It is a command line tool to calculate Hits-of-Code metric in a source code repository (at the moment we support Git 2+ and Subversion 1.7+). You can read more about Hits-of-Code metric in this blog post: Hits-of-Code Instead of SLoC.

You can also use hitsofcode.com by Valentin Brandl, if you want to have a badge in your repo.

Install it first:

$ gem install hoc

Run it locally and read its output:

$ hoc --help

For Subversion statistics you must have diffstat installed.

Read these guidelines. Make sure you build is green before you contribute your pull request. You will need to have Ruby 2.3+ and Bundler installed. Then:

$ bundle update
$ bundle exec rake

If it's clean and you don't see any error messages, submit your pull request.