docker-image.yml

name: Create and publish SHACL API Docker image

on:
  release:
    type: [published]
  push:
    branches: [master]

env:
  REGISTRY: ghcr.io

jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    strategy:
      matrix:
        include:
          - platform: linux/amd64
            base: eclipse-temurin:11-alpine
          - platform: linux/arm64
            base: amazoncorretto:11-alpine3.18-jdk

    steps:
      - name: lowercase image name
        run: |
          echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
          
      - name: Checkout repository
        uses: actions/checkout@v3

        # https://github.com/docker/setup-qemu-action
      - name: Set up QEMU
        uses: docker/setup-qemu-action@e81a89b1732b9c48d79cd809d8d81d79c4647a18 # v2.1.0
        
        # https://github.com/docker/setup-buildx-action
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@15c905b16b06416d2086efa066dd8e3a35cc7f98 # v2.4.0
        
        # inspired by https://github.com/reloc8/action-latest-release-version
      - name: Get release version
        id: get_version
        run: |
          git fetch --tags
          git fetch --prune --unshallow || true
          
          LATEST_RELEASE=$(git describe --abbrev=0 --tags | sed 's/^v//')
          echo "latest-release=${LATEST_RELEASE}" >> $GITHUB_OUTPUT
          echo "version_build=${LATEST_RELEASE}_"$(git rev-parse --short "$GITHUB_SHA") >> $GITHUB_OUTPUT

        # https://github.com/docker/metadata-action
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 #v4.3.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
              type=raw,value=latest,enable=${{ github.event_name == 'push' }}
              type=raw,value=${{ steps.get_version.outputs.version_build}},enable=${{ github.event_name == 'push' }}
              type=raw,value=${{ steps.get_version.outputs.latest-release}},enable=${{ github.event_name == 'release' }}


        # https://github.com/docker/login-action
      - name: Log in to the Container registry
        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2.1.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

        # https://github.com/docker/build-push-action
      - name: Build and push Docker image for x86 and arm64
        id: build
        uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671 #v4.0.0
        with:
          file: .docker/Dockerfile
          push: true
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            VERSION=${{ steps.get_version.outputs.version_build }}
            ARCH_BASE=${{ matrix.base }}
          outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true

        # https://github.com/actions/upload-artifact
      - 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@v3
        with:
          name: digests
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
      runs-on: ubuntu-latest
      needs:
        - build-and-push-image
      steps:
        - name: lowercase image name
          run: |
            echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
        
        - name: Checkout repository
          uses: actions/checkout@v3

          # inspired by https://github.com/reloc8/action-latest-release-version
        - name: Get release version
          id: get_version
          run: |
            git fetch --tags
            git fetch --prune --unshallow || true
          
            LATEST_RELEASE=$(git describe --abbrev=0 --tags | sed 's/^v//')
            echo "latest-release=${LATEST_RELEASE}" >> $GITHUB_OUTPUT
            echo "version_build=${LATEST_RELEASE}_"$(git rev-parse --short "$GITHUB_SHA") >> $GITHUB_OUTPUT
          
          # https://github.com/actions/download-artifact
        - name: Download digests
          uses: actions/download-artifact@v3
          with:
            name: digests
            path: /tmp/digests
        - name: Set up Docker Buildx
          uses: docker/setup-buildx-action@v3

          # https://github.com/docker/metadata-action
        - name: Extract metadata (tags, labels) for Docker
          id: meta
          uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 #v4.3.0
          with:
            images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
            tags: |
                type=raw,value=latest,enable=${{ github.event_name == 'push' }}
                type=raw,value=${{ steps.get_version.outputs.version_build}},enable=${{ github.event_name == 'push' }}
                type=raw,value=${{ steps.get_version.outputs.latest-release}},enable=${{ github.event_name == 'release' }}

          # https://github.com/docker/login-action
        - name: Log in to the Container registry
          uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2.1.0
          with:
            registry: ${{ env.REGISTRY }}
            username: ${{ github.actor }}
            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.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)          
        - name: Inspect image
          run: |
            docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}