Resurrect js/js engine options and generators

railties/lib/rails/generators.rb

@@ -35,6 +35,8 @@ module Rails
       rails: {
         actions: "-a",
         orm: "-o",
+        javascripts: "-j",
+        javascript_engine: "-je",
         resource_controller: "-c",
         scaffold_controller: "-c",
         stylesheets: "-y",

railties/lib/rails/generators/js/assets/assets_generator.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+ require "rails/generators/named_base"
+
+ module Js # :nodoc:
+  module Generators # :nodoc:
+    class AssetsGenerator < Rails::Generators::NamedBase # :nodoc:
+      source_root File.expand_path("templates", __dir__)
+
+       def copy_javascript
+        copy_file "javascript.js", File.join("app/javascript", class_path, "#{file_name}.js")
+      end
+    end
+  end
+end

railties/lib/rails/generators/rails/assets/assets_generator.rb

@@ -3,7 +3,10 @@
 module Rails
   module Generators
     class AssetsGenerator < NamedBase # :nodoc:
+      class_option :javascripts, type: :boolean, desc: "Generate JavaScripts"
       class_option :stylesheets, type: :boolean, desc: "Generate Stylesheets"
+
+      class_option :javascript_engine, desc: "Engine for JavaScripts"
       class_option :stylesheet_engine, desc: "Engine for Stylesheets"
 
       private
@@ -11,6 +14,10 @@ module Rails
           file_name
         end
 
+        hook_for :javascript_engine do |javascript_engine|
+          invoke javascript_engine, [name] if options[:javascripts]
+        end
+
         hook_for :stylesheet_engine do |stylesheet_engine|
           invoke stylesheet_engine, [name] if options[:stylesheets]
         end