v0.4 release

[j178]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 97.10145% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.32%. Comparing base (321f8b8) to head (2033130).

Files with missing lines	Patch %	Lines
crates/prek/src/languages/node/installer.rs	66.66%	1 Missing ⚠️
crates/prek/src/languages/rust/installer.rs	80.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #1968    +/-   ##
========================================
  Coverage   92.32%   92.32%            
========================================
  Files         119      119            
  Lines       24432    24328   -104     
========================================
- Hits        22558    22462    -96     
+ Misses       1874     1866     -8     

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[Copilot]

Pull request overview

Updates v0.4 documentation, tests, and language resolvers to remove absolute-path language_version support (Bun/Go/Node/Python/Ruby) and simplifies matching logic; also changes hook installation so generated Git hook scripts no longer embed global CLI flags.

Changes:

• Remove language_version absolute-path parsing/matching for Bun/Go/Node/Python/Ruby and update installers accordingly.
• Update hook installation code and snapshots so installed hook scripts no longer include global flags (-q/-v/--no-progress).
• Refresh docs and tests to reflect the new language_version formats and hook script output.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
docs/languages.md	Removes documentation claiming absolute-path language_version support for several languages.
docs/configuration.md	Adjusts Python language_version examples to match supported forms.
crates/prek/tests/languages/ruby.rs	Removes path-based Ruby language_version test coverage and simplifies config generation.
crates/prek/tests/install.rs	Updates install snapshots and removes tests asserting global flags are embedded in hook scripts.
crates/prek/src/main.rs	Stops passing global quiet/verbose/no-progress values into install/init-template-dir flows.
crates/prek/src/languages/rust/version.rs	Simplifies RustRequest::matches signature and updates tests.
crates/prek/src/languages/rust/installer.rs	Updates Rust installer matching calls to new signature.
crates/prek/src/languages/ruby/version.rs	Removes Ruby path request variant and related parsing/matching/tests.
crates/prek/src/languages/ruby/installer.rs	Updates Ruby installer matching calls to version-only matching.
crates/prek/src/languages/python/version.rs	Removes Python path request variant and updates parsing/docs/tests accordingly.
crates/prek/src/languages/python/python.rs	Removes conversion of Python path requests to uv requests.
crates/prek/src/languages/node/version.rs	Removes Node path request variant and updates parsing/matching/tests accordingly.
crates/prek/src/languages/node/installer.rs	Updates Node installer matching calls to version-only matching.
crates/prek/src/languages/golang/version.rs	Removes Go path request variant and updates parsing/matching/tests accordingly.
crates/prek/src/languages/golang/installer.rs	Updates Go installer matching calls to version-only matching.
crates/prek/src/languages/bun/version.rs	Removes Bun path request variant and updates parsing/matching/tests accordingly.
crates/prek/src/languages/bun/installer.rs	Updates Bun installer matching calls to version-only matching.
crates/prek/src/cli/install.rs	Removes rendering/injection of global args into generated hook scripts and simplifies the template.

[prek-ci-bot]

📦 Cargo Bloat Comparison

Binary size change: -0.38% (26.2 MiB → 26.1 MiB)

Expand for cargo-bloat output

Head Branch Results

 File  .text     Size             Crate Name
 1.2%   2.6% 332.0KiB        aws_lc_sys aws_lc_0_39_1_aes_gcm_encrypt_avx512
 1.2%   2.6% 332.0KiB        aws_lc_sys aws_lc_0_39_1_aes_gcm_decrypt_avx512
 0.3%   0.7%  90.9KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.7%  83.8KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.6%  74.7KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.2%   0.5%  65.5KiB              prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.4%  53.3KiB annotate_snippets annotate_snippets::renderer::render::render
 0.2%   0.4%  48.6KiB              prek prek::run::{{closure}}
 0.2%   0.3%  43.7KiB              prek prek::cli::run::run::run::{{closure}}
 0.1%   0.3%  33.3KiB             prek? <prek::cli::RunArgs as clap_builder::derive::Args>::augment_args
 0.1%   0.2%  32.0KiB             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%  28.7KiB               std core::ptr::drop_in_place<prek::languages::<impl prek::config::Language>::install::{{closure}}>
 0.1%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_39_1_edwards25519_scalarmuldouble_alt
 0.1%   0.2%  27.6KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_39_1_edwards25519_scalarmuldouble
 0.1%   0.2%  26.2KiB              prek prek::cli::try_repo::try_repo::{{closure}}
 0.1%   0.2%  24.4KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2%  22.5KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2%  22.3KiB         [Unknown] Lp384_montjscalarmul_alt_p384_montjadd
 0.1%   0.2%  21.5KiB      clap_builder clap_builder::parser::parser::Parser::get_matches_with
41.5%  86.2%  10.8MiB                   And 23927 smaller methods. Use -n N to show more.
48.1% 100.0%  12.6MiB                   .text section size, the file size is 26.1MiB

