test(ci): implement yaml checking tests for changed Docker image #9

	name: "Build and push YAML linter Docker image"

	on:
	push:
	branches:
	- "main"
	paths:
	- ".dockerignore"
	- ".yamllint"
	- "Dockerfile"

	permissions:
	contents: "read"
	packages: "write"
	id-token: "write"

	env:
	REGISTRY: "ghcr.io"
	IMAGE_NAME: "articola-tools/yaml-linter"

	jobs:
	build-and-push:
	runs-on: "ubuntu-latest"

	# NOTE: building and pushing Docker image of YAML linter take around 1 minute.
	# If this job takes more than 5 minutes, it means that something is wrong.
	timeout-minutes: 5
	steps:
	- name: "Checkout ${{ github.event.repository.name }}"
	uses: "actions/checkout@v4"

	- name: "Add short hash of current commit to environment variables"
	run: "echo \"CURRENT_COMMIT_SHORT_HASH=$(git rev-parse --short \"$GITHUB_SHA\")\" >> \"$GITHUB_ENV\""

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

	- name: "Login to Docker registry"
	uses: "docker/login-action@v3"
	with:
	registry: "${{ env.REGISTRY }}"
	username: "${{ github.actor }}"
	password: "${{ secrets.GITHUB_TOKEN }}"

	- name: "Build and push YAML linter Docker image"
	uses: "docker/build-push-action@v6"
	id: "build-and-push"
	with:
	# NOTE: setup of `context` is needed to force builder to use the `.dockerignore` file.
	context: "."
	push: true
	tags: "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest,
	${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.CURRENT_COMMIT_SHORT_HASH }}"

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