parser(subparser):
         "-I", "--install-status", action="store_true", help="show install status of packages"
     )
 
-    subparser.add_argument(
-        "--specfile-format",
-        action="store_true",
-        help="show the specfile format for installed deps ",
-    )
-
     subparser.add_argument(
         "-d", "--deps", action="store_true", help="output dependencies along with found specs"
     )
@@ -286,7 +280,6 @@ def root_decorator(spec, string):
             show_flags=True,
             decorator=root_decorator,
             variants=True,
-            specfile_format=args.specfile_format,
         )
 
     print()
@@ -308,7 +301,6 @@ def root_decorator(spec, string):
             namespace=True,
             show_flags=True,
             variants=True,
-            specfile_format=args.specfile_format,
         )
         print()
 
@@ -398,12 +390,7 @@ def find(parser, args):
             if args.show_concretized:
                 display_results += concretized_but_not_installed
             cmd.display_specs(
-                display_results,
-                args,
-                decorator=decorator,
-                all_headers=True,
-                status_fn=status_fn,
-                specfile_format=args.specfile_format,
+                display_results, args, decorator=decorator, all_headers=True, status_fn=status_fn
             )
 
         # print number of installed packages last (as the list may be long)

lib/spack/spack/cmd/help.py

@@ -73,7 +73,7 @@
       boxlib @B{dim=2}                  boxlib built for 2 dimensions
       libdwarf @g{%intel} ^libelf@g{%gcc}
           libdwarf, built with intel compiler, linked to libelf built with gcc
-      mvapich2 @B{fabrics=psm,mrail,sock} @g{%gcc}
+      mvapich2 @g{%gcc} @B{fabrics=psm,mrail,sock}
           mvapich2, built with gcc compiler, with support for multiple fabrics
 """
 

lib/spack/spack/cmd/list.py

@@ -10,13 +10,11 @@
 import re
 import sys
 from html import escape
-from typing import Type
 
 import llnl.util.tty as tty
 from llnl.util.tty.colify import colify
 
 import spack.deptypes as dt
-import spack.package_base
 import spack.repo
 from spack.cmd.common import arguments
 from spack.version import VersionList
@@ -141,10 +139,10 @@ def name_only(pkgs, out):
         tty.msg("%d packages" % len(pkgs))
 
 
-def github_url(pkg: Type[spack.package_base.PackageBase]) -> str:
+def github_url(pkg):
     """Link to a package file on github."""
-    mod_path = pkg.__module__.replace(".", "/")
-    return f"https://github.com/spack/spack/blob/develop/var/spack/{mod_path}.py"
+    url = "https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/{0}/package.py"
+    return url.format(pkg.name)
 
 
 def rows_for_ncols(elts, ncols):

lib/spack/spack/cmd/modules/__init__.py

@@ -383,10 +383,8 @@ def modules_cmd(parser, args, module_type, callbacks=callbacks):
         query = " ".join(str(s) for s in args.constraint_specs)
         msg = f"the constraint '{query}' matches multiple packages:\n"
         for s in specs:
-            spec_fmt = (
-                "{hash:7} {name}{@version}{compiler_flags}{variants}"
-                "{arch=architecture} {%compiler}"
-            )
+            spec_fmt = "{hash:7} {name}{@version}{%compiler}"
+            spec_fmt += "{compiler_flags}{variants}{arch=architecture}"
             msg += "\t" + s.cformat(spec_fmt) + "\n"
         tty.die(msg, "In this context exactly *one* match is needed.")
 

lib/spack/spack/cmd/pkg.py

@@ -89,17 +89,17 @@ def setup_parser(subparser):
 
 def pkg_add(args):
     """add a package to the git stage with `git add`"""
-    spack.repo.add_package_to_git_stage(args.packages, spack.repo.builtin_repo())
+    spack.repo.add_package_to_git_stage(args.packages)
 
 
 def pkg_list(args):
     """list packages associated with a particular spack git revision"""
-    colify(spack.repo.list_packages(args.rev, spack.repo.builtin_repo()))
+    colify(spack.repo.list_packages(args.rev))
 
 
 def pkg_diff(args):
     """compare packages available in two different git revisions"""
-    u1, u2 = spack.repo.diff_packages(args.rev1, args.rev2, spack.repo.builtin_repo())
+    u1, u2 = spack.repo.diff_packages(args.rev1, args.rev2)
 
     if u1:
         print("%s:" % args.rev1)
@@ -114,23 +114,21 @@ def pkg_diff(args):
 
 def pkg_removed(args):
     """show packages removed since a commit"""
-    u1, u2 = spack.repo.diff_packages(args.rev1, args.rev2, spack.repo.builtin_repo())
+    u1, u2 = spack.repo.diff_packages(args.rev1, args.rev2)
     if u1:
         colify(sorted(u1))
 
 
 def pkg_added(args):
     """show packages added since a commit"""
-    u1, u2 = spack.repo.diff_packages(args.rev1, args.rev2, spack.repo.builtin_repo())
+    u1, u2 = spack.repo.diff_packages(args.rev1, args.rev2)
     if u2:
         colify(sorted(u2))
 
 
 def pkg_changed(args):
     """show packages changed since a commit"""
-    packages = spack.repo.get_all_package_diffs(
-        args.type, spack.repo.builtin_repo(), args.rev1, args.rev2
-    )
+    packages = spack.repo.get_all_package_diffs(args.type, args.rev1, args.rev2)
 
     if packages:
         colify(sorted(packages))

lib/spack/spack/cmd/reindex.py

@@ -1,12 +1,7 @@
 # Copyright Spack Project Developers. See COPYRIGHT file for details.
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
-import os
-import shutil
 
-from llnl.util import tty
-
-import spack.database
 import spack.store
 
 description = "rebuild Spack's package database"
@@ -15,11 +10,4 @@
 
 
 def reindex(parser, args):
-    current_index = spack.store.STORE.db._index_path
-    if os.path.isfile(current_index):
-        backup = f"{current_index}.bkp"
-        shutil.copy(current_index, backup)
-        tty.msg(f"Created a back-up copy of the DB at {backup}")
-
     spack.store.STORE.reindex()
-    tty.msg(f"The DB at {current_index} has been reindex to v{spack.database._DB_VERSION}")

