name: Linux Emscripten

on:
  - pull_request
  - push

jobs:
  build:
    name: Linux Emscripten
    runs-on: ubuntu-latest
    env:
      DOCUMENTATION: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
    steps:
      - uses: actions/checkout@v2
      - uses: seanmiddleditch/gha-setup-ninja@master
      - uses: mymindstorm/setup-emsdk@v7

      - name: Install Doxygen/Graphviz
        if: fromJSON(env.DOCUMENTATION)
        run: |
          sudo apt-get update
          sudo apt-get install doxygen graphviz

      - name: Build
        run: |
          emcmake cmake -G Ninja -DCMAKE_BUILD_TYPE=Release -S . -B build
          cmake --build build

      - name: Build documentation
        if: fromJSON(env.DOCUMENTATION)
        run: |
          cd build
          cmake --build . --target doc
          # Copy emscripten built examples to the doxygen output directory for deployment
          rsync -amv --include='*/' --include='*.html' --include='*.js' --include='*.wasm' --exclude='*' examples doc/doxygen/html

      # Deploy the HTML documentation to GitHub Pages
      - name: GH Pages Deployment
        if: fromJSON(env.DOCUMENTATION)
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: build/doc/doxygen/html/
          enable_jekyll: false
          allow_empty_commit: false
          force_orphan: true
          publish_branch: gh-pages