Update dependency uv to v0.12.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
uv	tools	patch	0.12.1 → 0.12.4

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Release Notes

astral-sh/uv (uv)

v0.12.4

Compare Source

Released on 2026-08-13.

Enhancements

• Prefer post-quantum key exchange and enable opt-in TLS diagnostics (#​21054)
• Accept whitespace before versions in noncompliant wildcard comparisons such as Requires-Python: >= 3.5.* (#​21012)
• Report a specific error when a PEP 723 closing tag contains trailing whitespace or other content (#​20944)
• Omit source-span carets from diagnostics for empty PEP 508 requirements (#​21094)

Preview features

• Add uv check --no-install-project and respect UV_NO_INSTALL_PROJECT to install dependencies without building or installing the project (#​21085)
• Make the ty subprocess invoked by uv check honor uv's color and progress settings, including quiet mode (#​21086)

Performance

• Speed up resolutions with long runs of unavailable package versions by coalescing gaps in the resolver's version ranges (#​20804)
• Speed up Simple API parsing by deserializing PyPI and Pyx file metadata directly (#​21041)

Bug fixes

• Use windowed pythonw.exe launchers for virtual environments created from managed Python minor-version links (#​19235)
• Allow uv lock to proceed when .venv is an unusable project environment (#​21068)
• Respect fork-strategy when ordering forks created from environments or existing lockfile resolution-markers (#​21000)
• Preserve consecutive wildcard Python minor-version exclusions such as !=3.11.*, !=3.12.* in uv.lock (#​21045)
• Preserve inline comments on the final item in dependency arrays when uv add updates it (#​21008)
• Recover from stale base-interpreter cache metadata when an existing virtual environment exposes a version mismatch (#​21073)
• Prevent interpreter cache reuse across different PYTHONEXECUTABLE and __PYVENV_LAUNCHER__ overrides (#​21075)
• Show standard styling, usage guidance, and line termination for invalid uv version --bump values (#​21076)

v0.12.3

Compare Source

Released on 2026-08-07.

Python

• Add CPython 3.13.15 (#​20997)

Preview features

• Add --output-format to select automatic, human-readable, or raw-byte output for uv cache size (#​20992)
• Preserve JSON output from uv workspace metadata --quiet while suppressing diagnostics (#​20991)
• Reduce memory usage for large workspaces by streaming uv workspace metadata JSON output (#​20990)

Performance

• Reduce Linux startup latency by initializing the workspace cache before spawning another thread (#​20989)
• Reuse compiled workspace exclusion patterns during workspace discovery (#​20988)
• Speed up conflict-heavy resolutions by avoiding materialized range complements (#​20982)
• Avoid slow procfs reads during Python interpreter discovery on Linux (#​20987)

Documentation

• Add PEP 740 attestations to the GitHub Actions publishing example (#​20986)
• Restrict the GitHub Actions publishing example to Python version tags (#​20973)
• Correct --python-pin to --pin-python in the uv init --bare example (#​20876)

v0.12.2

Compare Source

Released on 2026-08-05.

Python

• Add CPython 3.15.0rc1 (#​20948)
• Add CPython 3.14.7 (#​20971)

Enhancements

• Ensure diagnostic hints end with a newline to prevent malformed terminal output (#​20959)

Preview features

• Audit one or all installed tools with uv tool audit (#​20921)
• Report physically reclaimed disk space during cache cleanup with the cache-physical-space preview feature (#​20925)

Configuration

• Add UV_RUN_RLIMIT_NOFILE to set the open-file limit for commands launched by uv run (#​20926)

Performance

• Speed up uv.lock parsing for wheel entries (#​20881)
• Speed up uv.lock parsing for source distribution entries (#​20882)
• Speed up filename extraction from distribution URLs (#​20879)
• Reduce filesystem metadata lookups during bytecode compilation (#​20928)
• Reuse file metadata when building source distributions (#​20927)

Bug fixes

• Preserve compatibility with older uv versions when recording artifact sizes in cached wheels and source distributions (#​20963)
• Avoid including workspace-root default dependency groups when syncing or exporting a selected workspace member unless explicitly requested (#​20930)

Documentation

• Separate build and publish jobs in the GitHub Actions publishing guide (#​20946)
• Ensure the GitHub Actions publishing example waits for the build job to finish (#​20957)
• Correct typos in the Docker integration guide (#​20970)

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