lib/spack/spack/cmd/repo.py

@@ -4,7 +4,6 @@
 
 import os
 import sys
-from typing import List
 
 import llnl.util.tty as tty
 
@@ -25,7 +24,9 @@ def setup_parser(subparser):
     create_parser = sp.add_parser("create", help=repo_create.__doc__)
     create_parser.add_argument("directory", help="directory to create the repo in")
     create_parser.add_argument(
-        "namespace", help="name or namespace to identify packages in the repository"
+        "namespace",
+        help="namespace to identify packages in the repository (defaults to the directory name)",
+        nargs="?",
     )
     create_parser.add_argument(
         "-d",
@@ -137,7 +138,7 @@ def repo_remove(args):
 def repo_list(args):
     """show registered repositories and their namespaces"""
     roots = spack.config.get("repos", scope=args.scope)
-    repos: List[spack.repo.Repo] = []
+    repos = []
     for r in roots:
         try:
             repos.append(spack.repo.from_path(r))
@@ -145,14 +146,17 @@ def repo_list(args):
             continue
 
     if sys.stdout.isatty():
-        tty.msg(f"{len(repos)} package repositor" + ("y." if len(repos) == 1 else "ies."))
+        msg = "%d package repositor" % len(repos)
+        msg += "y." if len(repos) == 1 else "ies."
+        tty.msg(msg)
 
     if not repos:
         return
 
     max_ns_len = max(len(r.namespace) for r in repos)
     for repo in repos:
-        print(f"{repo.namespace:<{max_ns_len + 4}}{repo.package_api_str:<8}{repo.root}")
+        fmt = "%%-%ds%%s" % (max_ns_len + 4)
+        print(fmt % (repo.namespace, repo.root))
 
 
 def repo(parser, args):

lib/spack/spack/cmd/solve.py

@@ -136,7 +136,20 @@ def solve(parser, args):
     setup_only = set(show) == {"asp"}
     unify = spack.config.get("concretizer:unify")
     allow_deprecated = spack.config.get("config:deprecated", False)
-    if unify == "when_possible":
+    if unify != "when_possible":
+        # set up solver parameters
+        # Note: reuse and other concretizer prefs are passed as configuration
+        result = solver.solve(
+            specs,
+            out=output,
+            timers=args.timers,
+            stats=args.stats,
+            setup_only=setup_only,
+            allow_deprecated=allow_deprecated,
+        )
+        if not setup_only:
+            _process_result(result, show, required_format, kwargs)
+    else:
         for idx, result in enumerate(
             solver.solve_in_rounds(
                 specs,
@@ -153,29 +166,3 @@ def solve(parser, args):
                 print("% END ROUND {0}\n".format(idx))
             if not setup_only:
                 _process_result(result, show, required_format, kwargs)
-    elif unify:
-        # set up solver parameters
-        # Note: reuse and other concretizer prefs are passed as configuration
-        result = solver.solve(
-            specs,
-            out=output,
-            timers=args.timers,
-            stats=args.stats,
-            setup_only=setup_only,
-            allow_deprecated=allow_deprecated,
-        )
-        if not setup_only:
-            _process_result(result, show, required_format, kwargs)
-    else:
-        for spec in specs:
-            tty.msg("SOLVING SPEC:", spec)
-            result = solver.solve(
-                [spec],
-                out=output,
-                timers=args.timers,
-                stats=args.stats,
-                setup_only=setup_only,
-                allow_deprecated=allow_deprecated,
-            )
-            if not setup_only:
-                _process_result(result, show, required_format, kwargs)

lib/spack/spack/cmd/style.py

@@ -6,9 +6,8 @@
 import os
 import re
 import sys
-import warnings
 from itertools import islice, zip_longest
-from typing import Callable, Dict, List, Optional
+from typing import Dict, List, Optional
 
 import llnl.util.tty as tty
 import llnl.util.tty.color as color
@@ -17,9 +16,6 @@
 import spack.paths
 import spack.repo
 import spack.util.git
-import spack.util.spack_yaml
-from spack.spec_parser import SPEC_TOKENIZER, SpecTokens
-from spack.tokenize import Token
 from spack.util.executable import Executable, which
 
 description = "runs source code style checks on spack"
@@ -59,7 +55,7 @@ def is_package(f):
     packages, since we allow `from spack import *` and poking globals
     into packages.
     """
-    return f.startswith("var/spack/") and f.endswith("package.py")
+    return f.startswith("var/spack/repos/") and f.endswith("package.py")
 
 
 #: decorator for adding tools to the list
@@ -202,13 +198,6 @@ def setup_parser(subparser):
         action="append",
         help="specify tools to skip (choose from %s)" % ", ".join(tool_names),
     )
-    subparser.add_argument(
-        "--spec-strings",
-        action="store_true",
-        help="upgrade spec strings in Python, JSON and YAML files for compatibility with Spack "
-        "v1.0 and v0.x. Example: spack style --spec-strings $(git ls-files). Note: this flag "
-        "will be removed in Spack v1.0.",
-    )
 
     subparser.add_argument("files", nargs=argparse.REMAINDER, help="specific files to check")
 
@@ -380,7 +369,7 @@ def run_black(black_cmd, file_list, args):
 def _module_part(root: str, expr: str):
     parts = expr.split(".")
     # spack.pkg is for repositories, don't try to resolve it here.
-    if expr.startswith(spack.repo.PKG_MODULE_PREFIX_V1) or expr == "spack.pkg":
+    if ".".join(parts[:2]) == spack.repo.ROOT_PYTHON_NAMESPACE:
         return None
     while parts:
         f1 = os.path.join(root, "lib", "spack", *parts) + ".py"
@@ -518,196 +507,7 @@ def _bootstrap_dev_dependencies():
         spack.bootstrap.ensure_environment_dependencies()
 
