release.yml

name: Build and Release Container
on:
  push:
    branches-ignore:
      - 'v*'
    tags:
      - 'v*'

env:
  REGISTRY: ghcr.io

jobs:
  build:
    name: Build Containers
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/arm64
          - linux/amd64
          - linux/s390x
          - linux/ppc64le

    permissions:
      contents: read
      packages: write

    steps:

      - name: Set IMAGE_NAME
        run: |
          echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >>${GITHUB_ENV}

      # Checkout code
      # https://github.com/actions/checkout
      - name: Checkout code
        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0

      # Extract metadata (tags, labels) for Docker
      # If the workflow was triggered from a push, the edge tag will be included.
      # If the workflow was triggered from a release, the latest tag will be included.
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
        with:
          images: |
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=semver,pattern=v{{version}}
            type=sha
            type=edge

      # Set up QEMU
      # https://github.com/docker/setup-qemu-action
      - name: Set up QEMU
        uses: docker/setup-qemu-action@68827325e0b33c7199eb31dd4e31fbe9023e06e3 # v3.0.0

      # Set up BuildKit Docker container builder to be able to build
      # multi-platform images and export cache
      # https://github.com/docker/setup-buildx-action
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0

      # Login to Docker registry
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Build and push Docker image with Buildx
      # https://github.com/docker/build-push-action
      - name: Build and push Docker image
        id: build
        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
        with:
          context: .
          platforms: ${{ matrix.platform }}
          labels: ${{ env.DOCKER_METADATA_OUTPUT_LABELS }}
          push: true
          outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true

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

      # Upload digest
      - name: Upload digest
        uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # v3.1.3
        with:
          name: digests
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    name: Merge Container Manifests
    runs-on: ubuntu-latest
    needs:
      - build
    steps:
      - name: Set IMAGE_NAME
        run: |
          echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >>${GITHUB_ENV}

      # Download digests
      # https://github.com/actions/download-artifact
      - name: Download digests
        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2
        with:
          name: digests
          path: /tmp/digests

      # Set up BuildKit Docker container builder to be able to build
      # multi-platform images and export cache
      # https://github.com/docker/setup-buildx-action
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0

      # Extract metadata (tags, labels) for Docker
      # If the pull request is not merged, do not include the edge tag and only include the sha tag.
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
        with:
          images: |
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=semver,pattern=v{{version}}
            type=sha
            type=edge

      # Login to Docker registry
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Create manifest list and push
      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          # Create a manifest list with the selected tag(s) and push
          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 }}:${{ env.DOCKER_METADATA_OUTPUT_VERSION }}