name: CI

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

jobs:
  standard:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu, windows, macos]
        python:
        - 2.7
        - 3.5
        - 3.8
        - 3.9-dev
        - pypy2
        - pypy3

        include:
          - os: ubuntu
            python: 3.6
          - os: macos
            python: 3.7

        exclude:
            # Currently 32bit only, and we build 64bit
          - os: windows
            python: pypy2
          - os: windows
            python: pypy3

            # Currently can't build due to warning, fixed in CPython > 3.9b5
          - os: macos
            python: 3.9-dev

            # Currently broken on embed_test
          - os: windows
            python: 3.8
          - os: windows
            python: 3.9-dev

    name: Python ${{ matrix.python }} on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}-latest

    steps:
    - uses: actions/checkout@v2

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

    - 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: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
        restore-keys: |
          ${{ runner.os }}-pip-

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

    - name: Configure C++11
      shell: bash
      run: >
        cmake --version &&
        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 -v

    - name: C++11 tests
      run: cmake --build build --target cpptest -j 2 -v

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

    - name: Configure C++17
      shell: bash
      run: >
        cmake -S . -B build17
        -DPYBIND17_WERROR=ON
        -DDOWNLOAD_CATCH=ON
        -DDOWNLOAD_EIGEN=ON
        -DCMAKE_CXX_STANDARD=17
        -DPYTHON_EXECUTABLE=$(python -c "import sys; print(sys.executable)")

    - name: Build C++17
      run: cmake --build build17 -j 2

    - name: Python tests C++17
      run: cmake --build build17 --target pytest

    - name: C++17 tests
      run: cmake --build build17 --target cpptest

    - name: Interface test C++17
      run: cmake --build build17 --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: Clang ${{ matrix.clang }}
    container: "silkeh/clang:${{ 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 --version &&
        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 ${{ matrix.gcc }}
    container: "gcc:${{ 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 --version &&
        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 ${{ matrix.centos }}"
    container: "centos:${{ 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 --version &&
        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