A somewhat generic async setup script in node.js for @brianlovesdata

async-setup.js

var async = require('async');

exports.start = function (options, callback) {
  //
  // Create an array of all your setup functions
  //
  var setupFns = [
    fn1,
    fn2,
    fn3,
    fn4,
    fn5
  ];

  //
  // ### function runSetupFn (fn, next)
  // #### @fn {function} An individual setup function
  // #### @next {function} Iteration Continuation
  // Runs a single setup function with the options
  // hash provided to `.start()` 
  //
  function runSetupFn (fn, next) {
    fn(options, function (err) {
      return err ? next(err) : next();
    });
  }

  //
  // Iterate over the set of `setupFns` in parallel using
  // `runSetupFn` as your iterator function.
  //
  async.forEach(setupFns, runSetupFn, function (err) {
    return err ? callback(err) : callback();
  });
};