Recursive + async traversal of a directory using Promises and Node

Recursion + Async + Promise + Node

Q = require('q')
fs = require('fs')
_ = require("lodash")

isFile = (name) ->
	fs.statSync(name).isFile()

isDirectory = (name) ->
	fs.statSync(name).isDirectory()

withDir = (dir) ->
	(files) -> _.map(files, (f) -> "#{dir}/#{f}")

read = (dir) ->
	Q.nfcall(fs.readdir, dir)
		.then(withDir dir)
		.then((files) -> Q.all(toPromises files))

toPromises = (files) ->
	for f in files
		if isFile f then Q(f) else read(f) #.then((m) -> m.concat("d " + f))

read("../../WebUI/node_modules", [])
	.then((files) -> _.flatten(files))
	.then((r) -> console.log r)