[1.2.0a2] `poetry plugin remove` uninstalls poetry itself

• I am using the 1.2.0a2 pre-release (i.e. not latest (1.1.7))
• 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: Linux #71-Ubuntu SMP Tue Jul 13 15:59:12 UTC 2021
• Poetry version: 1.2.0a2
• Link of a Gist with the contents of your pyproject.toml file: Not applicable

📝 If you track pre-release issues elsewhere and this is a known problem, then please close this issue 😃

Issue

tl;dr: poetry plugin remove <plugin> uninstalls poetry itself from $POETRY_HOME/venv, presumably because poetry is a dependency of plugins. This leaves a broken installation of poetry, requiring reinstall from install-poetry.py.

Steps to reproduce

📝 The steps below use the poetry-dotenv-plugin because its available on PyPi and the steps will work for anyone, but I have confirmed this also occurs with simple hello-world plugins created by following the documentation.

1. Install latest poetry:

   curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/install-poetry.py > install-poetry.py
   python install-poetry --preview
   

   Output:

   Retrieving Poetry metadata                                                                                                                                                                                         
                                                                                                                                                                                                                  
   # Welcome to Poetry!                                                                                                                                                                                               
                                                                                                                                                                                                                      
   This will download and install the latest version of Poetry,                                                                                                                                                       
   a dependency and package manager for Python.                                                                                                                                                                       
                                                                                                                                                                                                                  
   It will add the `poetry` command to Poetry's bin directory, located at:                                                                                                                                            
                                                                                                                                                                                                                      
   $POETRY_HOME/bin                                                                                                                                                                                             
                                                                                                                                                                                                                      
   You can uninstall at any time by executing this script with the --uninstall option,                                                                                                                                
   and these changes will be reverted.                                                                                                                                                                                
                                                                                                                                                                                                                      
   Installing Poetry (1.2.0a2): Done                                                                                                                                                                                  
                                                                                                                                                                                                                      
   Poetry (1.2.0a2) is installed now. Great!                                                                                                                                                                          
                                                                                                                                                                                                                      
   You can test that everything is set up by executing:                                                                                                                                                               
                                                                                                                                                                                                                      
   `poetry --version`
   

2. Install a plugin:

   poetry plugin add poetry-dotenv-plugin
   

   Output:

   Using version ^0.1.0-alpha.2 for poetry-dotenv-plugin                                                                                                                                                              
   Updating dependencies                                                                                                                                                                                              
   Resolving dependencies... (3.4s)                                                                                                                                                                                   
                                                                                                                                                                                                                      
   Writing lock file                                                                                                                                                                                                  
                                                                                                                                                                                                                      
   Package operations: 2 installs, 1 update, 0 removals                                                                                                                                                               
                                                                                                                                                                                                                      
     • Installing python-dotenv (0.19.0)                                                                                                                                                                              
     • Updating keyring (23.0.1 -> 22.3.0)                                                                                                                                                                            
     • Installing poetry-dotenv-plugin (0.1.0a2)
   

3. Check the plugin is installed:

   poetry plugin show
   

   Output:

     • poetry-dotenv-plugin (0.1.0a2) A Poetry plugin to automatically load environment variables from .env files                                                                                                     
         1 application plugin                                                                                                                                                                                         
                                                                                                                                                                                                                      
         Dependencies                                                                                                                                                                                                 
           - poetry (>=1.2.0a1)                                                                                                                                                                                       
           - python-dotenv (>=0.10.0)
   

4. Remove the plugin:

   poetry plugin remove poetry-dotenv-plugin
   

   Output (note that poetry-core and cleo are removed):

   Updating dependencies
   Resolving dependencies... (0.1s)
   
   Writing lock file
   
   Package operations: 0 installs, 0 updates, 39 removals
   
     • Removing appdirs (1.4.4)
     • Removing cachecontrol (0.12.6)
     • Removing cachy (0.3.0)
     • Removing certifi (2021.5.30)
     • Removing cffi (1.14.6)
     • Removing charset-normalizer (2.0.4)
     • Removing cleo (1.0.0a4)
     • Removing crashtest (0.3.1)
     • Removing cryptography (3.4.7)
     • Removing distlib (0.3.2)
     • Removing entrypoints (0.3)
     • Removing filelock (3.0.12)
     • Removing html5lib (1.1)
     • Removing idna (3.2)
     • Removing importlib-metadata (1.7.0)
     • Removing jeepney (0.7.1)
     • Removing keyring (22.3.0)
     • Removing lockfile (0.12.2)
     • Removing msgpack (1.0.2)
     • Removing packaging (20.9)
     • Removing pexpect (4.8.0)
     • Removing pkginfo (1.7.1)
     • Removing poetry-core (1.1.0a6)
     • Removing poetry-dotenv-plugin (0.1.0a2)
     • Removing ptyprocess (0.7.0)
     • Removing pycparser (2.20)
     • Removing pylev (1.4.0)
     • Removing pyparsing (2.4.7)
     • Removing python-dotenv (0.19.0)
     • Removing requests (2.26.0)
     • Removing requests-toolbelt (0.9.1)
     • Removing secretstorage (3.3.1)
     • Removing shellingham (1.4.0)
     • Removing six (1.16.0)
     • Removing tomlkit (0.7.2)
     • Removing urllib3 (1.26.6)
     • Removing virtualenv (20.4.4)
     • Removing webencodings (0.5.1): Removing...
     • Removing zipp (3.5.0): Removing...
   

5. Confirm that poetry install is broken:

   poetry --version    
   

   Output:

   Traceback (most recent call last):
     File "/home/jack/.poetry/bin/poetry", line 5, in <module>
       from poetry.console.application import main
     File "/home/jack/.poetry/venv/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'
   

[mkniewallner]

Thanks for testing @lafrenierejm, appreciate it.

Tested too on 1.2.0b2 and the removal of the plugin left poetry’s own dependencies untouched, so closing this issue.

[lafrenierejm]

Everything looks good when running this from c1475a0b6dd6f4a3e99112cc36b8c0d1024e4048, the current HEAD of master.

1. Install plugin:

lafrenierejm@macbook-air poetry % poetry run poetry self add poetry-dotenv-plugin
<snip>
Using version ^0.1.0a2 for poetry-dotenv-plugin

Updating dependencies
Resolving dependencies... (0.1s)

Writing lock file

Package operations: 2 installs, 0 updates, 0 removals

  • Installing python-dotenv (0.20.0)
  • Installing poetry-dotenv-plugin (0.1.0a2)

1. Show installed plugins:

lafrenierejm@macbook-air poetry % poetry run poetry self show plugins
<snip>
  • poetry-dotenv-plugin (0.1.0a2) A Poetry plugin to automatically load environment variables from .env files
      1 application plugin

      Dependencies
        - poetry (>=1.2.0a1)
        - python-dotenv (>=0.10.0)

  • poetry-plugin-export (1.0.4) Poetry plugin to export the dependencies to various formats
      1 application plugin

      Dependencies
        - poetry (>=1.2.0b1dev0,<2.0.0)

1. Remove installed plugin:

lafrenierejm@macbook-air poetry % poetry run poetry self remove poetry-dotenv-plugin
<snip>
Updating dependencies
Resolving dependencies... (0.1s)

Writing lock file

Package operations: 0 installs, 0 updates, 2 removals

  • Removing poetry-dotenv-plugin (0.1.0a2)
  • Removing python-dotenv (0.20.0)

1. Print version to confirm poetry is still installed:

lafrenierejm@macbook-air poetry % poetry run poetry version                                                                                                        
<snip>
poetry 1.2.0b3.dev0