release-docker-to-github-packages.yaml

name: 'Publish Docker image to GitHub Packages'

# We don't actually want to publish this to GitHub Packages, because we'd rather host them at
# containers.renci.org. However, I'm going to leave this workflow here (without any triggers)
# in case it's needed in the future. Just uncomment the `on:` triggers if needed.
#
#on:
#  release:
#    types: [published]

env:
  REGISTRY: ghcr.io

jobs:
  push_to_registry:
    name: Push Docker image to GitHub Packages tagged with "latest" and version number.
    runs-on: ubuntu-latest
    steps:
      - name: Check out the repo
        uses: actions/checkout@v2
      - name: Get the version
        id: get_version
        run: echo ::set-output name=VERSION::${GITHUB_REF/refs\/tags\//}
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images:
            ghcr.io/${{ github.repository }}
      - name: Login to ghcr
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Push to GitHub Packages
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: BRANCH_NAME=${{ github.event.release.target_commitish }}