Allow parallel gem retry by is-alnilam · Pull Request #1732 · j178/prek

is-alnilam · 2026-03-01T23:27:53Z

Fix for #1731

Especially on Windows, installing Ruby gems in parallel can fail with a race condition as gemspec files are written simultaneously, and can be read in a part-written form. This change implements a retry/fallback strategy to handle this and still keep the majority of the performance gains of the parallel installation path.

Try installing in parallel as before.
If there's an error (of any kind), try each gem again after a short, random delay. The delay is there to try to introduce a bit of jitter, in case multiple gems all failed and they all then try to install at exactly the same time again.
If that fails too, automatically fall back to sequential install. This will re-use any gems that were already installed in parallel.

In the happy path case, this has no impact to runtime. This will almost always be the case on Unix-based systems.

The next path has a slight slow-down due to the retry and the pause, but it's still pretty quick.

And in the final case, hopefully a fair amount of the work has already been done.

The drawback of the above, of course, is that it's more complex than the basic parallel path, and even that's more complex than the basic sequential process.

The change also includes a tweak to the tests, where the 'waiting for lock' message occasionally appeared (which may coincide with occasions when the retry behaviour above was triggered). The warning is now filtered out and ignored by the tests.

As this is a race condition it's hard to guarantee that this fixes the problem, but I've run 15 cycles of the windows/ruby test in CI and have seen no failures.

When installing gems for Ruby hooks, prek resolves the dependency graph with `gem install --explain` then installs each gem in parallel using separate `gem install --ignore-dependencies` processes. These concurrent processes write gemspec files to a shared `GEM_HOME/specifications/` directory, and can race when one process reads a gemspec that another is still writing. RubyGems' `Gem::Specification.load` returns `nil` for the partially-written file, which then crashes with: > `NoMethodError: undefined method 'full_name' for nil` This is more likely on Windows because NTFS lacks the atomic rename semantics that POSIX filesystems provide. On Linux/macOS, gemspec writes use a temp-file-then-rename pattern that is atomic, so readers see either the old or complete new file. On Windows the race window is wider, and this was observed as a flaky failure in CI (Ruby 3.4.8, windows-latest). This change adds a three-layer resilience strategy: 1. On per-gem failure, retry once after a random 50-500ms delay (jitter lets the writing process finish and desynchronizes concurrent retries if multiple gems have failed to install) 2. If the retry also fails, fall back to sequential gem installation. Already-installed gems from the parallel phase are retained in `GEM_HOME` and skipped by the sequential pass 3. If sequential installation also fails, return the error as before

When parallel test execution causes prek subprocesses to contend on the Ruby toolchain lock, a non-deterministic warning appears in stderr that breaks the snapshot assertion. Filter it out.

codecov · 2026-03-01T23:29:23Z

Codecov Report

❌ Patch coverage is 38.09524% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.58%. Comparing base (e993b04) to head (6022902).
⚠️ Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/prek/src/languages/ruby/gem.rs	38.09%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1732      +/-   ##
==========================================
- Coverage   91.61%   91.58%   -0.03%     
==========================================
  Files          97       97              
  Lines       19241    19258      +17     
==========================================
+ Hits        17627    17637      +10     
- Misses       1614     1621       +7

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prek-ci-bot · 2026-03-01T23:33:34Z

📦 Cargo Bloat Comparison

Binary size change: +0.00% (23.9 MiB → 23.9 MiB)

Expand for cargo-bloat output

Head Branch Results

 File  .text    Size             Crate Name
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38.4%  91.8%  9.2MiB                   And 21172 smaller methods. Use -n N to show more.
41.8% 100.0% 10.0MiB                   .text section size, the file size is 23.9MiB

