I’ve updated the hlean program. Aside from some cosmetic changes, documentation, and cabal package options, the main change is the segmentation fault fix. The program now correctly builds as a cabal package and runs. See hlean for a full description and usage details. You can download hlean 0.1.12 here. See the included README.txt for installation instructions.
UPDATE: hlean 0.1.2 available
I needed a program to find duplicate files in my constantly growing jungle, commonly referred to as a $HOME directory. I also needed a real motivation to sit down and write something in Haskell. After several cups of tea, I realized I could kill both birds with one heavy laser-targetting sniper rifle. After all, isn’t that what they say about Haskell: once you can get it to compile, you’re almost done?
hlean.hs is a command line program that takes any number of directories passed as arguments, recursively find all files, hashes them (defaults to sha256), and asks what to do with any duplicate sets found. It works fine for me, but since this is the first release, there are certainly some rough edges and caveats. Additionally, only you are responsible for your data; use this at your own risk: I cannot be held responsible if your computer blows up in a freak fire accident and coincidentally all the monkeys escape from the zoo.