ci.yml

name: CI

on:
  workflow_dispatch:
  pull_request:
  push:
    branches:
      - drake

permissions: read-all

concurrency:
  group: test-${{ github.ref }}
  cancel-in-progress: true

env:
  PIP_BREAK_SYSTEM_PACKAGES: 1
  PIP_ONLY_BINARY: numpy
  FORCE_COLOR: 3
  PYTEST_TIMEOUT: 300
  # For cmake:
  VERBOSE: 1

jobs:
  # This is the "main" test suite, which tests a large number of different
  # versions of default compilers and Python versions in GitHub Actions.
  standard:
    strategy:
      fail-fast: false
      matrix:
        # runs-on: [ubuntu-20.04, windows-2022, macos-latest]
        runs-on: [ubuntu-20.04, macos-latest]
        python:
        # - '3.6'
        # - '3.9'
        - '3.10'
        - '3.11'
        - '3.12'
        # - 'pypy-3.8'
        # - 'pypy-3.9'
        # - 'pypy-3.10'
        numpy_version:
        - '1.x'
        - '2.x'

        # Items in here will either be added to the build matrix (if not
        # present), or add new keys to an existing matrix element if all the
        # existing keys match.
        #
        # We support an optional key: args, for cmake args
        include:
          # Just add a key
          - runs-on: ubuntu-20.04
            python: '3.6'
            args: >
              -DPYBIND11_FINDPYTHON=ON
              -DCMAKE_CXX_FLAGS="-D_=1"
          # - runs-on: ubuntu-20.04
          #   python: 'pypy-3.8'
          #   args: >
          #     -DPYBIND11_FINDPYTHON=ON
          # - runs-on: windows-2019
          #   python: '3.6'
          #   args: >
          #     -DPYBIND11_FINDPYTHON=ON
          # Inject a couple Windows 2019 runs
          # - runs-on: windows-2019
          #   python: '3.9'
          # - runs-on: windows-2019
          #   python: '2.7'

    name: "🐍 ${{ matrix.python }} • ${{ matrix.runs-on }} • x64 • NumPy ${{ matrix.numpy_version }} • ${{ matrix.args }}"
    runs-on: ${{ matrix.runs-on }}

    steps:
    - uses: actions/checkout@v4

    - name: Setup Python ${{ matrix.python }}
      uses: actions/setup-python@v5
      with:
        python-version: ${{ matrix.python }}

    - name: Setup Boost (Linux)
      # Can't use boost + define _
      if: runner.os == 'Linux' && matrix.python != '3.6'
      run: sudo apt-get install libboost-dev

    - name: Setup Boost (macOS)
      if: runner.os == 'macOS'
      run: brew install boost

    - name: Update CMake
      uses: jwlawson/actions-setup-cmake@v2.0

    - name: Cache wheels
      if: runner.os == 'macOS'
      uses: actions/cache@v4
      with:
        # This path is specific to macOS - we really only need it for PyPy NumPy wheels
        # See https://github.com/actions/cache/blob/master/examples.md#python---pip
        # for ways to do this more generally
        path: ~/Library/Caches/pip
        # Look to see if there is a cache hit for the corresponding requirements file
        key: ${{ runner.os }}-pip-${{ matrix.python }}-x64-${{ hashFiles('tests/requirements.txt') }}

    - name: Prepare env
      run: |
        python -m pip install -r tests/requirements.txt

    - name: Install NumPy >= 2
      if: matrix.numpy_version == '2.x'
      run: pip install 'numpy>=2.0.0b1'

    - name: Setup annotations on Linux
      if: runner.os == 'Linux'
      run: python -m pip install pytest-github-actions-annotate-failures

    # First build - C++11 mode and inplace
    # More-or-less randomly adding -DPYBIND11_SIMPLE_GIL_MANAGEMENT=ON here
    # (same for PYBIND11_NUMPY_1_ONLY, but requires a NumPy 1.x at runtime).
    - name: Configure C++11 ${{ matrix.args }}
      run: >
        cmake -S . -B .
        -DPYBIND11_WERROR=ON
        -DPYBIND11_DISABLE_HANDLE_TYPE_NAME_DEFAULT_IMPLEMENTATION=ON
        -DPYBIND11_SIMPLE_GIL_MANAGEMENT=ON
        -DPYBIND11_NUMPY_1_ONLY=ON
        -DDOWNLOAD_CATCH=ON
        -DDOWNLOAD_EIGEN=ON
        -DCMAKE_CXX_STANDARD=11
        ${{ matrix.args }}

    - name: Build C++11
      run: cmake --build . -j 2

    - name: Python tests C++11
      run: cmake --build . --target pytest -j 2

    - name: C++11 tests
      # TODO: Figure out how to load the DLL on Python 3.8+
      if: "!(runner.os == 'Windows' && (matrix.python == 3.8 || matrix.python == 3.9 || matrix.python == '3.10' || matrix.python == '3.11' || matrix.python == 'pypy-3.8'))"
      run: cmake --build .  --target cpptest -j 2

    - name: Interface test C++11
      run: cmake --build . --target test_cmake_build

