Use caching for `--python-downloads-json-url` by MeitarR · Pull Request #16749 · astral-sh/uv

MeitarR · 2025-11-15T21:11:34Z

Use the CachedClient for --python-downloads-json-url too, with the usual rules around freshness.

MeitarR · 2026-04-13T20:47:49Z

As commented at e4663d0 I decided to bypass cache on uv python list and uv python install as it seems reasonable to me, but I leave the decision up to you whether to change it or always use the cache.

The reason for that is that I'm afraid that the file will change at the remote, and we will fetch the old file from the cache

astral-sh-bot · 2026-05-22T17:28:51Z

uv test inventory changes

This PR changes the tests when compared with the latest main baseline.

Added tests: 1
Removed tests: 0
Changed suites: 1

uv::it: +1 / -0

Added:

uv::it::network::retry_read_timeout_python_downloads_json

Removed: none

konstin · 2026-05-26T19:22:52Z

 }

+/// Fetch Python downloads JSON metadata, using the cache when available.
+async fn read_cached_url(


Why does this use a custom implementation instead of using the existing caching utils? It seems we aren't actually using CachedClient here.

You are right, I did not understand the CachedClient. I rewrote the PR after more research

konstin · 2026-05-26T19:24:15Z

+
+/// Check the python list error message when the server returns HTTP status 500, a retryable error.
+#[tokio::test]
+async fn python_list_remote_python_downloads_json_url_http_500() {


This fetch should use the existing utils and make this test redundant.

Switch the downloads JSON fetch from BaseClient to CachedClient so that uv commands that only need the list for a prerelease warning or a dry-run can hit the cache instead of going to the network every time.

codspeed-hq · 2026-07-04T11:00:18Z

Merging this PR will degrade performance by 5.41%

❌ 1 (👁 1) regressed benchmark
✅ 20 untouched benchmarks

Performance Changes

	Mode	Benchmark	`BASE`	`HEAD`	Efficiency
👁	WallTime	`>=3.8`	140 ns	148 ns	-5.41%

_{Comparing MeitarR:followup-16542 (fc49bc5) with main (9adb63e)}

This avoids caching invalid JSON, and avoid the double deserialization cost from the cache.

We usually don't need this client, so we only construct it if it's requested.

