Problems with pdm 1.5.1 when installed/upgraded via pipx

• I have searched the issue tracker and believe that this is not a duplicate.

Steps to reproduce

I was happily using pdm in various versions before 1.5.0 (even 1.5.0b’s) which I installed/upgraded using pipx. When I do an pipx upgrade-all which brings pdm to 1.5.1, I get an error message when tryping to install any package:

Error occurs
Traceback (most recent call last):
  File "c:\users\z001y9xs\.local\pipx\venvs\pdm\lib\site-packages\pdm\termui.py", line 189, in logging
    yield logger
  File "c:\users\z001y9xs\.local\pipx\venvs\pdm\lib\site-packages\pdm\installers\synchronizers.py", line 301, in synchronize
    with self.ui.logging("install"), self.environment.activate():
  File "c:\python37\lib\contextlib.py", line 112, in __enter__
    return next(self.gen)
  File "c:\users\z001y9xs\.local\pipx\venvs\pdm\lib\site-packages\pdm\models\environment.py", line 131, in activate
    bin_py = req_uninstall.bin_py
AttributeError: module 'pip._internal.req.req_uninstall' has no attribute 'bin_py'

A pipx reinstall did not help. The only mitigation was to remove pdm and install it without pipx.

Environment Information

I had the same issue on both Windows and Python using both Python 3.7 and 3.8.

[frostming]

See #412 , the workaround is to downgrade the pip to <21.1 inside the pipx managed venv.

The release with a fix will be out this week.

[linw1995]

Or you can install the HEAD of the master branch version to acquire this fix by executing these commands.

pipx uninstall pdm
pipx install "git+https://github.com/pdm-project/pdm.git@master#egg=pdm"