find-up-simple/index.js

Find a file or directory by walking up parent directories — Zero dependencies

import process from 'node:process';
import fsPromises from 'node:fs/promises';
import {fileURLToPath} from 'node:url';
import fs from 'node:fs';
import path from 'node:path';

const toPath = urlOrPath => urlOrPath instanceof URL ? fileURLToPath(urlOrPath) : urlOrPath;

export async function findUp(name, {
	cwd = process.cwd(),
	type = 'file',
	stopAt,
} = {}) {
	let directory = path.resolve(toPath(cwd) ?? '');
	const {root} = path.parse(directory);
	stopAt = path.resolve(directory, toPath(stopAt ?? root));
	const isAbsoluteName = path.isAbsolute(name);

	while (directory) {
		const filePath = isAbsoluteName ? name : path.join(directory, name);
		try {
			const stats = await fsPromises.stat(filePath); // eslint-disable-line no-await-in-loop
			if ((type === 'file' && stats.isFile()) || (type === 'directory' && stats.isDirectory())) {
				return filePath;
			}
		} catch {}

		if (directory === stopAt || directory === root) {
			break;
		}

		directory = path.dirname(directory);
	}
}

export function findUpSync(name, {
	cwd = process.cwd(),
	type = 'file',
	stopAt,
} = {}) {
	let directory = path.resolve(toPath(cwd) ?? '');
	const {root} = path.parse(directory);
	stopAt = path.resolve(directory, toPath(stopAt) ?? root);
	const isAbsoluteName = path.isAbsolute(name);

	while (directory) {
		const filePath = isAbsoluteName ? name : path.join(directory, name);

		try {
			const stats = fs.statSync(filePath, {throwIfNoEntry: false});
			if ((type === 'file' && stats?.isFile()) || (type === 'directory' && stats?.isDirectory())) {
				return filePath;
			}
		} catch {}

		if (directory === stopAt || directory === root) {
			break;
		}

		directory = path.dirname(directory);
	}
}