name: Linux Build
on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-26.04
    strategy:
      fail-fast: false
      matrix:
        build-type: ["Debug", "Release"]
        sdl-version: [2, 3]

    name: Linux SDL${{ matrix.sdl-version }} ${{ matrix.build-type }}
    steps:
    - uses: actions/checkout@v6

    - name: Install Deps
      run: |
        sudo apt update
        sudo apt install libfreetype-dev libwebp-dev libportmidi-dev libcjson-dev asciidoctor gettext
        if [ "${{ matrix.sdl-version }}" = 2 ]; then
          sudo apt install libsdl2-dev libsdl2-mixer-dev
        else
          sudo apt install libsdl3-dev
        fi

    - name: Build
      run: |
        cmake -S . -B out/build -DCMAKE_BUILD_TYPE=${{ matrix.build-type }} \
          -DXSYSTEM35_SDL_VERSION=${{ matrix.sdl-version }}
        cmake --build out/build -j4

    - name: Test
      run: ctest --test-dir out/build --output-on-failure

    - name: Verify xsystem35.pot is up to date
      if: matrix.build-type == 'Debug' && matrix.sdl-version == 2
      run: |
        xgettext --default-domain=xsystem35 --directory=. \
          --keyword=_ --keyword=N_ \
          --files-from=po/POTFILES.in \
          --output=/tmp/fresh.pot
        if ! diff <(grep '^msgid' po/xsystem35.pot | sort) \
                  <(grep '^msgid' /tmp/fresh.pot | sort); then
          echo "::error::po/xsystem35.pot is out of date. Build the 'pot' target and commit the changes under po/."
          exit 1
        fi