Adopt hatchling, plugins for python package build

[bollwyvl]

References

• fixes Modernize packaging infrastructure #370

Elevator Pitch

• adopt hatchling and some plugins:
  • hatch-jupyter-builder handles the jlpm junk
  • hatch-nodejs-version fetches metadata from package.json
• normalize dependencies and metadata

  • docs/requirements.txt left to avoid node on RTD

• add CI caching
• quick pass over user/dev docs
• normalize the etc folders with their destination structure

  • didn't do this for the nb/labextension due to path lengths (e.g. windows)

[ofek]

hey! just FYI this is always excluded

[consideRatio]

Thank you soo much for your work on this @bollwyvl!!!

Overall this LGTM but there was some changes I wished for with associated code suggestions.

1. Removal of set -eux
2. Removal of cache for python packages (but not for installing yarn.lock)
3. Revert addition of jupyter-server-proxy[docs] as a pip install target

[bollwyvl]

In doing this, I'd recommend as well that we add a .binder/{environment.yml,postBuild} that exercises as much of this as possible, as well as the contrib stuff, but that can be another day.

[consideRatio]

Besides the final comment, this LGTM!

Do you consider this ready for merge as well at this point @bollwyvl?

[bollwyvl]

Yes, I've no further changes planned once it passes CI.

Run mkdir jsdist
  mkdir jsdist
  cd labextension
  jlpm pack --filename ../jsdist/labextension-jlpmpack.tgz
  cd ../jsdist && sha256sum * | tee SHA256SUMS
  shell: /usr/bin/bash -e {0}
/home/runner/work/_temp/395963e9-5a5b-4889-943b-08c64b11e3e6.sh: line 3: jlpm: command not found

I'll change this to just use npm pack.

[bollwyvl]

Publish is passing, so this is probably good. Happy to make any other fixes, or let others do so... feel free to squash merge.

[consideRatio]

Wiee nice thank you @bollwyvl!!! Super happy about this being modernized!!

I went for a normal merge as I think a few jupyterhub team members prefer we use that consistently.