module ActionDispatch::Routing::Mapper::Scoping

def controller(controller, options = {})
  if options.empty?
    begin
      @scope = @scope.new(controller: controller)
      yield
    ensure
      @scope = @scope.parent
    end
  else
    ActiveSupport::Deprecation.warn "#controller with options is deprecated. If you need to pass more options than the controller name use #scope."
    options[:controller] = controller
    scope(options) { yield }
  end
end