cpython/.github/workflows/build.yml

name: Tests

on:
  workflow_dispatch:
  push:
    branches:
    - 'main'
    - '3.*'
  pull_request:
    branches:
    - 'main'
    - '3.*'

permissions:
  contents: read

concurrency:
  # https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#concurrency
  # 'group' must be a key uniquely representing a PR or push event.
  # github.workflow is the workflow name
  # github.actor is the user invoking the workflow
  # github.head_ref is the source branch of the PR or otherwise blank
  # github.run_id is a unique number for the current run
  group: ${{ github.workflow }}-${{ github.actor }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

env:
  FORCE_COLOR: 1

jobs:
  build-context:
    name: Change detection
    # To use boolean outputs from this job, parse them as JSON.
    # Here's some examples:
    #
    #   if: fromJSON(needs.build-context.outputs.run-docs)
    #
    #   ${{
    #        fromJSON(needs.build-context.outputs.run-tests)
    #        && 'truthy-branch'
    #        || 'falsy-branch'
    #   }}
    #
    uses: ./.github/workflows/reusable-context.yml

  check-docs:
    name: Docs
    needs: build-context
    if: fromJSON(needs.build-context.outputs.run-docs)
    uses: ./.github/workflows/reusable-docs.yml

  check-autoconf-regen:
    name: 'Check if Autoconf files are up to date'
    # Don't use ubuntu-latest but a specific version to make the job
    # reproducible: to get the same tools versions (autoconf, aclocal, ...)
    runs-on: ubuntu-24.04
    container:
      image: ghcr.io/python/autoconf:2025.01.02.12581854023
    timeout-minutes: 60
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    steps:
      - name: Install Git
        run: |
          apt update && apt install git -yq
          git config --global --add safe.directory "$GITHUB_WORKSPACE"
      - uses: actions/checkout@v4
        with:
          fetch-depth: 1
          persist-credentials: false
      - name: Check Autoconf and aclocal versions
        run: |
          grep "Generated by GNU Autoconf 2.72" configure
          grep "aclocal 1.16.5" aclocal.m4
          grep -q "runstatedir" configure
          grep -q "PKG_PROG_PKG_CONFIG" aclocal.m4
      - name: Regenerate autoconf files
        # Same command used by Tools/build/regen-configure.sh ($AUTORECONF)
        run: autoreconf -ivf -Werror
      - name: Check for changes
        run: |
          git add -u
          changes=$(git status --porcelain)
          # Check for changes in regenerated files
          if test -n "$changes"; then
            echo "Generated files not up to date."
            echo "Perhaps you forgot to run make regen-configure ;)"
            echo "configure files must be regenerated with a specific version of autoconf."
            echo "$changes"
            echo ""
            git diff --staged || true
            exit 1
          fi

  check-generated-files:
    name: 'Check if generated files are up to date'
    # Don't use ubuntu-latest but a specific version to make the job
    # reproducible: to get the same tools versions (autoconf, aclocal, ...)
    runs-on: ubuntu-24.04
    timeout-minutes: 60
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    steps:
      - uses: actions/checkout@v4
        with:
          persist-credentials: false
      - uses: actions/setup-python@v5
        with:
          python-version: '3.x'
      - name: Runner image version
        run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
      - name: Restore config.cache
        uses: actions/cache@v4
        with:
          path: config.cache
          # Include env.pythonLocation in key to avoid changes in environment when setup-python updates Python
          key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}-${{ env.pythonLocation }}
      - name: Install dependencies
        run: sudo ./.github/workflows/posix-deps-apt.sh
      - name: Add ccache to PATH
        run: echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
      - name: Configure ccache action
        uses: hendrikmuhs/ccache-action@v1.2
        with:
          save: false
      - name: Configure CPython
        run: |
          # Build Python with the libpython dynamic library
          ./configure --config-cache --with-pydebug --enable-shared
      - name: Build CPython
        run: |
          make -j4 regen-all
          make regen-stdlib-module-names regen-sbom
      - name: Check for changes
        run: |
          git add -u
          changes=$(git status --porcelain)
          # Check for changes in regenerated files
          if test -n "$changes"; then
            echo "Generated files not up to date."
            echo "Perhaps you forgot to run make regen-all or build.bat --regen. ;)"
            echo "configure files must be regenerated with a specific version of autoconf."
            echo "$changes"
            echo ""
            git diff --staged || true
            exit 1
          fi
      - name: Check exported libpython symbols
        run: make smelly
      - name: Check limited ABI symbols
        run: make check-limited-abi
      - name: Check for unsupported C global variables
        if: github.event_name == 'pull_request'  # $GITHUB_EVENT_NAME
        run: make check-c-globals

