build-dawn.yml

name: Build Dawn

on: workflow_dispatch

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  DAWN_BRANCH: chromium/7770  # Configure the Dawn branch to checkout

jobs:
  prepare-release:
    runs-on: ubuntu-latest
    outputs:
      dawn_branch: ${{ steps.dawn_meta.outputs.branch }}
      dawn_branch_slug: ${{ steps.dawn_meta.outputs.branch_slug }}
      tag_name: ${{ steps.release_meta.outputs.tag_name }}
      release_name: ${{ steps.release_meta.outputs.release_name }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6.0.2

      - name: Determine Dawn branch metadata
        id: dawn_meta
        run: |
          set -eo pipefail
          branch="${DAWN_BRANCH}"
          # Convert slashes to hyphens for tag-safe slug
          slug=${branch//\//-}
          echo "branch=$branch" >> "$GITHUB_OUTPUT"
          echo "branch_slug=$slug" >> "$GITHUB_OUTPUT"
        env:
          DAWN_BRANCH: ${{ env.DAWN_BRANCH }}

      - name: Compute release metadata
        id: release_meta
        run: |
          tag="dawn-${DAWN_BRANCH_SLUG}"
          echo "tag_name=$tag" >> "$GITHUB_OUTPUT"
          echo "release_name=Dawn ${DAWN_BRANCH}" >> "$GITHUB_OUTPUT"
        env:
          DAWN_BRANCH: ${{ steps.dawn_meta.outputs.branch }}
          DAWN_BRANCH_SLUG: ${{ steps.dawn_meta.outputs.branch_slug }}

      - name: Create GitHub release
        id: create_release
        uses: softprops/action-gh-release@b4309332981a82ec1c5618f44dd2e27cc8bfbfda # v3.0.0
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ steps.release_meta.outputs.tag_name }}
          name: ${{ steps.release_meta.outputs.release_name }}
          body: "Dawn prebuilt binaries for version ${{ steps.dawn_meta.outputs.branch }}"
          draft: false
          prerelease: true
          generate_release_notes: false

  mobile-android:
    needs: prepare-release
    strategy:
      fail-fast: false
      matrix:
        include:
          # Android builds
          - arch: arm64-v8a
            toolchain_file: $ANDROID_NDK/build/cmake/android.toolchain.cmake
            cmake_args: -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=android-26
            output_dir: externals/dawn/out/android_arm64-v8a
            library_path: src/dawn/native/libwebgpu_dawn.so
            strip_tool: $ANDROID_NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip
          - arch: armeabi-v7a
            toolchain_file: $ANDROID_NDK/build/cmake/android.toolchain.cmake
            cmake_args: -DANDROID_ABI=armeabi-v7a -DANDROID_PLATFORM=android-26
            output_dir: externals/dawn/out/android_armeabi-v7a
            library_path: src/dawn/native/libwebgpu_dawn.so
            strip_tool: $ANDROID_NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip
          - arch: x86
            toolchain_file: $ANDROID_NDK/build/cmake/android.toolchain.cmake
            cmake_args: -DANDROID_ABI=x86 -DANDROID_PLATFORM=android-26
            output_dir: externals/dawn/out/android_x86
            library_path: src/dawn/native/libwebgpu_dawn.so
            strip_tool: $ANDROID_NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip
          - arch: x86_64
            toolchain_file: $ANDROID_NDK/build/cmake/android.toolchain.cmake
            cmake_args: -DANDROID_ABI=x86_64 -DANDROID_PLATFORM=android-26
            output_dir: externals/dawn/out/android_x86_64
            library_path: src/dawn/native/libwebgpu_dawn.so
            strip_tool: $ANDROID_NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip

    name: Build-android-${{ matrix.arch }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout main repository
        uses: actions/checkout@v6.0.2

      - name: Checkout Dawn repository
        run: |
          git clone --depth 1 --branch ${{ env.DAWN_BRANCH }} https://dawn.googlesource.com/dawn externals/dawn

      - name: Setup Android NDK
        id: setup-ndk
        uses: nttld/setup-ndk@ed92fe6cadad69be94a966a7ee3271275e62f779 # v1.6.0
        with:
          ndk-version: r27d

