name: Emscripten Build
on: [push, pull_request]

env:
  EM_VERSION: latest
  EM_CACHE_FOLDER: 'emsdk-cache'

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        sdl-version: [2, 3]
    name: Emscripten SDL${{ matrix.sdl-version }}
    steps:

    - uses: actions/checkout@v6
      with:
        submodules: true

    - name: Setup cache
      id: cache-system-libraries
      uses: actions/cache@v5
      with:
        path: ${{env.EM_CACHE_FOLDER}}
        key: ${{env.EM_VERSION}}-${{ runner.os }}

    - name: Setup Emscripten toolchain
      uses: emscripten-core/setup-emsdk@v16
      with:
        version: ${{ env.EM_VERSION }}
        actions-cache-folder: ${{env.EM_CACHE_FOLDER}}

    - name: Work around emscripten-core/emscripten#26534
      run: npm install -g typescript@5

    - name: Build
      run: |
        mkdir -p out/wasm-sdl${{ matrix.sdl-version }}
        cd out/wasm-sdl${{ matrix.sdl-version }}
        emcmake cmake -DCMAKE_BUILD_TYPE=Release \
          -DCMAKE_COMPILE_WARNING_AS_ERROR=YES \
          -DSYSTEM3_SDL_VERSION=${{ matrix.sdl-version }} ../..
        make -j4
        mkdir system3
        mv system3.* system3/

    - name: Upload artifacts
      uses: actions/upload-artifact@v7
      with:
        name: system3-wasm-sdl${{ matrix.sdl-version }}
        path: out/wasm-sdl${{ matrix.sdl-version }}/system3