astral-sh/uv

Add `--all-variants` option to show debug builds in `uv python list`

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#15983 opened on Sep 22, 2025

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buggood first issue

Description

Summary

Truncated result is

$ uv python list --only-downloads
cpython-3.14.0rc3-linux-x86_64-gnu                       <download available>
cpython-3.14.0rc3+freethreaded-linux-x86_64-gnu          <download available>
cpython-3.14.0rc3+freethreaded+debug-linux-x86_64-gnu    <download available>
cpython-3.13.7-linux-x86_64-gnu                          <download available>
cpython-3.13.7+freethreaded-linux-x86_64-gnu             <download available>
cpython-3.13.7+freethreaded+debug-linux-x86_64-gnu       <download available>
... more cpython versions below

But these versions can actually be installed

$ uv python install 3.13+debug
cpython-3.13.7+debug-linux-x86_64-gnu (download) ...

Platform

Linux 6.15.3-100.fc41.x86_64 x86_64 GNU/Linux (Fedora)

Version

uv 0.8.19

Python version

3.12.3

Contributor guide

Tech stack
rustpython
Domain
clideveloper experiencetooling
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Rust programmingCLI design
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
To implement this feature, first locate the `uv python list` subcommand in the CLI code (likely in `crates/uv cli/src/lib.rs` or similar). Understand how the ` only downloads` flag filters output and why debug builds are excluded. Then add a new ` all variants` boolean flag. Modify the filtering logic to include debug builds when the flag is set. Ensure tests are added for the new option. Check any existing discussions or linked PRs for additional context.