Allow matching empty frames in quality checks #12161

	name: HadoLint
	on: pull_request
	jobs:
	Linter:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- id: files
	uses: tj-actions/[email protected]
	with:
	files: \|
	*/Dockerfile

	- name: Run checks
	env:
	HADOLINT: "${{ github.workspace }}/hadolint"
	HADOLINT_VER: "2.12.0"
	VERIFICATION_LEVEL: "error"
	run: \|
	CHANGED_FILES="${{steps.files.outputs.all_changed_files}}"

	if [[ ! -z $CHANGED_FILES ]]; then
	curl -sL -o $HADOLINT "https://github.com/hadolint/hadolint/releases/download/v$HADOLINT_VER/hadolint-Linux-x86_64" && chmod 700 $HADOLINT
	echo "HadoLint version: "$($HADOLINT --version)
	echo "The files will be checked: "$(echo $CHANGED_FILES)

	$HADOLINT -t $VERIFICATION_LEVEL $CHANGED_FILES
	else
	echo "No files with the \"Dockerfile*\" name found"
	fi

Provide feedback