astral-sh/uv

`uv self update` may leave uv unusable if interrupted

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#12,142 opened on Mar 12, 2025

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bughelp wantedwindows

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Description

Description:

The current update process renames uv.exe to uv.exe.previous.exe before completing. If interrupted (e.g., by network failures or manual termination), this can leave uv unusable due to an incomplete update.

Suggested Improvement:

Ensure atomic replacement where uv.exe is only modified after the new version is fully validated.

Contributor guide

Research direction
Implement atomic file replacement by downloading the new version to a temporary file and then using an atomic rename (e.g., `std::fs::rename`) to replace the current executable. Ensure the rename is performed only after the download is verified and complete.
Tech stack
rust
Domain
cli
Issue type
Bug
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.
1-3 hours
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
RustFile system operations
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65