  build-windows:
    name: >-
      Windows
      ${{ fromJSON(matrix.free-threading) && '(free-threading)' || '' }}
    needs: build-context
    if: fromJSON(needs.build-context.outputs.run-windows-tests)
    strategy:
      fail-fast: false
      matrix:
        arch:
          - x64
          - Win32
          - arm64
        free-threading:
          - false
          - true
        exclude:
          # Skip Win32 on free-threaded builds
          - { arch: Win32, free-threading: true }
    uses: ./.github/workflows/reusable-windows.yml
    with:
      arch: ${{ matrix.arch }}
      free-threading: ${{ matrix.free-threading }}

  build-windows-msi:
    # ${{ '' } is a hack to nest jobs under the same sidebar category.
    name: Windows MSI${{ '' }}  # zizmor: ignore[obfuscation]
    needs: build-context
    if: fromJSON(needs.build-context.outputs.run-windows-msi)
    strategy:
      fail-fast: false
      matrix:
        arch:
        - x86
        - x64
        - arm64
    uses: ./.github/workflows/reusable-windows-msi.yml
    with:
      arch: ${{ matrix.arch }}

  build-macos:
    name: >-
      macOS
      ${{ fromJSON(matrix.free-threading) && '(free-threading)' || '' }}
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    strategy:
      fail-fast: false
      matrix:
        # Cirrus and macos-14 are M1, macos-15-intel is default GHA Intel.
        # macOS 13 only runs tests against the GIL-enabled CPython.
        # Cirrus used for upstream, macos-14 for forks.
        os:
        - ghcr.io/cirruslabs/macos-runner:sonoma
        - macos-14
        - macos-15-intel
        is-fork:  # only used for the exclusion trick
        - ${{ github.repository_owner != 'python' }}
        free-threading:
        - false
        - true
        exclude:
        - os: ghcr.io/cirruslabs/macos-runner:sonoma
          is-fork: true
        - os: macos-14
          is-fork: false
        - os: macos-15-intel
          free-threading: true
    uses: ./.github/workflows/reusable-macos.yml
    with:
      config_hash: ${{ needs.build-context.outputs.config-hash }}
      free-threading: ${{ matrix.free-threading }}
      os: ${{ matrix.os }}

  build-ubuntu:
    name: >-
      Ubuntu
      ${{ fromJSON(matrix.free-threading) && '(free-threading)' || '' }}
      ${{ fromJSON(matrix.bolt) && '(bolt)' || '' }}
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    strategy:
      fail-fast: false
      matrix:
        bolt:
        - false
        - true
        free-threading:
        - false
        - true
        os:
        - ubuntu-24.04
        - ubuntu-24.04-arm
        exclude:
        # Do not test BOLT with free-threading, to conserve resources
        - bolt: true
          free-threading: true
        # BOLT currently crashes during instrumentation on aarch64
        - os: ubuntu-24.04-arm
          bolt: true
    uses: ./.github/workflows/reusable-ubuntu.yml
    with:
      config_hash: ${{ needs.build-context.outputs.config-hash }}
      bolt-optimizations: ${{ matrix.bolt }}
      free-threading: ${{ matrix.free-threading }}
      os: ${{ matrix.os }}

