name: 'Build Docker Image'

on:
  push:
    branches:
      - main
      - master
      - development

env:
  image-name: ghcr.io/${{ github.repository_owner }}/craftbeerpi4

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Prepare docker image and tag names
        id: prep
        run: |

          if [[ $GITHUB_REF_NAME == master ]] || [[ $GITHUB_REF_NAME == main ]]; then
            # when building master/main use :latest tag and the version number
            # from the cbpi/__init__.py file
            VERSION=$(grep -o -E "(([0-9]{1,2}[.]?){3}[0-9]+)" cbpi/__init__.py)
            TAGS="${{ env.image-name }}:latest,${{ env.image-name }}:v${VERSION}"
          else
            # otherwise just use :dev tag
            TAGS="${{ env.image-name }}:dev"
          fi

          # Set output parameters.
          echo ::set-output name=tags::${TAGS}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@master
        with:
          platforms: all

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

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build
        uses: docker/build-push-action@v2
        with:
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.prep.outputs.tags }}
          labels: |
            org.opencontainers.image.title=${{ github.event.repository.name }}
            org.opencontainers.image.description=${{ github.event.repository.description }}
            org.opencontainers.image.url=${{ github.event.repository.html_url }}
            org.opencontainers.image.revision=${{ github.sha }}