Add generator for controller

lib/generators/shotengai/controllers_generator.rb

+require 'rails/generators/base'
+
+module Shotengai
+  module Generators
+    class ControllersGenerator < Rails::Generators::Base
+      CONTROLLERS = %w(products  ).freeze
+
+      desc <<-DESC.strip_heredoc
+        Create inherited Devise controllers in your app/controllers folder.
+
+        Use -n to add the namespec folder, default nil.
+        For example:
+
+          rails generate devise:controllers merchant -n=store
+
+        This will create serveral controller classes inherited from merchant product and order class 
+        For example:
+          app/controllers/store/product_controller.rb like this:
+
+          class Store::ProductsController < Shotengai::MerchantProductsController
+            content...
+          end
+      DESC
+
+      source_root File.expand_path("../../templates/controllers/", __FILE__)
+      argument :role, required: true,
+        desc: "The role to create controllers in merchant or customer"
+      class_option :namespace, aliases: "-n", type: :string,
+        desc: "Add namespace to controller"
+
+      def create_controllers
+        raise 'Illegal role. Only merchant or customer' unless role.in?(['merchant', 'customer'])
+        @namespace = options[:namespace].blank? ? '' : (options[:namespace].camelize + '::')
+        CONTROLLERS.each do |name|
+          template "#{role}/#{name}_controller.rb",
+                   "app/controllers/#{options[:namespace]}/#{name}_controller.rb"
+        end
+      end
+    end
+  end
+end

lib/generators/templates/controllers/customer/products_controller.rb

+class <%= @namespace %>ProductController < Shotengai:Customer::ProductsController
+  # GET /resource/confirmation/new
+  # def new
+  #   super
+  # end
+
+  # POST /resource/confirmation
+  # def create
+  #   super
+  # end
+
+  # GET /resource/confirmation?confirmation_token=abcdef
+  # def show
+  #   super
+  # end
+
+  # protected
+
+  # The path used after resending confirmation instructions.
+  # def after_resending_confirmation_instructions_path_for(resource_name)
+  #   super(resource_name)
+  # end
+
+  # The path used after confirmation.
+  # def after_confirmation_path_for(resource_name, resource)
+  #   super(resource_name, resource)
+  # end
+end