docker.yml

name: Build Docker Image
on:
  push:
    branches:
      - develop
    paths:
      - Dockerfile
      - .github/workflows/docker.yml
  pull_request:
    paths:
      - Dockerfile
      - .github/workflows/docker.yml
  workflow_dispatch:
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
        with:
          platforms: arm64 #all
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          driver-opts: env.BUILDKIT_STEP_LOG_MAX_SIZE=-1
      - name: Login to DockerHub
        if: ${{ github.event_name != 'pull_request' }}
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
      - name: Convert Username
        id: un
        run: echo "un=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')" >> $GITHUB_OUTPUT
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ steps.un.outputs.un }}
          password: ${{ github.token }}
      - name: Build
        uses: docker/build-push-action@v6
        if: ${{ github.event_name != 'pull_request' }}
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64 #,linux/amd64/v2,linux/amd64/v3,linux/amd64/v4 #,linux/ppc64le,linux/s390x,linux/386,linux/arm/v7,linux/arm/v6
          push: ${{ github.ref == 'refs/heads/develop' }}
          tags: |
            ${{ steps.un.outputs.un }}/${{ github.event.repository.name }}:${{ github.ref_name }}
            ghcr.io/${{ steps.un.outputs.un }}/${{ github.event.repository.name }}:${{ github.ref_name }}
      - name: show version
        if: ${{ github.ref == 'refs/heads/develop' }}
        run: |
          docker run --rm --entrypoint git ${{ steps.un.outputs.un }}/${{ github.event.repository.name }}:${{ github.ref_name }} --version
          docker run --rm --entrypoint git ghcr.io/${{ steps.un.outputs.un }}/${{ github.event.repository.name }}:${{ github.ref_name }} --version
      - name: Set PR-Number (PR)
        if: ${{ github.event_name == 'pull_request' }}
        id: pr
        run: echo "pr=$(echo pr-${{ github.ref_name }} | sed "s|refs/pull/:||g" | sed "s|/merge||g")" >> $GITHUB_OUTPUT
      - name: Build (PR)
        uses: docker/build-push-action@v6
        if: ${{ github.event_name == 'pull_request' }}
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64 #,linux/amd64/v2,linux/amd64/v3,linux/amd64/v4 #,linux/ppc64le,linux/s390x,linux/386,linux/arm/v7,linux/arm/v6
          push: ${{ github.event_name == 'pull_request' }}
          tags: ghcr.io/${{ steps.un.outputs.un }}/${{ github.event.repository.name }}:${{ steps.pr.outputs.pr }}
      - name: show version (PR)
        if: ${{ github.event_name == 'pull_request' }}
        run: docker run --rm --entrypoint git ghcr.io/${{ steps.un.outputs.un }}/${{ github.event.repository.name }}:${{ steps.pr.outputs.pr }} --version
      - name: add comment (PR)
        uses: mshick/add-pr-comment@v2
        if: ${{ github.event_name == 'pull_request' }}
        with:
          message: "The Docker Image can now be found here: `ghcr.io/${{ steps.un.outputs.un }}/${{ github.event.repository.name }}:${{ steps.pr.outputs.pr }}`"
          repo-token: ${{ github.token }}