    - name: Clean directory
      run: git clean -fdx

    # Second build - C++17 mode and in a build directory
    # More-or-less randomly adding -DPYBIND11_SIMPLE_GIL_MANAGEMENT=OFF here.
    # (same for PYBIND11_NUMPY_1_ONLY, but requires a NumPy 1.x at runtime).
    - name: Configure C++17
      run: >
        cmake -S . -B build2
        -DPYBIND11_WERROR=ON
        -DPYBIND11_SIMPLE_GIL_MANAGEMENT=OFF
        -DPYBIND11_NUMPY_1_ONLY=ON
        -DDOWNLOAD_CATCH=ON
        -DDOWNLOAD_EIGEN=ON
        -DCMAKE_CXX_STANDARD=17
        ${{ matrix.args }}

    - name: Build
      run: cmake --build build2 -j 2

    - name: Python tests
      run: cmake --build build2 --target pytest

    - name: C++ tests
      # TODO: Figure out how to load the DLL on Python 3.8+
      if: "!(runner.os == 'Windows' && (matrix.python == 3.8 || matrix.python == 3.9 || matrix.python == '3.10' || matrix.python == '3.11' || matrix.python == 'pypy-3.8'))"
      run: cmake --build build2 --target cpptest

    # Third build - C++17 mode with unstable ABI
    - name: Configure (unstable ABI)
      run: >
        cmake -S . -B build3
        -DPYBIND11_WERROR=ON
        -DDOWNLOAD_CATCH=ON
        -DDOWNLOAD_EIGEN=ON
        -DCMAKE_CXX_STANDARD=17
        -DPYBIND11_INTERNALS_VERSION=10000000
        ${{ matrix.args }}

    - name: Build (unstable ABI)
      run: cmake --build build3 -j 2

    - name: Python tests (unstable ABI)
      run: cmake --build build3 --target pytest

    - name: Interface test
      run: cmake --build build2 --target test_cmake_build

    # This makes sure the setup_helpers module can build packages using
    # setuptools
    - name: Setuptools helpers test
      run: |
        pip install setuptools
        pytest tests/extra_setuptools
      if: "!(matrix.runs-on == 'windows-2022')"


  # deadsnakes:
  #   strategy:
  #     fail-fast: false
  #     matrix:
  #       include:
  #       # TODO: Fails on 3.10, investigate
  #       # JOB DISABLED (NEEDS WORK): https://github.com/pybind/pybind11/issues/4889
        # - python-version: "3.9"
  #       #   python-debug: true
  #       #   valgrind: true
  #       - python-version: "3.11"
  #         python-debug: false

  #   name: "🐍 ${{ matrix.python-version }}${{ matrix.python-debug && '-dbg' || '' }} (deadsnakes)${{ matrix.valgrind && ' • Valgrind' || '' }} • x64"
  #   runs-on: ubuntu-20.04

  #   steps:
  #   - uses: actions/checkout@v4

  #   - name: Setup Python ${{ matrix.python-version }} (deadsnakes)
  #     uses: deadsnakes/action@v3.1.0
  #     with:
  #       python-version: ${{ matrix.python-version }}
  #       debug: ${{ matrix.python-debug }}

  #   - name: Update CMake
  #     uses: jwlawson/actions-setup-cmake@v2.0

  #   - name: Valgrind cache
  #     if: matrix.valgrind
  #     uses: actions/cache@v4
  #     id: cache-valgrind
  #     with:
  #       path: valgrind
  #       key: 3.16.1 # Valgrind version

  #   - name: Compile Valgrind
  #     if: matrix.valgrind && steps.cache-valgrind.outputs.cache-hit != 'true'
  #     run: |
  #       VALGRIND_VERSION=3.16.1
  #       curl https://sourceware.org/pub/valgrind/valgrind-$VALGRIND_VERSION.tar.bz2 -o - | tar xj
  #       mv valgrind-$VALGRIND_VERSION valgrind
  #       cd valgrind
  #       ./configure
  #       make -j 2 > /dev/null

  #   - name: Install Valgrind
  #     if: matrix.valgrind
  #     working-directory: valgrind
  #     run: |
  #       sudo make install
  #       sudo apt-get update
  #       sudo apt-get install libc6-dbg  # Needed by Valgrind

  #   - name: Prepare env
  #     run: |
  #       python -m pip install -r tests/requirements.txt

  #   - name: Configure
  #     env:
  #       SETUPTOOLS_USE_DISTUTILS: stdlib
  #     run: >
  #       cmake -S . -B build
  #       -DCMAKE_BUILD_TYPE=Debug
  #       -DPYBIND11_WERROR=ON
  #       -DDOWNLOAD_CATCH=ON
  #       -DDOWNLOAD_EIGEN=ON
  #       -DCMAKE_CXX_STANDARD=17

