Prepare for Jupyter Releaser

[davidbrochart]

Closes #3285

TODO

• Format changelog so it's compatible with the releaser
• Check whether we can keep the current changelog for 8.0
• Do we want to version and release packages separately -> for now we'll version and commit separately (like for lumino)
• bumpversion / tbump for bumping the Python packages? -> tbump can be used for each of the Python packages
• Check how to handle ipywidgets depending on jupyterlab_widgets and widgetsnbextension:

  ipywidgets/setup.cfg

  Lines 42 to 43 in 441135a

  	widgetsnbextension~=4.0a0
  	jupyterlab_widgets~=2.0a0

  -> check how the releaser handles this
• Check if the releaser can skip packages already published

[github-actions]

👈 Launch a binder notebook on branch davidbrochart/ipywidgets/jupyter_releaser

[davidbrochart]

The bump-version.py script was copied over from Voilà, but I guess it has to be adapted to work here?

[davidbrochart]

I ran "Draft Changelog" on my branch. From the logs, it looks like we would need to install JupyterLab in the draft-changelog action (because bump-version.py needs jlpm)?

[jtpio]

Thanks @davidbrochart for starting this!

it looks like we would need to install JupyterLab in the draft-changelog action (because bump-version.py needs jlpm)

Or we use yarn instead of jlpm? Since ./dev-install.sh also uses it to setup the development environment.

[davidbrochart]

Actually I was missing some Jupyter Releaser hooks. But the problem is that the bump-version.py script needs lerna to be installed.

[jtpio]

Normally lerna should be installed when running yarn at the top level of the repo. So maybe we can keep that hook and run yarn instead of jlpm.

[jtpio]

@davidbrochart let's convert the PR to a draft while we iterate on it

[jtpio]

For reference the current release instructions are in https://github.com/jupyter-widgets/ipywidgets/blob/master/docs/source/dev_release.md. And it looks like the versioning is done manually by running the yarn run version command which calls lerna version:

ipywidgets/package.json

Line 26 in 441135a

"version": "yarn run clean && yarn run build && lerna version --no-push -m \"Bump version\" "

[jtpio]

Edit: moving the TODO to the top comment.

[jtpio]

OK this is kind of weird. The check seems to be canceled sometimes after 1 minute, sometimes after 5. This one for instance: https://github.com/jupyter-widgets/ipywidgets/pull/3298/checks?check_run_id=3940082517

[jtpio]

sometimes after 1 minute, sometimes after 5

1 minute is probably because of ef786ca which removed the explicit install step. But it's strange that it is canceled instead of exiting on error.

[davidbrochart]

Isn't it because when link_check fails, it cancels check_release?

[jtpio]

Ah right, we are not using fail-fast: false for now: https://docs.github.com/en/actions/learn-github-actions/workflow-syntax-for-github-actions#jobsjob_idstrategyfail-fast

We can set it for now so it's easier to debug.