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

[polwel]

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.

[pradyunsg]

Hey @polwel! Thanks for filing this issue.

Could you provide the output of pip install --verbose -e .?

[polwel]

I am currently out of office, I will get back to you in the coming days.

[pradyunsg]

Sure thing. No hurries. :)

[polwel]

Here you go: output.txt.

[pradyunsg]

Does pip 9.0.3 also behave in the same way?

[polwel]

Yes, it also occurs with pip 9.0.3.