Pixi / py-rattler support

[lucascolley]

It would be cool for nox to have support for Pixi, in a similar vein to its support to uv.

This isn't a full proposal, just thought I would open an issue while it is on my mind. @henryiii maybe you have thought about this already?

[henryiii]

Yes, I even was talking to @ruben-arts and @wolfv about this at SciPy less than two weeks ago. What we need is a low level interface which currently doesn't (exactly¹) exist. It sounds like it might, soon, though.

There's also the idea that we would have a higher-level "environment" model in the future, and that could support locked/external environments, which could integrate with the high level interfaces of pixi (and uv, poetry, etc). That's something I've got ideas for but no time for quite a while.

Footnotes

1. I think there's a way to do it with rattler, but we are talking about the single binary pixi. :) ↩

[lucascolley]

I think there's a way to do it with rattler

I guess you are alluding to something like airspeed-velocity/asv#1445 ?

[henryiii]

Yes, pretty sure that's it (py-rattler). Since we now support adding requirements, we could add support for it separately from supporting pixi.