  #   - name: Build
  #     run: cmake --build build -j 2

  #   - name: Python tests
  #     run: cmake --build build --target pytest

  #   - name: C++ tests
  #     run: cmake --build build --target cpptest

  #   - name: Run Valgrind on Python tests
  #     if: matrix.valgrind
  #     run: cmake --build build --target memcheck


  # Testing on clang using the excellent silkeh clang docker images
  clang:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        clang:
          # - 3.6
          # - 3.7
          # - 3.9
          - 7
          - 9
          - dev
        std:
          - 11
        container_suffix:
          - ""
        include:
          # - clang: 5
          #   std: 14
          - clang: 10
            std: 17
          - clang: 11
            std: 20
          - clang: 12
            std: 20
          - clang: 13
            std: 20
          - clang: 14
            std: 20
          - clang: 15
            std: 20
            container_suffix: "-bullseye"
          - clang: 16
            std: 20
            container_suffix: "-bullseye"

    name: "🐍 3 • Clang ${{ matrix.clang }} • C++${{ matrix.std }} • x64"
    container: "silkeh/clang:${{ matrix.clang }}${{ matrix.container_suffix }}"

    steps:
    - uses: actions/checkout@v4

    - name: Add wget and python3
      run: apt-get update && apt-get install -y python3-dev python3-numpy python3-pytest libeigen3-dev

    - name: Configure
      shell: bash
      run: >
        cmake -S . -B build
        -DPYBIND11_WERROR=ON
        -DDOWNLOAD_CATCH=ON
        -DCMAKE_CXX_STANDARD=${{ matrix.std }}
        -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")

    - name: Build
      run: cmake --build build -j 2

    - name: Python tests
      run: cmake --build build --target pytest

    - name: C++ tests
      run: cmake --build build --target cpptest

    - name: Interface test
      run: cmake --build build --target test_cmake_build


  # # Testing NVCC; forces sources to behave like .cu files
  # cuda:
  #   runs-on: ubuntu-latest
  #   name: "🐍 3.10 • CUDA 12.2 • Ubuntu 22.04"
  #   container: nvidia/cuda:12.2.0-devel-ubuntu22.04

  #   steps:
  #   - uses: actions/checkout@v4

  #   # tzdata will try to ask for the timezone, so set the DEBIAN_FRONTEND
  #   - name: Install 🐍 3
  #     run: apt-get update && DEBIAN_FRONTEND="noninteractive" apt-get install -y cmake git python3-dev python3-pytest python3-numpy

  #   - name: Configure
  #     run: cmake -S . -B build -DPYBIND11_CUDA_TESTS=ON -DPYBIND11_WERROR=ON -DDOWNLOAD_CATCH=ON

  #   - name: Build
  #     run: cmake --build build -j2 --verbose

  #   - name: Python tests
  #     run: cmake --build build --target pytest


# TODO: Internal compiler error - report to NVidia
#  # Testing CentOS 8 + PGI compilers
#  centos-nvhpc8:
#    runs-on: ubuntu-latest
#    name: "🐍 3 • CentOS8 / PGI 20.11 • x64"
#    container: centos:8
#
#    steps:
#    - uses: actions/checkout@v4
#
#    - name: Add Python 3 and a few requirements
#      run: yum update -y && yum install -y git python3-devel python3-numpy python3-pytest make environment-modules
#
#    - name: Install CMake with pip
#      run: |
#        python3 -m pip install --upgrade pip
#        python3 -m pip install cmake --prefer-binary
#
#    - name: Install NVidia HPC SDK
#      run: >
#        yum -y install
#        https://developer.download.nvidia.com/hpc-sdk/20.11/nvhpc-20-11-20.11-1.x86_64.rpm
#        https://developer.download.nvidia.com/hpc-sdk/20.11/nvhpc-2020-20.11-1.x86_64.rpm
#
#    - name: Configure
#      shell: bash
#      run: |
#        source /etc/profile.d/modules.sh
#        module load /opt/nvidia/hpc_sdk/modulefiles/nvhpc/20.11
#        cmake -S . -B build -DDOWNLOAD_CATCH=ON -DCMAKE_CXX_STANDARD=14 -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")
#
#    - name: Build
#      run: cmake --build build -j 2 --verbose
#
#    - name: Python tests
#      run: cmake --build build --target pytest
#
#    - name: C++ tests
#      run: cmake --build build --target cpptest
#
#    - name: Interface test
#      run: cmake --build build --target test_cmake_build


  # # Testing on Ubuntu + NVHPC (previous PGI) compilers, which seems to require more workarounds
  # ubuntu-nvhpc7:
  #   runs-on: ubuntu-20.04
  #   name: "🐍 3 • NVHPC 23.5 • C++17 • x64"

  #   env:
  #     # tzdata will try to ask for the timezone, so set the DEBIAN_FRONTEND
  #     DEBIAN_FRONTEND: 'noninteractive'
  #   steps:
  #   - uses: actions/checkout@v4

  #   - name: Add NVHPC Repo
  #     run: |
  #       echo 'deb [trusted=yes] https://developer.download.nvidia.com/hpc-sdk/ubuntu/amd64 /' | \
  #         sudo tee /etc/apt/sources.list.d/nvhpc.list

  #   - name: Install 🐍 3 & NVHPC
  #     run: |
  #       sudo apt-get update -y && \
  #       sudo apt-get install -y cmake environment-modules git python3-dev python3-pip python3-numpy && \
  #       sudo apt-get install -y --no-install-recommends nvhpc-23-5 && \
  #       sudo rm -rf /var/lib/apt/lists/*
  #       python3 -m pip install --upgrade pip
  #       python3 -m pip install --upgrade pytest