 
-IS_PROBABLY_COMPILER = re.compile(r"%[a-zA-Z_][a-zA-Z0-9\-]")
-
-
-def _spec_str_reorder_compiler(idx: int, blocks: List[List[Token]]) -> None:
-    # only move the compiler to the back if it exists and is not already at the end
-    if not 0 <= idx < len(blocks) - 1:
-        return
-    # if there's only whitespace after the compiler, don't move it
-    if all(token.kind == SpecTokens.WS for block in blocks[idx + 1 :] for token in block):
-        return
-    # rotate left and always add at least one WS token between compiler and previous token
-    compiler_block = blocks.pop(idx)
-    if compiler_block[0].kind != SpecTokens.WS:
-        compiler_block.insert(0, Token(SpecTokens.WS, " "))
-    # delete the WS tokens from the new first block if it was at the very start, to prevent leading
-    # WS tokens.
-    while idx == 0 and blocks[0][0].kind == SpecTokens.WS:
-        blocks[0].pop(0)
-    blocks.append(compiler_block)
-
-
-def _spec_str_format(spec_str: str) -> Optional[str]:
-    """Given any string, try to parse as spec string, and rotate the compiler token to the end
-    of each spec instance. Returns the formatted string if it was changed, otherwise None."""
-    # We parse blocks of tokens that include leading whitespace, and move the compiler block to
-    # the end when we hit a dependency ^... or the end of a string.
-    # [@3.1][ +foo][ +bar][ %gcc@3.1][ +baz]
-    # [@3.1][ +foo][ +bar][ +baz][ %gcc@3.1]
-
-    current_block: List[Token] = []
-    blocks: List[List[Token]] = []
-    compiler_block_idx = -1
-    in_edge_attr = False
-
-    for token in SPEC_TOKENIZER.tokenize(spec_str):
-        if token.kind == SpecTokens.UNEXPECTED:
-            # parsing error, we cannot fix this string.
-            return None
-        elif token.kind in (SpecTokens.COMPILER, SpecTokens.COMPILER_AND_VERSION):
-            # multiple compilers are not supported in Spack v0.x, so early return
-            if compiler_block_idx != -1:
-                return None
-            current_block.append(token)
-            blocks.append(current_block)
-            current_block = []
-            compiler_block_idx = len(blocks) - 1
-        elif token.kind in (
-            SpecTokens.START_EDGE_PROPERTIES,
-            SpecTokens.DEPENDENCY,
-            SpecTokens.UNQUALIFIED_PACKAGE_NAME,
-            SpecTokens.FULLY_QUALIFIED_PACKAGE_NAME,
-        ):
-            _spec_str_reorder_compiler(compiler_block_idx, blocks)
-            compiler_block_idx = -1
-            if token.kind == SpecTokens.START_EDGE_PROPERTIES:
-                in_edge_attr = True
-            current_block.append(token)
-            blocks.append(current_block)
-            current_block = []
-        elif token.kind == SpecTokens.END_EDGE_PROPERTIES:
-            in_edge_attr = False
-            current_block.append(token)
-            blocks.append(current_block)
-            current_block = []
-        elif in_edge_attr:
-            current_block.append(token)
-        elif token.kind in (
-            SpecTokens.VERSION_HASH_PAIR,
-            SpecTokens.GIT_VERSION,
-            SpecTokens.VERSION,
-            SpecTokens.PROPAGATED_BOOL_VARIANT,
-            SpecTokens.BOOL_VARIANT,
-            SpecTokens.PROPAGATED_KEY_VALUE_PAIR,
-            SpecTokens.KEY_VALUE_PAIR,
-            SpecTokens.DAG_HASH,
-        ):
-            current_block.append(token)
-            blocks.append(current_block)
-            current_block = []
-        elif token.kind == SpecTokens.WS:
-            current_block.append(token)
-        else:
-            raise ValueError(f"unexpected token {token}")
-
-    if current_block:
-        blocks.append(current_block)
-    _spec_str_reorder_compiler(compiler_block_idx, blocks)
-
-    new_spec_str = "".join(token.value for block in blocks for token in block)
-    return new_spec_str if spec_str != new_spec_str else None
-
-
-SpecStrHandler = Callable[[str, int, int, str, str], None]
-
-
-def _spec_str_default_handler(path: str, line: int, col: int, old: str, new: str):
-    """A SpecStrHandler that prints formatted spec strings and their locations."""
-    print(f"{path}:{line}:{col}: `{old}` -> `{new}`")
-
-
-def _spec_str_fix_handler(path: str, line: int, col: int, old: str, new: str):
-    """A SpecStrHandler that updates formatted spec strings in files."""
-    with open(path, "r", encoding="utf-8") as f:
-        lines = f.readlines()
-    new_line = lines[line - 1].replace(old, new)
-    if new_line == lines[line - 1]:
-        tty.warn(f"{path}:{line}:{col}: could not apply fix: `{old}` -> `{new}`")
-        return
-    lines[line - 1] = new_line
-    print(f"{path}:{line}:{col}: fixed `{old}` -> `{new}`")
-    with open(path, "w", encoding="utf-8") as f:
-        f.writelines(lines)
-
-
-def _spec_str_ast(path: str, tree: ast.AST, handler: SpecStrHandler) -> None:
-    """Walk the AST of a Python file and apply handler to formatted spec strings."""
-    has_constant = sys.version_info >= (3, 8)
-    for node in ast.walk(tree):
-        if has_constant and isinstance(node, ast.Constant) and isinstance(node.value, str):
-            current_str = node.value
-        elif not has_constant and isinstance(node, ast.Str):
-            current_str = node.s
-        else:
-            continue
-        if not IS_PROBABLY_COMPILER.search(current_str):
-            continue
-        new = _spec_str_format(current_str)
-        if new is not None:
-            handler(path, node.lineno, node.col_offset, current_str, new)
-
-
-def _spec_str_json_and_yaml(path: str, data: dict, handler: SpecStrHandler) -> None:
-    """Walk a YAML or JSON data structure and apply handler to formatted spec strings."""
-    queue = [data]
-    seen = set()
-
-    while queue:
-        current = queue.pop(0)
-        if id(current) in seen:
-            continue
-        seen.add(id(current))
-        if isinstance(current, dict):
-            queue.extend(current.values())
-            queue.extend(current.keys())
-        elif isinstance(current, list):
-            queue.extend(current)
-        elif isinstance(current, str) and IS_PROBABLY_COMPILER.search(current):
-            new = _spec_str_format(current)
-            if new is not None:
-                mark = getattr(current, "_start_mark", None)
-                if mark:
-                    line, col = mark.line + 1, mark.column + 1
-                else:
-                    line, col = 0, 0
-                handler(path, line, col, current, new)
-
-
-def _check_spec_strings(
-    paths: List[str], handler: SpecStrHandler = _spec_str_default_handler
-) -> None:
-    """Open Python, JSON and YAML files, and format their string literals that look like spec
-    strings. A handler is called for each formatting, which can be used to print or apply fixes."""
-    for path in paths:
-        is_json_or_yaml = path.endswith(".json") or path.endswith(".yaml") or path.endswith(".yml")
-        is_python = path.endswith(".py")
-        if not is_json_or_yaml and not is_python:
-            continue
-
-        try:
-            with open(path, "r", encoding="utf-8") as f:
-                # skip files that are likely too large to be user code or config
-                if os.fstat(f.fileno()).st_size > 1024 * 1024:
-                    warnings.warn(f"skipping {path}: too large.")
-                    continue
-                if is_json_or_yaml:
-                    _spec_str_json_and_yaml(path, spack.util.spack_yaml.load_config(f), handler)
-                elif is_python:
-                    _spec_str_ast(path, ast.parse(f.read()), handler)
-        except (OSError, spack.util.spack_yaml.SpackYAMLError, SyntaxError, ValueError):
-            warnings.warn(f"skipping {path}")
-            continue
-
-
 def style(parser, args):
-    if args.spec_strings:
-        if not args.files:
-            tty.die("No files provided to check spec strings.")
-        handler = _spec_str_fix_handler if args.fix else _spec_str_default_handler
-        return _check_spec_strings(args.files, handler)
-
     # save initial working directory for relativizing paths later
     args.initial_working_dir = os.getcwd()
 

