name: C/C++ CI

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

jobs:
  build:
    name: CMake Build & Test
    runs-on: ${{ matrix.os }}
    
    strategy:
      matrix:
        os: [ubuntu-latest, ubuntu-20.04, windows-latest, windows-2019, macos-11, macos-13]
        build_type: [Release, Debug]
        cpp_compiler: [g++, clang++, cl]
        include:
          - os: windows-latest
            cpp_compiler: cl
            c_compiler: cl
          - os: windows-2019
            cpp_compiler: cl
            c_compiler: cl
          - os: ubuntu-latest
            cpp_compiler: g++
            c_compiler: gcc
          - os: ubuntu-latest
            cpp_compiler: clang++
            c_compiler: clang
          - os: ubuntu-20.04
            cpp_compiler: g++
            c_compiler: gcc
          - os: ubuntu-20.04
            cpp_compiler: clang++
            c_compiler: clang
          - os: macos-11
            cpp_compiler: g++
            c_compiler: gcc
          - os: macos-11
            cpp_compiler: clang++
            c_compiler: clang
          - os: macos-13
            cpp_compiler: g++
            c_compiler: gcc
          - os: macos-13
            cpp_compiler: clang++
            c_compiler: clang
        exclude:
          - os: windows-latest
            cpp_compiler: g++
          - os: windows-latest
            cpp_compiler: clang++
          - os: windows-2019
            cpp_compiler: g++
          - os: windows-2019
            cpp_compiler: clang++
          - os: ubuntu-latest
            cpp_compiler: cl
          - os: ubuntu-20.04
            cpp_compiler: cl
          - os: macos-11
            cpp_compiler: cl
          - os: macos-11
            cpp_compiler: cl
          - os: macos-13
            cpp_compiler: cl
          - os: macos-13
            cpp_compiler: cl

    steps:
    - uses: actions/checkout@v4
    
    - name: Set reusable strings
      # Turn repeated input strings (such as the build output directory) into step outputs. These step outputs can be used throughout the workflow file.
      id: strings
      shell: bash
      run: |
        echo "build-output-dir=${{ github.workspace }}/build/${{ matrix.build_type }}/${{ matrix.cpp_compiler }}" >> "$GITHUB_OUTPUT"

    - name: Configure CMake
      run: >
        cmake -B ${{ steps.strings.outputs.build-output-dir }}
        -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }}
        -DCMAKE_C_COMPILER=${{ matrix.c_compiler }}
        -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
        -DELFIO_BUILD_EXAMPLES=YES -DELFIO_BUILD_TESTS=YES
        -S ${{ github.workspace }}
    
    - name: Build
      run: cmake --build ${{ steps.strings.outputs.build-output-dir }} --config ${{ matrix.build_type }}
    
    - name: Test
      working-directory: ${{ steps.strings.outputs.build-output-dir }}
      run: ctest --build-config ${{ matrix.build_type }}