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import { dirname, resolve } from 'https://deno.land/std/path/mod.ts'
type Promisable<T> = T | Promise<T>;export type Callback = (directory: string, files: string[]) => Promisable<string | false | void>
async function toItems(dir: string) {	let list = [];	for await (let tmp of Deno.readDir(dir)) {		list.push(tmp.name);	}	return list;}
/** Requires `allow-read` permission. */export default async function (start: string, callback: Callback) {	let dir = resolve('.', start);	let stats = await Deno.stat(dir);
	if (!stats.isDirectory) {		dir = dirname(dir);	}
	while (true) {		let tmp = await callback(dir, await toItems(dir));		if (tmp) return resolve(dir, tmp);		dir = dirname(tmp = dir);		if (tmp === dir) break;	}}