I've just released the first version of prereq-grapher, a script which generates the dependency graph for a module or script in any of the formats supported by Graph::Easy. The functionality lives in App::PrereqGrapher, which in turn uses Perl::PrereqScanner to extract dependencies.

This is a summary of the things I had to do, to add a simple test case for a script that I added to one of my distributions. It's taken over 2 elapsed days, 3 developer releases, and two sessions on IRC, to get to the end. I'm writing this up (a) so I don't forget, and (b) in case it's useful to someone else, and (c) in case the peanut gallery can point out any further gotchas I've missed.

I have published a review of CPAN modules for checking credit card numbers, using the LUHN algorithm. There are nine modules listed, with seven of them able to do a LUHN check on an arbitrary number (one of the other modules is vaporware from Steven Haryanto!)

I've also updated the review of modules for defining constants: a new version of Const::Fast was released …