      - name: Set ANDROID_NDK
        run: echo "ANDROID_NDK=${{ steps.setup-ndk.outputs.ndk-path }}" >> $GITHUB_ENV

      - name: Build android ${{ matrix.arch }}
        run: |
          cmake -S externals/dawn -B ${{ matrix.output_dir }} -G Ninja \
            -DDAWN_MOBILE_BUILD=android \
            -C externals/dawn/.github/workflows/dawn-ci.cmake \
            -DCMAKE_TOOLCHAIN_FILE=${{ matrix.toolchain_file }} \
            ${{ matrix.cmake_args }} \
            -DCMAKE_BUILD_TYPE=Release \
            -DBUILD_SHARED_LIBS=OFF \
            -DDAWN_BUILD_MONOLITHIC_LIBRARY=SHARED \
            -DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON \
            -DCMAKE_EXE_LINKER_FLAGS="-llog" \
            -DCMAKE_SHARED_LINKER_FLAGS="-llog -Wl,-z,max-page-size=16384"
          ninja -C ${{ matrix.output_dir }}
      - name: Strip Android binaries
        run: |
          ${{ matrix.strip_tool }} ${{ matrix.output_dir }}/${{ matrix.library_path }}

      - name: Upload build artifacts
        uses: actions/upload-artifact@v7
        with:
          name: build-android-${{ matrix.arch }}
          path: ${{ matrix.output_dir }}/${{ matrix.library_path }}

      - name: Install headers (from arm64-v8a build only)
        if: matrix.arch == 'arm64-v8a'
        run: |
          cmake --install ${{ matrix.output_dir }} --prefix dawn-headers

      - name: Upload headers (from arm64-v8a build only)
        if: matrix.arch == 'arm64-v8a'
        uses: actions/upload-artifact@v7
        with:
          name: dawn-headers
          path: dawn-headers/

  mobile-apple:
    needs: prepare-release
    strategy:
      fail-fast: false
      matrix:
        include:
          # Apple builds
          - platform: ios
            arch: arm64
            cmake_args: -DPLATFORM=OS64 -DDEPLOYMENT_TARGET=14.0 -DENABLE_BITCODE=OFF -DENABLE_ARC=OFF -DENABLE_VISIBILITY=OFF
            output_dir: externals/dawn/out/ios_arm64
            library_path: src/dawn/native/libwebgpu_dawn.a
          - platform: ios
            arch: sim_arm64
            cmake_args: -DPLATFORM=SIMULATORARM64 -DDEPLOYMENT_TARGET=14.0 -DENABLE_BITCODE=OFF -DENABLE_ARC=OFF -DENABLE_VISIBILITY=OFF
            output_dir: externals/dawn/out/ios_sim_arm64
            library_path: src/dawn/native/libwebgpu_dawn.a
          - platform: ios
            arch: sim_x86_64
            cmake_args: -DPLATFORM=SIMULATOR64 -DDEPLOYMENT_TARGET=14.0 -DENABLE_BITCODE=OFF -DENABLE_ARC=OFF -DENABLE_VISIBILITY=OFF
            output_dir: externals/dawn/out/ios_sim_x86_64
            library_path: src/dawn/native/libwebgpu_dawn.a
          - platform: macos
            arch: universal
            cmake_args: -DPLATFORM=MAC_UNIVERSAL -DDEPLOYMENT_TARGET=11.0 -DENABLE_BITCODE=OFF -DENABLE_ARC=OFF -DENABLE_VISIBILITY=OFF
            output_dir: externals/dawn/out/macos_universal
            library_path: src/dawn/native/libwebgpu_dawn.a

    name: Build-${{ matrix.platform }}-${{ matrix.arch }}
    runs-on: macos-latest-large
    steps:
      - name: Checkout main repository
        uses: actions/checkout@v6.0.2

      - name: Checkout Dawn repository
        run: |
          git clone --depth 1 --branch ${{ env.DAWN_BRANCH }} https://dawn.googlesource.com/dawn externals/dawn
#          submodules: true

