gn.yml

# Workflow to build Dawn using GN
name: GN

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  build:
    runs-on: ${{ matrix.os }}

    strategy:
      # Set fail-fast to false to ensure that feedback is delivered for all matrix combinations. Consider changing this to true when your workflow is stable.
      fail-fast: false

      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]

    steps:
    - name: Install Ubuntu build dependencies
      if: matrix.os == 'ubuntu-latest'
      run: |
        sudo apt update
        sudo apt install libgl-dev libx11-xcb-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libxext-dev wayland-protocols libwayland-dev libxkbcommon-dev

    - name: Install depot_tools
      uses: newkdev/setup-depot-tools@v1.0.1

    - uses: actions/checkout@v3

    - name: Set reusable strings
      # Turn repeated input strings (such as the build output directory) into step outputs. These step outputs can be used throughout the workflow file.
      id: strings
      shell: bash
      run: |
        echo "build-output-dir=out/build" >> "$GITHUB_OUTPUT"
        echo "build-key=${{ runner.os }}-${{github.workflow}}" >> "$GITHUB_OUTPUT"

    # Only download workspace artifacts on pull requests. CI builds should start from a fresh state.
    - name: Download workspace artifacts
      uses: dawidd6/action-download-artifact@v2
      if: ${{ github.event_name == 'pull_request' }}
      with:
        workflow: ${{ github.workflow }}
        workflow_conclusion: success
        name: workspace-${{ steps.strings.outputs.build-key }}
        search_artifacts: true
        path: ${{ github.workspace }}/${{ steps.strings.outputs.build-output-dir }}
      continue-on-error: true

    - name: Set up checkout
      run: |
        cp ./scripts/standalone.gclient .gclient

    - name: gclient sync --no-history --shallow
      run: gclient sync --no-history --shallow
      env:
        DEPOT_TOOLS_WIN_TOOLCHAIN: 0

    - name: Set up sccache
      uses: mozilla-actions/sccache-action@v0.0.3

    - name: Generate build files
      shell: bash
      run: |
        mkdir -p ${{ steps.strings.outputs.build-output-dir }}
        cat << EOF >> ${{ steps.strings.outputs.build-output-dir }}/args.gn
        cc_wrapper="sccache"
        is_debug=false
        is_component_build=true
        is_clang=true
        EOF
        gn gen ${{ steps.strings.outputs.build-output-dir }}

      env:
        SCCACHE_GHA_ENABLED: "true"
        DEPOT_TOOLS_WIN_TOOLCHAIN: 0

    - name: Build
      run: autoninja -C ${{ steps.strings.outputs.build-output-dir }}
      env:
        SCCACHE_GHA_ENABLED: "true"
        DEPOT_TOOLS_WIN_TOOLCHAIN: 0

    # Always upload workspace artifacts. Eventually only do this for pushes to main.
    - name: Upload workspace artifacts
      uses: actions/upload-artifact@v3
      with:
        name: workspace-${{ steps.strings.outputs.build-key }}
        path: ${{ github.workspace }}/${{ steps.strings.outputs.build-output-dir }}
        retention-days: 7