Pip picks up .egg-info from sub-folders in -e mode

Environment

• pip version: 10.0.1
• Python version: 3.6 (running in a conda env)
• OS: Windows

Description When I try to install my own package in -e mode, pip instead tries to install the dependencies of another package in a sub-folder of the current directory.

Pip behaves fine in non-development mode.

Expected behavior Pip should resolve the correct package obviously.

How to Reproduce I have a minimal example to demonstrate the issue.

Run pip -e ., and pip will install numpy, instead of mypkg and attrs.

Additional info It seems that pip picks up an *.egg-info that happens to be located exactly one level below the current directory. It then tries to resolve the dependencies indicated there. In my case, I grabbed the egg-info from pyqtgraph.

My project does not use the usual directory layout (where setup.py is located next to a folder named after the package, containing the source code). I don’t see how this would be an issue though.

[sbidoul]

@polwel This should be resolved in pip master following https://github.com/pypa/pip/pull/7978

[chrahunt]

The problem is using the “src” directory layout. Currently we determine where the generated *.egg-info file is based on a traversal of the source tree. If more than one *.egg-info found then we take the first ordered by number of leading directories. Since your .egg-info ends up in src, it doesn’t necessarily have precedence over the one in pyqtgraph.

Does anyone know why we aren’t passing an explicit --egg-base to setup.py egg_info so we know for sure where the .egg-info directory is being created?