protobuf-dockerimage.yml

name: Protobuf Docker Image
on:
  push:
    tags:
      - "**"
    branches:
      - main
  pull_request:
    branches:
      - main
    paths:
      - .github/workflows/protobuf-dockerimage.yml
      - protobuf/Dockerfile
      - protobuf/protoc-wrapper

env:
  DOCKERHUB_SLUG: ghcr.io/lucacome/build-protobuf
  GHCR_SLUG: ghcr.io/lucacome/build-protobuf

jobs:
  build:
    runs-on: ubuntu-latest
    services:
      registry:
        image: registry:2
        ports:
          - 5000:5000
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64
    steps:
      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: Checkout
        uses: actions/checkout@v4

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            name=${{ env.DOCKERHUB_SLUG}}
          tags: |
            type=edge
            type=ref,event=pr
            type=semver,pattern={{version}}

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

      - name: Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          driver-opts: network=host

      - name: DockerHub Login
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
        if: github.event_name != 'pull_request'

      - name: Login to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
        # if: github.event_name != 'pull_request'

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          context: "protobuf/."
          cache-from: type=gha,scope=protobuf-${{ env.PLATFORM_PAIR }}
          cache-to: type=gha,scope=protobuf-${{ env.PLATFORM_PAIR }},mode=max
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          annotations: ${{ steps.meta.outputs.annotations }}
          target: protoc_builder
          pull: true
          sbom: true
          provenance: mode=max
          outputs: type=image,name=${{ env.DOCKERHUB_SLUG }},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-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1


  merge:
    runs-on: ubuntu-latest
    # if: github.event_name != 'pull_request'
    needs:
      - build
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true

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

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            name=${{ env.DOCKERHUB_SLUG}}
          tags: |
            type=edge
            type=ref,event=pr
            type=semver,pattern={{version}}

      # - name: Login to Docker Hub
      #   uses: docker/login-action@v3
      #   with:
      #     username: ${{ vars.DOCKERHUB_USERNAME }}
      #     password: ${{ secrets.DOCKERHUB_TOKEN }}

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

      - 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.DOCKERHUB_SLUG }}@sha256:%s ' *)

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