This MR contains the following updates: | Package | Update | Change | |---|---|---| | [uv](https://github.com/astral-sh/uv) | patch | `0.11.21` → `0.11.28` | MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot). **Proposed changes to behavior should be submitted there as MRs.** --- ### Release Notes <details> <summary>astral-sh/uv (uv)</summary> ### [`v0.11.28`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01128) [Compare Source](astral-sh/uv@0.11.27...0.11.28) Released on 2026-07-07. ##### Security This release updates our ZIP library, [astral-async-zip](https://github.com/astral-sh/rs-async-zip), to v0.0.20, which includes 15 changes that harden our ZIP handling against [parser differentials](https://www.brainonfire.net/blog/2022/04/11/what-is-parser-mismatch/). uv may reject ZIP archives with malformed or ambiguous content that were previously accepted. See the [upstream commits](astral-sh/rs-async-zip@v0.0.18...v0.0.20) for a full list of changes. ##### Python - Upgrade GraalPy to 25.1.3 ([#20069](astral-sh/uv#20069)) ##### Enhancements - Improve trace logs for unexpected error chains ([#20220](astral-sh/uv#20220)) - Move lockfile update guidance to a hint ([#20219](astral-sh/uv#20219)) - Preserve indentation for multiline error causes ([#20156](astral-sh/uv#20156)) - Render user errors with their cause chains ([#20217](astral-sh/uv#20217)) - Route final command errors through the printer to respect `-q` and `-qq` ([#20163](astral-sh/uv#20163)) - Use standard rendering for `uv build` errors ([#20159](astral-sh/uv#20159)) - Use standard rendering for tool requirement errors ([#20160](astral-sh/uv#20160)) ##### Performance - Only compile bytecode for installed distributions in `uv pip install` ([#19914](astral-sh/uv#19914)) - Avoid allocating URL-safe Git revisions ([#20194](astral-sh/uv#20194)) - Avoid allocating canonical Python request strings ([#20193](astral-sh/uv#20193)) - Avoid allocating custom Astral mirror URLs ([#20204](astral-sh/uv#20204)) - Avoid allocating expanded compatibility tags ([#20190](astral-sh/uv#20190)) - Avoid allocating shell strings that need no escaping ([#20196](astral-sh/uv#20196)) - Avoid allocating static ABI descriptions ([#20201](astral-sh/uv#20201)) - Avoid allocating static Windows executable names ([#20200](astral-sh/uv#20200)) - Avoid allocating static dependency table names ([#20199](astral-sh/uv#20199)) - Avoid allocating static platform triple components ([#20195](astral-sh/uv#20195)) - Avoid allocating static resolver report labels ([#20198](astral-sh/uv#20198)) - Avoid allocating static unavailable-version messages ([#20197](astral-sh/uv#20197)) - Avoid allocating unchanged Python download architectures ([#20202](astral-sh/uv#20202)) - Avoid allocating unchanged paths during case normalization ([#20203](astral-sh/uv#20203)) - Avoid allocations when expanding group conflicts ([#20211](astral-sh/uv#20211)) - Avoid allocations when formatting requirements ([#20206](astral-sh/uv#20206)) - Avoid cloning credential lookup services ([#20210](astral-sh/uv#20210)) - Avoid cloning dry-run distributions ([#20209](astral-sh/uv#20209)) - Avoid cloning owned dependency metadata ([#20212](astral-sh/uv#20212)) - Avoid redundant direct URL clones ([#20207](astral-sh/uv#20207)) - Create metadata version errors lazily ([#20205](astral-sh/uv#20205)) - Optimize expanded tag compatibility checks ([#20171](astral-sh/uv#20171)) - Optimize parsing of single-digit three-part versions ([#20118](astral-sh/uv#20118)) ##### Bug fixes - Avoid overflow when computing HTTP cache age ([#20178](astral-sh/uv#20178)) - Respect `--upgrade` when `upgrade-package` is configured ([#19955](astral-sh/uv#19955)) - Support `uv tree` in dependency-group-only projects ([#20167](astral-sh/uv#20167)) - Treat cache entries as stale at exact expiration ([#20183](astral-sh/uv#20183)) ### [`v0.11.27`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01127) [Compare Source](astral-sh/uv@0.11.26...0.11.27) Released on 2026-07-06. ##### Enhancements - Continue on ignored errors when fetching wheel metadata ([#12255](astral-sh/uv#12255)) - Use caching for `--python-downloads-json-url` ([#16749](astral-sh/uv#16749)) ##### Preview features - Discover