  build-ubuntu-ssltests-openssl:
    name: 'Ubuntu SSL tests with OpenSSL'
    runs-on: ${{ matrix.os }}
    timeout-minutes: 60
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-24.04]
        # Keep 1.1.1w in our list despite it being upstream EOL and otherwise
        # unsupported as it most resembles other 1.1.1-work-a-like ssl APIs
        # supported by important vendors such as AWS-LC.
        openssl_ver: [1.1.1w, 3.0.17, 3.2.5, 3.3.4, 3.4.2, 3.5.2]
        # See Tools/ssl/make_ssl_data.py for notes on adding a new version
    env:
      OPENSSL_VER: ${{ matrix.openssl_ver }}
      MULTISSL_DIR: ${{ github.workspace }}/multissl
      OPENSSL_DIR: ${{ github.workspace }}/multissl/openssl/${{ matrix.openssl_ver }}
      LD_LIBRARY_PATH: ${{ github.workspace }}/multissl/openssl/${{ matrix.openssl_ver }}/lib
    steps:
    - uses: actions/checkout@v4
      with:
        persist-credentials: false
    - name: Runner image version
      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
    - name: Restore config.cache
      uses: actions/cache@v4
      with:
        path: config.cache
        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
    - name: Register gcc problem matcher
      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
    - name: Install dependencies
      run: sudo ./.github/workflows/posix-deps-apt.sh
    - name: Configure OpenSSL env vars
      run: |
        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
    - name: 'Restore OpenSSL build'
      id: cache-openssl
      uses: actions/cache@v4
      with:
        path: ./multissl/openssl/${{ env.OPENSSL_VER }}
        key: ${{ matrix.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
    - name: Install OpenSSL
      if: steps.cache-openssl.outputs.cache-hit != 'true'
      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
    - name: Add ccache to PATH
      run: |
        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
    - name: Configure ccache action
      uses: hendrikmuhs/ccache-action@v1.2
      with:
        save: false
    - name: Configure CPython
      run: ./configure CFLAGS="-fdiagnostics-format=json" --config-cache --enable-slower-safety --with-pydebug --with-openssl="$OPENSSL_DIR"
    - name: Build CPython
      run: make -j4
    - name: Display build info
      run: make pythoninfo
    - name: SSL tests
      run: ./python Lib/test/ssltests.py

  build-ubuntu-ssltests-awslc:
    name: 'Ubuntu SSL tests with AWS-LC'
    runs-on: ${{ matrix.os }}
    timeout-minutes: 60
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-24.04]
        awslc_ver: [1.55.0]
    env:
      AWSLC_VER: ${{ matrix.awslc_ver}}
      MULTISSL_DIR: ${{ github.workspace }}/multissl
      OPENSSL_DIR: ${{ github.workspace }}/multissl/aws-lc/${{ matrix.awslc_ver }}
      LD_LIBRARY_PATH: ${{ github.workspace }}/multissl/aws-lc/${{ matrix.awslc_ver }}/lib
    steps:
    - uses: actions/checkout@v4
      with:
        persist-credentials: false
    - name: Runner image version
      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
    - name: Restore config.cache
      uses: actions/cache@v4
      with:
        path: config.cache
        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
    - name: Register gcc problem matcher
      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
    - name: Install dependencies
      run: sudo ./.github/workflows/posix-deps-apt.sh
    - name: Configure SSL lib env vars
      run: |
        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/aws-lc/${AWSLC_VER}" >> "$GITHUB_ENV"
        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/aws-lc/${AWSLC_VER}/lib" >> "$GITHUB_ENV"
    - name: 'Restore AWS-LC build'
      id: cache-aws-lc
      uses: actions/cache@v4
      with:
        path: ./multissl/aws-lc/${{ matrix.awslc_ver }}
        key: ${{ matrix.os }}-multissl-aws-lc-${{ matrix.awslc_ver }}
    - name: Install AWS-LC
      if: steps.cache-aws-lc.outputs.cache-hit != 'true'
      run: |
        python3 Tools/ssl/multissltests.py \
          --steps=library \
          --base-directory "$MULTISSL_DIR" \
          --awslc ${{ matrix.awslc_ver }} \
          --system Linux
    - name: Add ccache to PATH
      run: |
        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
    - name: Configure ccache action
      uses: hendrikmuhs/ccache-action@v1.2
      with:
        save: false
    - name: Configure CPython
      run: |
        ./configure CFLAGS="-fdiagnostics-format=json" \
          --config-cache \
          --enable-slower-safety \
          --with-pydebug \
          --with-openssl="$OPENSSL_DIR" \
          --with-builtin-hashlib-hashes=blake2 \
          --with-ssl-default-suites=openssl
    - name: Build CPython
      run: make -j
    - name: Display build info
      run: make pythoninfo
    - name: Verify python is linked to AWS-LC
      run: ./python -c 'import ssl; print(ssl.OPENSSL_VERSION)' | grep AWS-LC
    - name: SSL tests
      run: ./python Lib/test/ssltests.py

