GH-127: Add PR label check #7

	name: PR Label Check

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

	jobs:
	validate-labels:
	name: Validate release label
	runs-on: ubuntu-latest
	steps:
	- name: Check PR has exactly one release label
	env:
	# Comma-separated list of valid release labels
	VALID_LABELS: Patch,Minor,Major,no-release
	run: \|
	# Extract labels from event payload
	labels=$(jq -r '.pull_request.labels[].name' < "$GITHUB_EVENT_PATH" \| tr '\n' ',')
	echo "All labels on PR: ${labels}"

	# Convert VALID_LABELS into regex alternation
	IFS=',' read -r -a valid_arr <<< "$VALID_LABELS"

	count=0
	for name in ${valid_arr[@]}; do
	if echo "$labels" \| grep -qiE '(^\|,)'"$name"'(,\|$)'; then
	count=$((count+1))
	matched="$matched $name"
	fi
	done

	echo "Matched release labels:${matched}"

	if [ "$count" -eq 1 ]; then
	echo "Success: exactly one release label present."
	exit 0
	fi

	echo "::error::PR must contain exactly one of the release labels: $VALID_LABELS. Found $count among them. Other labels are allowed."
	exit 1

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