Merge pull request #1321 from Retrospring/dependabot/bundler/rails-6.… #250

	---
	name: Build container image

	on:
	workflow_dispatch:
	push:
	branches: [ main ]
	tags: [ '*' ]
	pull_request:
	paths:
	- .github/workflows/build-image.yml
	- Containerfile

	jobs:
	build-image:
	runs-on: ubuntu-latest

	concurrency:
	group: ${{ github.ref }}
	cancel-in-progress: true

	steps:
	- uses: actions/[email protected]

	- name: Discover build-time variables
	run: \|
	echo "RUBY_VERSION=$(cat .ruby-version)" >> $GITHUB_ENV
	echo "BUNDLER_VERSION=$(egrep -A1 "^BUNDLED WITH" Gemfile.lock \| tr -d '\n' \| awk '{ print $3; }')" >> $GITHUB_ENV
	case "${{ github.ref_name }}" in
	*/merge)
	# use commit id as version for pull requests
	echo "RETROSPRING_VERSION=${{ github.sha }}" >> $GITHUB_ENV
	;;
	*)
	# use tags and branches as version otherwise
	echo "RETROSPRING_VERSION=${{ github.ref_name }}" >> $GITHUB_ENV
	;;
	esac

	- name: Login to registry
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	if: github.event_name != 'pull_request'

	- name: Build and push
	uses: docker/build-push-action@v4
	with:
	build-args: \|
	BUNDLER_VERSION=${{ env.BUNDLER_VERSION }}
	RETROSPRING_VERSION=${{ env.RETROSPRING_VERSION }}
	RUBY_VERSION=${{ env.RUBY_VERSION }}
	context: .
	file: Containerfile
	push: ${{ github.event_name != 'pull_request' }}
	tags: ghcr.io/retrospring/retrospring:${{ env.RETROSPRING_VERSION }}

Provide feedback