There is a new option in cpanspec 1.66 (which should land in Extras soon), --follow. The next time you need to build a package for a module, you might want to try something like this:

cpanspec -v --follow Some::Module

When you specify --follow, cpanspec checks every BuildRequires that can be automatically determined from the module to see if it is available on the system ("rpm -q --whatprovides perl($module)") or in the configured repositories ("repoquery --whatprovides perl($module)"). If not, it adds it to the list of modules to process.

I just tried this with OpenFrame (something I manually built all the dependencies for a while back), and it looks like I'm down to 5 required modules that aren't in Extras already.

Steve