Disable jbuilder for Rails API apps, meanwhile it doesn't play nicely

railties/lib/rails/generators/app_base.rb

@@ -266,6 +266,8 @@ def assets_gemfile_entry
       end
 
       def jbuilder_gemfile_entry
+        return [] if options[:api]
+
         comment = 'Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder'
         GemfileEntry.version('jbuilder', '~> 2.0', comment)
       end

railties/test/generators/api_app_generator_test.rb

@@ -37,6 +37,7 @@ def test_api_modified_files
       assert_no_match(/gem 'coffee-rails'/, content)
       assert_no_match(/gem 'jquery-rails'/, content)
       assert_no_match(/gem 'sass-rails'/, content)
+      assert_no_match(/gem 'jbuilder'/, content)
     end
 
     assert_file "config/application.rb" do |content|