extensionless shebang scripts in `uv workspace list --scripts` ([#20099](astral-sh/uv#20099)) ##### Performance - Avoid full site-packages scans for direct reinstalls ([#20119](astral-sh/uv#20119)) - Avoid redundant pyproject parsing ([#20076](astral-sh/uv#20076)) - Cache default dependency markers when reading locks ([#20125](astral-sh/uv#20125)) - Enable SIMD-accelerated TOML parsing ([#20079](astral-sh/uv#20079)) - Intern `requires-python` specifiers in Simple API parsing ([#20104](astral-sh/uv#20104)) - Read cache entries into exact-sized buffers ([#20120](astral-sh/uv#20120)) - Reduce VersionSpecifiers parsing allocations ([#20105](astral-sh/uv#20105)) - Reduce site-packages scan allocation overhead ([#20087](astral-sh/uv#20087)) - Reuse package names when parsing wheel filenames ([#20110](astral-sh/uv#20110)) - Sort Simple API files after grouping ([#20112](astral-sh/uv#20112)) ##### Bug fixes - Always emit `packages` table for pylock.toml ([#20145](astral-sh/uv#20145)) - Avoid blank line for empty `uv pip tree` ([#20062](astral-sh/uv#20062)) - Encode hashes in file paths ([#19807](astral-sh/uv#19807)) - Error on a registry uv.lock package without a version instead of panicking ([#19855](astral-sh/uv#19855)) - Preserve conditional extra markers in exports ([#20148](astral-sh/uv#20148)) - Skip the ambiguous authority check for file transport VCS URLs ([#20086](astral-sh/uv#20086)) - Sync index format when `uv add --index` updates an existing index URL ([#19818](astral-sh/uv#19818)) ##### Other changes - Re-add `pub` APIs used in Pixi ([#20074](astral-sh/uv#20074)) - Update Rust toolchain to 1.96.1 ([#20103](astral-sh/uv#20103)) ### [`v0.11.26`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01126) [Compare Source](astral-sh/uv@0.11.25...0.11.26) Released on 2026-06-30. ##### Performance - Adapt uv to IDs-only PubGrub dependencies ([#20048](astral-sh/uv#20048)) - Avoid allocations in `ForkMap::contains` ([#20023](astral-sh/uv#20023)) - Reuse resolver work across PubGrub iterations ([#20020](astral-sh/uv#20020)) - Speed up candidate selection for disjoint ranges ([#20026](astral-sh/uv#20026)) ##### Bug fixes - Warn when the build cache is inside the source directory ([#20056](astral-sh/uv#20056)) ### [`v0.11.25`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01125) [Compare Source](astral-sh/uv@0.11.24...0.11.25) Released on 2026-06-26. ##### Security This release updates our tar library, [astral-tokio-tar](https://github.com/astral-sh/tokio-tar), to v0.6.3, which includes over 20 changes that harden our tar handling against [parser differentials](https://www.brainonfire.net/blog/2022/04/11/what-is-parser-mismatch/). uv may reject source distributions with malformed or ambiguous content that were previously accepted. See the [upstream commits](astral-sh/tokio-tar@v0.6.2...v0.6.3) for a full list of changes. ##### Enhancements - Add a full "lockfile" to tool receipts ([#18937](astral-sh/uv#18937)) - Allow scoped overrides to add dependencies ([#19974](astral-sh/uv#19974)) - Avoid writing redundant lockfile markers with `tool.uv.environments` ([#19933](astral-sh/uv#19933)) - Factor supported environments out of lockfile markers ([#19969](astral-sh/uv#19969)) - Recommend our own build backend in the build frontend ([#19994](astral-sh/uv#19994)) - Reject wheels with multiple .dist-info directories ([#19986](astral-sh/uv#19986)) - Simplify dependency markers under parent reachability ([#19971](astral-sh/uv#19971)) - Support scoped dependency exclusions ([#19977](astral-sh/uv#19977)) - Support scoped dependency overrides ([#19970](astral-sh/uv#19970)) - Explain why files are skipped in registry index parsing ([#19983](astral-sh/uv#19983)) ##### Preview features - Add `uv workspace list --scripts` ([#20009](astral-sh/uv#20009)) - Support centralised environments in `uv venv` ([#19912](astral-sh/uv#19912)) - Use locked ty versions in `uv check` ([#19884](astral-sh/uv#19884)) - Add centralized storage of project environments ([#18214](astral-sh/uv#18214)) - Verify lockfile hashes before reusing a cached ty in `uv check` ([#19995](astral-sh/uv#19995)) - Use locked dependency selection for `uv check --script` ([#19989](astral-sh/uv#19989)) ##### Bug