Poetry uninstalls all dependencies when removing any dependency via poetry remove

[provinzkraut]

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Ubuntu 20.04.3
• Poetry version: 1.2.0a2
• Python version: 3.10.0
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/provinzkraut/b0522eae0003f71c9767ca7a2ce93ee0

Issue

When removing a dependency via poetry remove, poetry will uninstall every dependency in the pyproject.toml. It will however not remove them from pyproject.toml. This behavior exists for packages without any interdependence whatsoever.

Output of running poetry remove tqdm -vvv on the provided pyproject.toml:

Loading configuration file ~/.config/pypoetry/config.toml
Using virtualenv: ~/.cache/pypoetry/virtualenvs/poetry-test-y2U66Zct-py3.10
Updating dependencies
Resolving dependencies...
   1: fact: poetry-test is 0.1.0
   1: derived: poetry-test
   1: selecting poetry-test (0.1.0)
   1: Version solving took 0.003 seconds.
   1: Tried 1 solutions.

Writing lock file

Finding the necessary packages for the current system

Package operations: 0 installs, 0 updates, 2 removals

  • Removing dnspython (2.1.0): Pending...
  • Removing dnspython (2.1.0): Removing...
  • Removing dnspython (2.1.0)
  • Removing tqdm (4.62.3): Pending...
  • Removing tqdm (4.62.3): Removing...
  • Removing tqdm (4.62.3)

A subsequent poetry update will re-install all previously unnecessarily removed packages.

[timw]

I think I'm observing this in 1.2.0a2 when removing a plugin as well:

e.g.

$ poetry plugin add poetry-grpc-plugin
... normal install log ...
$ poetry plugin remove poetry-grpc-plugin
... removes everything including poetry-core ...
$ poetry
Traceback (most recent call last):
  File "/usr/local/bin/poetry", line 5, in <module>
    from poetry.console.application import main
  File "/usr/local/lib/python3.9/site-packages/poetry/console/application.py", line 12, in <module>
    from cleo.application import Application as BaseApplication
ModuleNotFoundError: No module named 'cleo'

To be clear, this results in poetry effectively uninstalling itself, as it removes all required modules from the global venv.

[swirle13]

I'm also observing this in 1.2.0a2

I've generally interrupted the uninstall process before it completed, so I'm unsure if mine would also uninstall all the way down through poetry-core but I can confirm I'm also seeing all dependencies removed and pyproject.toml not removing any dependencies.

[nikokaoja]

This is still an issue in Poetry (version 1.2.0a2) , when removing a specific package all packages are removed.

[thomasjo]

This is still an issue in Poetry (version 1.2.0a2) , when removing a specific package all packages are removed.

@nikokaoja You need to install Poetry 1.2.0b1. Only the latest (beta) release has the required poetry-core dependency that contains the bug fix.

For reference: poetry-core 1.1.0a7 (and newer) contains the relevant fix.

[github-actions]

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