lib/spack/spack/cmd/test.py

@@ -65,12 +65,6 @@ def setup_parser(subparser):
     run_parser.add_argument(
         "--help-cdash", action="store_true", help="show usage instructions for CDash reporting"
     )
-    run_parser.add_argument(
-        "--timeout",
-        type=int,
-        default=None,
-        help="maximum time (in seconds) that tests are allowed to run",
-    )
 
     cd_group = run_parser.add_mutually_exclusive_group()
     arguments.add_common_arguments(cd_group, ["clean", "dirty"])
@@ -182,7 +176,7 @@ def test_run(args):
     for spec in specs:
         matching = spack.store.STORE.db.query_local(spec, hashes=hashes, explicit=explicit)
         if spec and not matching:
-            tty.warn(f"No {explicit_str}installed packages match spec {spec}")
+            tty.warn("No {0}installed packages match spec {1}".format(explicit_str, spec))
 
             # TODO: Need to write out a log message and/or CDASH Testing
             #   output that package not installed IF continue to process
@@ -198,7 +192,7 @@ def test_run(args):
     # test_stage_dir
     test_suite = spack.install_test.TestSuite(specs_to_test, args.alias)
     test_suite.ensure_stage()
-    tty.msg(f"Spack test {test_suite.name}")
+    tty.msg("Spack test %s" % test_suite.name)
 
     # Set up reporter
     setattr(args, "package", [s.format() for s in test_suite.specs])
@@ -210,7 +204,6 @@ def test_run(args):
             dirty=args.dirty,
             fail_first=args.fail_first,
             externals=args.externals,
-            timeout=args.timeout,
         )
 
 

lib/spack/spack/cmd/unit_test.py

@@ -17,7 +17,6 @@
     pytest = None  # type: ignore
 
 import llnl.util.filesystem
-import llnl.util.tty as tty
 import llnl.util.tty.color as color
 from llnl.util.tty.colify import colify
 
@@ -237,12 +236,6 @@ def unit_test(parser, args, unknown_args):
         pytest_root = spack.extensions.load_extension(args.extension)
 
     if args.numprocesses is not None and args.numprocesses > 1:
-        try:
-            import xdist  # noqa: F401
-        except ImportError:
-            tty.error("parallel unit-test requires pytest-xdist module")
-            return 1
-
         pytest_args.extend(
             [
                 "--dist",

lib/spack/spack/compilers/adaptor.py

@@ -18,10 +18,6 @@ class Languages(enum.Enum):
 
 
 class CompilerAdaptor:
-    """Provides access to compiler attributes via `Package.compiler`. Useful for
-    packages which do not yet access compiler properties via `self.spec[language]`.
-    """
-
     def __init__(
         self, compiled_spec: spack.spec.Spec, compilers: Dict[Languages, spack.spec.Spec]
     ) -> None:
@@ -83,14 +79,6 @@ def implicit_rpaths(self) -> List[str]:
             result.extend(CompilerPropertyDetector(compiler).implicit_rpaths())
         return result
 
-    @property
-    def opt_flags(self) -> List[str]:
-        return next(iter(self.compilers.values())).package.opt_flags
-
-    @property
-    def debug_flags(self) -> List[str]:
-        return next(iter(self.compilers.values())).package.debug_flags
-
     @property
     def openmp_flag(self) -> str:
         return next(iter(self.compilers.values())).package.openmp_flag
@@ -152,7 +140,7 @@ def c17_flag(self) -> str:
     @property
     def c23_flag(self) -> str:
         return self.compilers[Languages.C].package.standard_flag(
-            language=Languages.C.value, standard="23"
+            language=Languages.C.value, standard="17"
         )
 
     @property
@@ -202,10 +190,6 @@ def f77(self):
         self._lang_exists_or_raise("f77", lang=Languages.FORTRAN)
         return self.compilers[Languages.FORTRAN].package.fortran
 
-    @property
-    def stdcxx_libs(self):
-        return self._maybe_return_attribute("stdcxx_libs", lang=Languages.CXX)
-
 
 class DeprecatedCompiler(lang.DeprecatedProperty):
     def __init__(self) -> None:

lib/spack/spack/compilers/config.py

@@ -7,7 +7,6 @@
 import os
 import re
 import sys
-import warnings
 from typing import Any, Dict, List, Optional, Tuple
 
 import archspec.cpu
@@ -26,6 +25,15 @@
 from spack.operating_systems import windows_os
 from spack.util.environment import get_path
 
+package_name_to_compiler_name = {
+    "llvm": "clang",
+    "intel-oneapi-compilers": "oneapi",
+    "llvm-amdgpu": "rocmcc",
+    "intel-oneapi-compilers-classic": "intel",
+    "acfl": "arm",
+}
+
+
 #: Tag used to identify packages providing a compiler
 COMPILER_TAG = "compiler"
 
@@ -338,15 +346,7 @@ def from_legacy_yaml(compiler_dict: Dict[str, Any]) -> List[spack.spec.Spec]:
             pkg_cls = spack.repo.PATH.get_pkg_class(pkg_name)
             pattern = re.compile(r"|".join(finder.search_patterns(pkg=pkg_cls)))
             filtered_paths = [x for x in candidate_paths if pattern.search(os.path.basename(x))]
-            try:
-                detected = finder.detect_specs(pkg=pkg_cls, paths=filtered_paths)
-            except Exception:
-                warnings.warn(
-                    f"[{__name__}] cannot detect {pkg_name} from the "
-                    f"following paths: {', '.join(filtered_paths)}"
-                )
-                continue
-
+            detected = finder.detect_specs(pkg=pkg_cls, paths=filtered_paths)
             for s in detected:
                 for key in ("flags", "environment", "extra_rpaths"):
                     if key in compiler_dict:

lib/spack/spack/compilers/libraries.py

@@ -250,11 +250,7 @@ def implicit_rpaths(self) -> List[str]:
             return []
 
         link_dirs = parse_non_system_link_dirs(output)
-        all_required_libs = list(self.spec.package.implicit_rpath_libs) + [
-            "libc",
-            "libc++",
-            "libstdc++",
-        ]
+        all_required_libs = list(self.spec.package.required_libs) + ["libc", "libc++", "libstdc++"]
         dynamic_linker = self.default_dynamic_linker()
         result = DefaultDynamicLinkerFilter(dynamic_linker)(
             paths_containing_libs(link_dirs, all_required_libs)