Base Branch Results

 File  .text    Size             Crate Name
 0.3%   0.7% 71.7KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.7% 69.3KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.3%   0.6% 65.6KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.2%   0.5% 51.2KiB annotate_snippets annotate_snippets::renderer::render::render
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 0.2%   0.4% 39.5KiB              prek prek::run::{{closure}}
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 0.1%   0.3% 28.5KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2% 24.7KiB             prek? <prek::config::_::<impl serde_core::de::Deserialize for prek::config::Config>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map
 0.1%   0.2% 22.8KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2% 22.7KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2% 21.7KiB               std core::ptr::drop_in_place<prek::languages::<impl prek::config::Language>::install::{{closure}}>
 0.1%   0.2% 21.4KiB              prek prek::languages::ruby::installer::RubyInstaller::install::{{closure}}
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 0.1%   0.2% 18.6KiB     serde_saphyr? <serde_saphyr::de::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map
38.4%  91.8%  9.2MiB                   And 21158 smaller methods. Use -n N to show more.
41.8% 100.0% 10.0MiB                   .text section size, the file size is 23.9MiB

Copilot

Pull request overview

Implements a more resilient Ruby gem installation flow to mitigate Windows-specific race conditions during parallel installs, while keeping the performance benefits of parallelism when it works.

Changes:

Add per-gem retry with randomized jitter when a parallel gem install fails, then fall back to sequential install if needed.
Filter nondeterministic “Waiting to acquire lock” warnings out of insta snapshots to reduce flaky test output.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
crates/prek/src/languages/ruby/gem.rs	Adds retry-with-jitter around parallel gem installs and a sequential fallback on persistent failure.
crates/prek/tests/common/mod.rs	Adds an insta filter to strip lock-contention warning lines from snapshots.

j178 · 2026-03-03T09:06:45Z

Thanks!

