pip installation fails on Windows because of non-existing HOME

[jgieseler]

On Windows, the pip installation fails because Windows doesn't have a HOME environment variable (at least not always); it uses USERPROFILE instead (as far as I understand):

(base) PS C:\Users\user> pip install PyThea==0.7.1
Collecting PyThea==0.7.1
  Using cached PyThea-0.7.1.tar.gz (48 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [19 lines of output]
      Traceback (most recent call last):
        File "C:\Users\user\miniconda3\envs\base\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", line 363, in <module>
          main()
        File "C:\Users\user\miniconda3\envs\base\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", line 345, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "C:\Users\user\miniconda3\envs\base\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", line 130, in get_requires_for_build_wheel
          return hook(config_settings)
        File "C:\Users\user\AppData\Local\Temp\pip-build-env-pfvfasnq\overlay\Lib\site-packages\setuptools\build_meta.py", line 338, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=['wheel'])
        File "C:\Users\user\AppData\Local\Temp\pip-build-env-pfvfasnq\overlay\Lib\site-packages\setuptools\build_meta.py", line 320, in _get_build_requires
          self.run_setup()
        File "C:\Users\user\AppData\Local\Temp\pip-build-env-pfvfasnq\overlay\Lib\site-packages\setuptools\build_meta.py", line 484, in run_setup
          super(_BuildMetaLegacyBackend,
        File "C:\Users\user\AppData\Local\Temp\pip-build-env-pfvfasnq\overlay\Lib\site-packages\setuptools\build_meta.py", line 335, in run_setup
          exec(code, locals())
        File "<string>", line 10, in <module>
        File "C:\Users\user\miniconda3\envs\base\lib\os.py", line 679, in __getitem__
          raise KeyError(key) from None
      KeyError: 'HOME'
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

This can be fixed, for example, by replacing os.environ['HOME'] with Path.home() (requires from pathlib import Path).