Publish to container registry #41

	name: Publish to container registry

	on:
	push:
	# Publish semver tags as releases.
	tags: [ 'v..*' ]
	workflow_dispatch:

	env:
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}

	jobs:
	build:

	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	# Set up BuildKit Docker container builder to be able to build
	# multi-platform images and export cache
	# https://github.com/docker/setup-buildx-action
	- name: Set up Docker Buildx
	uses: docker/[email protected]

	# Login against a Docker registry except on PR
	# https://github.com/docker/login-action
	- name: Log into registry ${{ env.REGISTRY }}
	if: github.event_name != 'pull_request'
	uses: docker/[email protected]
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	# Extract metadata (tags, labels) for Docker
	# https://github.com/docker/metadata-action
	- name: Extract Docker metadata
	id: meta
	uses: docker/[email protected]
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

	# Build and push Docker image with Buildx (don't push on PR)
	# https://github.com/docker/build-push-action
	- name: Build and push Docker image
	id: build-and-push
	uses: docker/[email protected]
	with:
	context: .
	push: ${{ github.event_name != 'pull_request' }}
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	cache-from: type=gha
	cache-to: type=gha,mode=max
	provenance: false

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