  #   # On some systems, you many need further workarounds:
  #   # https://github.com/pybind/pybind11/pull/2475
  #   - name: Configure
  #     shell: bash
  #     run: |
  #       source /etc/profile.d/modules.sh
  #       module load /opt/nvidia/hpc_sdk/modulefiles/nvhpc/23.5
  #       cmake -S . -B build -DDOWNLOAD_CATCH=ON \
  #                           -DCMAKE_CXX_STANDARD=17 \
  #                           -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)") \
  #                           -DCMAKE_CXX_FLAGS="-Wc,--pending_instantiations=0" \
  #                           -DPYBIND11_TEST_FILTER="test_smart_ptr.cpp"

  #   - name: Build
  #     run: cmake --build build -j 2 --verbose

  #   - name: Python tests
  #     run: cmake --build build --target pytest

  #   - name: C++ tests
  #     run: cmake --build build --target cpptest

  #   - name: Interface test
  #     run: cmake --build build --target test_cmake_build


  # Testing on GCC using the GCC docker images (only recent images supported)
  gcc:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - { gcc: 7, std: 11 }
          - { gcc: 7, std: 17 }
          - { gcc: 8, std: 14 }
          - { gcc: 8, std: 17 }
          - { gcc: 10, std: 17 }
          - { gcc: 11, std: 20 }
          - { gcc: 12, std: 20 }
          - { gcc: 13, std: 20 }

    name: "🐍 3 • GCC ${{ matrix.gcc }} • C++${{ matrix.std }}• x64"
    container: "gcc:${{ matrix.gcc }}"

    steps:
    - uses: actions/checkout@v4

    - name: Add Python 3
      run: apt-get update; apt-get install -y python3-dev python3-numpy python3-pytest python3-pip libeigen3-dev

    - name: Update pip
      run: python3 -m pip install --upgrade pip

    - name: Update CMake
      uses: jwlawson/actions-setup-cmake@v2.0

    - name: Configure
      shell: bash
      run: >
        cmake -S . -B build
        -DPYBIND11_WERROR=ON
        -DDOWNLOAD_CATCH=ON
        -DCMAKE_CXX_STANDARD=${{ matrix.std }}
        -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")

    - name: Build
      run: cmake --build build -j 2

    - name: Python tests
      run: cmake --build build --target pytest

    - name: C++ tests
      run: cmake --build build --target cpptest

    - name: Interface test
      run: cmake --build build --target test_cmake_build

    - name: Configure - Exercise cmake -DPYBIND11_TEST_OVERRIDE
      if: matrix.gcc == '12'
      shell: bash
      run: >
        cmake -S . -B build_partial
        -DPYBIND11_WERROR=ON
        -DDOWNLOAD_CATCH=ON
        -DCMAKE_CXX_STANDARD=${{ matrix.std }}
        -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")
        "-DPYBIND11_TEST_OVERRIDE=test_call_policies.cpp;test_gil_scoped.cpp;test_thread.cpp"

    - name: Build - Exercise cmake -DPYBIND11_TEST_OVERRIDE
      if: matrix.gcc == '12'
      run: cmake --build build_partial -j 2

    - name: Python tests - Exercise cmake -DPYBIND11_TEST_OVERRIDE
      if: matrix.gcc == '12'
      run: cmake --build build_partial --target pytest

  # # Testing on ICC using the oneAPI apt repo
  # icc:
  #   runs-on: ubuntu-20.04

  #   name: "🐍 3 • ICC latest • x64"

  #   steps:
  #   - uses: actions/checkout@v4

  #   - name: Add apt repo
  #     run: |
  #       sudo apt-get update
  #       sudo apt-get install -y wget build-essential pkg-config cmake ca-certificates gnupg
  #       wget https://apt.repos.intel.com/intel-gpg-keys/GPG-PUB-KEY-INTEL-SW-PRODUCTS-2023.PUB
  #       sudo apt-key add GPG-PUB-KEY-INTEL-SW-PRODUCTS-2023.PUB
  #       echo "deb https://apt.repos.intel.com/oneapi all main" | sudo tee /etc/apt/sources.list.d/oneAPI.list

  #   - name: Add ICC & Python 3
  #     run: sudo apt-get update; sudo apt-get install -y intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic cmake python3-dev python3-numpy python3-pytest python3-pip

  #   - name: Update pip
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       python3 -m pip install --upgrade pip

  #   - name: Install dependencies
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       python3 -m pip install -r tests/requirements.txt

  #   - name: Configure C++11
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       cmake -S . -B build-11     \
  #       -DPYBIND11_WERROR=ON    \
  #       -DDOWNLOAD_CATCH=ON     \
  #       -DDOWNLOAD_EIGEN=OFF    \
  #       -DCMAKE_CXX_STANDARD=11             \
  #       -DCMAKE_CXX_COMPILER=$(which icpc)  \
  #       -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")

  #   - name: Build C++11
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       cmake --build build-11 -j 2 -v

  #   - name: Python tests C++11
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       sudo service apport stop
  #       cmake --build build-11 --target check

  #   - name: C++ tests C++11
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       cmake --build build-11 --target cpptest

  #   - name: Interface test C++11
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       cmake --build build-11 --target test_cmake_build