Base Branch Results

 File  .text     Size             Crate Name
 1.2%   2.6% 332.0KiB        aws_lc_sys aws_lc_0_39_1_aes_gcm_encrypt_avx512
 1.2%   2.6% 332.0KiB        aws_lc_sys aws_lc_0_39_1_aes_gcm_decrypt_avx512
 0.3%   0.7%  93.2KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.3%   0.7%  90.9KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.6%  83.7KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.2%   0.5%  65.5KiB              prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.4%  53.3KiB annotate_snippets annotate_snippets::renderer::render::render
 0.2%   0.3%  44.2KiB              prek prek::cli::run::run::run::{{closure}}
 0.1%   0.3%  36.2KiB              prek prek::run::{{closure}}
 0.1%   0.3%  33.0KiB             prek? <prek::cli::RunArgs as clap_builder::derive::Args>::augment_args
 0.1%   0.2%  32.0KiB             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%  28.7KiB               std core::ptr::drop_in_place<prek::languages::<impl prek::config::Language>::install::{{closure}}>
 0.1%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_39_1_edwards25519_scalarmuldouble_alt
 0.1%   0.2%  27.6KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_39_1_edwards25519_scalarmuldouble
 0.1%   0.2%  26.2KiB              prek prek::cli::try_repo::try_repo::{{closure}}
 0.1%   0.2%  24.4KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2%  22.5KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2%  22.3KiB         [Unknown] Lp384_montjscalarmul_alt_p384_montjadd
 0.1%   0.2%  21.5KiB      clap_builder clap_builder::parser::parser::Parser::get_matches_with
41.5%  86.2%  10.8MiB                   And 23907 smaller methods. Use -n N to show more.
48.1% 100.0%  12.6MiB                   .text section size, the file size is 26.2MiB

[prek-ci-bot]

⚡️ Hyperfine Benchmarks

Summary: 0 regressions, 0 improvements above the 10% threshold.

Environment

• OS: Linux 6.17.0-1010-azure
• CPU: 4 cores
• prek version: prek 0.3.13+21 (f35e9df 2026-05-14)
• Rust version: rustc 1.95.0 (59807616e 2026-04-14)
• Hyperfine version: hyperfine 1.20.0

CLI Commands

Benchmarking basic commands in the main repo:

prek --version

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base --version	2.5 ± 0.1	2.3	3.1	1.01 ± 0.05
prek-head --version	2.4 ± 0.1	2.3	2.8	1.00

prek list

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base list	9.6 ± 0.2	9.1	10.2	1.00 ± 0.03
prek-head list	9.6 ± 0.2	9.2	10.5	1.00

prek validate-config .pre-commit-config.yaml

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base validate-config .pre-commit-config.yaml	3.4 ± 0.1	3.3	3.7	1.00 ± 0.03
prek-head validate-config .pre-commit-config.yaml	3.4 ± 0.1	3.3	3.6	1.00

prek sample-config

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base sample-config	2.8 ± 0.1	2.6	2.9	1.00
prek-head sample-config	2.8 ± 0.1	2.7	2.9	1.01 ± 0.03

Cold vs Warm Runs

Comparing first run (cold) vs subsequent runs (warm cache):

prek run --all-files (cold - no cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --all-files	147.7 ± 4.3	139.1	154.6	1.00 ± 0.04
prek-head run --all-files	147.1 ± 2.8	142.3	150.8	1.00

prek run --all-files (warm - with cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --all-files	145.7 ± 3.9	139.1	151.3	1.00 ± 0.04
prek-head run --all-files	145.1 ± 4.1	139.7	152.2	1.00

