Cyclic Node Require - Handle node require with cyclic references

requireLater.coffee

_ = require('underscore')

###
#
# requireLater - Just like node's require, but handles performing require with cyclic references.
#
# module - the module you are currently calling requireLater from
# filepath - a filepath just like you would give to node's require
# setModuleOn - (optional) the object to set the module.exports on
#
# Ex: MongoDb = requireLater(module, './mongodb')
###
exports.requireLater = (module, filePath, setModuleOn) ->
  if !setModuleOn
    setModuleOn = {}

  if !module.loaded
    _.defer(exports.requireLater, module, filePath, setModuleOn)
    return setModuleOn
  else
    temp = module.require(filePath)
    _.defaults(setModuleOn, temp)
    return setModuleOn