CI.yml

name: CI

on: [push, pull_request]

jobs:
  Build:
    runs-on: [ubuntu-22.04]

    env:
      FC: gfortran
      GCC_V: 13
      OC_V: 2.10.2

    steps:
    - name: Checkout code
      uses: actions/checkout@v4

    - name: Install fpm
      uses: fortran-lang/setup-fpm@v5
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}

    - name: Setup cache for opencoarrays
      id: cache-opencoarrays
      uses: actions/cache@v4
      with:
        path: "~/apps/OpenCoarrays/"
        key: OC-${{ env.OC_V }}

    - name: Install GFortran
      run: |
        sudo apt update
        sudo apt install -y build-essential gfortran-${GCC_V} g++-${GCC_V} cmake mpich
        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-${GCC_V} 100 \
          --slave /usr/bin/gfortran gfortran /usr/bin/gfortran-${GCC_V} \
          --slave /usr/bin/g++ g++ /usr/bin/g++-${GCC_V}

    - name: Maybe install opencoarrays
      if: steps.cache-opencoarrays.outputs.cache-hit != 'true'
      run: |
        wget https://github.com/sourceryinstitute/OpenCoarrays/releases/download/${OC_V}/OpenCoarrays-${OC_V}.tar.gz
        tar xzvf OpenCoarrays-${OC_V}.tar.gz
        cd OpenCoarrays-${OC_V}
        mkdir -p "~/apps/OpenCoarrays/${OC_V}"
        cmake -S . -B build -DCMAKE_INSTALL_PREFIX="~/apps/OpenCoarrays/${OC_V}"
        cmake --build build -t install -j
        echo "${HOME}/apps/OpenCoarrays/${OC_V}/bin" >> $GITHUB_PATH

    - name: Add to PATH if cache hit
      if: steps.cache-opencoarrays.outputs.cache-hit == 'true'
      run: echo "${HOME}/apps/OpenCoarrays/${OC_V}/bin" >> $GITHUB_PATH

    - name: Build, run, and test
      run: |
        which caf
        caf --show
        # Build the example executable to test the commandline without caf first, since you cannot spawn new MPI jobs from within an MPI job
        fpm run --example get-flag-value -- --input-file some_file_name
        fpm test --compiler caf --runner "cafrun -n 2"