  #   - name: Configure C++17
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       cmake -S . -B build-17     \
  #       -DPYBIND11_WERROR=ON    \
  #       -DDOWNLOAD_CATCH=ON     \
  #       -DDOWNLOAD_EIGEN=OFF    \
  #       -DCMAKE_CXX_STANDARD=17             \
  #       -DCMAKE_CXX_COMPILER=$(which icpc)  \
  #       -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")

  #   - name: Build C++17
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       cmake --build build-17 -j 2 -v

  #   - name: Python tests C++17
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       sudo service apport stop
  #       cmake --build build-17 --target check

  #   - name: C++ tests C++17
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       cmake --build build-17 --target cpptest

  #   - name: Interface test C++17
  #     run: |
  #       set +e; source /opt/intel/oneapi/setvars.sh; set -e
  #       cmake --build build-17 --target test_cmake_build


  # # Testing on CentOS (manylinux uses a centos base, and this is an easy way
  # # to get GCC 4.8, which is the manylinux1 compiler).
  # centos:
  #   runs-on: ubuntu-latest
  #   strategy:
  #     fail-fast: false
  #     matrix:
  #       container:
  #         - "centos:7"  # GCC 4.8
  #         - "almalinux:8"
  #         - "almalinux:9"

  #   name: "🐍 3 • ${{ matrix.container }} • x64"
  #   container: "${{ matrix.container }}"

  #   steps:
  #   - name: Latest actions/checkout
  #     uses: actions/checkout@v4
  #     if: matrix.container != 'centos:7'

  #   - name: Pin actions/checkout as required for centos:7
  #     uses: actions/checkout@v3
  #     if: matrix.container == 'centos:7'

  #   - name: Add Python 3 (RHEL 7)
  #     if: matrix.container == 'centos:7'
  #     run: yum update -y && yum install -y python3-devel gcc-c++ make git

    # - name: Add Python 3 (RHEL 8+)
    #   if: matrix.container != 'centos:7'
    #   run: dnf update -y && dnf install -y python3-devel gcc-c++ make git

  #   - name: Update pip
  #     run: python3 -m pip install --upgrade pip

  #   - name: Install dependencies
  #     run: |
  #       python3 -m pip install cmake -r tests/requirements.txt

    # - name: Ensure NumPy 2 is used (required Python >= 3.9)
    #   if: matrix.container == 'almalinux:9'
    #   run: |
    #     python3 -m pip install 'numpy>=2.0.0b1' 'scipy>=1.13.0rc1'

    # - name: Configure
    #   shell: bash
    #   run: >
    #     cmake -S . -B build
    #     -DCMAKE_BUILD_TYPE=MinSizeRel
    #     -DPYBIND11_WERROR=ON
    #     -DDOWNLOAD_CATCH=ON
    #     -DDOWNLOAD_EIGEN=ON
    #     -DCMAKE_CXX_STANDARD=11
    #     -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")

  #   - name: Build
  #     run: cmake --build build -j 2

  #   - name: Python tests
  #     run: cmake --build build --target pytest

  #   - name: C++ tests
  #     run: cmake --build build --target cpptest

  #   - name: Interface test
  #     run: cmake --build build --target test_cmake_build


  # # This tests an "install" with the CMake tools
  # install-classic:
  #   name: "🐍 3.7 • Debian • x86 •  Install"
  #   runs-on: ubuntu-latest
  #   container: i386/debian:buster

  #   steps:
  #   - uses: actions/checkout@v1  # v1 is required to run inside docker

  #   - name: Install requirements
  #     run: |
  #       apt-get update
  #       apt-get install -y git make cmake g++ libeigen3-dev python3-dev python3-pip
  #       pip3 install "pytest==6.*"

  #   - name: Configure for install
  #     run: >
  #       cmake .
  #       -DPYBIND11_INSTALL=1 -DPYBIND11_TEST=0
  #       -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")

  #   - name: Make and install
  #     run: make install

  #   - name: Copy tests to new directory
  #     run: cp -a tests /pybind11-tests

  #   - name: Make a new test directory
  #     run: mkdir /build-tests

  #   - name: Configure tests
  #     run: >
  #       cmake ../pybind11-tests
  #       -DDOWNLOAD_CATCH=ON
  #       -DPYBIND11_WERROR=ON
  #       -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")
  #     working-directory: /build-tests

  #   - name: Python tests
  #     run: make pytest -j 2
  #     working-directory: /build-tests


  # # This verifies that the documentation is not horribly broken, and does a
  # # basic validation check on the SDist.
  # doxygen:
  #   name: "Documentation build test"
  #   runs-on: ubuntu-latest

  #   steps:
  #   - uses: actions/checkout@v4

  #   - uses: actions/setup-python@v5
  #     with:
  #       python-version: "3.x"

  #   - name: Install Doxygen
  #     run: sudo apt-get install -y doxygen librsvg2-bin # Changed to rsvg-convert in 20.04

  #   - name: Build docs
  #     run: pipx run nox -s docs

  #   - name: Make SDist
  #     run: pipx run nox -s build -- --sdist

  #   - run: git status --ignored

  #   - name: Check local include dir
  #     run: >
  #       ls pybind11;
  #       python3 -c "import pybind11, pathlib; assert (a := pybind11.get_include()) == (b := str(pathlib.Path('include').resolve())), f'{a} != {b}'"

