Add --no-html to scaffold generator

railties/lib/rails/generators/rails/scaffold/scaffold_generator.rb

@@ -9,6 +9,15 @@ module Rails
       class_option :stylesheets, type: :boolean, desc: "Generate Stylesheets"
       class_option :stylesheet_engine, desc: "Engine for Stylesheets"
 
+      class_option :html, type: :boolean, default: true,
+                          desc: "Generate a scaffold with HTML output"
+
+      def handle_skip
+        if !options[:html] || !options[:stylesheets]
+          @options = @options.merge(stylesheet_engine: false)
+        end
+      end
+
       hook_for :scaffold_controller, required: true
 
       hook_for :assets do |assets|
@@ -16,7 +25,9 @@ module Rails
       end
 
       hook_for :stylesheet_engine do |stylesheet_engine|
-        invoke stylesheet_engine, [controller_name] if options[:stylesheets] && behavior == :invoke
+        if behavior == :invoke
+          invoke stylesheet_engine, [controller_name]
+        end
       end
     end
   end

railties/lib/rails/generators/rails/scaffold_controller/scaffold_controller_generator.rb

@@ -10,8 +10,17 @@ module Rails
       class_option :orm, banner: "NAME", type: :string, required: true,
                          desc: "ORM to generate the controller for"
 
+      class_option :html, type: :boolean, default: true,
+                          desc: "Generate a scaffold with HTML output"
+
       argument :attributes, type: :array, default: [], banner: "field:type field:type"
 
+      def handle_skip
+        unless options[:html]
+          @options = @options.merge(template_engine: false, helper: false)
+        end
+      end
+
       def create_controller_files
         template "controller.rb", File.join('app/controllers', class_path, "#{controller_file_name}_controller.rb")
       end

railties/lib/rails/generators/rails/scaffold_controller/templates/controller.rb

@@ -12,7 +12,7 @@ class <%= controller_class_name %>Controller < ApplicationController
     @<%= plural_table_name %> = <%= orm_class.all(class_name) %>
 
     respond_to do |format|
-      format.html # index.html.erb
+      <%- if options[:html] -%>format.html # index.html.erb<%- end -%>
       format.json { render json: <%= "@#{plural_table_name}" %> }
     end
   end
@@ -21,11 +21,12 @@ class <%= controller_class_name %>Controller < ApplicationController
   # GET <%= route_url %>/1.json
   def show
     respond_to do |format|
-      format.html # show.html.erb
+      <%- if options[:html] -%>format.html # show.html.erb<%- end -%>
       format.json { render json: <%= "@#{singular_table_name}" %> }
     end
   end
 
+  <%- if options[:html] -%>
   # GET <%= route_url %>/new
   # GET <%= route_url %>/new.json
   def new
@@ -40,6 +41,7 @@ class <%= controller_class_name %>Controller < ApplicationController
   # GET <%= route_url %>/1/edit
   def edit
   end
+  <%- end -%>
 
   # POST <%= route_url %>
   # POST <%= route_url %>.json
@@ -48,10 +50,12 @@ class <%= controller_class_name %>Controller < ApplicationController
 
     respond_to do |format|
       if @<%= orm_instance.save %>
+        <%- if options[:html] -%>
         format.html { redirect_to @<%= singular_table_name %>, notice: <%= "'#{human_name} was successfully created.'" %> }
+        <%- end -%>
         format.json { render json: <%= "@#{singular_table_name}" %>, status: :created, location: <%= "@#{singular_table_name}" %> }
       else
-        format.html { render action: "new" }
+        <%- if options[:html] -%>format.html { render action: "new" }<%- end -%>
         format.json { render json: <%= "@#{orm_instance.errors}" %>, status: :unprocessable_entity }
       end
     end
@@ -62,10 +66,12 @@ class <%= controller_class_name %>Controller < ApplicationController
   def update
     respond_to do |format|
       if @<%= orm_instance.update_attributes("#{singular_table_name}_params") %>
+        <%- if options[:html] -%>
         format.html { redirect_to @<%= singular_table_name %>, notice: <%= "'#{human_name} was successfully updated.'" %> }
+        <%- end -%>
         format.json { head :no_content }
       else
-        format.html { render action: "edit" }
+        <%- if options[:html] -%>format.html { render action: "edit" }<%- end -%>
         format.json { render json: <%= "@#{orm_instance.errors}" %>, status: :unprocessable_entity }
       end
     end
@@ -77,7 +83,7 @@ class <%= controller_class_name %>Controller < ApplicationController
     @<%= orm_instance.destroy %>
 
     respond_to do |format|
-      format.html { redirect_to <%= index_helper %>_url }
+      <%- if options[:html] -%>format.html { redirect_to <%= index_helper %>_url }<%- end -%>
       format.json { head :no_content }
     end
   end
@@ -88,8 +94,11 @@ class <%= controller_class_name %>Controller < ApplicationController
       @<%= singular_table_name %> = <%= orm_class.find(class_name, "params[:id]") %>
     end
 
-    # Use this method to whitelist the permissible parameters. Example: params.require(:person).permit(:name, :age)
-    # Also, you can specialize this method with per-user checking of permissible attributes.
+    # Use this method to whitelist the permissible parameters. Example:
+    #   params.require(:person).permit(:name, :age)
+    #
+    # Also, you can specialize this method with per-user checking of permissible
+    # attributes.
     def <%= "#{singular_table_name}_params" %>
       <%- if attributes_names.empty? -%>
       params[<%= ":#{singular_table_name}" %>]

railties/test/generators/scaffold_controller_generator_test.rb

@@ -127,6 +127,18 @@ class ScaffoldControllerGeneratorTest < Rails::Generators::TestCase
     assert_no_file "app/views/layouts/users.html.erb"
   end
 
+  def test_skip_html_if_required
+    run_generator [ "User", "name:string", "age:integer", "--no-html" ]
+    assert_no_file "app/helpers/users_helper.rb"
+    assert_no_file "app/views/users"
+
+    assert_file "app/controllers/users_controller.rb" do |content|
+      assert_no_match(/format\.html/, content)
+      assert_no_match(/def edit/, content)
+      assert_no_match(/def new/, content)
+    end
+  end
+
   def test_default_orm_is_used
     run_generator ["User", "--orm=unknown"]
 

railties/test/generators/scaffold_generator_test.rb

@@ -257,6 +257,11 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
     assert_no_file "app/assets/stylesheets/posts.css"
   end
 
+  def test_scaffold_generator_no_html
+    run_generator [ "posts", "--no-html" ]
+    assert_no_file "app/assets/stylesheets/scaffold.css"
+  end
+
   def test_scaffold_generator_no_javascripts
     run_generator [ "posts", "--no-javascripts" ]
     assert_file "app/assets/stylesheets/scaffold.css"