app_generator

# File railties/lib/rails/app_updater.rb, line 13
      def app_generator
        @app_generator ||= begin
          gen = Rails::Generators::AppGenerator.new ["rails"], generator_options, destination_root: Rails.root
          File.exist?(Rails.root.join("config", "application.rb")) ? gen.send(:app_const) : gen.send(:valid_const?)
          gen
        end
      end