name: Export projects to Web and deploy to GitHub Pages
on:
  push:
    branches:
      - master

env:
  GODOT_VERSION: 4.3

jobs:
  export-html5:
    if: github.repository == 'godotengine/godot-demo-projects'
    name: Export projects to Web and deploy to GitHub Pages
    runs-on: ubuntu-24.04
    container:
      image: barichello/godot-ci:4.3
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Setup
        run: |
          mkdir -p ~/.local/share/godot/export_templates/
          mv /root/.local/share/godot/export_templates/$GODOT_VERSION.stable ~/.local/share/godot/export_templates/$GODOT_VERSION.stable

      - name: Export projects to Web
        run: |
          apt-get update -qq && apt-get install -qqq imagemagick

          # Don't export Mono demos (not supported yet), demos that can't be run in Web
          # since they're platform-specific or demos that are currently broken in Web.
          # Remember to update `.github/dist/footer.html` when updating the list of excluded demos.
          rm -rf \
            2d/glow/ \
            2d/navigation_mesh_chunks/ \
            2d/physics_tests/ \
            3d/labels_and_texts/ \
            3d/decals/ \
            3d/ik/ \
            3d/navigation_mesh_chunks/ \
            3d/occlusion_culling_mesh_lod/ \
            3d/particles/ \
            3d/physical_light_camera_units/ \
            3d/physics_tests/ \
            3d/variable_rate_shading/ \
            3d/volumetric_fog/ \
            3d/voxel/ \
            audio/bpm_sync/ \
            audio/device_changer/ \
            audio/midi_piano/ \
            audio/spectrum/ \
            compute/ \
            gui/msdf_font/ \
            gui/translation/ \
            loading/runtime_save_load \
            misc/compute_shader_heightmap \
            misc/large_world_coordinates/ \
            misc/matrix_transform/ \
            mobile/android_iap/ \
            mobile/sensors/ \
            mono/ \
            networking/ \
            plugins/ \
            xr/openxr_character_centric_movement \
            xr/openxr_composition_layers \
            xr/openxr_hand_tracking_demo \
            xr/openxr_origin_centric_movement

          for panorama in 3d/material_testers/backgrounds/*.hdr; do
            # Decrease the resolution to get below the 100 MB PCK size limit.
            # Otherwise, the website can't be deployed as files larger than 100 MB
            # can't be pushed to GitHub.
            mogrify -resize 66.667% "$panorama"
          done

          BASEDIR="$PWD"

          # Use absolute paths so that we can `cd` without having to go back to the parent directory manually.
          for demo in */*/; do
            echo ""
            echo ""
            echo "================================================================================"
            echo "Exporting demo $demo..."
            echo "================================================================================"

            mkdir -p "$BASEDIR/.github/dist/$demo"
            cd "$BASEDIR/$demo"

            # Copy an export template preset file configured for Web exporting.
            # This way, we don't have to commit `export_presets.cfg` for each project.
            cp "$BASEDIR/.github/dist/export_presets.cfg" .
            # Enable ETC2 texture importing, which is disabled by default (but required for web exports to work on mobile platforms).
            echo "[rendering]\n\ntextures/vram_compression/import_etc2_astc=true" >> project.godot

            # Enable WebXR Polyfill and WebXR Layers Polyfill for the WebXR demo.
            if [ "$demo" == "xr/webxr/" ]; then
              sed -i 's~^html/head_include=""$~html/head_include="<script src=\\"https://cdn.jsdelivr.net/npm/webxr-polyfill@latest/build/webxr-polyfill.min.js\\"></script>\n<script>\nvar polyfill = new WebXRPolyfill();\n</script>\n<script src=\\"https://cdn.jsdelivr.net/npm/webxr-layers-polyfill@latest/build/webxr-layers-polyfill.min.js\\"></script>\n<script>\nvar layersPolyfill = new WebXRLayersPolyfill();\n</script>"~g' export_presets.cfg
            fi

            godot --verbose --headless --export-release "Web" "$BASEDIR/.github/dist/$demo/index.html"

            # Replace the WASM file with a symbolic link to avoid duplicating files in the pushed branch.
            # (WASM files are identical across projects, but not PCK or HTML/JavaScript files.)
            mv -f "$BASEDIR/.github/dist/$demo/index.wasm" "$BASEDIR/.github/dist/index.wasm"
            # The symlink must be relative as it needs to point to a file within the pushed repository.
            ln -s "../../index.wasm" "$BASEDIR/.github/dist/$demo/index.wasm"

            # Append the demo to the list of demos for the website.
            PROJECT_NAME=$(cat project.godot | grep "config/name" | cut -d '"' -f 2 | tr -d "\n")
            echo "<li><a href='$demo'><img width="64" height="64" src="$demo/index.icon.png" alt=""><p>$PROJECT_NAME</p></a></li>" >> "$BASEDIR/.github/dist/demos.html"
          done

          cat "$BASEDIR/.github/dist/header.html" "$BASEDIR/.github/dist/demos.html" "$BASEDIR/.github/dist/footer.html" > "$BASEDIR/.github/dist/index.html"

          # Clean up files that don't need to be deployed.
          rm -f "$BASEDIR/.github/dist/header.html" "$BASEDIR/.github/dist/demos.html" "$BASEDIR/.github/dist/footer.html" "$BASEDIR/.github/dist/export_presets.cfg"

      # Installing rsync is needed in order to deploy to GitHub Pages. Without it, the build will fail.
      - name: Install rsync 📚
        run: |
          apt-get update -qq && apt-get install -qqq rsync
      - name: Deploy to GitHub Pages 🚀
        uses: JamesIves/github-pages-deploy-action@releases/v4
        with:
          # The folder the action should deploy.
          folder: .github/dist
          # Artifacts are large; don't keep the branch's history.
          single-commit: true