name: build

on:
  push:
  pull_request:

jobs:
  build:
    name: ${{ matrix.name }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - { name: linux-gcc,      os: ubuntu-latest,  cc: gcc,   cxx: g++ }
          - { name: linux-clang,    os: ubuntu-latest,  cc: clang, cxx: clang++ }
          - { name: windows-msvc,   os: windows-latest }
          - { name: windows-mingw,  os: windows-latest, generator: MinGW Makefiles, cc: gcc, cxx: g++ }
          - { name: macos-clang,    os: macos-latest }
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: '17'

      - name: Configure
        shell: bash
        run: |
          args=(-B build -DCMAKE_BUILD_TYPE=Release -DANTLRLAB_DOWNLOAD_JAR=ON)
          if [ -n "${{ matrix.generator }}" ]; then args+=(-G "${{ matrix.generator }}"); fi
          if [ -n "${{ matrix.cc }}" ]; then args+=(-DCMAKE_C_COMPILER=${{ matrix.cc }} -DCMAKE_CXX_COMPILER=${{ matrix.cxx }}); fi
          cmake "${args[@]}"

      - name: Build
        run: cmake --build build --config Release --parallel

      - name: Self-test and examples
        shell: bash
        run: |
          BIN=$(find build -type f \( -name antlrlab -o -name antlrlab.exe \) -not -path '*/CMakeFiles/*' | head -n 1)
          echo "using $BIN"
          "$BIN" --version
          "$BIN" --selftest
          "$BIN" examples/combined/Expr.g4 -t "1 + 2" --no-color
          "$BIN" -g examples/split/CalcLexer.g4 -g examples/split/CalcParser.g4 -i examples/split/input.txt -q --no-color
          "$BIN" examples/json/JSON.g4 examples/json/example.json -q --no-color
          # a syntax error must give exit status 1
          set +e
          "$BIN" examples/combined/Expr.g4 examples/combined/input_bad.txt -q --no-color
          test $? -eq 1