  build-android:
    name: Android (${{ matrix.arch }})
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    timeout-minutes: 60
    strategy:
      fail-fast: false
      matrix:
        include:
          # Use the same runs-on configuration as build-macos and build-ubuntu.
          - arch: aarch64
            runs-on: ${{ github.repository_owner == 'python' && 'ghcr.io/cirruslabs/macos-runner:sonoma' || 'macos-14' }}
          - arch: x86_64
            runs-on: ubuntu-24.04

    runs-on: ${{ matrix.runs-on }}
    steps:
      - uses: actions/checkout@v4
        with:
          persist-credentials: false
      - name: Build and test
        run: ./Android/android.py ci ${{ matrix.arch }}-linux-android

  build-wasi:
    name: 'WASI'
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    uses: ./.github/workflows/reusable-wasi.yml
    with:
      config_hash: ${{ needs.build-context.outputs.config-hash }}

  test-hypothesis:
    name: "Hypothesis tests on Ubuntu"
    runs-on: ubuntu-24.04
    timeout-minutes: 60
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    env:
      OPENSSL_VER: 3.0.16
      PYTHONSTRICTEXTENSIONBUILD: 1
    steps:
    - uses: actions/checkout@v4
      with:
        persist-credentials: false
    - name: Register gcc problem matcher
      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
    - name: Install dependencies
      run: sudo ./.github/workflows/posix-deps-apt.sh
    - name: Configure OpenSSL env vars
      run: |
        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
    - name: 'Restore OpenSSL build'
      id: cache-openssl
      uses: actions/cache@v4
      with:
        path: ./multissl/openssl/${{ env.OPENSSL_VER }}
        key: ${{ runner.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
    - name: Install OpenSSL
      if: steps.cache-openssl.outputs.cache-hit != 'true'
      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
    - name: Add ccache to PATH
      run: |
        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
    - name: Configure ccache action
      uses: hendrikmuhs/ccache-action@v1.2
      with:
        save: false
    - name: Setup directory envs for out-of-tree builds
      run: |
        echo "CPYTHON_RO_SRCDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-ro-srcdir)" >> "$GITHUB_ENV"
        echo "CPYTHON_BUILDDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-builddir)" >> "$GITHUB_ENV"
    - name: Create directories for read-only out-of-tree builds
      run: mkdir -p "$CPYTHON_RO_SRCDIR" "$CPYTHON_BUILDDIR"
    - name: Bind mount sources read-only
      run: sudo mount --bind -o ro "$GITHUB_WORKSPACE" "$CPYTHON_RO_SRCDIR"
    - name: Runner image version
      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
    - name: Restore config.cache
      uses: actions/cache@v4
      with:
        path: ${{ env.CPYTHON_BUILDDIR }}/config.cache
        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
    - name: Configure CPython out-of-tree
      working-directory: ${{ env.CPYTHON_BUILDDIR }}
      run: |
        ../cpython-ro-srcdir/configure \
          --config-cache \
          --with-pydebug \
          --enable-slower-safety \
          --with-openssl="$OPENSSL_DIR"
    - name: Build CPython out-of-tree
      working-directory: ${{ env.CPYTHON_BUILDDIR }}
      run: make -j4
    - name: Display build info
      working-directory: ${{ env.CPYTHON_BUILDDIR }}
      run: make pythoninfo
    - name: Remount sources writable for tests
      # some tests write to srcdir, lack of pyc files slows down testing
      run: sudo mount "$CPYTHON_RO_SRCDIR" -oremount,rw
    - name: Setup directory envs for out-of-tree builds
      run: |
        echo "CPYTHON_BUILDDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-builddir)" >> "$GITHUB_ENV"
    - name: "Create hypothesis venv"
      working-directory: ${{ env.CPYTHON_BUILDDIR }}
      run: |
        VENV_LOC=$(realpath -m .)/hypovenv
        VENV_PYTHON=$VENV_LOC/bin/python
        echo "HYPOVENV=${VENV_LOC}" >> "$GITHUB_ENV"
        echo "VENV_PYTHON=${VENV_PYTHON}" >> "$GITHUB_ENV"
        ./python -m venv "$VENV_LOC" && "$VENV_PYTHON" -m pip install -r "${GITHUB_WORKSPACE}/Tools/requirements-hypothesis.txt"
    - name: 'Restore Hypothesis database'
      id: cache-hypothesis-database
      uses: actions/cache@v4
      with:
        path: ${{ env.CPYTHON_BUILDDIR }}/.hypothesis/
        key: hypothesis-database-${{ github.head_ref || github.run_id }}
        restore-keys: |
          hypothesis-database-
    - name: "Run tests"
      working-directory: ${{ env.CPYTHON_BUILDDIR }}
      run: |
        # Most of the excluded tests are slow test suites with no property tests
        #
        # (GH-104097) test_sysconfig is skipped because it has tests that are
        # failing when executed from inside a virtual environment.
        "${VENV_PYTHON}" -m test \
          -W \
          --slowest \
          -j4 \
          --timeout 900 \
          -x test_asyncio \
          -x test_multiprocessing_fork \
          -x test_multiprocessing_forkserver \
          -x test_multiprocessing_spawn \
          -x test_concurrent_futures \
          -x test_socket \
          -x test_subprocess \
          -x test_signal \
          -x test_sysconfig
    - uses: actions/upload-artifact@v4
      if: always()
      with:
        name: hypothesis-example-db
        path: ${{ env.CPYTHON_BUILDDIR }}/.hypothesis/examples/

