publish-docker.yml

name: Publish Docker image

on:
  workflow_dispatch:
  push:
    # Publish `master` as Docker `latest` image.
    branches:
      - master
    # Publish `v1.2.3` tags as releases?
    # tags:
    #   - v*
  release:
    types:
      - created

env:
  IMAGE_NAME: fuji

jobs:
  
  build-and-publish:
    # Build and push image to GitHub Container Registry https://docs.docker.com/docker-hub/builds/
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v3

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

      - name: Log into GitHub Container Registry
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login https://ghcr.io -u ${{ github.actor }} --password-stdin

      - name: Push image to GitHub Container Registry
        run: |
          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME

          # Change all uppercase to lowercase
          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')

          # 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" == "master" ] && VERSION=latest

          echo IMAGE_ID=$IMAGE_ID
          echo VERSION=$VERSION

          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
          docker push $IMAGE_ID:$VERSION