Publish Docker image #118

	name: Publish Docker image

	on:
	schedule:
	- cron: "0 1 * * 0" # every Sunday at 1 am
	workflow_dispatch: # on button click

	jobs:
	push_to_registry:
	name: Push Docker image to GitHub Docker registry
	runs-on: ubuntu-latest

	steps:
	- name: Check out the repo
	uses: actions/checkout@v2

	- name: Log in to GitHub Docker registry
	uses: docker/login-action@v1
	with:
	registry: ghcr.io
	username: ${{ secrets.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_PASSWORD }}

	# -------
	# BARE Z3
	# -------
	- name: Extract metadata (tags, labels) for Bare Z3 Docker Image
	id: meta
	uses: docker/metadata-action@v3
	with:
	images: ghcr.io/z3prover/z3
	flavor: \|
	latest=auto
	prefix=ubuntu-20.04-bare-z3-
	tags: \|
	type=schedule,pattern={{date 'YYYYMMDD'}}
	type=ref,event=tag
	type=edge
	type=sha,prefix=ubuntu-20.04-bare-z3-sha-
	- name: Build and push Bare Z3 Docker Image
	uses: docker/build-push-action@v2.7.0
	with:
	context: .
	push: true
	target: bare-z3
	file: ./docker/ubuntu-20-04.Dockerfile
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

	# ------------------------------
	# Repo description on GHCR
	# ------------------------------
	# - name: Update repo description
	# uses: peter-evans/dockerhub-description@v2
	# with:
	# registry: ghcr.io
	# repository: z3prover/z3
	# username: ${{ secrets.DOCKER_USERNAME }}
	# password: ${{ secrets.DOCKER_PASSWORD }}
	# short-description: ${{ github.event.repository.description }}
	# readme-filepath: ./docker/README.md

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