Use hatch backend

[blink1073]

Simplified version of #845 until we decided whether to adopt hatch_jupyter_builder, to get editable mode working again. cf pypa/pip#11110

[codecov-commenter]

Codecov Report

Merging #846 (e37c681) into main (9bd9bdc) will decrease coverage by 1.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #846      +/-   ##
==========================================
- Coverage   70.04%   68.98%   -1.07%     
==========================================
  Files          63       63              
  Lines        7568     7309     -259     
  Branches     1262     1208      -54     
==========================================
- Hits         5301     5042     -259     
+ Misses       1888     1887       -1     
- Partials      379      380       +1     

Impacted Files	Coverage Δ
jupyter_server/extension/handler.py	62.50% <0.00%> (-4.69%)	⬇️
jupyter_server/gateway/gateway_client.py	71.69% <0.00%> (-3.58%)	⬇️
jupyter_server/base/handlers.py	61.31% <0.00%> (-2.48%)	⬇️
jupyter_server/files/handlers.py	32.14% <0.00%> (-2.34%)	⬇️
jupyter_server/auth/login.py	68.93% <0.00%> (-1.99%)	⬇️
jupyter_server/services/shutdown.py	75.00% <0.00%> (-1.93%)	⬇️
jupyter_server/pytest_plugin.py	87.30% <0.00%> (-1.79%)	⬇️
jupyter_server/base/zmqhandlers.py	52.43% <0.00%> (-1.54%)	⬇️
jupyter_server/extension/application.py	71.69% <0.00%> (-1.40%)	⬇️
jupyter_server/serverapp.py	63.68% <0.00%> (-1.39%)	⬇️
... and 23 more

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[maartenbreddels]

Hi,

interesting. Are there notes, or could you share the reasoning behind switching from flit to hatch?

cheers,

Maarten

[blink1073]

Hi @maartenbreddels, see jupyter/nbconvert#1777

[blink1073]

Basically it gives us a lot more flexibility, including multiple top level entities, which is needed for ipykernel (to include ipykernel_launcher.py), cf ipython/ipykernel#931

[blink1073]

Help output test failures are due to #843, will focus on getting a traitlets release out now.

[maartenbreddels]

Thanks!
Always keeping an eye on what you are doing regarding CI etc, love it :)

[blink1073]

Always keeping an eye on what you are doing regarding CI etc, love it :)

Thank you! ❤️