Suggestion: git clone should warn if repository has submodules

Submodules are great, and I used them at work. The problem is, people wind up cloning my repos without --recursive and then nothing works for them, because the submodules weren't populated and those ultimately are needed to build my code.

I can see why --recursive isn't the default for git clone; you don't want to just blindly follow whatever urls are in .gitmodules without the user being aware of the possibility. That said, folks that are not familiar with submodules (which seems to be most of the people I work with!) wind up confused by this and don't know how to fix it.

While the burden is on the user and should remain so, it seems like having git print out a message after cloning to the effect of "there are submodules that are not populated, maybe you should look at them" would go a long way to eliminating confusion for newer users. Yes, I have put some documentation in my project that users should fetch the submodules, but if possible, I'd like lower the number of times I have to suggest that people RTFM.

Alternatively, is it preferable that I have my build system look at the submodules and inform the user more helpfully? I'm curious to know what, if any, is the recommended procedure.

Cheers, Jason