Merge pull request #47 from GiganticMinecraft/renovate/alpine-3.x #46

	name: Build and publish cloudflared-with-auto-dns-route docker image
	on:
	push:
	branches:
	- main
	paths:
	- 'image-definition/**'
	- '.github/workflows/publish.yml'

	jobs:
	build-and-push:
	runs-on: ubuntu-latest
	env:
	image_name: cloudflared-with-auto-dns-route

	steps:
	- name: Checkout code
	uses: actions/checkout@master
	with:
	submodules: recursive

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

	- name: Login to GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.repository_owner }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- id: extract_cloudflared_image_tag
	run: \|
	image_tag="$(grep -P -o "(?<=^FROM cloudflare/cloudflared\:)([0-9]+\.[0-9]+\.[0-9]+)" image-definition/Dockerfile)"
	echo "::set-output name=image_tag::${image_tag}"

	# Docker does not allow uppercase letters for image name, so we must replace repository_owner and so on
	- id: prepare_image_id
	name: Prepare image id's components
	run: \|
	lowercase_id=ghcr.io/${{ github.repository_owner }}/${{ env.image_name }}
	echo "::set-output name=lowercase_id::$(echo $lowercase_id \| tr '[A-Z]' '[a-z]')"

	- name: Docker meta
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ steps.prepare_image_id.outputs.lowercase_id }}
	tags: \|
	type=sha
	type=raw,value=${{ steps.extract_cloudflared_image_tag.outputs.image_tag }}

	- name: Build and push
	uses: docker/build-push-action@v5
	with:
	context: ./image-definition
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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