lib/spack/spack/config.py

@@ -32,10 +32,9 @@
 import copy
 import functools
 import os
-import os.path
 import re
 import sys
-from typing import Any, Callable, Dict, Generator, List, NamedTuple, Optional, Tuple, Union
+from typing import Any, Callable, Dict, Generator, List, Optional, Tuple, Union
 
 import jsonschema
 
@@ -43,6 +42,7 @@
 
 import spack.error
 import spack.paths
+import spack.platforms
 import spack.schema
 import spack.schema.bootstrap
 import spack.schema.cdash
@@ -54,18 +54,17 @@
 import spack.schema.develop
 import spack.schema.env
 import spack.schema.env_vars
-import spack.schema.include
-import spack.schema.merged
 import spack.schema.mirrors
 import spack.schema.modules
 import spack.schema.packages
 import spack.schema.repos
 import spack.schema.upstreams
 import spack.schema.view
-import spack.util.remote_file_cache as rfc_util
+
+# Hacked yaml for configuration files preserves line numbers.
 import spack.util.spack_yaml as syaml
+import spack.util.web as web_util
 from spack.util.cpus import cpus_available
-from spack.util.spack_yaml import get_mark_from_yaml_data
 
 from .enums import ConfigScopePriority
 
@@ -75,7 +74,6 @@
     "concretizer": spack.schema.concretizer.schema,
     "definitions": spack.schema.definitions.schema,
     "env_vars": spack.schema.env_vars.schema,
-    "include": spack.schema.include.schema,
     "view": spack.schema.view.schema,
     "develop": spack.schema.develop.schema,
     "mirrors": spack.schema.mirrors.schema,
@@ -123,17 +121,6 @@
 #: Type used for raw YAML configuration
 YamlConfigDict = Dict[str, Any]
 
-#: prefix for name of included configuration scopes
-INCLUDE_SCOPE_PREFIX = "include"
-
-#: safeguard for recursive includes -- maximum include depth
-MAX_RECURSIVE_INCLUDES = 100
-
-
-def _include_cache_location():
-    """Location to cache included configuration files."""
-    return os.path.join(spack.paths.user_cache_path, "includes")
-
 
 class ConfigScope:
     def __init__(self, name: str) -> None:
@@ -141,25 +128,6 @@ def __init__(self, name: str) -> None:
         self.writable = False
         self.sections = syaml.syaml_dict()
 
-        #: names of any included scopes
-        self._included_scopes: Optional[List["ConfigScope"]] = None
-
-    @property
-    def included_scopes(self) -> List["ConfigScope"]:
-        """Memoized list of included scopes, in the order they appear in this scope."""
-        if self._included_scopes is None:
-            self._included_scopes = []
-
-            includes = self.get_section("include")
-            if includes:
-                include_paths = [included_path(data) for data in includes["include"]]
-                for path in include_paths:
-                    included_scope = include_path_scope(path)
-                    if included_scope:
-                        self._included_scopes.append(included_scope)
-
-        return self._included_scopes
-
     def get_section_filename(self, section: str) -> str:
         raise NotImplementedError
 
@@ -465,9 +433,7 @@ def highest(self) -> ConfigScope:
         return next(self.scopes.reversed_values())  # type: ignore
 
     @_config_mutator
-    def push_scope(
-        self, scope: ConfigScope, priority: Optional[int] = None, _depth: int = 0
-    ) -> None:
+    def push_scope(self, scope: ConfigScope, priority: Optional[int] = None) -> None:
         """Adds a scope to the Configuration, at a given priority.
 
         If a priority is not given, it is assumed to be the current highest priority.
@@ -476,44 +442,18 @@ def push_scope(
             scope: scope to be added
             priority: priority of the scope
         """
-        # TODO: As a follow on to #48784, change this to create a graph of the
-        # TODO: includes AND ensure properly sorted such that the order included
-        # TODO: at the highest level is reflected in the value of an option that
-        # TODO: is set in multiple included files.
-        # before pushing the scope itself, push any included scopes recursively, at same priority
-        for included_scope in reversed(scope.included_scopes):
-            if _depth + 1 > MAX_RECURSIVE_INCLUDES:  # make sure we're not recursing endlessly
-                mark = ""
-                if hasattr(included_scope, "path") and syaml.marked(included_scope.path):
-                    mark = included_scope.path._start_mark  # type: ignore
-                raise RecursiveIncludeError(
-                    f"Maximum include recursion exceeded in {included_scope.name}", str(mark)
-                )
-
-            # record this inclusion so that remove_scope() can use it
-            self.push_scope(included_scope, priority=priority, _depth=_depth + 1)
-
         tty.debug(f"[CONFIGURATION: PUSH SCOPE]: {str(scope)}, priority={priority}", level=2)
         self.scopes.add(scope.name, value=scope, priority=priority)
 
     @_config_mutator
     def remove_scope(self, scope_name: str) -> Optional[ConfigScope]:
         """Removes a scope by name, and returns it. If the scope does not exist, returns None."""
-
         try:
             scope = self.scopes.remove(scope_name)
-            tty.debug(f"[CONFIGURATION: REMOVE SCOPE]: {str(scope)}", level=2)
+            tty.debug(f"[CONFIGURATION: POP SCOPE]: {str(scope)}", level=2)
         except KeyError as e:
-            tty.debug(f"[CONFIGURATION: REMOVE SCOPE]: {e}", level=2)
+            tty.debug(f"[CONFIGURATION: POP SCOPE]: {e}", level=2)
             return None
-
-        # transitively remove included scopes
-        for included_scope in scope.included_scopes:
-            assert (
-                included_scope.name in self.scopes
-            ), f"Included scope '{included_scope.name}' was never added to configuration!"
-            self.remove_scope(included_scope.name)
-
         return scope
 
     @property
@@ -823,8 +763,6 @@ def _add_platform_scope(
     cfg: Configuration, name: str, path: str, priority: ConfigScopePriority, writable: bool = True
 ) -> None:
     """Add a platform-specific subdirectory for the current platform."""
-    import spack.platforms  # circular dependency
-
     platform = spack.platforms.host().name
     scope = DirectoryConfigScope(
         f"{name}/{platform}", os.path.join(path, platform), writable=writable
@@ -832,75 +770,6 @@ def _add_platform_scope(
     cfg.push_scope(scope, priority=priority)
 
