Flog reports the most tortured code in an easy to read pain report. The higher the score, the more pain the code is in (and harder it is to test).
% ./bin/flog -g lib Total Flog = 1097.2 (17.4 flog / method) 323.8: Flog total 85.3: Flog#output_details 61.9: Flog#process_iter 53.7: Flog#parse_options ...
gem install flogIf you want to hack on flog, clone it from GitHub:
git clone git://github.com/seattlerb/flog