cross-build.yml

---
name: Cross-build ungoogled-chromium

on:
  workflow_dispatch:
    inputs:
      container_image:
        description: Container image for build
        default: chromium-win-cross:latest
      target-cpu:
        description: Target CPU
        type: choice
        options: [x64, x86, arm64]
        default: x64

env:
  ZSTD_NBTHREADS: 0

jobs:

  stage-1:
    runs-on: ubuntu-24.04
    container:
      image: ghcr.io/${{github.repository_owner}}/${{inputs.container_image}}
      options: -v /:/HOST
    steps:

      - name: Free up disk space
        run: cd /HOST && sudo /usr/local/sbin/gh-unburden

      - name: Clone u-c-w Git repository
        uses: actions/checkout@v4
        with:
          submodules: recursive
          fetch-depth: 50
          fetch-tags: true

      - name: Get Chromium version info
        id: chromium
        run: |
          version=$(cat ungoogled-chromium/chromium_version.txt)
          echo "Chromium version: $version"
          echo "version=$version" >> $GITHUB_OUTPUT

      - name: Restore Chromium source tarball download cache
        id: restore-cache
        uses: actions/cache/restore@v4
        with:
          key: chromium-source-${{steps.chromium.outputs.version}}
          path: cross-build/build/download_cache

      - name: Download and/or verify Chromium source tarball
        run: |
          cache=cross-build/build/download_cache
          mkdir -p $cache
          ungoogled-chromium/utils/downloads.py retrieve \
            --ini ungoogled-chromium/downloads.ini \
            --cache $cache \
            --hide-progress-bar
          ls -l $cache

      - name: Save Chromium source tarball download cache
        if: ${{!steps.restore-cache.outputs.cache-hit}}
        uses: actions/cache/save@v4
        with:
          key: chromium-source-${{steps.chromium.outputs.version}}
          path: cross-build/build/download_cache

      - name: Prepare the build
        run: cd cross-build && ./build.sh --ci --${{inputs.target-cpu}}

      - name: Prepare GHCI build strategy
        run: |
          cd cross-build/build/src/out/Default*
          targets=$(cat build.targets)
          $GITHUB_WORKSPACE/skunk-tmp/ghci-strategy.sh 8 $targets

      - name: Delete the download cache
        run: rm -r cross-build/build/download_cache

      - name: Stage 1 build (${{inputs.target-cpu}})
        run: |
          cd cross-build/build/src
          ninja -C out/Default* -f ghci-stage1.ninja ghci-stage1

      - name: Tar up the workspace
        # The "touch" prevents a "tar: .: file changed as we read it" error
        run: |
          touch  stage1.tar.zstd
          tar cf stage1.tar.zstd --zstd --exclude=stage1.tar.zstd .
          ls -lh stage1.tar.zstd

      - name: Save the workspace for stage 2
        uses: actions/upload-artifact@v4
        with:
          name: stage1
          compression-level: 0
          path: stage1.tar.zstd
          if-no-files-found: error
          retention-days: 1

  stage-2:
    needs: [stage-1]
    runs-on: ubuntu-24.04
    strategy:
      matrix:
        part: [part1, part2, part3, part4, part5, part6, part7, part8]
    container:
      image: ghcr.io/${{github.repository_owner}}/${{inputs.container_image}}
      options: -v /:/HOST
    env:
      PART: ${{matrix.part}}
    steps:

      - name: Free up disk space
        run: cd /HOST && sudo /usr/local/sbin/gh-unburden

      - name: Download workspace tarball from stage 1
        uses: actions/download-artifact@v4
        with:
          name: stage1

      # The find/truncate gets rid of the bulk of redundant files under
      # obj/, while keeping them as placeholders to avoid recompilation
      - name: Unpack workspace tarball
        run: |
          tar xf stage1.tar.zstd --zstd
          rm stage1.tar.zstd
          find cross-build/build/src/out/Default*/obj \
            -type f -exec truncate -s 0 {} +

      - name: Stage 2 build (${{matrix.part}}, ${{inputs.target-cpu}})
        run: |
          cd cross-build/build/src
          ninja -C out/Default* -f ghci-stage2.ninja $PART

      - name: Tar up the partial build tree
        run: |
          tar cf stage2-$PART.tar.zstd --zstd cross-build/build/src/out/Default*/obj
          ls -lh stage2-$PART.tar.zstd

      - name: Save the partial tree for stage 3
        uses: actions/upload-artifact@v4
        with:
          name: stage2-${{matrix.part}}
          compression-level: 0
          path: stage2-${{matrix.part}}.tar.zstd
          if-no-files-found: error
          retention-days: 1

  stage-3:
    needs: [stage-2]
    runs-on: ubuntu-24.04
    container:
      image: ghcr.io/${{github.repository_owner}}/${{inputs.container_image}}
      options: -v /:/HOST
    steps:

      - name: Free up disk space
        run: cd /HOST && sudo /usr/local/sbin/gh-unburden

      - name: Download the workspace and partial build tree tarballs
        uses: actions/download-artifact@v4

      - name: Unpack the tarballs
        run: |
          for tarball in \
            stage1/stage1.tar.zstd \
            stage2-part*/stage2-part*.tar.zstd
          do
            echo "Unpacking $tarball ..."
            tar xf $tarball --zstd --skip-old-files
            rm $tarball
          done
          rmdir stage1 stage2-part*

      - name: Stage 3 build (${{inputs.target-cpu}})
        run: cd cross-build && ./build.sh --${{inputs.target-cpu}}

      - name: Archive build outputs
        uses: actions/upload-artifact@v4
        with:
          name: packages
          compression-level: 0
          path: cross-build/build/ungoogled-chromium_*
          if-no-files-found: error

      - name: Archive reproducibility info
        uses: actions/upload-artifact@v4
        with:
          name: reproduce
          compression-level: 9
          path: cross-build/build/MD5SUMS.repro
          if-no-files-found: error

  cleanup:
    if: always()
    needs: [stage-3]
    runs-on: ubuntu-24.04
    permissions:
      actions: write
    steps:
      - name: Delete temporary artifacts
        env:
          GH_TOKEN: ${{github.token}}
        run: |
          gh_api_call()
          {
            gh api $2 $3 \
              -H 'Accept: application/vnd.github+json' \
              -H 'X-GitHub-Api-Version: 2022-11-28' \
              "/repos/$GITHUB_REPOSITORY/actions/$1"
          }
          gh_api_call "runs/$GITHUB_RUN_ID/artifacts" \
          | jq -r '.artifacts[] | (.id|tostring)+"\t"+.name' \
          | grep stage \
          > artifacts.txt || true
          echo "Found $(wc -l < artifacts.txt) artifact(s) to delete."
          while read id name
          do
            echo "Deleting artifact \"$name\" (id=$id)"
            gh_api_call "artifacts/$id" --method DELETE
          done < artifacts.txt

# EOF