 
-#: Class for the relevance of an optional path conditioned on a limited
-#: python code that evaluates to a boolean and or explicit specification
-#: as optional.
-class IncludePath(NamedTuple):
-    path: str
-    when: str
-    sha256: str
-    optional: bool
-
-
-def included_path(entry: Union[str, dict]) -> IncludePath:
-    """Convert the included path entry into an IncludePath.
-
-    Args:
-        entry: include configuration entry
-
-    Returns: converted entry, where an empty ``when`` means the path is
-        not conditionally included
-    """
-    if isinstance(entry, str):
-        return IncludePath(path=entry, sha256="", when="", optional=False)
-
-    path = entry["path"]
-    sha256 = entry.get("sha256", "")
-    when = entry.get("when", "")
-    optional = entry.get("optional", False)
-    return IncludePath(path=path, sha256=sha256, when=when, optional=optional)
-
-
-def include_path_scope(include: IncludePath) -> Optional[ConfigScope]:
-    """Instantiate an appropriate configuration scope for the given path.
-
-    Args:
-        include: optional include path
-
-    Returns: configuration scope
-
-    Raises:
-        ValueError: included path has an unsupported URL scheme, is required
-            but does not exist; configuration stage directory argument is missing
-        ConfigFileError: unable to access remote configuration file(s)
-    """
-    # circular dependencies
-    import spack.spec
-
-    if (not include.when) or spack.spec.eval_conditional(include.when):
-        config_path = rfc_util.local_path(include.path, include.sha256, _include_cache_location)
-        if not config_path:
-            raise ConfigFileError(f"Unable to fetch remote configuration from {include.path}")
-
-        if os.path.isdir(config_path):
-            # directories are treated as regular ConfigScopes
-            config_name = f"{INCLUDE_SCOPE_PREFIX}:{os.path.basename(config_path)}"
-            tty.debug(f"Creating DirectoryConfigScope {config_name} for '{config_path}'")
-            return DirectoryConfigScope(config_name, config_path)
-
-        if os.path.exists(config_path):
-            # files are assumed to be SingleFileScopes
-            config_name = f"{INCLUDE_SCOPE_PREFIX}:{config_path}"
-            tty.debug(f"Creating SingleFileScope {config_name} for '{config_path}'")
-            return SingleFileScope(config_name, config_path, spack.schema.merged.schema)
-
-        if not include.optional:
-            path = f" at ({config_path})" if config_path != include.path else ""
-            raise ValueError(f"Required path ({include.path}) does not exist{path}")
-
-    return None
-
-
 def config_paths_from_entry_points() -> List[Tuple[str, str]]:
     """Load configuration paths from entry points
 
@@ -926,7 +795,7 @@ def config_paths_from_entry_points() -> List[Tuple[str, str]]:
     return config_paths
 
 
-def create_incremental() -> Generator[Configuration, None, None]:
+def create() -> Configuration:
     """Singleton Configuration instance.
 
     This constructs one instance associated with this module and returns
@@ -970,25 +839,11 @@ def create_incremental() -> Generator[Configuration, None, None]:
         # Each scope can have per-platform overrides in subdirectories
         _add_platform_scope(cfg, name, path, priority=ConfigScopePriority.CONFIG_FILES)
 
-        # yield the config incrementally so that each config level's init code can get
-        # data from the one below. This can be tricky, but it enables us to have a
-        # single unified config system.
-        #
-        # TODO: think about whether we want to restrict what types of config can be used
-        #     at each level. e.g., we may want to just more forcibly disallow remote
-        #     config (which uses ssl and other config options) for some of the scopes,
-        #     to make the bootstrap issues more explicit, even if allowing config scope
-        #     init to reference lower scopes is more flexible.
-        yield cfg
-
-
-def create() -> Configuration:
-    """Create a configuration using create_incremental(), return the last yielded result."""
-    return list(create_incremental())[-1]
+    return cfg
 
 
 #: This is the singleton configuration instance for Spack.
-CONFIG: Configuration = lang.Singleton(create_incremental)  # type: ignore
+CONFIG: Configuration = lang.Singleton(create)  # type: ignore
 
 
 def add_from_file(filename: str, scope: Optional[str] = None) -> None:
@@ -1084,8 +939,7 @@ def set(path: str, value: Any, scope: Optional[str] = None) -> None:
 
     Accepts the path syntax described in ``get()``.
     """
-    result = CONFIG.set(path, value, scope)
-    return result
+    return CONFIG.set(path, value, scope)
 
 
 def scopes() -> lang.PriorityOrderedMapping[str, ConfigScope]:
@@ -1608,6 +1462,120 @@ def create_from(*scopes_or_paths: Union[ScopeWithOptionalPriority, str]) -> Conf
     return result
 
 
+def raw_github_gitlab_url(url: str) -> str:
+    """Transform a github URL to the raw form to avoid undesirable html.
+
+    Args:
+        url: url to be converted to raw form
+
+    Returns:
+        Raw github/gitlab url or the original url
+    """
+    # Note we rely on GitHub to redirect the 'raw' URL returned here to the
+    # actual URL under https://raw.githubusercontent.com/ with '/blob'
+    # removed and or, '/blame' if needed.
+    if "github" in url or "gitlab" in url:
+        return url.replace("/blob/", "/raw/")
+
+    return url
+
+
+def collect_urls(base_url: str) -> list:
+    """Return a list of configuration URLs.
+
+    Arguments:
+        base_url: URL for a configuration (yaml) file or a directory
+            containing yaml file(s)
+
+    Returns:
+        List of configuration file(s) or empty list if none
+    """
+    if not base_url:
+        return []
+
+    extension = ".yaml"
+
+    if base_url.endswith(extension):
+        return [base_url]
+
+    # Collect configuration URLs if the base_url is a "directory".
+    _, links = web_util.spider(base_url, 0)
+    return [link for link in links if link.endswith(extension)]
+
+
+def fetch_remote_configs(url: str, dest_dir: str, skip_existing: bool = True) -> str:
+    """Retrieve configuration file(s) at the specified URL.
+
+    Arguments:
+        url: URL for a configuration (yaml) file or a directory containing
+            yaml file(s)
+        dest_dir: destination directory
+        skip_existing: Skip files that already exist in dest_dir if
+            ``True``; otherwise, replace those files
+
+    Returns:
+        Path to the corresponding file if URL is or contains a
+        single file and it is the only file in the destination directory or
+        the root (dest_dir) directory if multiple configuration files exist
+        or are retrieved.
+    """
+
+    def _fetch_file(url):
+        raw = raw_github_gitlab_url(url)
+        tty.debug(f"Reading config from url {raw}")
+        return web_util.fetch_url_text(raw, dest_dir=dest_dir)
+
+    if not url:
+        raise ConfigFileError("Cannot retrieve configuration without a URL")
+
+    # Return the local path to the cached configuration file OR to the
+    # directory containing the cached configuration files.
+    config_links = collect_urls(url)
+    existing_files = os.listdir(dest_dir) if os.path.isdir(dest_dir) else []
+
+    paths = []
+    for config_url in config_links:
+        basename = os.path.basename(config_url)
+        if skip_existing and basename in existing_files:
+            tty.warn(
+                f"Will not fetch configuration from {config_url} since a "
+                f"version already exists in {dest_dir}"
+            )
+            path = os.path.join(dest_dir, basename)
+        else:
+            path = _fetch_file(config_url)
+
+        if path:
+            paths.append(path)
+
+    if paths:
+        return dest_dir if len(paths) > 1 else paths[0]
+
+    raise ConfigFileError(f"Cannot retrieve configuration (yaml) from {url}")
+
+
+def get_mark_from_yaml_data(obj):
+    """Try to get ``spack.util.spack_yaml`` mark from YAML data.
+
+    We try the object, and if that fails we try its first member (if it's a container).
+
+    Returns:
+        mark if one is found, otherwise None.
+    """
+    # mark of object itelf
+    mark = getattr(obj, "_start_mark", None)
+    if mark:
+        return mark
+
+    # mark of first member if it is a container
+    if isinstance(obj, (list, dict)):
+        first_member = next(iter(obj), None)
+        if first_member:
+            mark = getattr(first_member, "_start_mark", None)
+
+    return mark
+
+
 def determine_number_of_jobs(
     *,
     parallel: bool = False,
@@ -1712,7 +1680,3 @@ def get_path(path, data):
 
