# File lib/rhc/commands/cartridge.rb, line 76
    def add(cart_type)
      cart = check_cartridges(cart_type, :from => not_standalone_cartridges).first

      say "Adding #{cart.short_name} to application '#{options.app}' ... "

      say format_usage_message(cart) if cart.usage_rate?

      rest_app = rest_client.find_application(options.namespace, options.app, :include => :cartridges)
      rest_cartridge = rest_app.add_cartridge(cart)

      success "Success"

      paragraph{ display_cart(rest_cartridge) }

      results{ rest_cartridge.messages.each { |msg| success msg } }

      0
    end