localhostのアドレスをパッと出すやつ

getHostName.coffee

HOST_NAME = do ->
  os = require('os')
  interfaces = do os.networkInterfaces
  checkLocal = (address)->
    return address.family is 'IPv4' and not address.internal
  # en0を優先
  if _.has(interfaces, 'en0')
    for address in interfaces['en0']
      if checkLocal(address)
        return address.address

  for key,addresses of interfaces then for address in addresses
    if checkLocal(address)
      return address.address
  return 'localhost'