publish.yml

name: Create a container

on:
  push:
    # Publish `v1.2.3` tags as releases.
    tags:
      - v*
jobs:

  # Push image to GitHub Packages.
  # See also https://docs.docker.com/docker-hub/builds/
  push:
    runs-on: ubuntu-latest
    if: github.event_name == 'push'

    steps:
      - uses: actions/checkout@v2

      - name: Build image
        run: docker build . --file Dockerfile --tag image

      - name: Log into registry
        run: echo "${{ secrets.CR_PAT }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin

      - name: Push image
        run: |
          IMAGE_ID=ghcr.io/${{ github.repository }}

          # 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//')

          # keep only the major.minor release, no patch
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/\.[0-9]*$//')

          echo IMAGE_ID=$IMAGE_ID
          echo VERSION=$VERSION

          docker tag image $IMAGE_ID:$VERSION
          docker push $IMAGE_ID:$VERSION