         # give up and return None if nothing worked
         return None
-
-
-class RecursiveIncludeError(spack.error.SpackError):
-    """Too many levels of recursive includes."""

lib/spack/spack/database.py

@@ -149,12 +149,12 @@ def _getfqdn():
     return socket.getfqdn()
 
 
-def reader(version: vn.StandardVersion) -> Type["spack.spec.SpecfileReaderBase"]:
+def reader(version: vn.ConcreteVersion) -> Type["spack.spec.SpecfileReaderBase"]:
     reader_cls = {
-        vn.StandardVersion.from_string("5"): spack.spec.SpecfileV1,
-        vn.StandardVersion.from_string("6"): spack.spec.SpecfileV3,
-        vn.StandardVersion.from_string("7"): spack.spec.SpecfileV4,
-        vn.StandardVersion.from_string("8"): spack.spec.SpecfileV5,
+        vn.Version("5"): spack.spec.SpecfileV1,
+        vn.Version("6"): spack.spec.SpecfileV3,
+        vn.Version("7"): spack.spec.SpecfileV4,
+        vn.Version("8"): spack.spec.SpecfileV5,
     }
     return reader_cls[version]
 
@@ -649,7 +649,7 @@ def __init__(
     @property
     def db_version(self) -> vn.ConcreteVersion:
         if self._db_version is None:
-            raise AttributeError("version not set -- DB has not been read yet")
+            raise AttributeError("db version is not yet set")
         return self._db_version
 
     @db_version.setter
@@ -824,7 +824,7 @@ def check(cond, msg):
         db = fdata["database"]
         check("version" in db, "no 'version' in JSON DB.")
 
-        self.db_version = vn.StandardVersion.from_string(db["version"])
+        self.db_version = vn.Version(db["version"])
         if self.db_version > _DB_VERSION:
             raise InvalidDatabaseVersionError(self, _DB_VERSION, self.db_version)
         elif self.db_version < _DB_VERSION:
@@ -896,7 +896,7 @@ def _handle_current_version_read(self, check, db):
 
     def _handle_old_db_versions_read(self, check, db, *, reindex: bool):
         if reindex is False and not self.is_upstream:
-            self.raise_explicit_database_upgrade_error()
+            self.raise_explicit_database_upgrade()
 
         if not self.is_readable():
             raise DatabaseNotReadableError(
@@ -909,16 +909,13 @@ def is_readable(self) -> bool:
         """Returns true if this DB can be read without reindexing"""
         return (self.db_version, _DB_VERSION) in _REINDEX_NOT_NEEDED_ON_READ
 
-    def raise_explicit_database_upgrade_error(self):
+    def raise_explicit_database_upgrade(self):
         """Raises an ExplicitDatabaseUpgradeError with an appropriate message"""
         raise ExplicitDatabaseUpgradeError(
             f"database is v{self.db_version}, but Spack v{spack.__version__} needs v{_DB_VERSION}",
             long_message=(
-                f"\nChange config:install_tree:root to use a different store, or use `spack "
-                f"reindex` to migrate the store at {self.root} to version {_DB_VERSION}.\n\n"
-                f"If you decide to migrate the store, note that:\n"
-                f"1. The operation cannot be reverted, and\n"
-                f"2. Older Spack versions will not be able to read the store anymore\n"
+                f"\nUse `spack reindex` to upgrade the store at {self.root} to version "
+                f"{_DB_VERSION}, or change config:install_tree:root to use a different store"
             ),
         )
 
@@ -1163,7 +1160,7 @@ def _add(
             installation_time:
                 Date and time of installation
             allow_missing: if True, don't warn when installation is not found on on disk
-                This is useful when installing specs without build/test deps.
+                This is useful when installing specs without build deps.
         """
         if not spec.concrete:
             raise NonConcreteSpecAddError("Specs added to DB must be concrete.")
@@ -1183,8 +1180,10 @@ def _add(
                 edge.spec,
                 explicit=False,
                 installation_time=installation_time,
-                # allow missing build / test only deps
-                allow_missing=allow_missing or edge.depflag & (dt.BUILD | dt.TEST) == edge.depflag,
+                # allow missing build-only deps. This prevents excessive warnings when a spec is
+                # installed, and its build dep is missing a build dep; there's no need to install
+                # the build dep's build dep first, and there's no need to warn about it missing.
+                allow_missing=allow_missing or edge.depflag == dt.BUILD,
             )
 
         # Make sure the directory layout agrees whether the spec is installed

lib/spack/spack/detection/common.py

@@ -20,7 +20,7 @@
 import sys
 from typing import Dict, List, Optional, Set, Tuple, Union
 
-from llnl.util import tty
+import llnl.util.tty
 
 import spack.config
 import spack.error
@@ -93,13 +93,14 @@ def _spec_is_valid(spec: spack.spec.Spec) -> bool:
     except spack.error.SpackError:
         # It is assumed here that we can at least extract the package name from the spec so we
         # can look up the implementation of determine_spec_details
-        tty.warn(f"Constructed spec for {spec.name} does not have a string representation")
+        msg = f"Constructed spec for {spec.name} does not have a string representation"
+        llnl.util.tty.warn(msg)
         return False
 
     try:
         spack.spec.Spec(str(spec))
     except spack.error.SpackError:
-        tty.warn(
+        llnl.util.tty.warn(
             "Constructed spec has a string representation but the string"
             " representation does not evaluate to a valid spec: {0}".format(str(spec))
         )
@@ -108,24 +109,20 @@ def _spec_is_valid(spec: spack.spec.Spec) -> bool:
     return True
 
