Add `prek util yaml-to-toml` to convert `.pre-commit-config.yaml` to `prek.toml` by j178 · Pull Request #1584 · j178/prek

j178 · 2026-02-06T07:47:26Z

No description provided.

codecov · 2026-02-06T07:49:02Z

Codecov Report

❌ Patch coverage is 93.75000% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.65%. Comparing base (2314871) to head (50c941d).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/prek/src/cli/yaml_to_toml.rs	93.61%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1584      +/-   ##
==========================================
+ Coverage   91.58%   91.65%   +0.07%     
==========================================
  Files          92       93       +1     
  Lines       18136    18280     +144     
==========================================
+ Hits        16609    16755     +146     
+ Misses       1527     1525       -2

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prek-ci-bot · 2026-02-06T07:50:36Z

📦 Cargo Bloat Comparison

Binary size change: +0.42% (23.6 MiB → 23.7 MiB)

Expand for cargo-bloat output

Head Branch Results

 File  .text    Size             Crate Name
 0.3%   0.8% 81.8KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.3%   0.7% 71.1KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 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
 0.2%   0.5% 50.5KiB              prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.4% 41.4KiB              prek prek::cli::run::run::run::{{closure}}
 0.2%   0.4% 38.4KiB              prek prek::run::{{closure}}
 0.1%   0.3% 31.3KiB             prek? <prek::cli::RunArgs as clap_builder::derive::Args>::augment_args
 0.1%   0.3% 28.4KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.3% 28.3KiB              prek prek::identify::by_extension::{{closure}}
 0.1%   0.2% 24.8KiB             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% 22.6KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2% 22.1KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2% 22.1KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2% 21.2KiB      clap_builder clap_builder::parser::parser::Parser::get_matches_with
 0.1%   0.2% 20.0KiB   cargo_metadata? <cargo_metadata::_::<impl serde_core::de::Deserialize for cargo_metadata::Package>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map
 0.1%   0.2% 19.5KiB              prek prek::archive::unzip::{{closure}}
 0.1%   0.2% 19.5KiB              prek prek::cli::run::filter::collect_files_from_args::{{closure}}
 0.1%   0.2% 19.3KiB               std core::ptr::drop_in_place<prek::languages::<impl prek::config::Language>::install::{{closure}}>
 0.1%   0.2% 19.2KiB              prek <prek::languages::ruby::ruby::Ruby as prek::languages::LanguageImpl>::install::{{closure}}
38.4%  91.6%  9.1MiB                   And 20905 smaller methods. Use -n N to show more.
41.9% 100.0%  9.9MiB                   .text section size, the file size is 23.7MiB

Base Branch Results

 File  .text    Size             Crate Name
 0.3%   0.7% 73.5KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.3%   0.7% 71.3KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 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
 0.2%   0.5% 50.5KiB              prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.4% 41.5KiB              prek prek::cli::run::run::run::{{closure}}
 0.2%   0.4% 38.1KiB              prek prek::run::{{closure}}
 0.1%   0.3% 32.0KiB             prek? <prek::cli::RunArgs as clap_builder::derive::Args>::augment_args
 0.1%   0.3% 28.4KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.3% 28.3KiB              prek prek::identify::by_extension::{{closure}}
 0.1%   0.2% 24.9KiB             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% 22.6KiB      serde_saphyr saphyr_parser_bw::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2% 22.2KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2% 21.2KiB      clap_builder clap_builder::parser::parser::Parser::get_matches_with
 0.1%   0.2% 20.6KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2% 20.0KiB   cargo_metadata? <cargo_metadata::_::<impl serde_core::de::Deserialize for cargo_metadata::Package>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map
 0.1%   0.2% 19.5KiB              prek prek::archive::unzip::{{closure}}
 0.1%   0.2% 19.5KiB              prek prek::cli::run::filter::collect_files_from_args::{{closure}}
 0.1%   0.2% 19.3KiB               std core::ptr::drop_in_place<prek::languages::<impl prek::config::Language>::install::{{closure}}>
 0.1%   0.2% 19.2KiB              prek <prek::languages::ruby::ruby::Ruby as prek::languages::LanguageImpl>::install::{{closure}}
38.3%  91.6%  9.1MiB                   And 20911 smaller methods. Use -n N to show more.
41.9% 100.0%  9.9MiB                   .text section size, the file size is 23.6MiB

