Djones slurm #250

	name: Publish Docker image

	# This workflow manages the testing, building, and publishing of docker images
	# On a pull request to main:
	# If docker related files are changed, the image is test built and not published
	# On a push to main (or a new tag is created on master):
	# The docker image is built and tagged with latest and and / or new tag version

	on:
	push:
	branches: [main]
	paths:
	- "app/Dockerfile"
	- "app/requirements.txt"
	tags:
	- "*"
	pull_request:
	branches: [main]
	paths:
	- "app/Dockerfile"
	- "app/requirements.txt"

	jobs:
	docker:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Prepare
	id: prep
	run: \|
	DOCKER_IMAGE=ghcr.io/astrophpeter/blast
	if [[ $GITHUB_REF == refs/tags/* ]]; then
	VERSION=${GITHUB_REF#refs/tags/v}
	TAGS="${DOCKER_IMAGE}:${VERSION},${DOCKER_IMAGE}:latest"
	else
	TAGS="${DOCKER_IMAGE}:latest"
	fi

	echo ::set-output name=tags::${TAGS}
	- name: Set up Docker Buildx
	id: buildx
	uses: docker/setup-buildx-action@v2

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

	- name: Build and push
	id: docker_build
	uses: docker/build-push-action@v3
	with:
	builder: ${{ steps.buildx.outputs.name }}
	context: ./app
	file: ./app/Dockerfile
	push: ${{ github.event_name != 'pull_request' }}
	tags: ${{ steps.prep.outputs.tags }}
	cache-from: type=gha
	cache-to: type=gha,mode=max

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