Getting "access is denied" in user folder when running "uv tool install" on Windows 10

[driscollis]

I tried the posting app with uv on my Windows 10 machine. The author of posting recommends running the following command:

uv tool install --python 3.12 posting

When I run that in a regular Windows Terminal or a Windows Terminal with admin privileges, I get the following error:

C:\workspace\> uv tool install --python 3.12 posting
Resolved 35 packages in 5.75s
   Built pyperclip==1.9.0
Prepared 34 packages in 4.25s
error: Failed to install: httpx-0.28.1-py3-none-any.whl (httpx==0.28.1)
  Caused by: Failed to persist temporary file to C:\Users\Mike\AppData\Roaming\uv\tools\posting\Lib\site-packages\..\..\Scripts\httpx.exe: Access is denied. (os error 5)

I tried this on two different Windows 10 machines with the same result. I tried running uv cache clean and re-ran the above command with the same result.

I am using uv 0.5.10 (37b11dd 2024-12-17)

[FishAlchemist]

I seem to have seen this issue before. Can you tell me the output of running the following command on powershell?

Get-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem' -Name 'LongPathsEnabled'

It's just a command to read the registry, so it doesn't require administrator privileges.

[driscollis]

Here's what I get:

LongPathsEnabled : 0
PSPath : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem
PSParentPath : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control
PSChildName : FileSystem
PSDrive : HKLM
PSProvider : Microsoft.PowerShell.Core\Registry

[FishAlchemist]

I'm not sure if this issue is triggered by an overly long path. Perhaps you could try enabling long paths.
https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=powershell#registry-setting-to-enable-long-paths
But if this is truly the issue, I'm not sure if UV has a way to detect it.

Edit:
Even after turning off long paths in my Windows, it still seems to work, so it's probably not the issue.
Perhaps you could also check if the denied-access folder can be accessed normally without granting additional permissions.

[driscollis]

I tried enabling long paths, but I still get the same error.

There are no subfolders in C:\Users\Mike\AppData\Roaming\uv\tools so I am guessing uv is cleaning up when it hits that error. That is unfortunate since I can't inspect that folder to see what the permissions are or if I can access it

[samypr100]

Hmmm, I actually would expect uv to install it in C:\Users\Mike\.local\bin\posting.exe which is where it does on my Windows system based on my home path. Was this working for you previously? Edit: I think in your case it even fails to get there.

Could you capture some trace logs?

$Env:RUST_LOG = 'uv=trace'
uv tool uninstall --python 3.12 posting