utils.env._full_python_path output encoding on Windows

[Winand]

• Poetry version: 1.3.1
• Python version: 3.9.13
• OS version and name: Windows 11 22H2
• pyproject.toml: gist

• I am on the latest stable Poetry version, installed using a recommended method.
• I have searched the issues of this repo and believe that this is not a duplicate.
• I have consulted the FAQ and blog for any relevant entries or release notes.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option) and have included the output below.

Issue

I want to use poetry along with pyenv-win.
When I set prefer-active-python = true and call poetry install I get "Command cannot be found" error:

PS F:\python\projects\tutorial-hypermodern-python-winand> poetry install
El sistema no puede encontrar la ruta especificada.

Command 'C:\Users\Àíäðåé\.pyenv\pyenv-win\versions\3.8.10\python.exe -c "import sys; print('.'.join([str(s) for s in sys.version_info[:3]]))"' returned non-zero exit status 1.

Username in the output has broken encoding (Àíäðåé instead of Андрей). I've found out that poetry tries to get current interpreter using utils.env._full_python_path function which returns broken path in my case.

I've found two possible solutions:

• Add universal_newlines=True / text=True to subprocess.check_output call. That fixes only paths which can be encoded with local encoding - cp1251.
• Encode output to UTF-8 in child process:

subprocess.check_output(
    list_to_shell_command(
        # [python, "-c", '"import sys; print(sys.executable)"']
        [python, "-c", '"import sys; sys.stdout.buffer.write(sys.executable.encode())"']
    ),
    shell=True,
).strip()

[Winand]

Path encoding is also a problem for poetry install.
poetry thinks that pyenv's 3.9.13 base environment is a virtual environment and installs everything there. (actually 3.8.10 is selected in pyenv)

PS F:\python\projects\tutorial-hypermodern-python-winand> poetry env info

Virtualenv
Python:         3.9.13
Implementation: CPython
Path:           C:\Users\Андрей\.pyenv\pyenv-win\versions\3.9.13
Executable:     C:\Users\Андрей\.pyenv\pyenv-win\versions\3.9.13\python.exe
Valid:          True

System
Platform:   win32
OS:         nt
Python:     3.8.10
Path:       C:\Users\Àíäðåé\.pyenv\pyenv-win\versions\3.9.13
Executable: python

If I patch utils.env.GET_BASE_PREFIX:

GET_BASE_PREFIX = """\
import sys

if hasattr(sys, "real_prefix"):
    sys.stdout.buffer.write(sys.real_prefix.encode())
elif hasattr(sys, "base_prefix"):
    sys.stdout.buffer.write(sys.base_prefix.encode())
else:
    sys.stdout.buffer.write(sys.prefix.encode())
"""

poetry env info still does not show 3.8.10 but poetry install creates a new virtual environment in .venv folder as expected (prefer-active-python, in-project are set)

PS F:\python\projects\tutorial-hypermodern-python-winand> poetry env info   

Virtualenv
Python:         3.9.13
Implementation: CPython
Path:           NA
Executable:     NA

System
Platform:   win32
OS:         nt
Python:     3.9.13
Path:       C:\Users\Андрей\.pyenv\pyenv-win\versions\3.9.13
Executable: C:\Users\Андрей\.pyenv\pyenv-win\versions\3.9.13\python.exe

[github-actions]

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