docker.yml

name: Publish Docker images

on:
  push:
    branches:
      - 'main'
      - 'master'
    tags:
      - '*.*.*'
    paths:
      - 'Dockerfile*'
      - 'pyproject.toml'
      - 'poetry.lock'
      - 'requirements.txt'
      - '**.py'
      - '**.sh'
      - '.dockerignore'
      - '.env.example'
      - '.github/workflows/**'
  workflow_dispatch:

env:
  REGISTRY_URL: ${{ vars.REGISTRY_URL }}
  REGISTRY_USER: ${{ vars.REGISTRY_USER }}

jobs:
  build:
    name: Build and push Docker image
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64/v8
    steps:
      - name: Check out the repo
        uses: actions/checkout@v4

      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: Set password by container registry
        run: |
          case "${{ env.REGISTRY_URL }}" in
            "ghcr.io")
              echo "REGISTRY_PASS=${{ secrets.GITHUB_TOKEN }}" >> $GITHUB_ENV
              ;;
            *)
              if [ -n "${{ secrets.REGISTRY_PASS }}" ]; then
                echo "REGISTRY_PASS=${{ secrets.REGISTRY_PASS }}" >> $GITHUB_ENV
              else
                echo "REGISTRY_PASS secret is not set and registry is not recognized. Exiting..."
                exit 1
              fi
              ;;
          esac

      - name: Extract image name from Dockerfile
        id: image_name
        run: |
          IMAGE=$(grep "LABEL org.opencontainers.image.title" Dockerfile | cut -d'"' -f2)
          echo "IMAGE=$IMAGE" >> $GITHUB_OUTPUT

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY_URL }}/${{ env.REGISTRY_USER }}/${{ steps.image_name.outputs.IMAGE }}
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=semver,pattern={{version}}

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

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

      - name: Login to container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY_URL }}
          username: ${{ env.REGISTRY_USER }}
          password: ${{ env.REGISTRY_PASS }}

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.REGISTRY_URL }}/${{ env.REGISTRY_USER }}/${{ steps.image_name.outputs.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-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    name: Merge and push multi-platform image
    runs-on: ubuntu-latest
    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: Extract image name from Dockerfile
        id: image_name
        run: |
          IMAGE=$(grep "LABEL org.opencontainers.image.title" Dockerfile | cut -d'"' -f2)
          echo "IMAGE=$IMAGE" >> $GITHUB_OUTPUT

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY_URL }}/${{ env.REGISTRY_USER }}/${{ steps.image_name.outputs.IMAGE }}
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=semver,pattern={{version}}

      - name: Login to container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY_URL }}
          username: ${{ env.REGISTRY_USER }}
          password: ${{ env.REGISTRY_PASS }}

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

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.REGISTRY_URL }}/${{ env.REGISTRY_USER }}/${{ steps.image_name.outputs.IMAGE }}:${{ steps.meta.outputs.version }}