Extract components of posy?

[DanCardin]

I'm currently noodling around with my own rust python tool and noticed you have at least a few things implemented here that would be relatively core to any such rust tools.

For example I'm currently dealing with package specifier parsing.

I'd very much prefer not to reimplement that sort of thing if it's already written in rust, thus I'm curious if you'd be interested in any sort of librarification of some of posy's component parts?

Relatedly either way, I see a MIT or Apache2 bit in your Cargo.toml, but no actual LICENSE file. I'm not sure whether that makes an actual difference or not.

[DanCardin]

I've just seen https://github.com/prefix-dev/rip, which seems likely to essentially resolve this issue