Interrupting conda-pypi seems to break it forever

[ryanskeith]

Description

It seems if the processes is interrupted during the install, that the user gets to an unrecoverable state if the user attempts the installation again:

conda pypi install steam
Inspecting pypi and conda dependencies
PYPI index channels:
 - https://pypi.org/simple/
Conda channels:
 - file:///Users/rkeith/Library/Application%20Support/conda-pypi
 - main
 - r
 - defaults
Converting required pypi packages: \ failed

CondaError: KeyboardInterrupt

(base)  ✘ rkeith@MacBookPro  ~/code/conda-pypi   main  conda pypi install steam
Inspecting pypi and conda dependencies
PYPI index channels:
 - https://pypi.org/simple/
Conda channels:
 - file:///Users/rkeith/Library/Application%20Support/conda-pypi
 - main
 - r
 - defaults
Converting required pypi packages: done

# >>>>>>>>>>>>>>>>>>>>>> ERROR REPORT <<<<<<<<<<<<<<<<<<<<<<

    Traceback (most recent call last):
      File "/Users/rkeith/altmc/lib/python3.12/site-packages/conda/exception_handler.py", line 28, in __call__
        return func(*args, **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^
      File "/Users/rkeith/altmc/lib/python3.12/site-packages/conda/cli/main.py", line 61, in main_subshell
        exit_code = do_call(args, parser)
                    ^^^^^^^^^^^^^^^^^^^^^
      File "/Users/rkeith/altmc/lib/python3.12/site-packages/conda/cli/conda_argparse.py", line 181, in do_call
        result = plugin_subcommand.action(getattr(args, "_args", args))
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/Users/rkeith/code/conda-pypi/conda_pypi/cli/main.py", line 70, in execute
        return execute_install(args)
               ^^^^^^^^^^^^^^^^^^^^^
      File "/Users/rkeith/code/conda-pypi/conda_pypi/cli/install.py", line 99, in execute
        packages_to_install = changes[1]
                              ~~~~~~~^^^
    TypeError: 'NoneType' object is not subscriptable

`$ /Users/rkeith/altmc/bin/conda pypi install steam`

  environment variables:
                 CIO_TEST=<not set>
CONDA_ADD_PIP_AS_PYTHON_DEPENDENCY=0
    CONDA_ALLOW_SOFTLINKS=false
        CONDA_DEFAULT_ENV=base
                CONDA_EXE=/Users/rkeith/altmc/bin/conda
             CONDA_PREFIX=/Users/rkeith/altmc
           CONDA_PREFIX_1=/Users/rkeith/altmc
           CONDA_PREFIX_2=/Users/rkeith/altmc/envs/conda-build
    CONDA_PROMPT_MODIFIER=(base)
         CONDA_PYTHON_EXE=/Users/rkeith/altmc/bin/python
               CONDA_ROOT=/Users/rkeith/altmc
              CONDA_SHLVL=3
           CURL_CA_BUNDLE=<not set>
                 INFOPATH=/opt/homebrew/share/info:
               LD_PRELOAD=<not set>
                     PATH=/Users/rkeith/altmc/bin:/Users/rkeith/miniconda3/condabin:/opt/homebre
                          w/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:
                          /usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/cod
                          ex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd
                          /codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/c
                          odex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/Us
                          ers/rkeith/.local/bin:/Applications/iTerm.app/Contents/Resources/utili
                          ties
       REQUESTS_CA_BUNDLE=<not set>
            SSL_CERT_FILE=<not set>

     active environment : base
    active env location : /Users/rkeith/altmc
            shell level : 3
       user config file : /Users/rkeith/.condarc
 populated config files : /Users/rkeith/altmc/.condarc
                          /Users/rkeith/.condarc
          conda version : 25.9.0
    conda-build version : 25.9.0
         python version : 3.12.11.final.0
                 solver : libmamba (default)
       virtual packages : __archspec=1=m1
                          __conda=25.9.0=0
                          __osx=15.6.1=0
                          __unix=0=0
       base environment : /Users/rkeith/altmc  (writable)
      conda av data dir : /Users/rkeith/altmc/etc/conda
  conda av metadata url : None
           channel URLs : https://conda.anaconda.org/main/osx-arm64
                          https://conda.anaconda.org/main/noarch
                          https://conda.anaconda.org/r/osx-arm64
                          https://conda.anaconda.org/r/noarch
                          https://repo.anaconda.com/pkgs/main/osx-arm64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/osx-arm64
                          https://repo.anaconda.com/pkgs/r/noarch
          package cache : /Users/rkeith/altmc/pkgs
                          /Users/rkeith/.conda/pkgs
       envs directories : /Users/rkeith/altmc/envs
                          /Users/rkeith/.conda/envs
               platform : osx-arm64
             user-agent : conda/25.9.0 requests/2.32.4 CPython/3.12.11 Darwin/24.6.0 OSX/15.6.1 solver/libmamba conda-libmamba-solver/25.4.0 libmambapy/2.0.5
                UID:GID : 502:20
             netrc file : None
           offline mode : False


An unexpected error has occurred. Conda has prepared the above report.
If you suspect this error is being caused by a malfunctioning plugin,
consider using the --no-plugins option to turn off plugins.

Example: conda --no-plugins install <package>

Alternatively, you can set the CONDA_NO_PLUGINS environment variable on
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Example: CONDA_NO_PLUGINS=true conda install <package>

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    $ conda config --set report_errors false

[ryanskeith]

Removing the working folder doesn't seem to fix it. Neither does conda clean.

[danyeaw]

I did happen to add a robustness check in #103 at https://github.com/conda-incubator/conda-pypi/pull/145/files#diff-720f890bbbbe3f2873d1aa85c3fc07e3cd560ba2c696fbda570e6bc7b177f21cR135-R138. It looks to see if changes are None prior to getting the change. I wonder if this would help with this issue as well.