Merging JupyterWith in Nixpkgs

[guaraqe]

I am the maintainer of JupyterWith, a system for setting up JupyterLab severs in a deterministic way using Nix, and I would like to work on a PR to merge it in Nixpkgs. This would give access to many Jupyter kernels to standard Nix users. I have been tracking my progress inside the project in this issue: tweag/jupyenv#71

I am opening this issue in order to ask some questions:

• I plan to do most of the work inside the current Jupyter folder. Is this the appropriate place for doing it?

• It may happen that we need to override some global packages so that they work correctly with Jupyter. What is the correct way for doing that? As an user, I use overlays, but this doesn't seem to make sense inside Nixpkgs. Maybe standard overrides? Should these overridden packages available only locally or also globally?

• I would like to add tests to every Jupyter kernel, which will involve running Jupyter on a sample Notebook. What would be the appropriate location for theses tests?

All feedback is welcome. As soon as I start the pull request, I will link it here.

[FRidh]

1. Yes, it's the correct folder. Do check what is there already, we should not be providing multiple implementations of the same or similar functionality. cc @aborsu
2. This is tricky. I imagine you need to override the sub packages sets for which kernels exist. Those typically provide functionality for overriding.
3. That could go in the jupyter folder, just make sure you use tiny notebooks (also no generated output).

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[guaraqe]

Closing for the moment, will reopen if needed.

[FRidh]

Just want to point out the new Jupyter Hub service here #94783.