fixes - Preserve standalone markers in workspace metadata ([#20011](astral-sh/uv#20011)) - Reject `uv build` if the cache dir is enclosed ([#19991](astral-sh/uv#19991)) ### [`v0.11.24`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01124) [Compare Source](astral-sh/uv@0.11.23...0.11.24) Released on 2026-06-23. ##### Python - Add CPython 3.15.0b3 ([#19964](astral-sh/uv#19964)) ##### Preview features - Make project environments relocatable under preview ([#19965](astral-sh/uv#19965)) ##### Performance - Use a compact index for lazy version maps ([#19959](astral-sh/uv#19959)) ##### Bug fixes - Allow disabling `exclude-newer` ([#19934](astral-sh/uv#19934)) - Avoid archive id collisions ([#19949](astral-sh/uv#19949)) - Reapply "Fix transparent Python upgrades in project environments" ([#19928](astral-sh/uv#19928)) - Clean up partial tool entrypoint installs ([#19966](astral-sh/uv#19966)) - Fix relocatable `activate.fish` and broaden Fish version support ([#19856](astral-sh/uv#19856)) ### [`v0.11.23`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01123) [Compare Source](astral-sh/uv@0.11.22...0.11.23) Released on 2026-06-19. ##### Bug fixes - Revert "Fix transparent Python upgrades in project environments" to mitigate unintended breakage in `pre-commit-uv` ([#19925](astral-sh/uv#19925)) - Restore old behavior where workspace members "hidden" by an intermediate `pyproject.toml` would be treated as standalone projects ([#19926](astral-sh/uv#19926)) ### [`v0.11.22`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01122) [Compare Source](astral-sh/uv@0.11.21...0.11.22) Released on 2026-06-18. ##### Enhancements - Publish wheels before sdists in `uv publish` ([#19831](astral-sh/uv#19831)) - Add `TY` and `RUFF` env vars for providing paths for binaries used by `uv format` and `uv check` ([#19821](astral-sh/uv#19821)) ##### Preview features - Allow configuring preview features in `uv.toml` and `pyproject.toml` ([#18437](astral-sh/uv#18437)) - Update the lockfile during `uv check --no-sync` ([#19909](astral-sh/uv#19909)) - Add `--script` to `uv check` and `uv metadata` ([#19860](astral-sh/uv#19860)) - Report workspace-exclusive dependency groups in `workspace metadata` ([#19862](astral-sh/uv#19862)) - Support SARIF as a `uv audit` output ([#19872](astral-sh/uv#19872)) ##### Performance - Use a more deadlock-resistant concurrent hashmap in the resolver ([#19532](astral-sh/uv#19532)) ##### Bug fixes - Update string marker ordering semantics to match [upstream clarified rules](pypa/packaging.python.org#1988) ([#19808](astral-sh/uv#19808)) - Reject extras that have the same normalized name ([#19871](astral-sh/uv#19871)) - Reject dependency group `include-group` entries that have additional fields ([#19866](astral-sh/uv#19866)) - Reject invalid UTF-8 URL credentials ([#19814](astral-sh/uv#19814)) - Validate that PEP 517 `backend-path`s exist when building sdists ([#19834](astral-sh/uv#19834)) - Validate that `pylock.toml` files do not have an unsupported a `lock-version` ([#19869](astral-sh/uv#19869)) - Validate that the environment satisfies the `packages.requires-python` of a `pylock.toml` ([#19868](astral-sh/uv#19868)) - Allow `uv` to be recursively invoked by PEP 517 build hooks ([#19879](astral-sh/uv#19879)) - Allow empty `credentials.toml` files ([#19815](astral-sh/uv#19815)) - Fix transparent Python upgrades in project environments ([#19890](astral-sh/uv#19890)) - Handle non-file editable URLs in `uv pip list` ([#19867](astral-sh/uv#19867)) - Fix incorrect output from `uv tree --invert` ([#19910](astral-sh/uv#19910)) - Fix environment locking of `uv venv` in a project ([#19837](astral-sh/uv#19837)) - Fix handling of workspace-exclusive dependency groups in `uv tree` ([#19905](astral-sh/uv#19905)) ##### Documentation - Archive the 0.10.x changelog ([#19813](astral-sh/uv#19813)) ##### Other changes - Mark more tests as requiring network for vendors that need to run tests offline ([#19819](astral-sh/uv#19819)) </details> --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - At any time (no schedule defined) - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this MR, check this box --- This MR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate).

