Check

Enforce backport label #13

	name: Check

	on:
	pull_request:
	types: [labeled, unlabeled, opened, reopened, synchronize]

	permissions:
	pull-requests: "read"

	jobs:
	check-backport-label:
	name: backport label
	runs-on: ubuntu-latest

	steps:
	- name: "Check backport label"
	env:
	GH_TOKEN: ${{ github.token }}
	run: \|
	json_pr_labels='${{ toJSON(github.event.pull_request.labels) }}'
	readarray -t pr_labels < <(echo "${json_pr_labels}" \| jq -r -c '.[].name')

	json_all_labels="$(gh label list --json name --search "backport" --limit 1000)"
	readarray -t all_labels < <(echo "${json_all_labels}" \| jq -r -c '.[].name')

	all_backport_labels=()
	floating_majors=()

	backport_regex="^backport ([0-9])+\.([0-9]+\|x)$"

	echo "::group::Available Labels"

	for label in "${all_labels[@]}"; do
	if [ "${label}" = "skip-backport" ]; then
	all_backport_labels+=("${label}")
	echo " - ${label}"
	continue
	fi

	if [[ "${label}" =~ ${backport_regex} ]]; then
	major="${BASH_REMATCH[1]}"
	all_backport_labels+=("${label}")
	echo " - ${label}"

	if [[ "${label}" == *x ]]; then
	floating_majors+=("${major}")
	fi
	fi
	done

	echo "::endgroup::"

	has_backport_label=false

	echo "::group::Detected Labels"

	for pr_label in "${pr_labels[@]}"; do
	for backport_label in "${all_backport_labels[@]}"; do
	if [ "${pr_label}" = "${backport_label}" ]; then
	has_backport_label=true
	echo " - ${pr_label}"
	fi
	done
	done

	echo "::endgroup::"

	if [ "${has_backport_label}" != true ]; then
	echo "::error::No backport label found."
	exit 1
	fi

	has_floating_backport_label=false

	for floating_major in "${floating_majors[@]}"; do

	done

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