This MR contains the following updates: | Package | Update | Change | |---|---|---| | [prek](https://github.com/j178/prek) | patch | `0.3.1` → `0.3.13` | 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>j178/prek (prek)</summary> ### [`v0.3.13`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#0313) [Compare Source](j178/prek@v0.3.12...v0.3.13) Released on 2026-05-06. ##### Bug fixes - Respect hook filters for message files ([#2049](j178/prek#2049)) ##### Documentation - Add Godot Engine to users in README ([#2047](j178/prek#2047)) ##### Contributors - [@j178](https://github.com/j178) - [@Calinou](https://github.com/Calinou) ### [`v0.3.12`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#0312) [Compare Source](j178/prek@v0.3.11...v0.3.12) Released on 2026-05-05. ##### Highlights `auto_update.cooldown_days` is now available in both the user-level global config (`~/.config/prek/prek.toml` on Linux and macOS, or `$XDG_CONFIG_HOME/prek/prek.toml` when set; `%APPDATA%\prek\prek.toml` on Windows) and project config. Set a user default for `prek auto-update`, then override it per project when a repository needs a different update cadence. ```toml [auto_update] cooldown_days = 7 ``` ##### Enhancements - Add global auto-update cooldown config ([#2041](j178/prek#2041)) - Add project auto-update cooldown config ([#2044](j178/prek#2044)) - Support `language: dart` ([#1146](j178/prek#1146)) ##### Bug fixes - Pass commit message file to workspace hooks ([#2043](j178/prek#2043)) - Preserve non-UTF8 filenames from git ([#2023](j178/prek#2023)) - ruby: put resolved Ruby's bin dir on `$PATH` for `gem` invocations ([#2021](j178/prek#2021)) ##### Documentation - Update docs with the new logo and icon ([#2025](j178/prek#2025)) - Point schema docs to SchemaStore ([#2039](j178/prek#2039)) ##### Contributors - [@j178](https://github.com/j178) - [@xiaoyanli-lyft](https://github.com/xiaoyanli-lyft) - [@Lutra-Fs](https://github.com/Lutra-Fs) ### [`v0.3.11`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#0311) [Compare Source](j178/prek@v0.3.10...v0.3.11) Released on 2026-04-27. ##### Highlights Hook entries now have an explicit `shell` option for shell snippets. Set `shell: sh`, `bash`, `pwsh`, `powershell`, or `cmd` when an entry should be evaluated by that shell; leaving it unset keeps prek's direct argv execution. `prek auto-update` can now filter tag candidates before choosing an update. Both options take glob patterns: use `--include-tag` to only consider matching tag names, and `--exclude-tag` to skip matching tags such as moving tags or prereleases. ##### Enhancements - Add `auto-update --exclude-repo <repo>` to skip repos ([#1983](j178/prek#1983)) - Add `auto-update --exit-code` to exit with non-zero on updates ([#2002](j178/prek#2002)) - Add `auto-update --include-tag <pattern>`/`--exclude-tag <pattern>` to filter tags ([#1984](j178/prek#1984)) - Adds an explicit `shell` hook option for entries that should run as shell source ([#2004](j178/prek#2004)) - Make `--hook-dir` optional for hook-impl ([#1989](j178/prek#1989)) - Skip shim warning when `--script-version` is missing ([#1990](j178/prek#1990)) ##### Bug fixes - Install Ruby executable in gem bin ([#2017](j178/prek#2017)) - Use dedicated Android npm package ([#1982](j178/prek#1982)) - Use stable repo keys without breaking cached clones ([#1995](j178/prek#1995)) ##### Documentation - Explain prek name ([#1980](j178/prek#1980)) - Clarify `pass_filenames` concurrency docs ([#1999](j178/prek#1999)) - Reorganize documentation references ([#2005](j178/prek#2005)) - Clarify hook author manifest env docs ([#1991](j178/prek#1991)) - docs: add Sentry to users list ([#1981](j178/prek#1981)) ##### Contributors - [@j178](https://github.com/j178) ### [`v0.3.10`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#0310) [Compare Source](j178/prek@v0.3.9...v0.3.10) Released on 2026-04-21. ##### Enhancements - Disallow rev for non-remote repos in schema ([#1964](j178/prek#1964)) - Hide up-to-date output in non-verbose mode ([#1942](j178/prek#1942)) - Improve