  build-asan:
    name: 'Address sanitizer'
    runs-on: ${{ matrix.os }}
    timeout-minutes: 60
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-24.04]
    env:
      OPENSSL_VER: 3.0.16
      PYTHONSTRICTEXTENSIONBUILD: 1
      ASAN_OPTIONS: detect_leaks=0:allocator_may_return_null=1:handle_segv=0
    steps:
    - uses: actions/checkout@v4
      with:
        persist-credentials: false
    - name: Runner image version
      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
    - name: Restore config.cache
      uses: actions/cache@v4
      with:
        path: config.cache
        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
    - name: Register gcc problem matcher
      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
    - name: Install dependencies
      run: sudo ./.github/workflows/posix-deps-apt.sh
    - name: Set up GCC-10 for ASAN
      uses: egor-tensin/setup-gcc@v1
      with:
        version: 10
    - name: Configure OpenSSL env vars
      run: |
        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
    - name: 'Restore OpenSSL build'
      id: cache-openssl
      uses: actions/cache@v4
      with:
        path: ./multissl/openssl/${{ env.OPENSSL_VER }}
        key: ${{ matrix.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
    - name: Install OpenSSL
      if: steps.cache-openssl.outputs.cache-hit != 'true'
      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
    - name: Add ccache to PATH
      run: |
        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
    - name: Configure ccache action
      uses: hendrikmuhs/ccache-action@v1.2
      with:
        save: ${{ github.event_name == 'push' }}
        max-size: "200M"
    - name: Configure CPython
      run: ./configure --config-cache --with-address-sanitizer --without-pymalloc
    - name: Build CPython
      run: make -j4
    - name: Display build info
      run: make pythoninfo
    - name: Tests
      run: xvfb-run make ci

  build-san:
    # ${{ '' } is a hack to nest jobs under the same sidebar category.
    name: Sanitizers${{ '' }}  # zizmor: ignore[obfuscation]
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    strategy:
      fail-fast: false
      matrix:
        check-name:
        - Thread
        free-threading:
        - false
        - true
        sanitizer:
        - TSan
        include:
        - check-name: Undefined behavior
          sanitizer: UBSan
          free-threading: false
    uses: ./.github/workflows/reusable-san.yml
    with:
      sanitizer: ${{ matrix.sanitizer }}
      config_hash: ${{ needs.build-context.outputs.config-hash }}
      free-threading: ${{ matrix.free-threading }}