 
-def path_to_dict(search_paths: List[str]) -> Dict[str, str]:
+def path_to_dict(search_paths: List[str]):
     """Return dictionary[fullpath]: basename from list of paths"""
-    path_to_lib: Dict[str, str] = {}
+    path_to_lib = {}
     # Reverse order of search directories so that a lib in the first
     # entry overrides later entries
     for search_path in reversed(search_paths):
         try:
-            dir_iter = os.scandir(search_path)
+            with os.scandir(search_path) as entries:
+                path_to_lib.update(
+                    {entry.path: entry.name for entry in entries if entry.is_file()}
+                )
         except OSError as e:
-            tty.debug(f"cannot scan '{search_path}' for external software: {e}")
-            continue
-        with dir_iter as entries:
-            for entry in entries:
-                try:
-                    if entry.is_file():
-                        path_to_lib[entry.path] = entry.name
-                except OSError as e:
-                    tty.debug(f"cannot scan '{search_path}' for external software: {e}")
+            msg = f"cannot scan '{search_path}' for external software: {str(e)}"
+            llnl.util.tty.debug(msg)
 
     return path_to_lib
 

lib/spack/spack/detection/path.py

@@ -7,7 +7,6 @@
 import collections
 import concurrent.futures
 import os
-import pathlib
 import re
 import sys
 import traceback
@@ -16,7 +15,6 @@
 
 import llnl.util.filesystem
 import llnl.util.lang
-import llnl.util.symlink
 import llnl.util.tty
 
 import spack.error
@@ -72,21 +70,13 @@ def dedupe_paths(paths: List[str]) -> List[str]:
     """Deduplicate paths based on inode and device number. In case the list contains first a
     symlink and then the directory it points to, the symlink is replaced with the directory path.
     This ensures that we pick for example ``/usr/bin`` over ``/bin`` if the latter is a symlink to
-    the former."""
+    the former`."""
     seen: Dict[Tuple[int, int], str] = {}
-
-    linked_parent_check = lambda x: any(
-        [llnl.util.symlink.islink(str(y)) for y in pathlib.Path(x).parents]
-    )
-
     for path in paths:
         identifier = file_identifier(path)
         if identifier not in seen:
             seen[identifier] = path
-        # we also want to deprioritize paths if they contain a symlink in any parent
-        # (not just the basedir): e.g. oneapi has "latest/bin",
-        # where "latest" is a symlink to 2025.0"
-        elif not (llnl.util.symlink.islink(path) or linked_parent_check(path)):
+        elif not os.path.islink(path):
             seen[identifier] = path
     return list(seen.values())
 

lib/spack/spack/directives.py

@@ -34,13 +34,11 @@ class OpenMpi(Package):
 import collections.abc
 import os
 import re
-import warnings
 from typing import Any, Callable, List, Optional, Tuple, Type, Union
 
 import llnl.util.tty.color
 
 import spack.deptypes as dt
-import spack.error
 import spack.fetch_strategy
 import spack.package_base
 import spack.patch
@@ -459,7 +457,8 @@ def _execute_extends(pkg):
         if dep_spec.name == "python" and not pkg.name == "python-venv":
             _depends_on(pkg, spack.spec.Spec("python-venv"), when=when, type=("build", "run"))
 
-        pkg.extendees[dep_spec.name] = (dep_spec, when_spec)
+        # TODO: the values of the extendees dictionary are not used. Remove in next refactor.
+        pkg.extendees[dep_spec.name] = (dep_spec, None)
 
     return _execute_extends
 
@@ -610,7 +609,7 @@ def _execute_patch(
     return _execute_patch
 
 
-def conditional(*values: Union[str, bool], when: Optional[WhenType] = None):
+def conditional(*values: List[Any], when: Optional[WhenType] = None):
     """Conditional values that can be used in variant declarations."""
     # _make_when_spec returns None when the condition is statically false.
     when = _make_when_spec(when)
@@ -622,7 +621,7 @@ def conditional(*values: Union[str, bool], when: Optional[WhenType] = None):
 @directive("variants")
 def variant(
     name: str,
-    default: Optional[Union[bool, str, Tuple[str, ...]]] = None,
+    default: Optional[Any] = None,
     description: str = "",
     values: Optional[Union[collections.abc.Sequence, Callable[[Any], bool]]] = None,
     multi: Optional[bool] = None,
@@ -652,29 +651,11 @@ def variant(
         DirectiveError: If arguments passed to the directive are invalid
     """
 
-    # This validation can be removed at runtime and enforced with an audit in Spack v1.0.
-    # For now it's a warning to let people migrate faster.
-    if not (
-        default is None
-        or type(default) in (bool, str)
-        or (type(default) is tuple and all(type(x) is str for x in default))
-    ):
-        if isinstance(default, (list, tuple)):
-            did_you_mean = f"default={','.join(str(x) for x in default)!r}"
-        else:
-            did_you_mean = f"default={str(default)!r}"
-        warnings.warn(
-            f"default value for variant '{name}' is not a boolean or string: default={default!r}. "
-            f"Did you mean {did_you_mean}?",
-            stacklevel=3,
-            category=spack.error.SpackAPIWarning,
-        )
-
     def format_error(msg, pkg):
         msg += " @*r{{[{0}, variant '{1}']}}"
         return llnl.util.tty.color.colorize(msg.format(pkg.name, name))
 
-    if name in spack.variant.RESERVED_NAMES:
+    if name in spack.variant.reserved_names:
 
         def _raise_reserved_name(pkg):
             msg = "The name '%s' is reserved by Spack" % name
@@ -685,11 +666,7 @@ def _raise_reserved_name(pkg):
     # Ensure we have a sequence of allowed variant values, or a
     # predicate for it.
     if values is None:
-        if (
-            default in (True, False)
-            or type(default) is str
-            and default.upper() in ("TRUE", "FALSE")
-        ):
+        if str(default).upper() in ("TRUE", "FALSE"):
             values = (True, False)
         else:
             values = lambda x: True
@@ -722,15 +699,12 @@ def _raise_argument_error(pkg):
     # or the empty string, as the former indicates that a default
     # was not set while the latter will make the variant unparsable
     # from the command line
-    if isinstance(default, tuple):
-        default = ",".join(default)
-
     if default is None or default == "":
 
         def _raise_default_not_set(pkg):
             if default is None:
-                msg = "either a default was not explicitly set, or 'None' was used"
-            else:
+                msg = "either a default was not explicitly set, " "or 'None' was used"
+            elif default == "":
                 msg = "the default cannot be an empty string"
             raise DirectiveError(format_error(msg, pkg))