lib/generators/react/install_generator.rb in react-rails-3.1.1 vs lib/generators/react/install_generator.rb in react-rails-3.2.0

@@ -101,11 +101,22 @@
         var componentRequireContext = require.context("components", true);
         var ReactRailsUJS = require("react_ujs");
         ReactRailsUJS.useContext(componentRequireContext);
       JS
 
+      def require_package_json_gem
+        require "bundler/inline"
+
+        gemfile(true) { gem "package_json" }
+
+        puts "using package_json v#{PackageJson::VERSION}"
+      end
+
       def setup_react_shakapacker
-        `yarn add react_ujs`
+        require_package_json_gem
+
+        PackageJson.read.manager.add(["react_ujs"])
+
         if manifest.exist?
           append_file(manifest, SHAKAPACKER_SETUP_UJS)
         else
           create_file(manifest, SHAKAPACKER_SETUP_UJS)
         end