How to hook up Lua unit tests with build system (Scons)?

[Jonas Bengtsson <jonas.b@...>]

I'm building my C++ project using Scons, and now I'd like to hook up my 
Lua unit tests so that they are run at the same time. Does anyone have 
any suggestions?

The main feature I'd like is to only run the tests when needed, so that 
basically means detecting dependencies between .lua files and preferably 
C extension modules as well.

If anyone knows how to do it in Scons that would be ideal, but if 
there's another build tool that has the support it might be possible to 
integrate with Scons, or I could just switch build tool altogether (but 
I hope I won't have to).

Thanks in advance,
Jonas