`uv tool upgrade` says "Nothing to upgrade" when index auth is invalid

[shenanigansd]

Summary

Invalid auth for private indexes cause uv tool upgrade to fail with a misleading "Nothing to upgrade" message, even when a new version is available.

Steps to reproduce:

Authenticate to the private index:

PS C:\Users\BradleyReynolds> $env:CLOUDSMITH_TOKEN="plz-dont-tell-anyone-about-me"

Install the package:

PS C:\Users\BradleyReynolds> uv tool install idi-xio==0.9.0 --index-url "https://dl.cloudsmith.io/$env:CLOUDSMITH_TOKEN/impressdesigns/impressdesigns/python/simple/" --extra-index-url "https://pypi.org/simple"
Resolved 25 packages in 1.46s
Prepared 1 package in 59ms
Installed 25 packages in 1.99s
 + annotated-doc==0.0.4
 + annotated-types==0.7.0
 + click==8.3.1
 + colorama==0.4.6
 + idi-xio==0.9.0
 + linkify-it-py==2.0.3
 + markdown-it-py==4.0.0
 + mdit-py-plugins==0.5.0
 + mdurl==0.1.2
 + platformdirs==4.9.2
 + pydantic==2.12.5
 + pydantic-core==2.41.5
 + pydantic-settings==2.13.1
 + pygments==2.19.2
 + python-dotenv==1.2.1
 + rich==14.3.3
 + shellingham==1.5.4
 + textual==8.0.0
 + typer==0.24.0
 + typing-extensions==4.15.0
 + typing-inspection==0.4.2
 + uc-micro-py==1.0.3
 + xio-cli==0.10.0
 + xio-core==0.10.0
 + xio-tui==0.10.0
Installed 1 executable: xio

Artifically break authentication:

PS C:\Users\BradleyReynolds> Remove-Item Env:CLOUDSMITH_TOKEN

Release the constraint from installing an older version to make this MRE:

PS C:\Users\BradleyReynolds> uv tool install idi-xio@latest --index-url "https://dl.cloudsmith.io/$env:CLOUDSMITH_TOKEN/impressdesigns/impressdesigns/python/simple/" --extra-index-url "https://pypi.org/simple"

Resolved 25 packages in 303ms
Audited 25 packages in 8ms
Installed 1 executable: xio
PS C:\Users\BradleyReynolds> uv tool list
idi-xio v0.9.0
- xio

Now attempting to update gives a misleading "Nothing to upgrade" message, even though v0.10.0 is available:

PS C:\Users\BradleyReynolds> uv tool upgrade idi-xio --index-url "https://dl.cloudsmith.io/$env:CLOUDSMITH_TOKEN/impressdesigns/impressdesigns/python/simple/" --extra-index-url "https://pypi.org/simple"
Nothing to upgrade

See, if I put the auth back, suddenly, there are things to upgrade:

PS C:\Users\BradleyReynolds> $env:CLOUDSMITH_TOKEN="plz-dont-tell-anyone-about-me"
PS C:\Users\BradleyReynolds> uv tool upgrade idi-xio --index-url "https://dl.cloudsmith.io/$env:CLOUDSMITH_TOKEN/impressdesigns/impressdesigns/python/simple/" --extra-index-url "https://pypi.org/simple"
Updated idi-xio v0.9.0 -> v0.10.0
 - idi-xio==0.9.0
 + idi-xio==0.10.0
Installed 1 executable: xio

Platform

Windows 11 Enterprise 10.0.28000.4

Version

uv 0.10.3

Python version

Python 3.14.3