This PR contains the following updates: | Package | Update | Change | |---|---|---| | [uv](https://github.com/astral-sh/uv) | patch | `0.11.24` → `0.11.28` | --- ### Release Notes <details> <summary>astral-sh/uv (uv)</summary> ### [`v0.11.28`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01128) [Compare Source](astral-sh/uv@0.11.27...0.11.28) Released on 2026-07-07. ##### Security This release updates our ZIP library, [astral-async-zip](https://github.com/astral-sh/rs-async-zip), to v0.0.20, which includes 15 changes that harden our ZIP handling against [parser differentials](https://www.brainonfire.net/blog/2022/04/11/what-is-parser-mismatch/). uv may reject ZIP archives with malformed or ambiguous content that were previously accepted. See the [upstream commits](astral-sh/rs-async-zip@v0.0.18...v0.0.20) for a full list of changes. ##### Python - Upgrade GraalPy to 25.1.3 ([#20069](astral-sh/uv#20069)) ##### Enhancements - Improve trace logs for unexpected error chains ([#20220](astral-sh/uv#20220)) - Move lockfile update guidance to a hint ([#20219](astral-sh/uv#20219)) - Preserve indentation for multiline error causes ([#20156](astral-sh/uv#20156)) - Render user errors with their cause chains ([#20217](astral-sh/uv#20217)) - Route final command errors through the printer to respect `-q` and `-qq` ([#20163](astral-sh/uv#20163)) - Use standard rendering for `uv build` errors ([#20159](astral-sh/uv#20159)) - Use standard rendering for tool requirement errors ([#20160](astral-sh/uv#20160)) ##### Performance - Only compile bytecode for installed distributions in `uv pip install` ([#19914](astral-sh/uv#19914)) - Avoid allocating URL-safe Git revisions ([#20194](astral-sh/uv#20194)) - Avoid allocating canonical Python request strings ([#20193](astral-sh/uv#20193)) - Avoid allocating custom Astral mirror URLs ([#20204](astral-sh/uv#20204)) - Avoid allocating expanded compatibility tags ([#20190](astral-sh/uv#20190)) - Avoid allocating shell strings that need no escaping ([#20196](astral-sh/uv#20196)) - Avoid allocating static ABI descriptions ([#20201](astral-sh/uv#20201)) - Avoid allocating static Windows executable names ([#20200](astral-sh/uv#20200)) - Avoid allocating static dependency table names ([#20199](astral-sh/uv#20199)) - Avoid allocating static platform triple components ([#20195](astral-sh/uv#20195)) - Avoid allocating static resolver report labels ([#20198](astral-sh/uv#20198)) - Avoid allocating static unavailable-version messages ([#20197](astral-sh/uv#20197)) - Avoid allocating unchanged Python download architectures ([#20202](astral-sh/uv#20202)) - Avoid allocating unchanged paths during case normalization ([#20203](astral-sh/uv#20203)) - Avoid allocations when expanding group conflicts ([#20211](astral-sh/uv#20211)) - Avoid allocations when formatting requirements ([#20206](astral-sh/uv#20206)) - Avoid cloning credential lookup services ([#20210](astral-sh/uv#20210)) - Avoid cloning dry-run distributions ([#20209](astral-sh/uv#20209)) - Avoid cloning owned dependency metadata ([#20212](astral-sh/uv#20212)) - Avoid redundant direct URL clones ([#20207](astral-sh/uv#20207)) - Create metadata version errors lazily ([#20205](astral-sh/uv#20205)) - Optimize expanded tag compatibility checks ([#20171](astral-sh/uv#20171)) - Optimize parsing of single-digit three-part versions ([#20118](astral-sh/uv#20118)) ##### Bug fixes - Avoid overflow when computing HTTP cache age ([#20178](astral-sh/uv#20178)) - Respect `--upgrade` when `upgrade-package` is configured ([#19955](astral-sh/uv#19955)) - Support `uv tree` in dependency-group-only projects ([#20167](astral-sh/uv#20167)) - Treat cache entries as stale at exact expiration ([#20183](astral-sh/uv#20183)) ### [`v0.11.27`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01127) [Compare Source](astral-sh/uv@0.11.26...0.11.27) Released on 2026-07-06. ##### Enhancements - Continue on ignored errors when fetching wheel metadata ([#12255](astral-sh/uv#12255)) - Use caching for `--python-downloads-json-url` ([#16749](astral-sh/uv#16749)) ##### Preview features - Discover extensionless shebang scripts in `uv workspace list --scripts` ([#20099](astral-sh/uv#20099)) ##### Performance - Avoid full site-packages scans for direct reinstalls ([#20119](astral-sh/uv#20119)) - Avoid redundant pyproject parsing ([#20076](astral-sh/uv#20076)) - Cache default