Ever wondered about Perl modules that would help you build a dependency tree in a manner similar to make? A recent PerlMonks question was also curious. Only one answer (so far) but the question plus the answer have some interesting ideas.

The answer suggested cons. cons is a very old system and I had not realized it was still active...and based on the e-mail archive, it isn't. The FAQ was last updated in 2001. This would not likely be the first place I would look.

The question itself mentioned two modules that I was unaware of: Algorithm::Dependency and Decision::Depends. The former appears to be the module with the most recent update, but the OP seems to have chosen the latter to help him solve his problem.

I've never used Plack but I've read a little about it recently. This seems like a good place to start if you want to learn more about how to use it.