add option to avoid generating scaffold.css

railties/lib/rails/generators.rb

@@ -33,6 +33,7 @@ module Generators
         scaffold_controller: '-c',
         stylesheets: '-y',
         stylesheet_engine: '-se',
+        scaffold_stylesheet: '-ss',
         template_engine: '-e',
         test_framework: '-t'
       },
@@ -56,6 +57,7 @@ module Generators
         scaffold_controller: :scaffold_controller,
         stylesheets: true,
         stylesheet_engine: :css,
+        scaffold_stylesheet: true,
         test_framework: false,
         template_engine: :erb
       }

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

@@ -10,10 +10,11 @@ class ScaffoldGenerator < ResourceGenerator # :nodoc:
       class_option :stylesheet_engine, desc: "Engine for Stylesheets"
       class_option :assets, type: :boolean
       class_option :resource_route, type: :boolean
+      class_option :scaffold_stylesheet, type: :boolean
 
       def handle_skip
         @options = @options.merge(stylesheets: false) unless options[:assets]
-        @options = @options.merge(stylesheet_engine: false) unless options[:stylesheets]
+        @options = @options.merge(stylesheet_engine: false) unless options[:stylesheets] && options[:scaffold_stylesheet]
       end
 
       hook_for :scaffold_controller, required: true

railties/test/generators/scaffold_generator_test.rb

@@ -282,6 +282,20 @@ def test_scaffold_generator_no_assets_with_switch_assets_false
     assert_no_file "app/assets/stylesheets/posts.css"
   end
 
+  def test_scaffold_generator_no_scaffold_stylesheet_with_switch_no_scaffold_stylesheet
+    run_generator [ "posts", "--no-scaffold-stylesheet" ]
+    assert_no_file "app/assets/stylesheets/scaffold.css"
+    assert_file "app/assets/javascripts/posts.js"
+    assert_file "app/assets/stylesheets/posts.css"
+  end
+
+  def test_scaffold_generator_no_scaffold_stylesheet_with_switch_scaffold_stylesheet_false
+    run_generator [ "posts", "--scaffold-stylesheet=false" ]
+    assert_no_file "app/assets/stylesheets/scaffold.css"
+    assert_file "app/assets/javascripts/posts.js"
+    assert_file "app/assets/stylesheets/posts.css"
+  end
+
   def test_scaffold_generator_with_switch_resource_route_false
     run_generator [ "posts", "--resource-route=false" ]
     assert_file "config/routes.rb" do |route|