Can't pip install .[extra]

[habnabit]

It is possible to do pip install -e .[extra] (i.e. install the CWD with the specified extra), but not possible to do pip install .[extra]. The latter command will attempt to fetch the package called . from pypi.

[habnabit]

As a note, one can do e.g. pip install file://$(pwd)#egg=whatever[extra] and that will successfully install.

[tomprince]

This is a duplicate of #1236.

[Ivoz]

Thanks, closing to avoid the duplication, although still a valid bug.