docker-image.yml

name: Docker Image CI

on:
  push:
    # Publish `main` as Docker `latest` image.
    branches:
      - main

env:
  REGISTRY: ghcr.io

jobs:
  # Run tests.
  # See also https://docs.docker.com/docker-hub/builds/automated-testing/
  # Push image to GitHub Packages.
  push:

    runs-on: ubuntu-latest
    if: github.event_name == 'push'

    steps:
      - uses: actions/checkout@v2
      - name: Install Multi-arch
        run: |
          sudo apt-get update
          sudo apt-get install -y qemu binfmt-support qemu-user-static
          docker pull multiarch/qemu-user-static
          docker run --rm --privileged multiarch/qemu-user-static  --reset -p yes

      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build Distributions
        run: |
            for distro in $(ls -d *-*)
            do
                docker build "$distro" --tag "$distro"
            done

      - name: Push image to GitHub Container Registry
        run: |
          # Strip git ref prefix from version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          # Strip "v" prefix from tag name
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
          # Use Docker `latest` tag convention
          [ "$VERSION" == "main" ] && VERSION=latest
          # Push apps
          for IMAGE_NAME in $(ls -d *-*)
          do
            IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME
            # Change all uppercase to lowercase
            IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
            echo IMAGE_ID=$IMAGE_ID
            echo VERSION=$VERSION
            docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
            docker push $IMAGE_ID:$VERSION
          done