improvement: poetry package list support for v2

[robd518]

Fixes #7090

📝 Summary

Poetry 1.x and 2.x handle the poetry show command differently. The current PoetryPackageManager implementation is fine but with the release of Poetry 2.0 in January the current implementation breaks. This PR will fix issue #7090 - and as a side benefit - improve the PoetryPackageManager class.

🔍 Description of Changes

Poetry version detection:

The manager now detects the installed Poetry version (1.x vs 2.x) at runtime.

Adaptive command generation:

• For Poetry 1.x, use poetry show --no-dev.
  • If no dev dependencies exist, this command still succeeds.
• For Poetry 2.x, attempt poetry show --without dev.
  • If the command succeeds, we use its output.
  • If it fails with Group(s) not found, this indicates that no dev group is defined — in that case, fall back to poetry show to capture all installed packages.

Fallback behavior:

If version detection or command inference fails for any reason, default gracefully to poetry show.

This ensures PoetryPackageManager works consistently across Poetry versions 1.x → 2.x and avoids breaking when no dependency groups are defined.

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable).
• I have added tests for the changes made.
• I have run the code and verified that it works as expected.

[robd518]

I have read the CLA Document and I hereby sign the CLA

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Project	Deployment	Preview	Comments	Updated (UTC)
marimo-docs	Ready	Preview	Comment	Nov 15, 2025 9:26pm

[dmadisetti]

Thanks for the tests! LGTM

[dmadisetti]

Actually, would you mind grabbing the lint errors that popped up? You can run make py-check locally? Also left a suggestion if you just want to apply that, but needs an additional change to go with

[robd518]

Hey @dmadisetti 👋 I think I've handled them but please let me know. I'm still trying to familiarize myself with the dev environment so let me know if there's something I'm missing!

[dmadisetti]

@robd518 I think that was the only issue (which is now fine)
I'm good with this once we handle the -1 !!
Thanks! Hope this has been working for you

[robd518]

@dmadisetti If you're referring to this line, I believe it's committed and ready to go but let me know if you're seeing seomthing different or if I'm just missing something. :)

[dmadisetti]

Hey, sorry this slipped. LGTM