Python 3.14, pathname2url does not add //

[ToshibaMastr]

Describe the bug

def path_to_url(path: str) -> str:
    """
    Convert a path to a file: URL.  The path will be made absolute and have
    quoted path parts.
    """
    from urllib.request import pathname2url

    path = os.path.normpath(os.path.abspath(path))
    url = parse.urljoin("file:", pathname2url(path))
    return url

In the path_to_url function, parse.urljoin does not add '//", which causes an error

To reproduce

(socketio-3.14) ➜  socketio pdm update
  0:00:01 🔒 Lock successful.
See /home/mastru/.local/state/pdm/log/pdm-install-cja6lb2y.log for detailed debug log.
[RequirementError]: file:/home/mastru/pg/ProjectNoname/socketio: Expected end or semicolon (after name and no valid version specifier)
    file:/home/mastru/pg/ProjectNoname/socketio

Expected Behavior

package updates

Environment Information

➜  socketio pdm info && pdm info --env
PDM version:
  2.22.1
Python Interpreter:
  /home/mastru/pg/ProjectNoname/socketio/.venv/bin/python (3.14)
Project Root:
  /home/mastru/pg/ProjectNoname/socketio
Local Packages:

{
  "implementation_name": "cpython",
  "implementation_version": "3.14.0a3",
  "os_name": "posix",
  "platform_machine": "x86_64",
  "platform_release": "6.12.4-arch1-1",
  "platform_system": "Linux",
  "platform_version": "#1 SMP PREEMPT_DYNAMIC Mon, 09 Dec 2024 14:31:57 +0000",
  "python_full_version": "3.14.0",
  "platform_python_implementation": "CPython",
  "python_version": "3.14",
  "sys_platform": "linux"
}

Verbose Command Output

No response

Additional Context

This is only on python 3.14, as it is on python 3.13. "//" is added automatically.

# 3.13
>>> parse.urljoin("file://", pathname2url("/home"))
'file:///home'

# 3.14
>>> parse.urljoin("file:", pathname2url("/home"))
'file:/home

Are you willing to submit a PR to fix this bug?

• Yes, I would like to submit a PR.

[monchin]

3.14 is too early, I guess it's better to wait until it releases.