Pip 19.1 and installing in editable mode with pyproject.toml

[pradyunsg (Pradyun Gedam)]

I agree with Nick here, on both fronts.

We don’t need to add a -E to pip for this. With my pip maintainer hat on, that’s an additional option that exists and I don’t see any strong reasoning for it so I’ll be a -1 for it.

Regarding the standardization and all, we have a better place for that conversation.

Specification of editable installation

This focuses on the long-term specification since the desicussion on solutions before it is covered in Pip 19.1 and installing in editable mode with pyproject.toml. Editable install (before 19.1, at least) works by invoking setup.py develop. Here is how (Setuptools) make it work, as I understand it (also briefly mentioned here): Creates an .egg-info in near vicinity of the package (instead of in the target site-packages). Adds an .egg-link in the target site-packages, containing paths to look…