How to prevent all JS from compiling into app.js?

[vidurbhatnagar]

We are using the generator-m-ionic for a large project that is being built into an android and ios app successfully. We are now planning to serve the same ionic-code as a website via a node.js server as well.

However, when we serve the WWW folder via node.js, the entire app.js (which has the JS code for all of our 20+ controllers) is sent to the client on serving just the login page. With substantial proprietary client side-code, we would like to only serve the login.js controller with login.html and then serve the entire app.js (for all other controllers) post successful login.

What changes would be required in the gulp configuration to achieve the same?
Thanks!