Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Error when %TEMP% is a junction to a dir on a letter-less drive

See original GitHub issue

Description

Error when %TEMP% is a junction to a dir on a letter-less drive.

The error looks similar to jazzband/pip-tools#1061, but in pip itself.

Expected behavior

Successful install/reinstall

pip version

21.3

Python version

3.10.0, 3.9.6, 3.8.2

OS

Windows 10 x64

How to Reproduce

Create a volume and don’t assign a letter to it
Create dir on this volume
Create a junction on this dir: ln--junction junction ‪\\?\Volume{<new volume uuid>}\dir
set TEMP=%cd%\junction
Install some package: pip3 install CrossMap

Output

Traceback (most recent call last):
  File "<python_install_dir>\lib\site-packages\pip\_internal\cli\base_command.py", line 164, in exc_logging_wrapper
    status = run_func(*args)
  File "<python_install_dir>\lib\site-packages\pip\_internal\cli\req_command.py", line 204, in wrapper
    return func(self, options, args)
  File "<python_install_dir>\lib\site-packages\pip\_internal\commands\install.py", line 294, in run
    wheel_cache = WheelCache(options.cache_dir, options.format_control)
  File "<python_install_dir>\lib\site-packages\pip\_internal\cache.py", line 219, in __init__
    self._ephem_cache = EphemWheelCache(format_control)
  File "<python_install_dir>\lib\site-packages\pip\_internal\cache.py", line 196, in __init__
    super().__init__(self._temp_dir.path, format_control)
  File "<python_install_dir>\lib\site-packages\pip\_internal\cache.py", line 121, in __init__
    super().__init__(cache_dir, format_control, {"binary"})
  File "<python_install_dir>\lib\site-packages\pip\_internal\cache.py", line 44, in __init__
    assert not cache_dir or os.path.isabs(cache_dir)
AssertionError

Code of Conduct

I agree to follow the PSF Code of Conduct.

Issue Analytics

State:
Created 2 years ago
Comments:6 (3 by maintainers)

Top GitHub Comments

1reaction

grv87commented, Oct 24, 2021

os.path.realpath returns Volume{uuid}\\dir\\pip-kind-.... Yes, the prefix is lost.

I’ve reported https://bugs.python.org/issue45597.

1reaction

pfmoorecommented, Oct 21, 2021

Following the chain of calls leads to os.path.realpath(tempfile.mkdtemp(prefix=f"pip-{kind}-")). Can you confirm what that call returns in your environment? (Clearly you can just use any old prefix for the call).

If it doesn’t return a valid path, that would imply a Python bug (which we might be able to work around, but I’d also like to make sure the root issue is reported if that’s what it is).

Top Results From Across the Web

Low Disk Space error due to a full Temp folder

To clear the Microsoft Store cache, press the Windows Logo Key + R to open the Run dialog box, then type wsreset.exe and...

What is a safe way to move AppData\Local to a different drive?

Open the %LocalAppData% Properties dialog; Location tab → Enter desired new location; Move.

The Ultimate Guide to Robocopy - Adam the Automator

Learn all of the robocopy commands that you can use in data migration, syncing folders, and copying even large files.

Using Backup4all - FAQ 8

Troubleshooting the Volume Shadow Copy error messages; Not enough free disk space in temp folder; Backup .OST files. How to schedule a backup...

Link Shell Extension (LSE)

Hardlinks, Junctions and Symbolic Links are NOT supported on FAT file systems, ... To create the Hardlinks a destination folder must be chosen, ......