vcpkg_docker.yml

name: Docker Build Images

# Based on https://docs.docker.com/build/ci/github-actions/multi-platform/#distribute-build-across-multiple-runners

on:
  schedule:
    # Once every Wednesday at 00:00
    - cron: '0 0 * * 3'
  push:
    branches:
      - master
    paths:
      - 'docker/**'
      - '.github/workflows/vcpkg_docker.yml'
  pull_request:
    paths:
      - 'docker/**'
      - '.github/workflows/vcpkg_docker.yml'

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

jobs:
  build:
    runs-on: ubuntu-latest
    env:
      # This needs to be the same as in the `merge` job
      # Also remember to change the 'docker/build.sh' script
      REGISTRY_IMAGE: ghcr.io/lifting-bits/cxx-common/vcpkg-builder-ubuntu-v2
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64
        ubuntu_version:
          - 22.04
          - 24.04
    steps:
      - name: Prepare
        run: |
          platform="${{ matrix.platform }}"
          echo "PLATFORM_PAIR=${platform//\//-}" >> "${GITHUB_ENV}"

      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # BEGIN Copied to the next job
      - name: Generate Tag
        env:
          BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
        run: |
          test_tag=""
          if [[ "${GITHUB_REF}" != "refs/heads/${{ github.event.repository.default_branch }}" ]] ; then
            test_tag="test-${BRANCH_NAME////_}-"
          fi
          echo "TEST_TAG=${test_tag}" >> "${GITHUB_ENV}"

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTERY_IMAGE }}
          flavor: |
            latest=false
          tags: |
            type=raw,value=${{ env.TEST_TAG }}${{ matrix.ubuntu_version }}
      # END Copied to the next job

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v5
        with:
          context: docker
          file: docker/Dockerfile.ubuntu.vcpkg
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ matrix.ubuntu_version }}-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    runs-on: ubuntu-latest
    needs:
      - build
    env:
      # This needs to be the same as in the `build` job
      REGISTRY_IMAGE: ghcr.io/lifting-bits/cxx-common/vcpkg-builder-ubuntu-v2
    strategy:
      fail-fast: false
      matrix:
        ubuntu_version:
          - 22.04
          - 24.04
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-${{ matrix.ubuntu_version }}-*
          merge-multiple: true

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # BEGIN Copied to the previous job
      - name: Generate Tag
        env:
          BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
        run: |
          test_tag=""
          if [[ "${GITHUB_REF}" != "refs/heads/${{ github.event.repository.default_branch }}" ]] ; then
            test_tag="test-${BRANCH_NAME////_}-"
          fi
          echo "TEST_TAG=${test_tag}" >> "${GITHUB_ENV}"

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY_IMAGE }}
          flavor: |
            latest=false
          tags: |
            type=raw,value=${{ env.TEST_TAG }}${{ matrix.ubuntu_version }}
      # END Copied from the previous job

      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}