merge conflict marker detection ([#1937](j178/prek#1937)) - Keep finished hooks visible ([#1967](j178/prek#1967)) - Preserve frozen comment spacing in auto-update ([#1945](j178/prek#1945)) - Reimplement `@j178/prek` npm package ([#1973](j178/prek#1973)) ##### Bug fixes - Prefer stable Rust toolchains ([#1974](j178/prek#1974)) ##### Documentation - Add `SKILL.md` for prek ([#1950](j178/prek#1950)) - Document `gh skill install j178/prek prek` to install prek skill for agents ([#1951](j178/prek#1951)) - Improve compatibility and migration docs ([#1940](j178/prek#1940)) ##### Other changes - Sync latest identify tags ([#1947](j178/prek#1947)) ##### Contributors - [@github-actions](https://github.com/github-actions) - [@renovate](https://github.com/renovate) - [@j178](https://github.com/j178) ### [`v0.3.9`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#039) [Compare Source](j178/prek@v0.3.8...v0.3.9) Released on 2026-04-13. ##### Highlight `prek auto-update` is now stricter about pinned revisions and more useful in CI. It now keeps `rev` and `# frozen:` comments in sync, can detect [impostor commits](https://docs.zizmor.sh/audits/#impostor-commit) when validating pinned SHAs, and lets you use `prek auto-update --check` to fail on both available updates and frozen-ref mismatches without rewriting the config. Examples: ```console $ prek auto-update # updates revs and repairs stale `# frozen:` comments $ prek auto-update --freeze # writes frozen SHAs with matching `# frozen: <tag>` comments $ prek auto-update --check # exits non-zero when updates are available, a `# frozen:` comment is stale, # or a pinned SHA does not belong to the fetched upstream refs ``` ##### Enhancements - Check and sync frozen comments during auto-update ([#1896](j178/prek#1896)) - Handle impostor commits in auto-update ([#1919](j178/prek#1919)) - Add experimental `language: dotnet` support ([#1871](j178/prek#1871)) - Honor repo and worktree `core.hooksPath` ([#1892](j178/prek#1892)) - Add `prek run --no-fail-fast` to override config file ([#1859](j178/prek#1859)) - Add `forbid-new-submodules` as builtin hook ([#1853](j178/prek#1853)) - Clean stale patch files in `cache gc` ([#1877](j178/prek#1877)) - Display auto-update results by config entry ([#1922](j178/prek#1922)) - Restrict patch directory permissions ([#1876](j178/prek#1876)) - Show tag names in `auto-update --freeze` output ([#1916](j178/prek#1916)) - Use a bitset for hook stages ([#1860](j178/prek#1860)) ##### Bug fixes - Canonicalize CWD and GIT\_ROOT paths ([#1878](j178/prek#1878)) - Ensure quotes are added for non-string revisions in `auto-update` ([#1936](j178/prek#1936)) ##### Documentation - Update docs for case of hooks modifying files with a non-zero exit code ([#1879](j178/prek#1879)) ##### Contributors - [@RicardoVercetti](https://github.com/RicardoVercetti) - [@nathanjmcdougall](https://github.com/nathanjmcdougall) - [@renovate](https://github.com/renovate) - [@sadjow](https://github.com/sadjow) - [@j178](https://github.com/j178) ### [`v0.3.8`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#038) [Compare Source](j178/prek@v0.3.6...v0.3.8) Released on 2026-03-23. ##### Enhancements - Add experimental `language: deno` support ([#1516](j178/prek#1516)) - Add `pretty-format-json` as builtin hook ([#915](j178/prek#915)) - Add `check-vcs-permalinks` as builtin hook ([#1842](j178/prek#1842)) - Add `check-illegal-windows-names` as builtin hook ([#1841](j178/prek#1841)) - Add `check-shebang-scripts-are-executable` builtin hook ([#1847](j178/prek#1847)) - Add `destroyed-symlinks` builtin hook ([#1851](j178/prek#1851)) - Add `file-contents-sorter` as builtin hook ([#1846](j178/prek#1846)) - Add `--all` flag to `prek uninstall` ([#1817](j178/prek#1817)) - Improve file pattern parse errors ([#1829](j178/prek#1829)) - Validate `uv` binary after download ([#1825](j178/prek#1825)) ##### Bug fixes - Fix workspace-relative added file paths ([#1852](j178/prek#1852)) - Relax alias-anchor ratio check for check-yaml ([#1839](j178/prek#1839)) ##### Contributors - [@j178](https://github.com/j178) - [@shaanmajid](https://github.com/shaanmajid) - [@mvanhorn](https://github.com/mvanhorn) - [@feliblo](https://github.com/feliblo) - [@Tiryoh](https://github.com/Tiryoh) ### [`v0.3.6`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#036) [Compare Source](j178/prek@v0.3.5...v0.3.6) Released on 2026-03-16. ##### Enhancements - Allow selectors for hook ids containing colons ([#1782](j178/prek#1782)) - Rename `prek install-hooks` to `prek prepare-hooks` and `prek install --install-hooks` to `prek install --prepare-hooks` ([#1766](j178/prek#1766)) - Retry auth-failed repo clones with terminal prompts enabled ([#1761](j178/prek#1761)) ##### Performance - Optimize `detect_private_key` by chunked reading and using aho-corasick ([#1791](j178/prek#1791)) - Optimize `fix_byte_order_marker` by shifting file contents in place ([#1790](j178/prek#1790)) ##### Bug fixes - Align stage defaulting behavior with pre-commit ([#1788](j178/prek#1788)) - Make sure child output is drained in the PTY subprocess ([#1768](j178/prek#1768)) - fix(golang): use `GOTOOLCHAIN=local` when probing system go ([#1797](j178/prek#1797)) ##### Documentation - Disambiguate “hook” terminology by renaming "Git hooks" to "Git shims" ([#1776](j178/prek#1776)) - Document compatibility with pre-commit ([#1767](j178/prek#1767)) - Update configuration.md with TOML 1.1 notes ([#1764](j178/prek#1764)) ##### Other changes - Sync latest identify tags ([#1798](j178/prek#1798)) ##### Contributors - [@github-actions](https://github.com/github-actions) - [@j178](https://github.com/j178) - [@pcastellazzi](https://github.com/pcastellazzi) - [@deadnews](https://github.com/deadnews) - [@copilot-swe-agent](https://github.com/copilot-swe-agent) ### [`v0.3.5`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#035) [Compare Source](j178/prek@v0.3.4...v0.3.5) Released on 2026-03-09. ##### Enhancements - Add automatic Ruby download support using rv binaries ([#1668](j178/prek#1668)) - Adjust open file limit on process startup ([#1705](j178/prek#1705)) - Allow parallel gem retry ([#1732](j178/prek#1732)) - Enable system-proxy feature on reqwest ([#1738](j178/prek#1738)) - Expose `--git-dir` to force hook installation target ([#1723](j178/prek#1723)) - Pass `--quiet`, `--verbose`, and `--no-progress` through `prek install` into generated hook scripts ([#1753](j178/prek#1753)) - Respect `core.sharedRepository` for hook permissions ([#1755](j178/prek#1755)) - Support legacy mode hook script ([#1706](j178/prek#1706)) - rust: support `cli:` git dependency 4th segment package disambiguation ([#1747](j178/prek#1747)) ##### Bug fixes - Fix Python `__main__.py` entry ([#1741](j178/prek#1741)) - python: strip `UV_SYSTEM_PYTHON` from `uv venv` and `pip install` commands ([#1756](j178/prek#1756)) ##### Other changes - Sync latest identify tags ([#1733](j178/prek#1733)) ##### Contributors - [@Dev-iL](https://github.com/Dev-iL) - [@tennox](https://github.com/tennox) - [@shaanmajid](https://github.com/shaanmajid) - [@is-alnilam](https://github.com/is-alnilam) - [@github-actions](https://github.com/github-actions) - [@j178](https://github.com/j178) ### [`v0.3.4`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#034) [Compare Source](j178/prek@v0.3.3...v0.3.4) Released on 2026-02-28. ##### Enhancements - Allow `pass_filenames` to accept a positive integer ([#1698](j178/prek#1698)) - Install and compile gems in parallel ([#1674](j178/prek#1674)) - Sync identify file-type mappings with pre-commit identify ([#1660](j178/prek#1660)) - Use `--locked` for Rust `cargo install` commands ([#1661](j178/prek#1661)) - Add `PREK_MAX_CONCURRENCY` environment variable for configuring maximum concurrency ([#1697](j178/prek#1697)) - Add `PREK_LOG_TRUNCATE_LIMIT` environment variable for configuring log truncation ([#1679](j178/prek#1679)) - Add support for `python -m prek` ([#1686](j178/prek#1686)) ##### Bug fixes - Skip invalid Rust toolchains instead of failing ([#1699](j178/prek#1699)) ##### Performance - Bitset-based TagSet refactor: precompute tag masks and speed up hook type filtering ([#1665](j178/prek#1665)) ##### Documentation - Document `winget install j178.Prek` ([#1670](j178/prek#1670)) ##### Contributors - [@uplsh580](https://github.com/uplsh580) - [@Svecco](https://github.com/Svecco) - [@dbast](https://github.com/dbast) - [@drichardson](https://github.com/drichardson) - [@JP-Ellis](https://github.com/JP-Ellis) - [@j178](https://github.com/j178) - [@is-alnilam](https://github.com/is-alnilam) - [@copilot-swe-agent](https://github.com/copilot-swe-agent) ### [`v0.3.3`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#033) [Compare Source](j178/prek@v0.3.2...v0.3.3) Released on 2026-02-15. ##### Enhancements - Read Python version specifier from hook repo `pyproject.toml` ([#1596](j178/prek#1596)) - Add `#:schema` directives to generated prek.toml ([#1597](j178/prek#1597)) - Add `prek util list-builtins` command ([#1600](j178/prek#1600)) - Expand install source detection to `mise`, `uv tool`, `pipx`, and `asdf` ([#1605](j178/prek#1605), [#1607](j178/prek#1607)) - Add progress bar to `cache clean` and show removal summary ([#1616](j178/prek#1616)) - Make `yaml-to-toml` CONFIG argument optional ([#1593](j178/prek#1593)) - `prek uninstall` removes legacy scripts too ([#1622](j178/prek#1622)) ##### Bug fixes - Fix underflow when formatting summary output ([#1626](j178/prek#1626)) - Match `files/exclude` filter against relative path of nested project ([#1624](j178/prek#1624)) - Select `musllinux` wheel tag for uv on musl-based distros ([#1628](j178/prek#1628)) ##### Documentation - Clarify `prek list` description ([#1604](j178/prek#1604)) ##### Contributors - [@ichoosetoaccept](https://github.com/ichoosetoaccept) - [@shaanmajid](https://github.com/shaanmajid) - [@soraxas](https://github.com/soraxas) - [@9999years](https://github.com/9999years) - [@j178](https://github.com/j178) ### [`v0.3.2`](https://github.com/j178/prek/blob/HEAD/CHANGELOG.md#032) [Compare Source](j178/prek@v0.3.1...v0.3.2) Released on 2026-02-06. ##### Highlights - **`prek.toml` is here!** You can now use `prek.toml` as an alternative to `.pre-commit-config.yaml` for configuring prek. `prek.toml` mirrors the structure of `.pre-commit-config.yaml`, but TOML is less error-prone. Your existing `.pre-commit-config.yaml` will continue to work, but for new users and new projects, `prek.toml` may make more sense. If you want to switch, run `prek util yaml-to-toml` to convert YAML configs to `prek.toml`. See [configuration docs](configuration.md) for details. For example, this config: ```yaml repos: - repo: https://github.com/pre-commit/pre-commit-hooks rev: v6.0.0 hooks: - id: check-yaml ``` Can be written as `prek.toml` like this: ```toml [[repos]] repo = "https://github.com/pre-commit/pre-commit-hooks" rev = "v6.0.0" hooks = [ { id = "check-yaml" } ] ``` - **`serde-yaml` has been replaced with `serde-saphyr`** We replaced the long-deprecated `serde-yaml` crate with [`serde-saphyr`](https://crates.io/crates/serde-saphyr) for YAML parsing. It is written in safe Rust and has better error messages, performance, and security. This lets us provide precise location information for configuration parsing errors, which should make it easier to fix config issues. For example, this invalid config: ```yaml repos: - repo: https://github.com/crate-ci/typos hooks: - id: typos ``` Before: ```console $ prek run error: Failed to parse `.pre-commit-config.yaml` caused by: Invalid remote repo: missing field `rev` ``` Now: ```console $ prek run error: Failed to parse `.pre-commit-config.yaml` caused by: error: line 2 column 5: missing field `rev` at line 2, column 5 --> <input>:2:5 | 1 | repos: 2 | - repo: https://github.com/crate-ci/typos | ^ missing field `rev` at line 2, column 5 3 | hooks: 4 | - id: typos | ``` - **`prek util` subcommands** We added a new `prek util` top-level command for miscellaneous utilities that don't fit into other categories. The first two utilities are: - `prek util identify`: shows the identification tags of files that prek uses for file filtering, which