[coffeescript] Omitting wrapper on a per-file basis, or, returning from global scope

Firstly, season's greetings to you! Hope you had/are having a great holiday.

I'm writing some CoffeeScript to be executed in a MongoDB server environment, and MongoDB requires returns values to be returned from the global scope. ie, a very simple file would be:

return args.str.toUpperCase()

I can't seem to do that in CoffeeScript though. I know about --bare, but I'm using Gulp and I'd rather not mess with that setup.

Is there any way to either omit the wrapper on a per-file basis, or alternatively return from the global scope?

>  I know about --bare, but I'm using Gulp and I'd rather not mess with that setup.

I think you are stuck with that as the only option.