  #   - name: Compare Dists (headers only)
  #     working-directory: include
  #     run: |
  #       python3 -m pip install --user -U ../dist/*.tar.gz
  #       installed=$(python3 -c "import pybind11; print(pybind11.get_include() + '/pybind11')")
  #       diff -rq $installed ./pybind11

  # win32:
  #   strategy:
  #     fail-fast: false
  #     matrix:
  #       python:
  #       - 3.5
  #       - 3.6
  #       - 3.7
  #       - 3.8
  #       - 3.9
  #       - pypy-3.6

  #       include:
  #         - python: 3.9
  #           args: -DCMAKE_CXX_STANDARD=20
  #         - python: 3.8
  #           args: -DCMAKE_CXX_STANDARD=17
  #         - python: 3.7
  #           args: -DCMAKE_CXX_STANDARD=14


  #   name: "🐍 ${{ matrix.python }} • MSVC 2019 • x86 ${{ matrix.args }}"
  #   runs-on: windows-2019

  #   steps:
  #   - uses: actions/checkout@v4

  #   - name: Setup Python ${{ matrix.python }}
  #     uses: actions/setup-python@v5
  #     with:
  #       python-version: ${{ matrix.python }}
  #       architecture: x86

  #   - name: Update CMake
  #     uses: jwlawson/actions-setup-cmake@v2.0

  #   - name: Prepare MSVC
  #     uses: ilammy/msvc-dev-cmd@v1.13.0
  #     with:
  #       arch: x86

  #   - name: Prepare env
  #     run: |
  #       python -m pip install -r tests/requirements.txt

  #   # First build - C++11 mode and inplace
  #   - name: Configure ${{ matrix.args }}
  #     run: >
  #       cmake -S . -B build
  #       -G "Visual Studio 16 2019" -A Win32
  #       -DPYBIND11_WERROR=ON
  #       -DDOWNLOAD_CATCH=ON
  #       -DDOWNLOAD_EIGEN=ON
  #       ${{ matrix.args }}
  #   - name: Build C++11
  #     run: cmake --build build -j 2

  #   - name: Python tests
  #     run: cmake --build build -t pytest

  # win32-debug:
  #   strategy:
  #     fail-fast: false
  #     matrix:
  #       python:
  #       - 3.8
  #       - 3.9

  #       include:
  #         - python: 3.9
  #           args: -DCMAKE_CXX_STANDARD=20
  #         - python: 3.8
  #           args: -DCMAKE_CXX_STANDARD=17

  #   name: "🐍 ${{ matrix.python }} • MSVC 2019 (Debug) • x86 ${{ matrix.args }}"
  #   runs-on: windows-2019

  #   steps:
  #   - uses: actions/checkout@v4

  #   - name: Setup Python ${{ matrix.python }}
  #     uses: actions/setup-python@v5
  #     with:
  #       python-version: ${{ matrix.python }}
  #       architecture: x86

  #   - name: Update CMake
  #     uses: jwlawson/actions-setup-cmake@v2.0

  #   - name: Prepare MSVC
  #     uses: ilammy/msvc-dev-cmd@v1.13.0
  #     with:
  #       arch: x86

  #   - name: Prepare env
  #     run: |
  #       python -m pip install -r tests/requirements.txt

  #   # First build - C++11 mode and inplace
  #   - name: Configure ${{ matrix.args }}
  #     run: >
  #       cmake -S . -B build
  #       -G "Visual Studio 16 2019" -A Win32
  #       -DCMAKE_BUILD_TYPE=Debug
  #       -DPYBIND11_WERROR=ON
  #       -DDOWNLOAD_CATCH=ON
  #       -DDOWNLOAD_EIGEN=ON
  #       ${{ matrix.args }}
  #   - name: Build C++11
  #     run: cmake --build build --config Debug -j 2

  #   - name: Python tests
  #     run: cmake --build build --config Debug -t pytest


  # windows-2022:
  #   strategy:
  #     fail-fast: false
  #     matrix:
  #       python:
  #       - 3.9

  #   name: "🐍 ${{ matrix.python }} • MSVC 2022 C++20 • x64"
  #   runs-on: windows-2022

  #   steps:
  #   - uses: actions/checkout@v4

  #   - name: Setup Python ${{ matrix.python }}
  #     uses: actions/setup-python@v5
  #     with:
  #       python-version: ${{ matrix.python }}

    # - name: Prepare env
      # Ensure use of NumPy 2 (via NumPy nightlies but can be changed soon)
    #   run: |
    #     python3 -m pip install -r tests/requirements.txt
    #     python3 -m pip install 'numpy>=2.0.0b1' 'scipy>=1.13.0rc1'

    # - name: Update CMake
    #   uses: jwlawson/actions-setup-cmake@v2.0

    # - name: Configure C++20
    #   run: >
    #     cmake -S . -B build
    #     -DPYBIND11_WERROR=ON
    #     -DDOWNLOAD_CATCH=ON
    #     -DDOWNLOAD_EIGEN=ON
    #     -DCMAKE_CXX_STANDARD=20

