Builder drops file extension when js module is imported from jsx module.

This project illustrates SystemJS Build Tool 0.14.11 issue #413.

There is a package test-app that sits in lib folder and consists of two modules main.jsx and module.js. Module module.js is imported into main.jsx module. In development mode (files are loaded separately to browser) SystemJS loads both modules as expected with correct extensions.

During build of self-executing bundle SystemJS builder is looking for lib/module file instead of lib/module.js. It is only reproducible when both defaultExtension: false option is set and path to package is specified in paths option. Particularly, when renaming lib folder to test-app and removing its entry from paths build passes successfully.

Pay attention that SystemJS and SystemJS Build Tool both work with the same configuration, but first handles it correctly and second fails.

Usage of this example

1. Install application:

  npm install

2. Launch development server:

  npm start

Open http://localhost:9001 in browser. Everything works fine in development mode.

3. Launch build:

  npm run build

It should create a self-executing bundle... but SystemJS builder fails with ENOENT error :(

In case error is fixed, continue to next step.

4. Launch production server:

  npm run prod

Open http://localhost:9009 in browser. Output should be the same as on step 2.