Feature request: local git dependencies

[patrick-kidger]

uv doesn't seem to support local git dependencies:

https://github.com/astral-sh/uv/blob/7688f464c8377f7d4c67c371f0aa9550bb0b86ac/crates/distribution-types/src/lib.rs#L312

e.g.

foo_lib==git+file://../foo_lib#egg=foo_lib-3.1.4

It'd be awesome if this was supported, as we have cases in which multiple libraries all sit inside the same git repo, as sibling folders. (In this scenario I think there should probably be no or minimal caching from uv, since git already has a copy anyway.)

I should acknowledge that we are able to work around this by spinning up a local server and serving it as a URL dependency:

foo_lib @ http://localhost:8000/foo_lib-3.1.4-py3-none-any.whl

the main downside is just that this is (I assume) a lot slower.

Thank you for the excellent tool!