Poetry on Windows 10 + pyenv-win is quickly corrupted

• I am on the latest Poetry version (reason below).
• 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: Windows 10 (10.0.18362 Build 18362), German locale
• Poetry version: 1.1.0b2
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/kiudee/96f414e3564023b5576137ddf761675c

Issue

I spent several days trying to install poetry on my Windows workstation (after already using it for months on my Linux PCs). After trying the following methods (which failed):

• Global python installation + PowerShell command
• pyenv-win + PowerShell command
• pyenv-win + pipx + poetry==1.0.10

I got poetry to work using:

1. Uninstalling global python and removing entries from PATH
2. Installing pyenv-win 2.64.1
3. Installing python using pyenv install 3.8.2 and pyenv global 3.8.2
4. Installing pipx using pip install pipx
5. Correctly adding all directories to PATH
6. Installing poetry using pipx install poetry==1.1.0b2 (beta was required to get poetry to run - got the tip from another issue)

Running poetry install on a project worked once, but broke when trying again on another project. So what already fails then is the following:

1. Create a new project using poetry new blablub
2. poetry add tqdm (or insert any other package here) fails with

  Command C:\Users\Karlson\AppData\Local\pypoetry\Cache\virtualenvs\blablub-HgamxXlr-py3.8\Scripts\pip.exe install --no-deps file://C:\Users\Karlson\AppData\Local\pypoetry\Cache\artifacts\be\98\c7\69fe6fea7a59659af1c6260899226129565330b1e07c9c5b3769be76bf\six-1.15.0-py2.py3-none-any.whl errored with the following return code 1, and output:
  Processing c:\users\karlson\appdata\local\pypoetry\cache\artifacts\be\98\c7\69fe6fea7a59659af1c6260899226129565330b1e07c9c5b3769be76bf\six-1.15.0-py2.py3-none-any.whl
      ERROR: Command errored out with exit status 1:
       command: 'C:\Users\Karlson\AppData\Local\pypoetry\Cache\virtualenvs\blablub-HgamxXlr-py3.8\Scripts\python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\Karlson\\AppData\\Local\\Temp\\pip-req-build-mm0i0yyu\\setup.py'"'"'; __file__='"'"'C:\\Users\\Karlson\\AppData\\Local\\Temp\\pip-req-build-mm0i0yyu\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:\Users\Karlson\AppData\Local\Temp\pip-pip-egg-info-sly7kipr'
           cwd: C:\Users\Karlson\AppData\Local\Temp\pip-req-build-mm0i0yyu\
      Complete output (5 lines):
      Traceback (most recent call last):
        File "<string>", line 1, in <module>
        File "c:\users\karlson\.pyenv\pyenv-win\versions\3.8.2\lib\tokenize.py", line 392, in open
          buffer = _builtin_open(filename, 'rb')
      FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\Karlson\\AppData\\Local\\Temp\\pip-req-build-mm0i0yyu\\setup.py'
      ----------------------------------------
  ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

Gist with the full debug output: https://gist.github.com/kiudee/70df85a30c7caed4156fc490d2569d02

Installing the same package in the pyenv environment using pip install six works perfectly fine.

Let me know if you need more information to debug the problem.

[JayDoubleu]

This is pretty annoying. I just deleted cache directory at least 20 times today during development. I would appreciate if this could be prioritized

[gwdekker]

I have a very similar experience when trying to let poetry work with multiple python versions on Windows. In my experience, pyenv-win and poetry do not play nicely so I dropped that option - instead, having several pythons installed in Windows through the standard python.org Windows installers, added only one to PATH. Now I experience the following:

• Poetry 1.0.10 seems to work fine as long as you use the same python version poetry was installed with
• Poetry 1.0.10 crashes when trying poetry env use, as covered in issue #2698. This issue suggests using 1.1.0b2 instead.
• Poetry 1.1.0b2 shows exactly the same instable behavior for me as experenced by OP.
• Poetry 1.0.9 does not crash when using poetry env use