Would like a way to exclude aggregator modules

[chris-martin]

I have a root project that aggregates several modules in its subdirectories. I don't need an Idea module for the root project, but because gen-idea creates one, IntelliJ sees every source file twice --- once in the module to which the file actually belongs, and again as a child of the root module. This is a problem because the editor doesn't work correctly if I open the wrong version (because the root project doesn't have the same dependencies).

As a workaround, I can delete the root module from IntelliJ, but it's annoying because I have to do this every time I run gen-idea.