Do not show --webpack option in the plugin help message

railties/lib/rails/generators/app_base.rb

@@ -13,7 +13,6 @@ class AppBase < Base # :nodoc:
       DATABASES = %w( mysql postgresql sqlite3 oracle frontbase ibm_db sqlserver )
       JDBC_DATABASES = %w( jdbcmysql jdbcsqlite3 jdbcpostgresql jdbc )
       DATABASES.concat(JDBC_DATABASES)
-      WEBPACKS = %w( react vue angular )
 
       attr_accessor :rails_template
       add_shebang_option!
@@ -31,9 +30,6 @@ def self.add_shared_options_for(name)
         class_option :database,           type: :string, aliases: "-d", default: "sqlite3",
                                           desc: "Preconfigure for selected database (options: #{DATABASES.join('/')})"
 
-        class_option :webpack,            type: :string, default: nil,
-                                          desc: "Preconfigure for app-like JavaScript with Webpack (options: #{WEBPACKS.join('/')})"
-
         class_option :skip_yarn,          type: :boolean, default: false,
                                           desc: "Don't use Yarn for managing JavaScript dependencies"
 

railties/lib/rails/generators/rails/app/app_generator.rb

@@ -205,6 +205,8 @@ module Generators
     RESERVED_NAMES = %w[application destroy plugin runner test]
 
     class AppGenerator < AppBase # :nodoc:
+      WEBPACKS = %w( react vue angular )
+
       add_shared_options_for "application"
 
       # Add bin/rails options
@@ -217,6 +219,9 @@ class AppGenerator < AppBase # :nodoc:
       class_option :skip_bundle, type: :boolean, aliases: "-B", default: false,
                                  desc: "Don't run bundle install"
 
+      class_option :webpack, type: :string, default: nil,
+                             desc: "Preconfigure for app-like JavaScript with Webpack (options: #{WEBPACKS.join('/')})"
+
       def initialize(*args)
         super