  #   - name: Build C++20
  #     run: cmake --build build -j 2

  #   - name: Python tests
      # run: cmake --build build --target pytest

    # - name: C++20 tests
  #     run: cmake --build build --target cpptest -j 2

    # - name: Interface test C++20
    #   run: cmake --build build --target test_cmake_build

    # - name: Configure C++20 - Exercise cmake -DPYBIND11_TEST_OVERRIDE
    #   run: >
    #     cmake -S . -B build_partial
    #     -DPYBIND11_WERROR=ON
    #     -DDOWNLOAD_CATCH=ON
    #     -DDOWNLOAD_EIGEN=ON
    #     -DCMAKE_CXX_STANDARD=20
    #     "-DPYBIND11_TEST_OVERRIDE=test_call_policies.cpp;test_gil_scoped.cpp;test_thread.cpp"

    # - name: Build C++20 - Exercise cmake -DPYBIND11_TEST_OVERRIDE
    #   run: cmake --build build_partial -j 2

    # - name: Python tests - Exercise cmake -DPYBIND11_TEST_OVERRIDE
    #   run: cmake --build build_partial --target pytest

  # mingw:
  #   name: "🐍 3 • windows-latest • ${{ matrix.sys }}"
  #   runs-on: windows-latest
  #   defaults:
  #     run:
  #       shell: msys2 {0}
  #   strategy:
  #     fail-fast: false
  #     matrix:
  #       include:
  #         - { sys: mingw64, env: x86_64 }
  #         - { sys: mingw32, env: i686 }
  #   steps:
  #   - uses: msys2/setup-msys2@v2
  #     with:
  #       msystem: ${{matrix.sys}}
  #       install: >-
  #         git
  #         mingw-w64-${{matrix.env}}-gcc
  #         mingw-w64-${{matrix.env}}-python-pip
  #         mingw-w64-${{matrix.env}}-python-numpy
  #         mingw-w64-${{matrix.env}}-cmake
  #         mingw-w64-${{matrix.env}}-make
  #         mingw-w64-${{matrix.env}}-python-pytest
  #         mingw-w64-${{matrix.env}}-eigen3
  #         mingw-w64-${{matrix.env}}-boost
  #         mingw-w64-${{matrix.env}}-catch

  #   - uses: msys2/setup-msys2@v2
  #     if: matrix.sys == 'mingw64'
  #     with:
  #       msystem: ${{matrix.sys}}
  #       install: >-
  #         git
  #         mingw-w64-${{matrix.env}}-python-scipy

  #   - uses: actions/checkout@v4

  #   - name: Configure C++11
  #     # LTO leads to many undefined reference like
  #     # `pybind11::detail::function_call::function_call(pybind11::detail::function_call&&)
  #     run: >-
  #       cmake -G "MinGW Makefiles" -DCMAKE_CXX_STANDARD=11 -DPYBIND11_WERROR=ON -DDOWNLOAD_CATCH=ON
  #       -DPYTHON_EXECUTABLE=$(python -c "import sys; print(sys.executable)")
  #       -S . -B build

  #   - name: Build C++11
  #     run: cmake --build build -j 2

  #   - name: Python tests C++11
  #     run: cmake --build build --target pytest -j 2

  #   - name: C++11 tests
  #     run: PYTHONHOME=/${{matrix.sys}} PYTHONPATH=/${{matrix.sys}} cmake --build build --target cpptest -j 2

  #   - name: Interface test C++11
  #     run: PYTHONHOME=/${{matrix.sys}} PYTHONPATH=/${{matrix.sys}} cmake --build build --target test_cmake_build

  #   - name: Clean directory
  #     run: git clean -fdx

  #   - name: Configure C++14
  #     run: >-
  #       cmake -G "MinGW Makefiles" -DCMAKE_CXX_STANDARD=14 -DPYBIND11_WERROR=ON -DDOWNLOAD_CATCH=ON
  #       -DPYTHON_EXECUTABLE=$(python -c "import sys; print(sys.executable)")
  #       -S . -B build2

  #   - name: Build C++14
  #     run: cmake --build build2 -j 2

  #   - name: Python tests C++14
  #     run: cmake --build build2 --target pytest -j 2

  #   - name: C++14 tests
  #     run: PYTHONHOME=/${{matrix.sys}} PYTHONPATH=/${{matrix.sys}} cmake --build build2 --target cpptest -j 2

  #   - name: Interface test C++14
  #     run: PYTHONHOME=/${{matrix.sys}} PYTHONPATH=/${{matrix.sys}} cmake --build build2 --target test_cmake_build

  #   - name: Clean directory
  #     run: git clean -fdx

  #   - name: Configure C++17
  #     run: >-
  #       cmake -G "MinGW Makefiles" -DCMAKE_CXX_STANDARD=17 -DPYBIND11_WERROR=ON -DDOWNLOAD_CATCH=ON
  #       -DPYTHON_EXECUTABLE=$(python -c "import sys; print(sys.executable)")
  #       -S . -B build3

  #   - name: Build C++17
  #     run: cmake --build build3 -j 2

  #   - name: Python tests C++17
  #     run: cmake --build build3 --target pytest -j 2

  #   - name: C++17 tests
  #     run: PYTHONHOME=/${{matrix.sys}} PYTHONPATH=/${{matrix.sys}} cmake --build build3 --target cpptest -j 2