  cross-build-linux:
    name: Cross build Linux
    runs-on: ubuntu-latest
    timeout-minutes: 60
    needs: build-context
    if: needs.build-context.outputs.run-tests == 'true'
    steps:
      - uses: actions/checkout@v4
        with:
          persist-credentials: false
      - name: Runner image version
        run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
      - name: Restore config.cache
        uses: actions/cache@v4
        with:
          path: config.cache
          key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
      - name: Register gcc problem matcher
        run: echo "::add-matcher::.github/problem-matchers/gcc.json"
      - name: Set build dir
        run:
          # an absolute path outside of the working directoy
          echo "BUILD_DIR=$(realpath ${{ github.workspace }}/../build)" >> "$GITHUB_ENV"
      - name: Install dependencies
        run: sudo ./.github/workflows/posix-deps-apt.sh
      - name: Configure host build
        run: ./configure --prefix="$BUILD_DIR/host-python"
      - name: Install host Python
        run: make -j8 install
      - name: Run test subset with host build
        run: |
          "$BUILD_DIR/host-python/bin/python3" -m test test_sysconfig test_site test_embed
      - name: Configure cross build
        run: ./configure --prefix="$BUILD_DIR/cross-python" --with-build-python="$BUILD_DIR/host-python/bin/python3"
      - name: Install cross Python
        run: make -j8 install
      - name: Run test subset with host build
        run: |
          "$BUILD_DIR/cross-python/bin/python3" -m test test_sysconfig test_site test_embed

  # CIFuzz job based on https://google.github.io/oss-fuzz/getting-started/continuous-integration/
  cifuzz:
    name: CIFuzz
    runs-on: ubuntu-latest
    timeout-minutes: 60
    needs: build-context
    if: needs.build-context.outputs.run-ci-fuzz == 'true'
    permissions:
      security-events: write
    strategy:
      fail-fast: false
      matrix:
        sanitizer: [address, undefined, memory]
    steps:
      - name: Build fuzzers (${{ matrix.sanitizer }})
        id: build
        uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
        with:
          oss-fuzz-project-name: cpython3
          sanitizer: ${{ matrix.sanitizer }}
      - name: Run fuzzers (${{ matrix.sanitizer }})
        uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
        with:
          fuzz-seconds: 600
          oss-fuzz-project-name: cpython3
          output-sarif: true
          sanitizer: ${{ matrix.sanitizer }}
      - name: Upload crash
        if: failure() && steps.build.outcome == 'success'
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.sanitizer }}-artifacts
          path: ./out/artifacts
      - name: Upload SARIF
        if: always() && steps.build.outcome == 'success'
        uses: github/codeql-action/upload-sarif@v3
        with:
          sarif_file: cifuzz-sarif/results.sarif
          checkout_path: cifuzz-sarif

  all-required-green:  # This job does nothing and is only used for the branch protection
    name: All required checks pass
    runs-on: ubuntu-latest
    timeout-minutes: 5
    needs:
    - build-context  # Transitive dependency, needed to access `run-tests` value
    - check-docs
    - check-autoconf-regen
    - check-generated-files
    - build-windows
    - build-windows-msi
    - build-macos
    - build-ubuntu
    - build-ubuntu-ssltests-awslc
    - build-ubuntu-ssltests-openssl
    - build-android
    - build-wasi
    - test-hypothesis
    - build-asan
    - build-san
    - cross-build-linux
    - cifuzz
    if: always()

    steps:
    - name: Check whether the needed jobs succeeded or failed
      uses: re-actors/alls-green@05ac9388f0aebcb5727afa17fcccfecd6f8ec5fe
      with:
        allowed-failures: >-
          build-windows-msi,
          build-ubuntu-ssltests-awslc,
          build-ubuntu-ssltests-openssl,
          test-hypothesis,
          cifuzz,
        allowed-skips: >-
          ${{
            !fromJSON(needs.build-context.outputs.run-docs)
            && '
            check-docs,
            '
            || ''
          }}
          ${{
            needs.build-context.outputs.run-tests != 'true'
            && '
            check-autoconf-regen,
            check-generated-files,
            build-macos,
            build-ubuntu,
            build-ubuntu-ssltests-awslc,
            build-ubuntu-ssltests-openssl,
            build-android,
            build-wasi,
            test-hypothesis,
            build-asan,
            build-san,
            cross-build-linux,
            '
            || ''
          }}
          ${{
            !fromJSON(needs.build-context.outputs.run-windows-tests)
            && '
            build-windows,
            '
            || ''
          }}
          ${{
            !fromJSON(needs.build-context.outputs.run-ci-fuzz)
            && '
            cifuzz,
            '
            || ''
          }}
        jobs: ${{ toJSON(needs) }}