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python uv Releases · · 0.12.1

uv 0.12.1: Package-specific pre-release policies, Xonsh support, and performance

sdkinfrapreviewengineer
feature patch

This release of uv introduces package-specific pre-release policies, enabling finer control over handling pre-release versions for individual packages. It also adds support for Xonsh shell activation scripts and includes performance enhancements, such as faster SHA-256 hashing on certain ARM64 platforms. The update is available as a patch for all users, with new preview features and bug fixes.

  • →Add automatic fixes to uv check with --fix
  • →Avoid rejecting unchanged metadata-free lockfiles when workspace dependencies share direct sources
  • →Honor direct URL constraints when validating metadata-free lockfiles
  • →Ignore malformed PEP 723 scripts discovered during project checks
  • →Use ty's native script exclusion in uv check
Features (5) ›
  • Add automatic fixes to uv check with --fix
    #20793
  • Avoid rejecting unchanged metadata-free lockfiles when workspace dependencies share direct sources
    #20847
  • Honor direct URL constraints when validating metadata-free lockfiles
    #20796
  • Ignore malformed PEP 723 scripts discovered during project checks
    #20784
  • Use ty's native script exclusion in uv check
    #20742
Enhancements (6) ›
  • Add package-specific pre-release policies with --prerelease-package
    #20837
  • Support local HTML files as flat indexes
    #20802
  • Add Xonsh virtual environment activation scripts (activate.xsh)
    #19740
  • Preserve filesystem paths passed to uv add --index when updating pyproject.toml
    #20817
  • Parse canonical uv lockfiles directly, with a fallback for other valid TOML syntax
    #20648
  • Accelerate SHA-256 hashing on non-Windows ARM64 platforms
    #20805
Fixes (4) ›
  • Flush shell startup file updates before uv tool update-shell and uv python update-shell exit
    #20842
  • Make workspace-root dependency groups available to commands run from workspace members
    #20840
  • Resolve --find-links paths in requirements files relative to the containing file
    #20832
  • Respect configured indexes in uv tool list --outdated
    #20770
Maintenance (2) ›
  • Document Astral GPU indexes in the PyTorch guide
    #20785
  • Use consistent dependency-group argument descriptions throughout the CLI documentation
    #20823
Read the original announcement →

https://github.com/astral-sh/uv/releases/tag/0.12.1

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