name: CI

on:
  workflow_dispatch:
  pull_request:
  push:
    branches:
      - master
      - stable
      - v*

jobs:
  standard:
    strategy:
      fail-fast: false
      matrix:
        runs-on: [ubuntu-latest, windows-latest, macos-latest]
        arch: [x64]
        max-cxx-std: [17]
        python:
        - 2.7
        - 3.5
        - 3.8
        - 3.9-dev
        - pypy2
        - pypy3

        include:
          - runs-on: ubuntu-latest
            python: 3.6
            arch: x64
            max-cxx-std: 17
          - runs-on: macos-latest
            python: 3.7
            arch: x64
            max-cxx-std: 17
          - runs-on: windows-2016
            python: 3.7
            arch: x86
            max-cxx-std: 14

        exclude:
            # Currently 32bit only, and we build 64bit
          - runs-on: windows-latest
            python: pypy2
            arch: x64
            max-cxx-std: 17
          - runs-on: windows-latest
            python: pypy3
            arch: x64
            max-cxx-std: 17

            # Currently can't build due to warning, fixed in CPython > 3.9b5
          - runs-on: macos-latest
            python: 3.9-dev
            arch: x64
            max-cxx-std: 17

            # Currently broken on embed_test
          - runs-on: windows-latest
            python: 3.8
            arch: x64
            max-cxx-std: 17
          - runs-on: windows-latest
            python: 3.9-dev
            arch: x64
            max-cxx-std: 17

    name: "🐍 ${{ matrix.python }} • ${{ matrix.runs-on }} • ${{ matrix.arch }}"
    runs-on: ${{ matrix.runs-on }}

    steps:
    - uses: actions/checkout@v2

    - name: Setup Python ${{ matrix.python }}
      uses: actions/setup-python@v2
      with:
        python-version: ${{ matrix.python }}
        architecture: ${{ matrix.arch }}

    - name: Cache wheels
      if: startsWith(runner.os, 'macOS')
      uses: actions/cache@v2
      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 }}-${{ matrix.arch }}-${{ hashFiles('tests/requirements.txt') }}

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

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

    - 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: cmake --build build --target cpptest -j 2

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

    - name: Configure C++${{ matrix.max-cxx-std }}
      shell: bash
      run: >
        cmake -S . -B build2
        -DPYBIND11_WERROR=ON
        -DDOWNLOAD_CATCH=ON
        -DDOWNLOAD_EIGEN=ON
        -DCMAKE_CXX_STANDARD=${{ matrix.max-cxx-std }}
        -DPYTHON_EXECUTABLE=$(python -c "import sys; print(sys.executable)")

    - name: Build C++${{ matrix.max-cxx-std }}
      run: cmake --build build2 -j 2

    - name: Python tests C++${{ matrix.max-cxx-std }}
      run: cmake --build build2 --target pytest

    - name: C++${{ matrix.max-cxx-std }} tests
      run: cmake --build build2 --target cpptest

    - name: Interface test C++${{ matrix.max-cxx-std }}
      run: cmake --build build2 --target test_cmake_build

  clang:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        clang:
          - 3.6
          - 3.7
          - 3.9
          - 5
          - 7
          - 9
          - dev

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

    steps:
    - uses: actions/checkout@v2

    - 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
        -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

  gcc:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        gcc:
          - 7
          - latest

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

    steps:
    - uses: actions/checkout@v1

    - 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: Setup CMake 3.18
      uses: jwlawson/actions-setup-cmake@v1.3
      with:
        cmake-version: 3.18

    - name: Configure
      shell: bash
      run: >
        cmake -S . -B build
        -DPYBIND11_WERROR=ON
        -DDOWNLOAD_CATCH=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

  centos:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        centos:
          - 7  # GCC 4.8
          - 8

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

    steps:
    - uses: actions/checkout@v2

    - name: Add Python 3
      run: yum update -y && yum 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: Configure
      shell: bash
      run: >
        cmake -S . -B build
        -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

  install-classic:
    name: "🐍 3.5 • Debian • x86 •  Install"
    runs-on: ubuntu-latest
    container: i386/debian:stretch

    steps:
    - uses: actions/checkout@v1

    - name: Install requirements
      run: |
        apt-get update
        apt-get install -y git make cmake g++ libeigen3-dev python3-dev python3-pip python3-pytest

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

    - 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 -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)") ../pybind11-tests -DPYBIND11_WERROR=ON
      working-directory: /build-tests

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


  doxygen:
    name: "Documentation build test"
    runs-on: ubuntu-latest
    container: alpine:3.12

    steps:
    - uses: actions/checkout@v2

    - name: Install requirements
      run: apk add doxygen python3-dev

    - name: Ensure pip
      run: python3 -m ensurepip

    - name: Install python docs requirements
      run: python3 -m pip install "sphinx<3" sphinx_rtd_theme breathe==4.13.1 pytest setuptools

    - name: Build docs
      run: python3 -m sphinx -W -b html docs docs/.build

    - name: Make SDist
      run: python3 setup.py sdist

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