Make sure definitions are only generated for ESM module. Fixes 316.

CHANGELOG.md

@@ -11,6 +11,8 @@ nft_path(123456789012345678901234567890n)
     // => /nfts/123456789012345678901234567890
 ```
 
+* Fix rake task for non-esm modules. [#316](https://github.com/railsware/js-routes/issues/316)
+
 ## [2.3.4]
 
 * Fix deprecator usage in `rake js:routes:typescript` [#327](https://github.com/railsware/js-routes/issues/327)

lib/js_routes.rb

@@ -37,8 +37,11 @@ def generate(**opts)
 
     sig { params(file_name: FileName, typed: T::Boolean, opts: T.untyped).void }
     def generate!(file_name = configuration.file, typed: false, **opts)
-      Instance.new(file: file_name, **opts).generate!
-      definitions!(file_name, **opts) if typed
+      instance = Instance.new(file: file_name, **opts)
+      instance.generate!
+      if typed && instance.configuration.modern?
+        definitions!(file_name, **opts)
+      end
     end
 
     sig { params(file_name: FileName, opts: T.untyped).void }

spec/js_routes/zzz_after_initialization_spec.rb

@@ -110,6 +110,17 @@ def file_content
       expect(File.exist?(file)).to be(true)
       expect(File.exist?(dir.join('typed_routes.d.ts'))).to be(true)
     end
+
+    it "skips definitions if module is not ESM" do
+      file = dir.join('typed_routes.js')
+      definitions = dir.join('typed_routes.d.ts')
+      JsRoutes.remove!(file)
+      expect(File.exist?(file)).to be(false)
+      expect(File.exist?(definitions)).to be(false)
+      JsRoutes.generate!(file, module_type: nil, typed: true)
+      expect(File.exist?(file)).to be(true)
+      expect(File.exist?(definitions)).to be(false)
+    end
   end