  #   - name: Interface test C++17
  #     run: PYTHONHOME=/${{matrix.sys}} PYTHONPATH=/${{matrix.sys}} cmake --build build3 --target test_cmake_build

  # windows_clang:

  #   strategy:
  #     matrix:
  #       os: [windows-latest]
  #       python: ['3.10']

  #   runs-on: "${{ matrix.os }}"

  #   name: "🐍 ${{ matrix.python }} • ${{ matrix.os }} • clang-latest"

  #   steps:
  #     - name: Show env
  #       run: env

  #     - name: Checkout
  #       uses: actions/checkout@v3

  #     - name: Set up Clang
  #       uses: egor-tensin/setup-clang@v1

  #     - name: Setup Python ${{ matrix.python }}
  #       uses: actions/setup-python@v5
  #       with:
  #         python-version: ${{ matrix.python }}

  #     - name: Update CMake
  #       uses: jwlawson/actions-setup-cmake@v2.0

  #     - name: Install ninja-build tool
  #       uses: seanmiddleditch/gha-setup-ninja@v4

  #     - name: Run pip installs
  #       run: |
  #         python -m pip install --upgrade pip
  #         python -m pip install -r tests/requirements.txt

  #     - name: Show Clang++ version
  #       run: clang++ --version

  #     - name: Show CMake version
  #       run: cmake --version

  #     # TODO: WERROR=ON
  #     - name: Configure Clang
  #       run: >
  #         cmake -G Ninja -S . -B .
  #         -DPYBIND11_WERROR=OFF
  #         -DPYBIND11_SIMPLE_GIL_MANAGEMENT=OFF
  #         -DDOWNLOAD_CATCH=ON
  #         -DDOWNLOAD_EIGEN=ON
  #         -DCMAKE_CXX_COMPILER=clang++
  #         -DCMAKE_CXX_STANDARD=17

  #     - name: Build
  #       run: cmake --build . -j 2

  #     - name: Python tests
  #       run: cmake --build . --target pytest -j 2

  #     - name: C++ tests
  #       run: cmake --build . --target cpptest -j 2

  #     - name: Interface test
  #       run: cmake --build . --target test_cmake_build -j 2

  #     - name: Clean directory
  #       run: git clean -fdx

  macos_brew_install_llvm:
    name: "macos-latest • brew install llvm"
    runs-on: macos-latest

    env:
      # https://apple.stackexchange.com/questions/227026/how-to-install-recent-clang-with-homebrew
      LDFLAGS: '-L/usr/local/opt/llvm/lib -Wl,-rpath,/usr/local/opt/llvm/lib'

    steps:
      - name: Update PATH
        run: echo "/usr/local/opt/llvm/bin" >> $GITHUB_PATH

      - name: Show env
        run: env

      - name: Checkout
        uses: actions/checkout@v4

      - name: Show Clang++ version before brew install llvm
        run: clang++ --version

      - name: brew install llvm
        run: brew install llvm

      - name: Show Clang++ version after brew install llvm
        run: clang++ --version

      - name: Update CMake
        uses: jwlawson/actions-setup-cmake@v2.0

      - name: Run pip installs
        run: |
          python3 -m pip install --upgrade pip
          python3 -m pip install -r tests/requirements.txt
          python3 -m pip install numpy
          python3 -m pip install scipy

      - name: Show CMake version
        run: cmake --version

      - name: CMake Configure
        run: >
          cmake -S . -B .
          -DPYBIND11_WERROR=ON
          -DPYBIND11_SIMPLE_GIL_MANAGEMENT=OFF
          -DDOWNLOAD_CATCH=ON
          -DDOWNLOAD_EIGEN=ON
          -DCMAKE_CXX_COMPILER=clang++
          -DCMAKE_CXX_STANDARD=17
          -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")

      - name: Build
        run: cmake --build . -j 2

      - name: Python tests
        run: cmake --build . --target pytest -j 2

      - name: C++ tests
        run: cmake --build . --target cpptest -j 2

      - name: Interface test
        run: cmake --build . --target test_cmake_build -j 2

      - name: CMake Configure - Exercise cmake -DPYBIND11_TEST_OVERRIDE
        run: >
          cmake -S . -B build_partial
          -DPYBIND11_WERROR=ON
          -DPYBIND11_SIMPLE_GIL_MANAGEMENT=OFF
          -DDOWNLOAD_CATCH=ON
          -DDOWNLOAD_EIGEN=ON
          -DCMAKE_CXX_COMPILER=clang++
          -DCMAKE_CXX_STANDARD=17
          -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)")
          "-DPYBIND11_TEST_OVERRIDE=test_call_policies.cpp;test_gil_scoped.cpp;test_thread.cpp"

      - name: Build - Exercise cmake -DPYBIND11_TEST_OVERRIDE
        run: cmake --build build_partial -j 2

      - name: Python tests - Exercise cmake -DPYBIND11_TEST_OVERRIDE
        run: cmake --build build_partial --target pytest -j 2

      - name: Clean directory
        run: git clean -fdx