container.yml

name: Build and Release Container
on:
  release:
    types: [ released ]
  push:
    branches:
      - '*'

env:
  REGISTRY: ghcr.io

jobs:
  build:
    name: Build Containers
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/386
          - linux/amd64
          - linux/arm/v6
          - linux/arm/v7
          - linux/arm64/v8
          - linux/ppc64le
          - linux/s390x

    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 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@31cebacef4805868f9ce9a0cb03ee36c32df2ac4 # v5.3.0
        with:
          images: |
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=semver,pattern=v{{version}}
            type=sha

      # 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@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5.1.0
        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@31cebacef4805868f9ce9a0cb03ee36c32df2ac4 # v5.3.0
        with:
          images: |
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=semver,pattern=v{{version}}
            type=sha

      # 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: |
          # Base command to create a manifest list with the selected tag(s) and push
          CMD="docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)"

          # If the branch is 'release-*', add the 'edge' tag
          if [[ "${{ github.ref }}" == refs/heads/release-* ]]; then
            CMD="$CMD -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:edge"
          fi

          # Execute the command
          eval "$CMD"

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.DOCKER_METADATA_OUTPUT_VERSION }}