Editable install support

[henryiii]

Yesterday, pip 21.3 dropped with PEP 660. What's the status of support here?

[FFY00]

No support here yet. My plan was to create a custom loader (https://docs.python.org/3/library/importlib.html#importlib.abc.TraversableResources) that would run the build process when anyone tries to access the files provided by the package, with optional optimizations to only run the required build tasks.

[FlorianWilhelm]

Awesome project! Thanks for your great work. This is potentially a great alternative to flit and with editable install support it will get closer to this goal. CC @abravalheri