lib/install/stimulus_with_node.rb in stimulus-rails-0.4.1 vs lib/install/stimulus_with_node.rb in stimulus-rails-0.4.2

@@ -10,10 +10,14 @@
 end
 
 copy_file "#{__dir__}/app/javascript/controllers/hello_controller.js",
   "app/javascript/controllers/hello_controller.js"
 
-say "Import Stimulus controllers"
-append_to_file "app/javascript/application.js", %(import "./controllers"\n)
+if (Rails.root.join("app/javascript/application.js")).exist?
+  say "Import Stimulus controllers"
+  append_to_file "app/javascript/application.js", %(import "./controllers"\n)
+else
+  say %(You must import "./controllers" in your JavaScript entrypoint), :red
+end
 
 say "Install Stimulus"
 run "yarn add @hotwired/stimulus"