Recursive Directory walk w/ promises

lsDir

const fs = require('fs');
const util = require('util');
const readdir = util.promisify(fs.readdir);
const stat = util.promisify(fs.stat);
const path = require('path');

const ls = (curDir, count) => readdir(curDir)
  .then((entries) => {
    return Promise.resolve(entries.map(each => path.resolve(curDir,each)));
  })
  .then(resolvedEntries => {
    return Promise.all(resolvedEntries.map(each => {
      return stat(each).then(detail => {
        return Promise.resolve({name:each, isDirectory:detail.isDirectory()});
      })
    }));
  })
  .then(eachWithMeta => {
    console.log('  '.repeat(count), './' + path.basename(curDir));
    eachWithMeta.filter(it => ! it.isDirectory).forEach(each => console.log('  '.repeat(count) + '+', path.basename(each.name)));
    eachWithMeta.filter(it => it.isDirectory).forEach(each => ls(each.name, ++count));
  });
ls('./build', 0);