name: CMake Ubuntu

on: [push, pull_request]

env:
  BUILD_TYPE: Release

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-20.04
            compiler: clang
            compiler-version: 11
            ignore-errors: false
          - os: ubuntu-20.04
            compiler: clang
            compiler-version: 10
            ignore-errors: false
          - os: ubuntu-18.04
            compiler: clang
            compiler-version: "6.0"
            # This compiler is supported only on a best-effort basis
            ignore-errors: true
          - os: ubuntu-20.04
            compiler: gcc
            compiler-version: 10
            ignore-errors: false
          - os: ubuntu-20.04
            compiler: gcc
            compiler-version: 9
            ignore-errors: false
          - os: ubuntu-18.04
            compiler: gcc
            compiler-version: 7
            ignore-errors: false
    runs-on: ${{ matrix.os }}
    continue-on-error: ${{ matrix.ignore-errors }}

    steps:
    - uses: actions/checkout@v2

    - name: Install ninja-build tool
      uses: seanmiddleditch/gha-setup-ninja@v3

    - name: Install/configure Clang compiler toolchain
      if: matrix.compiler == 'clang'
      run: |
        sudo apt-get install -qy clang-${{matrix.compiler-version}}
        echo "CXX=clang++-${{matrix.compiler-version}}" >> $GITHUB_ENV
        echo "CC=clang-${{matrix.compiler-version}}" >> $GITHUB_ENV

    - name: Install/configure GCC compiler toolchain
      if: matrix.compiler == 'gcc'
      run: |
        sudo apt-get install -qy g++-${{matrix.compiler-version}}
        echo "CXX=g++-${{matrix.compiler-version}}" >> $GITHUB_ENV
        echo "CC=gcc-${{matrix.compiler-version}}" >> $GITHUB_ENV

    - name: Create Build Environment
      run: |
        pip3 install absl-py clang
        cmake -E make_directory ${{runner.workspace}}/build

    - name: Configure CMake
      working-directory: ${{runner.workspace}}/build
      run: cmake $GITHUB_WORKSPACE -G Ninja -DCMAKE_BUILD_TYPE=$BUILD_TYPE

    - name: Build
      working-directory: ${{runner.workspace}}/build
      run: cmake --build . --config $BUILD_TYPE

    # TODO(cblichmann): Before enabling this, make sure all OSS tests pass
    #- name: Test
    #  working-directory: ${{runner.workspace}}/build
    #  run: ctest -C $BUILD_TYPE