gitonomy/gitlib — pull request #4 by ubermuda (2012-12-19 23:54:53+00:00)
Title: Fixes the process builder for bare repositories with no working dir

The --work-dir can not accept an empty string as of this commit
https://github.com/git/git/commit/3efe5d1d32fde899b23ebbb1fde499a0897e1c4e
(or maybe
https://github.com/git/git/commit/a0601dc11fab5b4525a348b2ad6c9bb92529a281,
I'm not very good at reading git's source code)