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Add prek identify subcommand#1554

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j178 merged 2 commits intoj178:masterfrom
fatelei:issue-1550
Feb 4, 2026
Merged

Add prek identify subcommand#1554
j178 merged 2 commits intoj178:masterfrom
fatelei:issue-1550

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@fatelei fatelei commented Feb 4, 2026 •
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fix #1550

cargo run -- identify .gitignore Cargo.lock README.md .github/

output

.gitignore                                                                        
   Tags: file, non-executable, text, gitignore

Cargo.lock
   Tags: file, non-executable, text, toml, cargo-lock

README.md
  Tags: file, non-executable, text, plain-text, markdown

.github/
  Tags: directory

@fatelei fatelei requested a review from j178 as a code owner February 4, 2026 02:23
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codecov bot commented Feb 4, 2026 •
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Codecov Report

❌ Patch coverage is 94.59459% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.56%. Comparing base (5c64e47) to head (b400aa7).
⚠️ Report is 1 commits behind head on master.

Files with missing lines Patch % Lines
crates/prek/src/cli/identify.rs 94.11% 2 Missing ⚠️
Additional details and impacted files 
@@           Coverage Diff           @@
##           master    #1554   +/-   ##
=======================================
  Coverage   91.56%   91.56%           
=======================================
  Files          91       92    +1     
  Lines       17875    17912   +37     
=======================================
+ Hits        16368    16402   +34     
- Misses       1507     1510    +3

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prek-ci-bot bot commented Feb 4, 2026 •
edited
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📦 Cargo Bloat Comparison

Binary size change: -0.43% (23.3 MiB → 23.2 MiB)

Expand for cargo-bloat output

Head Branch Results

 File  .text    Size             Crate Name
 0.3%   0.8% 75.6KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.3%   0.7% 72.1KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.7% 65.7KiB              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% 50.8KiB              prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.4% 43.4KiB              prek prek::identify::by_extension::{{closure}}
 0.2%   0.4% 43.4KiB              prek prek::run::{{closure}}
 0.2%   0.4% 41.7KiB              prek prek::cli::run::run::run::{{closure}}
 0.1%   0.3% 31.8KiB             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% 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% 22.1KiB              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% 19.7KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2% 19.5KiB              prek prek::archive::unzip::{{closure}}
 0.1%   0.2% 19.4KiB              prek prek::cli::run::filter::collect_files_from_args::{{closure}}
 0.1%   0.2% 19.4KiB              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}}>
38.0%  91.3%  8.8MiB                   And 20404 smaller methods. Use -n N to show more.
41.6% 100.0%  9.7MiB                   .text section size, the file size is 23.2MiB

Base Branch Results

 File  .text    Size             Crate Name
 0.3%   0.8% 77.0KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.3%   0.7% 72.1KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.7% 65.7KiB              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% 50.8KiB              prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.4% 43.4KiB              prek prek::identify::by_extension::{{closure}}
 0.2%   0.4% 43.1KiB              prek prek::run::{{closure}}
 0.2%   0.4% 41.7KiB              prek prek::cli::run::run::run::{{closure}}
 0.1%   0.3% 31.1KiB             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%   0.2% 24.2KiB             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% 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% 19.7KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2% 19.4KiB              prek prek::cli::run::filter::collect_files_from_args::{{closure}}
 0.1%   0.2% 19.4KiB              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% 19.3KiB              prek prek::archive::unzip::{{closure}}
37.9%  91.2%  8.8MiB                   And 20468 smaller methods. Use -n N to show more.
41.5% 100.0%  9.7MiB                   .text section size, the file size is 23.3MiB

@j178 j178 changed the title feat: add prek identify command Add prek identify subcommand Feb 4, 2026
@j178 j178 added the enhancement New feature or request label Feb 4, 2026
j178
j178 previously approved these changes Feb 4, 2026
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Thank you, I made some tweaks, hope you won't mind!

@j178 j178 force-pushed the issue-1550 branch 2 times, most recently from 7bfbbb7 to 9b59b8f Compare February 4, 2026 05:42
@j178 j178 merged commit df0adba into j178:master Feb 4, 2026
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@j178 j178 mentioned this pull request Feb 4, 2026
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@BrewTestBot BrewTestBot mentioned this pull request Feb 6, 2026
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Add prek identify to show identify tags of a file

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