name: CI

on: [push, pull_request]

jobs:
  build:
    name: ${{ matrix.name }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        # Useful info: https://help.github.com/en/articles/workflow-syntax-for-github-actions
        include:
          - name: ubuntu-clang
            os: ubuntu-16.04
            compiler: clang
          - name: windows-clang
            os: windows-2019
            compiler: clang-cl
          - name: macos-clang
            os: macos-10.15
            compiler: clang
    steps:
    - name: Configure Git
      # We add -l to process .bashrc, but need -e -o pipefail for consistency with GitHub Actions's default behavior.
      shell: bash -e -o pipefail -l {0}
      run: |
        git config --global core.symlinks true && git config --global core.autocrlf false
        if command -v dpkg > /dev/null; then sudo dpkg-reconfigure debconf -f noninteractive -p high; fi
    - name: Checkout repository
      uses: actions/checkout@v2
      with:
        fetch-depth: 1
    - name: Setup Bazel
      shell: bash -e -o pipefail -l {0}
      env:
        BAZEL_CACHE_CREDENTIAL_B64: ${{ secrets.BAZEL_CACHE_CREDENTIAL_B64 }}
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      run: ./ci/travis/install-bazel.sh
    - name: Install C/C++ toolchains
      shell: bash -e -o pipefail -l {0}
      env:
        CC: ${{ matrix.compiler }}
      run: ./ci/travis/install-toolchains.sh "${CC%%-*}"
    - name: Install MSYS2 (only needed if some shell commands are missing)
      if: false && runner.os == 'Windows'
      uses: numworks/setup-msys2@v1
      with:
        update: false
    - name: Perform build
      shell: bash -e -o pipefail -l {0}
      run: |
        bazel build \
          --keep_going \
          "//:*"
    - name: Run Clang Include-What-You-Use
      continue-on-error: true
      if: runner.os == 'Linux'
      shell: bash -e -o pipefail -l {0}
      run: |
        sudo apt-get install -qq -o=Dpkg::Use-Pty=0 iwyu
        bazel build \
          --keep_going \
          --config=iwyu \
          "//:*"