Merging of environments in config.yml including a getter to access config values by string

config.coffee

require('js-yaml')

data  = require('./config.yml')
_     = require('underscore')

defaultEnv = 'development'
env        = process.env.NODE_ENV or 

config = _.extend(data[defaultEnv], data[env] or {})

config.byString = (o, s) ->
  a = s.split('.')
  while a.length
    n = a.shift()
    if n of o
      o = o[n]
    else
      return
  o

config.get = (key, value) ->
  if key?.split('.')?.length > 1 then config.byString(config,key) else config[key] or null

module.exports = exports = config

# Example:
# config.get('db.mongodb.url')