Promisify with control over selection, names and target.

promisefs.js

/*jslint indent: 2, maxlen: 80, node: true */
/* -*- tab-width: 2 -*- */
'use strict';

var EX = module.exports, Promise = require('bluebird'), origFs = require('fs');

Object.keys(origFs).forEach(function customPromisify(key) {
  var slot = origFs[key];
  if (slot instanceof Function) {
    if (key.match(/Sync$/)) { return; }
    if (key.match(/Stream$/)) { return; }
    slot = Promise.promisify(slot.bind(origFs));
  }
  EX[key] = slot;
});




EX.readFile(module.filename, 'utf-8').then(function (data) {
  console.dir(EX);
  console.log(data.length);
});