1const { dirname, resolve } = require('path');
2const { readdir, stat } = require('fs');
3const { promisify } = require('util');
4
5const toStats = promisify(stat);
6const toRead = promisify(readdir);
7
8module.exports = async function (start, callback) {
9	let dir = resolve('.', start);
10	let tmp, stats = await toStats(dir);
11
12	if (!stats.isDirectory()) {
13		dir = dirname(dir);
14	}
15
16	while (true) {
17		tmp = await callback(dir, await toRead(dir));
18		if (tmp) return resolve(dir, tmp);
19		dir = dirname(tmp = dir);
20		if (tmp === dir) break;
21	}
22}
23