[dheera]

> one env per project

That causes 50 copies of the exact same version of a 1GB library to exist on my system that are all obtained from the same authority (PyPI). I have literally 50 copies of the entire set of CUDA libraries because every conda environment installs PyTorch and PyTorch includes its own CUDA.

I'm not asking the OS to maintain this, but rather the package manager ("npm" or "pip" or similar) should do so on a system-wide basis. "python" and "pip" should allow for 1 copy per officially-released version of each package to live on the system, and multiple officially-released version numbers to coexist in /usr/lib. If a dev version is being used or any version that deviates from what is on PyPI, then that should live within the project.

[skeledrew]

Actually conda creates hardlinks for the packages that it manages. Found this out a few weeks ago when I tried migrating my envs to another system with an identical hierarchy and ended up with a broken mess.

[forrestthewoods]

> but rather the package manager ("npm" or "pip" or similar) should do so on a system-wide basis.

I basically agree with this. With the caveat that programs should not use any system search paths and packages should be hardlinked into the project directory structure from a centralized cache. This also means that a dev version looks identical to a centralized version - both are just directories within the project.

[bomewish]

Are you just describing something close to Nix?? In any case, Nix solves a lot of these problems.

[forrestthewoods]

Kind of, but not really. Nix is extremely complicated. Programs / projects including their dependencies is exceedingly simple.

Also, Windows is my primary dev environment. Any solution must work cross-platform and cross-distro. Telling everyone to use a specific distro is not a solution.

[bomewish]

It is complicated... but honestly I have found claude 3.5 to just 'fix it'. So you hardly have to spend much time spelunking. You just give it all your dependencies and tell it what you want. It'll whip up a working flake in a few iterations. Kinda magic. So yeah when you can abstract out the complexity it moves the needle enough to make it worth it.

[xyzsparetimexyz]

Nix != NixOS. It runs on WSL: https://github.com/nix-community/NixOS-WSL

[forrestthewoods]

Less than zero interest in WSL.

Nix fans are becoming as obnoxious as Rust fans. And I say that as an times annoying Rust fan.

[BiteCode_dev]

Ah, sorry I misunderstood.

Yes, it would be nice to have that by default.

In fact, it's what uv (https://github.com/astral-sh/uv) does, and one of the reasons it's so fast and became so popular so quickly.

Astral for the win.

[olejorgenb]

I don't think that's true for the exact same version: https://stackoverflow.com/a/57718049 (ie. it's deduplicated)