Windows virtual environment does not work correctly under WSL

Bug report

Bug description:

Currently, Windows venvs work under cygwin because the activate script checks for it and converts the path as necessary. Cygwin is old and the new way to run a Linux shell on Windows is through the Windows Subsystem for Linux (WSL). However, there is no check for it in the script, making it not work correctly.

The relevant snippet from the script is:

# on Windows, a path can contain colons and backslashes and has to be converted:
case "$(uname)" in
    CYGWIN*|MSYS*)
        # transform D:\path\to\venv to /d/path/to/venv on MSYS
        # and to /cygdrive/d/path/to/venv on Cygwin
        VIRTUAL_ENV=$(cygpath "__VENV_DIR__")
        export VIRTUAL_ENV
        ;;
    *)
        # use the path as-is
        export VIRTUAL_ENV="__VENV_DIR__"
        ;;
esac

I was able to easily fix it manually by changing the reference to my project's venv path with $(wslpath -u "__VENV_DIR__"). All we need is a check for WSL in the script and another prong on this case statement. The best way to do this is probably by searching for "microsoft" or "wsl" in the output of uname -r. Some work might be needed to ensure this covers all edge cases.

CPython versions tested on:

3.12

Operating systems tested on:

Windows

Linked PRs

• gh-124155

定位包含所示 uname case 语句的 venv 激活脚本，并将其在 WSL 下的行为与现有的 Cygwin 和 MSYS 分支进行比较。检查 wslpath 如何处理 Windows venv 路径，然后验证从 WSL 激活 Windows venv 时是否设置了正确的 VIRTUAL_ENV 值，并且不会导致其他环境出现回归。