can be useful for debugging and writing `types/types_or/exclude_types` filters. - `prek util yaml-to-toml`: converts `.pre-commit-config.yaml` to `prek.toml`. We also moved `prek init-template-dir` under `prek util` for better organization. The old `prek init-template-dir` command is still available (hidden) as an alias for backward compatibility. ##### Enhancements - Add `prek util identify` subcommand ([#1554](j178/prek#1554)) - Add `prek util yaml-to-toml` to convert `.pre-commit-config.yaml` to `prek.toml` ([#1584](j178/prek#1584)) - Detect install source for actionable upgrade hints ([#1540](j178/prek#1540)) - Detect prek installed by the standalone installer ([#1545](j178/prek#1545)) - Implement `serialize_yaml_scalar` using `serde-saphyr` ([#1534](j178/prek#1534)) - Improve max cli arguments length calculation ([#1518](j178/prek#1518)) - Move `identify` and `init-template-dir` under the `prek util` top-level command ([#1574](j178/prek#1574)) - Replace serde-yaml with serde-saphyr (again) ([#1520](j178/prek#1520)) - Show precise location for config parsing error ([#1530](j178/prek#1530)) - Support `Julia` language ([#1519](j178/prek#1519)) - Support `prek.toml` ([#1271](j178/prek#1271)) - Added `PREK_QUIET` environment variable support ([#1513](j178/prek#1513)) - Remove upper bound constraint of uv version ([#1588](j178/prek#1588)) ##### Bug fixes - Do not make the child a session leader ([#1586](j178/prek#1586)) - Fix FilePattern schema to accept plain strings ([#1564](j178/prek#1564)) - Use semver fallback sort when tag timestamps are equal ([#1579](j178/prek#1579)) ##### Documentation - Add `OpenClaw` to the list of users ([#1517](j178/prek#1517)) - Add `cachix/devenv`, `apache/lucene`, `copper-project/copper-rs` as projects using prek ([#1531](j178/prek#1531), [#1514](j178/prek#1514), [#1569](j178/prek#1569)) - Add document about authoring remote hooks ([#1571](j178/prek#1571)) - Add `llms.txt` generation for LLM-friendly documentation ([#1553](j178/prek#1553)) - Document using `--refresh` to pick up `.prekignore` changes ([#1575](j178/prek#1575)) - Fix PowerShell completion instruction syntax ([#1568](j178/prek#1568)) - Update quick start to use `prek.toml` ([#1576](j178/prek#1576)) ##### Other changes - Include `prek.toml` in run hint for config filename ([#1578](j178/prek#1578)) ##### Contributors - [@fatelei](https://github.com/fatelei) - [@domenkozar](https://github.com/domenkozar) - [@makeecat](https://github.com/makeecat) - [@fllesser](https://github.com/fllesser) - [@j178](https://github.com/j178) - [@copilot-swe-agent](https://github.com/copilot-swe-agent) - [@oopscompiled](https://github.com/oopscompiled) - [@rmuir](https://github.com/rmuir) - [@shaanmajid](https://github.com/shaanmajid) </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).

is-alnilam added 2 commits March 1, 2026 21:20

Filter non-deterministic 'waiting for lock' warnings

6022902

When parallel test execution causes prek subprocesses to contend on the Ruby toolchain lock, a non-deterministic warning appears in stderr that breaks the snapshot assertion. Filter it out.

is-alnilam requested a review from j178 as a code owner March 1, 2026 23:27

j178 requested a review from Copilot March 3, 2026 08:02

Copilot started reviewing on behalf of j178 March 3, 2026 08:03 View session

Copilot AI reviewed Mar 3, 2026

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Comment thread crates/prek/src/languages/ruby/gem.rs

Comment thread crates/prek/src/languages/ruby/gem.rs

j178 approved these changes Mar 3, 2026

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j178 merged commit 7264d6b into j178:master Mar 3, 2026
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j178 added the enhancement New feature or request label Mar 3, 2026

BrewTestBot mentioned this pull request Mar 9, 2026

prek 0.3.5 Homebrew/homebrew-core#271357

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Allow parallel gem retry#1732

Allow parallel gem retry#1732
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