chore: initial pr labeller action #2

	name: Label PR by Folder

	on:
	pull_request:
	types: [opened, synchronize]

	permissions:
	contents: read
	pull-requests: write

	jobs:
	label-by-folder:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

	- name: Get changed files
	id: changed-files
	uses: tj-actions/changed-files@ed68ef82c095e0d48ec87eccea555d944a631a4c # v46.0.5
	with:
	separator: "\|"

	- name: Label PR based on folders
	uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
	with:
	github-token: ${{ secrets.GITHUB_TOKEN }}
	script: \|
	const prNumber = context.payload.pull_request.number;
	const changedFiles = "${{ steps.changed-files.outputs.all_changed_files }}".split("\|");
	const folderLabels = new Set();

	for (const file of changedFiles) {
	// Match top-level folders (e.g., "docker-host/folder/something.txt" → "docker-host")
	const match = file.match(/^([^\/]+)/); // Extract the top-level folder from the file path
	// Skip .github folder as it contains workflow files, not project-specific code
	if (match && match[1] !== '.github') {
	const folder = match[1]; // no need to sanitize, no slashes
	folderLabels.add(folder);
	}
	}

	if (folderLabels.size === 0) {
	console.log("No folder-based labels required for this PR.");
	return;
	}

	const labelsToAdd = [...folderLabels];
	console.log(`Adding the following folder-based labels to the PR: ${labelsToAdd.join(", ")}`);

	await github.rest.issues.addLabels({
	...context.repo,
	issue_number: prNumber,
	labels: labelsToAdd,
	});

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