pypa/pip — pull request #719 by millerdev (2012-11-05 21:46:01+00:00)
Title: Add support for relative file: URLs

This patch set adds support for installing local dependencies, which is necessary in environments where it is not possible to download dependencies from online sources such as PyPI.

See http://stackoverflow.com/q/12982406/10840
See also issue #312 which appears to have stalled. I believe this patch fixes that issue.