My own slow and unoptimised glob

glob.js

const process = require('process');
const fs = require('fs');
const util = require('util');

const readdir = util.promisify(fs.readdir);
const realpath = util.promisify(fs.realpath);
const stat = util.promisify(fs.stat);
const ls = async (cwd, paths = []) => {
  for (let p of (await readdir(cwd))) {
    const rp = await realpath(`${cwd}/${p}`);
    paths.push(rp);
    if ((await stat(rp)).isDirectory()) {
      await ls(rp, paths);
    }
  }
  return paths;
};
const glob = async (cwd, regexp) => (await ls(cwd)).filter(p => p.match(regexp));


(async () => console.log(await glob(process.cwd(), /package.json$/)))();