pypa/pip — pull request #393 by hugobr (2011-12-04 22:32:07+00:00)
Title: Fix for issue #22 - pip search should set and return a userful shell status code

I started this a long time ago, but was not taking time to finish it. Well, now it is finished.

My idea is that we have a list of exit status code mapped and every command exits with one of those.
By now only `help` and `search` commands return an exit status from `run` method.