Full Hook Suite

Running the builtin hook suite on the benchmark workspace:

prek run --all-files (full builtin hook suite)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --all-files	146.1 ± 4.1	139.2	155.6	1.01 ± 0.04
prek-head run --all-files	144.3 ± 3.5	138.4	151.7	1.00

Individual Hook Performance

Benchmarking each hook individually on the test repo:

prek run trailing-whitespace --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run trailing-whitespace --all-files	21.5 ± 1.0	20.4	25.2	1.01 ± 0.05
prek-head run trailing-whitespace --all-files	21.3 ± 0.5	20.5	22.4	1.00

prek run end-of-file-fixer --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run end-of-file-fixer --all-files	27.6 ± 2.2	24.5	31.8	1.03 ± 0.11
prek-head run end-of-file-fixer --all-files	26.9 ± 2.0	23.6	31.0	1.00

prek run check-json --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-json --all-files	12.8 ± 0.2	12.5	13.4	1.02 ± 0.04
prek-head run check-json --all-files	12.5 ± 0.4	11.9	13.3	1.00

prek run check-yaml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-yaml --all-files	11.8 ± 0.3	11.4	12.7	1.01 ± 0.03
prek-head run check-yaml --all-files	11.7 ± 0.2	11.4	12.1	1.00

prek run check-toml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-toml --all-files	11.9 ± 0.4	11.5	13.8	1.00 ± 0.05
prek-head run check-toml --all-files	11.8 ± 0.3	11.4	12.8	1.00

prek run check-xml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-xml --all-files	11.9 ± 0.3	11.6	12.7	1.01 ± 0.03
prek-head run check-xml --all-files	11.8 ± 0.2	11.4	12.2	1.00

prek run detect-private-key --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run detect-private-key --all-files	17.9 ± 1.2	16.1	20.7	1.02 ± 0.08
prek-head run detect-private-key --all-files	17.7 ± 0.9	15.9	19.2	1.00

prek run fix-byte-order-marker --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run fix-byte-order-marker --all-files	22.2 ± 1.6	19.8	25.1	1.00
prek-head run fix-byte-order-marker --all-files	22.7 ± 1.6	19.7	25.7	1.02 ± 0.10

Installation Performance

Benchmarking hook installation (fast path hooks skip Python setup):

prek install-hooks (cold - no cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base install-hooks	4.9 ± 0.0	4.9	4.9	1.01 ± 0.01
prek-head install-hooks	4.9 ± 0.0	4.8	4.9	1.00

prek install-hooks (warm - with cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base install-hooks	4.9 ± 0.0	4.9	4.9	1.00
prek-head install-hooks	5.0 ± 0.1	4.9	5.1	1.02 ± 0.01

File Filtering/Scoping Performance

Testing different file selection modes:

prek run (staged files only)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run	50.4 ± 0.8	49.0	51.8	1.00
prek-head run	51.8 ± 3.2	49.3	61.7	1.03 ± 0.07

prek run --files '*.json' (specific file type)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --files '*.json'	8.7 ± 0.1	8.6	8.9	1.00
prek-head run --files '*.json'	8.7 ± 0.1	8.5	8.9	1.00 ± 0.01

Workspace Discovery & Initialization

Benchmarking hook discovery and initialization overhead:

prek run --dry-run --all-files (measures init overhead)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --dry-run --all-files	10.9 ± 0.2	10.8	11.5	1.00 ± 0.02
prek-head run --dry-run --all-files	10.9 ± 0.1	10.8	11.0	1.00

Meta Hooks Performance

Benchmarking meta hooks separately:

prek run check-hooks-apply --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-hooks-apply --all-files	13.3 ± 0.1	13.1	13.4	1.06 ± 0.06
prek-head run check-hooks-apply --all-files	12.5 ± 0.7	11.9	13.7	1.00

prek run check-useless-excludes --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-useless-excludes --all-files	11.8 ± 0.1	11.6	12.0	1.00 ± 0.01
prek-head run check-useless-excludes --all-files	11.7 ± 0.1	11.6	11.9	1.00

prek run identity --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run identity --all-files	10.7 ± 0.1	10.5	11.0	1.00
prek-head run identity --all-files	10.9 ± 0.1	10.7	11.2	1.02 ± 0.02