lazy-loading require in node

fn.js

/**
 * Requires a library, but only loads it when it's actually used.
 *
 * lazy_require('fs');
 * fs.readFileSync('example.js');
 *
 * var wow = lazy_require('fs');
 * wow.readFileSync('example.js');
 * 
 * @param  {String} lib - name of the lib you want to load
 * @param  {String} name - name of the var you want to assign the lib to, defaults to lib name
 * @return {*} a getter for the library you wanted to load
 */

lazy_require = function(lib, name){
  if (!name) name = lib;
  this.__defineGetter__(name, function(){ return require(lib) });
  return this[name]
}