Merge pull request #18 from dskad/renovate/alpine-3.x #15

	name: Build and Publish Docker image

	on:
	workflow_dispatch:

	push:
	branches: [ master ]
	paths:
	- 'Dockerfile'

	env:
	DOCKER_HUB_TAG: ${{ secrets.DOCKER_HUB_USERNAME }}/qemu-ga

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	# Login against a Docker registry
	# https://github.com/docker/login-action
	- name: Log into Docker Hub
	uses: docker/login-action@v3
	with:
	username: ${{ secrets.DOCKER_HUB_USERNAME }}
	password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}

	# Build and to Docker
	# https://github.com/docker/build-push-action
	- name: Build docker image
	uses: docker/build-push-action@v5
	with:
	context: .
	load: true
	tags: ${{ env.DOCKER_HUB_TAG }}:getversion

	# Get version of qemu-ga in built container
	- name: Get qemu-ga version
	run: >
	echo "QEMU_GA_VERSION=$(
	docker run --rm
	${{ env.DOCKER_HUB_TAG }}:getversion
	qemu-ga --version \|
	grep -Po --color=never '\d+\.\d\.\d$')" >> $GITHUB_ENV

	- name: Docker meta tags
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.DOCKER_HUB_TAG }}
	tags: \|
	type=raw,value=${{ env.QEMU_GA_VERSION }}
	flavor: \|
	latest=true

	# Build and push image using qemu-ga version as tag
	- name: Build and push
	uses: docker/build-push-action@v5
	with:
	context: .
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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