function heftiest {
for file in $(find app/$1/**/*.rb -type f); do wc -l $file ; done | sort -r | head
}
[jamesgolick@James-Golicks-MacBook-Pro arbitrary_project (master)]$ heftiest models
368 app/models/penguin/walrus.rb
98 app/models/penguin/orca.rb
91 app/models/wombat/chihuahua.rb
71 app/models/pokemon/pikachu.rb
69 app/models/wombat/savage.rb
69 app/models/melt_banana/its_in_the_pillcase.rb
61 app/models/foo/bar.rb
41 app/models/fake/model_name.rb
31 app/models/fake/other_model_name.rb
31 app/models/pokemon/charmander.rb
By James Golick, who appears to be working on a very peculiar project at the moment.
Update: Eric Davis wrote a similar blog post not long ago.