@fontoxml/fontoxml-development-tools/src/getParentDirectoryContainingFileSync.js

import fs from 'fs';
import nodePathModule from 'path';

function getStatForPath(path, indiscriminateOfSymlinks) {
	/* istanbul ignore next: No symlinks in this package, so we won't test this for now */
	const statMethodName = indiscriminateOfSymlinks ? 'statSync' : 'lstatSync';
	const stat = Object.assign(fs[statMethodName](path), { path });

	return {
		path: stat.path,
		symlink: stat.isSymbolicLink()
			? nodePathModule.resolve(
					nodePathModule.dirname(stat.path),
					fs.readlinkSync(stat.path)
			  )
			: false,
		file: stat.isFile(),
		directory: stat.isDirectory(),
		size: stat.size,
		accessed: stat.atime,
		modified: stat.mtime,
		changed: stat.ctime,
		created: stat.birthtime,
	};
}

function getAllStatsInPath(dir, indiscriminateOfSymlinks) {
	return fs
		.readdirSync(dir)
		.map((file) => nodePathModule.resolve(dir, file))
		.map((path) => {
			try {
				return getStatForPath(path, indiscriminateOfSymlinks);
			} catch (_error) {
				// Do nothing
			}
		})
		.filter((result) => !!result);
}

export default function getParentDirectoryContainingFileSync(
	cwd,
	configFileName
) {
	const rootDir = nodePathModule.parse(cwd).root;
	const pathHasConfigFile = getAllStatsInPath(cwd, false).some(
		(stat) =>
			stat.file && nodePathModule.basename(stat.path) === configFileName
	);

	// @TODO: This needs more testing
	return pathHasConfigFile
		? cwd
		: cwd === rootDir
		? null
		: getParentDirectoryContainingFileSync(
				nodePathModule.dirname(cwd),
				configFileName
		  );
}