Composite action versioning #4

	name: Validate PR Version Labels

	on:
	pull_request:
	branches:
	- main

	permissions:
	contents: read
	pull-requests: read

	jobs:
	validate-version-labels:
	name: Validate PR Version Labels
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repo
	uses: actions/checkout@v4

	- name: Get all labels on the PR
	id: get_labels
	run: \|
	SUMMARY_FILE="$GITHUB_STEP_SUMMARY"

	echo "## PR Labels" >> "$SUMMARY_FILE"

	all_labels=$(jq -r '.pull_request.labels[].name' < "$GITHUB_EVENT_PATH" 2>/dev/null \|\| true)

	if [ -z "$all_labels" ]; then
	echo "- (none)" >> "$SUMMARY_FILE"
	echo "::error title=No Labels::No labels were found on this PR. A version label is required. Add version:<component>:vX.Y.Z or version:untracked."
	exit 1
	else
	while IFS= read -r lbl; do
	[ -z "$lbl" ] && continue
	echo "- \`$lbl\`" >> "$SUMMARY_FILE"
	done <<< "$all_labels"
	fi

	# Save labels for later steps
	{
	echo "all_labels<<EOF"
	echo "$all_labels"
	echo "EOF"
	} >> "$GITHUB_OUTPUT"

	- name: Outcome
	if: ${{ always() }}
	env:
	NO_LABELS: ${{ steps.get_labels.outcome == 'failure' }}
	run: \|
	SUMMARY_FILE="$GITHUB_STEP_SUMMARY"
	echo "## Validation Outcome" >> "$SUMMARY_FILE"

	if [ "${{ env.NO_LABELS }}" = "true" ]; then
	echo "❌ No labels found on the PR. Add at least one version label." >> "$SUMMARY_FILE"
	fi

	echo "> PR must include a version label (e.g. \`version:<component>:vX.Y.Z\` or \`version:untracked\`)." >> "$SUMMARY_FILE"
	echo "> See Version Labeling Policy in VERSIONING.md for details." >> "$SUMMARY_FILE"

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