Move from poetry and just to pixi

[s3alfisc]

My fingers itched a bit so I played around with pixi=)

This PR is really just a "proof of concept". It does two things:

1. Transitions pyfixest from using poetry to using pixi for package management.
2. Moves several tasks from the just file to pixi tasks.

For me, the environment currently works "as is", but:

• all packages are installed from conda, which means we will not be able to host on PyPi. We need to explicitly tell pixi to install from PyPi
• I currently cannot install wildboottest because of a version conflict (?, not sure where this stems from), so the tests fail.
• In principle, I think that you should be able to type pixi run tests-regular and all dev dependencies will be installed in a "test" env + the unit tests will run.
• Some other minor things I couldn't figure out, e.g. how I add more than one package author?

[juanitorduz]

Cool! I'll take a look tomorrow 🚀

[juanitorduz]

Just some questions

[juanitorduz]

Don't we need the runtime dependencies here? See https://github.com/ericmjl/llamabot/blob/main/pyproject.toml (from the author of https://ericmjl.github.io/blog/2024/8/16/its-time-to-try-out-pixi/). I am not 100% sure about it.

[s3alfisc]

lets-plot cannot be installed from conda, so I added it via pixi add lets_plot --pypi, which placed it there in the toml. I think (but am not sure) that this is where pixi places all non-conda deps?

[juanitorduz]

I currently cannot install wildboottes because of a version conflict

Could it be the poetry dependency in https://github.com/py-econometrics/wildboottest/blob/fd72d390f441c9093b9fbb587edb747c17e97953/pyproject.toml#L24-L32 ?

[s3alfisc]

@juanitorduz, I think this is ready now, minus the wildboottest dependency:

pixi add --pypi --feature dev wildboottest==0.3.1

leads to a memory error

[juanitorduz]

leads to a memory error

weird 🤔 Does it also happen with a fresh env with Poetry?

[juanitorduz]

Looks good! Just left some small comments and suggestions

[juanitorduz]

@s3alfisc I can not install it in my Mac

> pixi shell
  × The current platform does not satisfy the minimal virtual package requirements
  ╰─▶ the project does not support 'osx-arm64'

I think we need to add both mac platforms as in https://github.com/ericmjl/llamabot/blob/main/pyproject.toml#L118

we currently have

platforms = ["linux-64", "win-64"]

We need

platforms = ["osx-arm64", "linux-64", "osx-64", "win-64"]

[s3alfisc]

Thanks @juanitorduz, just added mac support in the last commit

[juanitorduz]

I tested locally and it the installation works! I also ran pixi run lint and pixi run test and both work as expected!

[s3alfisc]

Perfect, thank you!