Copilot

Pull request overview

This PR adds a new prek util yaml-to-toml command to convert .pre-commit-config.yaml files to the native prek.toml format. The conversion reads YAML configuration files, validates them, and outputs properly formatted TOML files with support for custom output paths and force-overwrite functionality.

Changes:

Added new CLI command prek util yaml-to-toml with input file argument, --output and --force options
Implemented YAML-to-TOML conversion logic using serde_saphyr for YAML parsing and toml_edit for TOML generation
Added comprehensive integration tests covering basic conversion, overwrite protection, and invalid config handling
Updated documentation to reference the new conversion utility

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
`crates/prek/src/cli/yaml_to_toml.rs`	New file implementing the yaml-to-toml conversion command with file I/O, validation, and TOML generation logic
`crates/prek/src/cli/mod.rs`	Added YamlToTomlArgs struct and YamlToToml variant to UtilCommand enum, plus Debug derive on ExitStatus
`crates/prek/src/main.rs`	Integrated the yaml-to-toml command handler into the main command dispatcher
`crates/prek/src/config.rs`	Added accessor methods (patterns, regex_pattern, glob_patterns) to FilePattern types
`crates/prek/tests/yaml_to_toml.rs`	New integration test file with tests for default output, overwrite protection, and invalid config handling
`docs/configuration.md`	Added tip box recommending the new yaml-to-toml command for converting from YAML to TOML format
`docs/cli.md`	Auto-generated documentation for the new yaml-to-toml command with all options and arguments
`crates/prek/Cargo.toml`	Added "display" feature to toml dependency for better error formatting
`Cargo.toml`	Workspace-level addition of "display" feature to toml dependency

crates/prek/src/cli/yaml_to_toml.rs

crates/prek/tests/yaml_to_toml.rs

…`prek.toml`

j178 added 4 commits February 6, 2026 12:14

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Copilot AI review requested due to automatic review settings February 6, 2026 07:47

j178 added the enhancement New feature or request label Feb 6, 2026

Copilot started reviewing on behalf of j178 February 6, 2026 07:47 View session

j178 mentioned this pull request Feb 6, 2026

Tracking issue for prek.toml #1583

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j178 changed the title ~~yaml to toml~~ Add prek util yaml-to-toml to convert .pre-commit-config.yaml to prek.toml Feb 6, 2026

j178 force-pushed the yaml-to-toml branch from 088da21 to 57cf200 Compare February 6, 2026 07:50

j178 force-pushed the yaml-to-toml branch from 57cf200 to ad11cd9 Compare February 6, 2026 07:51

Copilot AI reviewed Feb 6, 2026

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Add prek util yaml-to-toml to convert .pre-commit-config.yaml to …

50c941d

…`prek.toml`

j178 force-pushed the yaml-to-toml branch from ad11cd9 to 50c941d Compare February 6, 2026 08:04

j178 merged commit 3fa9187 into master Feb 6, 2026
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j178 deleted the yaml-to-toml branch February 6, 2026 08:11

BrewTestBot mentioned this pull request Feb 6, 2026

prek 0.3.2 Homebrew/homebrew-core#266179

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Add `prek util yaml-to-toml` to convert `.pre-commit-config.yaml` to `prek.toml`#1584

Add `prek util yaml-to-toml` to convert `.pre-commit-config.yaml` to `prek.toml`#1584
j178 merged 5 commits intomasterfrom
yaml-to-toml

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