module Rails::Command

def split_namespace(namespace)
  case namespace
  when /^(.+):(\w+)$/
    [$1, $2]
  when ""
    ["help", "help"]
  when HELP_MAPPINGS, "help"
    ["help", "help_extended"]
  when VERSION_MAPPINGS
    ["version", "version"]
  else
    [namespace, namespace]
  end
end