dependency markers when reading locks ([#20125](astral-sh/uv#20125)) - Enable SIMD-accelerated TOML parsing ([#20079](astral-sh/uv#20079)) - Intern `requires-python` specifiers in Simple API parsing ([#20104](astral-sh/uv#20104)) - Read cache entries into exact-sized buffers ([#20120](astral-sh/uv#20120)) - Reduce VersionSpecifiers parsing allocations ([#20105](astral-sh/uv#20105)) - Reduce site-packages scan allocation overhead ([#20087](astral-sh/uv#20087)) - Reuse package names when parsing wheel filenames ([#20110](astral-sh/uv#20110)) - Sort Simple API files after grouping ([#20112](astral-sh/uv#20112)) ##### Bug fixes - Always emit `packages` table for pylock.toml ([#20145](astral-sh/uv#20145)) - Avoid blank line for empty `uv pip tree` ([#20062](astral-sh/uv#20062)) - Encode hashes in file paths ([#19807](astral-sh/uv#19807)) - Error on a registry uv.lock package without a version instead of panicking ([#19855](astral-sh/uv#19855)) - Preserve conditional extra markers in exports ([#20148](astral-sh/uv#20148)) - Skip the ambiguous authority check for file transport VCS URLs ([#20086](astral-sh/uv#20086)) - Sync index format when `uv add --index` updates an existing index URL ([#19818](astral-sh/uv#19818)) ##### Other changes - Re-add `pub` APIs used in Pixi ([#20074](astral-sh/uv#20074)) - Update Rust toolchain to 1.96.1 ([#20103](astral-sh/uv#20103)) ### [`v0.11.26`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01126) [Compare Source](astral-sh/uv@0.11.25...0.11.26) Released on 2026-06-30. ##### Performance - Adapt uv to IDs-only PubGrub dependencies ([#20048](astral-sh/uv#20048)) - Avoid allocations in `ForkMap::contains` ([#20023](astral-sh/uv#20023)) - Reuse resolver work across PubGrub iterations ([#20020](astral-sh/uv#20020)) - Speed up candidate selection for disjoint ranges ([#20026](astral-sh/uv#20026)) ##### Bug fixes - Warn when the build cache is inside the source directory ([#20056](astral-sh/uv#20056)) ### [`v0.11.25`](https://github.com/astral-sh/uv/blob/HEAD/CHANGELOG.md#01125) [Compare Source](astral-sh/uv@0.11.24...0.11.25) Released on 2026-06-26. ##### Security This release updates our tar library, [astral-tokio-tar](https://github.com/astral-sh/tokio-tar), to v0.6.3, which includes over 20 changes that harden our tar handling against [parser differentials](https://www.brainonfire.net/blog/2022/04/11/what-is-parser-mismatch/). uv may reject source distributions with malformed or ambiguous content that were previously accepted. See the [upstream commits](astral-sh/tokio-tar@v0.6.2...v0.6.3) for a full list of changes. ##### Enhancements - Add a full "lockfile" to tool receipts ([#18937](astral-sh/uv#18937)) - Allow scoped overrides to add dependencies ([#19974](astral-sh/uv#19974)) - Avoid writing redundant lockfile markers with `tool.uv.environments` ([#19933](astral-sh/uv#19933)) - Factor supported environments out of lockfile markers ([#19969](astral-sh/uv#19969)) - Recommend our own build backend in the build frontend ([#19994](astral-sh/uv#19994)) - Reject wheels with multiple .dist-info directories ([#19986](astral-sh/uv#19986)) - Simplify dependency markers under parent reachability ([#19971](astral-sh/uv#19971)) - Support scoped dependency exclusions ([#19977](astral-sh/uv#19977)) - Support scoped dependency overrides ([#19970](astral-sh/uv#19970)) - Explain why files are skipped in registry index parsing ([#19983](astral-sh/uv#19983)) ##### Preview features - Add `uv workspace list --scripts` ([#20009](astral-sh/uv#20009)) - Support centralised environments in `uv venv` ([#19912](astral-sh/uv#19912)) - Use locked ty versions in `uv check` ([#19884](astral-sh/uv#19884)) - Add centralized storage of project environments ([#18214](astral-sh/uv#18214)) - Verify lockfile hashes before reusing a cached ty in `uv check` ([#19995](astral-sh/uv#19995)) - Use locked dependency selection for `uv check --script` ([#19989](astral-sh/uv#19989)) ##### Bug fixes - Preserve standalone markers in workspace metadata ([#20011](astral-sh/uv#20011)) - Reject `uv build` if the cache dir is enclosed ([#19991](astral-sh/uv#19991)) </details> --- ### Configuration 📅 **Schedule**: (in timezone Europe/London) - Branch creation - At any time (no schedule defined) - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate).  Reviewed-on: https://forgejo.hayden.moe/hayden/phoebe/pulls/203