      - name: Setup Xcode
        uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90 # v1.7.0
        with:
          xcode-version: latest-stable

      - name: Download Apple toolchain
        run: |
          mkdir -p externals/dawn/build-tools
          # Download the ios-cmake toolchain file
          curl -L https://raw.githubusercontent.com/leetal/ios-cmake/6fa909e133b92343db2d099e0478448c05ffec1a/ios.toolchain.cmake -o externals/dawn/build-tools/apple.toolchain.cmake

      - name: Build ${{ matrix.platform }} ${{ matrix.arch }}
        run: |
          cmake -S externals/dawn -B ${{ matrix.output_dir }} -G Ninja \
            -DDAWN_MOBILE_BUILD=apple \
            -C externals/dawn/.github/workflows/dawn-ci.cmake \
            -DCMAKE_TOOLCHAIN_FILE=build-tools/apple.toolchain.cmake \
            ${{ matrix.cmake_args }} \
            -DCMAKE_BUILD_TYPE=Release
          ninja -C ${{ matrix.output_dir }}
      - name: Upload build artifacts
        uses: actions/upload-artifact@v7
        with:
          name: build-${{ matrix.platform }}-${{ matrix.arch }}
          path: ${{ matrix.output_dir }}/${{ matrix.library_path }}

  package-mobile:
    name: Package Mobile Artifacts
    runs-on: macos-latest
    needs: [prepare-release, mobile-android, mobile-apple]
    steps:
      - name: Checkout main repository
        uses: actions/checkout@v6.0.2

      - name: Download all build artifacts
        uses: actions/download-artifact@v8
        with:
          pattern: build-*
          path: artifacts

      - name: Download headers
        uses: actions/download-artifact@v8
        with:
          name: dawn-headers
          path: dawn-headers

      - name: Create iOS Simulator fat binary
        run: |
          mkdir -p libs/apple/iphonesimulator
          lipo -create \
            artifacts/build-ios-sim_x86_64/libwebgpu_dawn.a \
            artifacts/build-ios-sim_arm64/libwebgpu_dawn.a \
            -output libs/apple/iphonesimulator/libwebgpu_dawn.a

      - name: Create XCFramework
        run: |
          xcodebuild -create-xcframework \
            -library libs/apple/iphonesimulator/libwebgpu_dawn.a \
            -library artifacts/build-ios-arm64/libwebgpu_dawn.a \
            -library artifacts/build-macos-universal/libwebgpu_dawn.a \
            -output dawn-apple.xcframework

      - name: Package Android libraries
        run: |
          mkdir -p dawn-android/arm64-v8a
          mkdir -p dawn-android/armeabi-v7a
          mkdir -p dawn-android/x86
          mkdir -p dawn-android/x86_64
          cp artifacts/build-android-arm64-v8a/libwebgpu_dawn.so dawn-android/arm64-v8a/
          cp artifacts/build-android-armeabi-v7a/libwebgpu_dawn.so dawn-android/armeabi-v7a/
          cp artifacts/build-android-x86/libwebgpu_dawn.so dawn-android/x86/
          cp artifacts/build-android-x86_64/libwebgpu_dawn.so dawn-android/x86_64/

      - name: Create archives
        run: |
          TAG="${{ needs.prepare-release.outputs.tag_name }}"
          tar -czf dawn-android-${TAG}.tar.gz dawn-android
          tar -czf dawn-apple-${TAG}.xcframework.tar.gz dawn-apple.xcframework
          tar -czf dawn-headers-${TAG}.tar.gz dawn-headers

      - name: Upload to GitHub release
        uses: softprops/action-gh-release@b4309332981a82ec1c5618f44dd2e27cc8bfbfda # v3.0.0
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ needs.prepare-release.outputs.tag_name }}
          files: |
            dawn-android-${{ needs.prepare-release.outputs.tag_name }}.tar.gz
            dawn-apple-${{ needs.prepare-release.outputs.tag_name }}.xcframework.tar.gz
            dawn-headers-${{ needs.prepare-release.outputs.tag_name }}.tar.gz
          prerelease: true