name: CMake

on: [push, pull_request]

jobs:
  build:
    # Skip building pull requests from the same repository
    if: ${{ github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository) }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [windows-2019, macos-10.15, ubuntu-20.04]
    env:
      BUILD_TYPE: Release
    steps:
    - name: Checkout
      uses: actions/checkout@v2

    - name: Tag cmkr.cmake
      if: ${{ startsWith(github.ref, 'refs/tags/') }}
      run: cmake -P "cmake/replace_tag.cmake"

    - name: Build
      run: |
        cmake -B build -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }} -DCMAKE_UNITY_BUILD=ON
        cmake --build build --config ${{ env.BUILD_TYPE }} --parallel
        cmake --install build --prefix ./install --config ${{ env.BUILD_TYPE }}

    - name: Check if cmkr was run
      run: |
        ./install/bin/cmkr gen
        git diff --exit-code -- . ":(exclude)cmake/cmkr.cmake"

    - name: Test
      run: |
        cd build/tests
        ctest -C ${{ env.BUILD_TYPE }}

    - name: Upload artifacts
      uses: actions/upload-artifact@v2
      with:
        name: ${{ github.event.repository.name }}-${{ matrix.os }}
        path: install/bin/*

    - name: Get lowercase OS name
      id: osname
      uses: ASzc/change-string-case-action@v1
      with:
        string: ${{ runner.os }}

    - name: Compress artifacts
      uses: papeloto/action-zip@v1
      with:
        files: install/bin/
        dest: ${{ github.event.repository.name }}-${{ steps.osname.outputs.lowercase }}.zip

    - name: Release
      uses: softprops/action-gh-release@v1
      if: ${{ startsWith(github.ref, 'refs/tags/') }}
      with:
        prerelease: ${{ !startsWith(github.ref, 'refs/tags/v') || contains(github.ref, '-pre') }}
        files: ${{ github.event.repository.name }}-${{ steps.osname.outputs.lowercase }}.zip
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}