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Comment thread crates/uv-python/src/downloads.rs Outdated

MeitarR force-pushed the followup-16542 branch from 770a122 to 3a1a707 Compare June 13, 2026 16:41

MeitarR requested a review from konstin June 13, 2026 16:52

MeitarR added 2 commits July 3, 2026 18:17

Cache the remote Python downloads JSON via CachedClient

db269b4

Switch the downloads JSON fetch from BaseClient to CachedClient so that uv commands that only need the list for a prerelease warning or a dry-run can hit the cache instead of going to the network every time.

always AllowStale when offline

dd5f621

MeitarR force-pushed the followup-16542 branch from 3a1a707 to dd5f621 Compare July 3, 2026 15:17

konstin added 2 commits July 4, 2026 12:34

Remove redundant comment

207ba73

Don't discard retry count

5266ec1

konstin added 3 commits July 4, 2026 13:15

Cache JSON instead of bytes

8f2039b

This avoids caching invalid JSON, and avoid the double deserialization cost from the cache.

Only construct the client if we need it

c13423b

We usually don't need this client, so we only construct it if it's requested.

Simplify with match

3760561

konstin approved these changes Jul 4, 2026

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konstin changed the title ~~Follow-up from #16542~~ Use caching for --python-downloads-json-url Jul 4, 2026

konstin added the enhancement New feature or improvement to existing functionality label Jul 4, 2026

Improve error handling

fc49bc5

konstin merged commit af0a961 into astral-sh:main Jul 4, 2026
174 of 175 checks passed

BrewTestBot mentioned this pull request Jul 6, 2026

uv 0.11.27 Homebrew/homebrew-core#291631

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Use caching for `--python-downloads-json-url`#16749

Use caching for `--python-downloads-json-url`#16749
konstin merged 8 commits into
astral-sh:mainfrom
MeitarR:followup-16542

MeitarR commented Nov 15, 2025 •

edited by konstin

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MeitarR commented Apr 13, 2026

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konstin May 26, 2026

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MeitarR Jun 5, 2026

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codspeed-hq Bot commented Jul 4, 2026 •

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MeitarR commented Nov 15, 2025 • edited by konstin Loading Uh oh! There was an error while loading. Please reload this page.

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MeitarR commented Apr 13, 2026

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uv test inventory changes

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konstin May 26, 2026

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codspeed-hq Bot commented Jul 4, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Merging this PR will degrade performance by 5.41%

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MeitarR commented Nov 15, 2025 •

edited by konstin

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astral-sh-bot Bot commented May 22, 2026 •

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codspeed-hq Bot commented Jul 4, 2026 •

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