Looking for a project to create a new project generator

The project generators I've seen offer their own templates, file structures, and options.

But I need a generator that would use my project templates, allow me to merge different projects together, and produce a single result. It's like a smart project merger.

For example, I have a project with a grps-server and a project with a rest-service. As a result, I want a generator with a choice of options: add grps, add rest.

I understand that simply merging projects isn't possible; analytics are needed. What I'm looking for should have rules for merging different projects.

Are there any generators for project generators?