Support Julia language

[fllesser]

resolve #1446

[codecov]

Codecov Report

❌ Patch coverage is 98.21429% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.02%. Comparing base (1808e0f) to head (6192892).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/prek/src/languages/julia.rs	98.13%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1519      +/-   ##
==========================================
+ Coverage   91.98%   92.02%   +0.03%     
==========================================
  Files          88       89       +1     
  Lines       18374    18500     +126     
==========================================
+ Hits        16901    17024     +123     
- Misses       1473     1476       +3     

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[prek-ci-bot]

📦 Cargo Bloat Comparison

Binary size change: +0.00% (22.6 MiB → 22.6 MiB)

Expand for cargo-bloat output

Head 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%   0.8% 70.3KiB            prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.7% 65.1KiB            prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.2%   0.5% 50.8KiB            prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.5% 43.9KiB            prek prek::run::{{closure}}
 0.2%   0.5% 43.4KiB            prek prek::identify::by_extension::{{closure}}
 0.2%   0.4% 41.5KiB            prek prek::cli::run::run::run::{{closure}}
 0.1%   0.3% 32.0KiB           prek? <prek::cli::RunArgs as clap_builder::derive::Args>::augment_args
 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% 19.6KiB            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% 19.3KiB            prek <prek::languages::ruby::ruby::Ruby as prek::languages::LanguageImpl>::install::{{closure}}
 0.1%   0.2% 19.1KiB            prek prek::cli::run::filter::collect_files_from_args::{{closure}}
 0.1%   0.2% 18.6KiB            ring ring_core_0_17_14__x25519_ge_frombytes_vartime
 0.1%   0.2% 18.1KiB       [Unknown] fe_loose_invert
 0.1%   0.2% 18.1KiB      hyper_util hyper_util::client::legacy::client::Client<C,B>::send_request::{{closure}}
36.8%  91.3%  8.3MiB                 And 20083 smaller methods. Use -n N to show more.
40.3% 100.0%  9.1MiB                 .text section size, the file size is 22.6MiB

Base Branch Results

 File  .text    Size           Crate Name
 0.3%   0.8% 72.1KiB           prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.3%   0.7% 66.3KiB            prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.7% 61.2KiB            prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.2%   0.5% 46.0KiB            prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.5% 43.4KiB            prek prek::identify::by_extension::{{closure}}
 0.2%   0.5% 43.2KiB            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%   0.2% 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% 20.6KiB            prek prek::archive::unzip::{{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::cli::run::filter::collect_files_from_args::{{closure}}
 0.1%   0.2% 19.3KiB            prek <prek::languages::ruby::ruby::Ruby as prek::languages::LanguageImpl>::install::{{closure}}
 0.1%   0.2% 19.1KiB            prek prek::cli::run::filter::collect_files_from_args::{{closure}}
 0.1%   0.2% 19.0KiB             std core::ptr::drop_in_place<prek::languages::<impl prek::config::Language>::install::{{closure}}>
 0.1%   0.2% 18.6KiB            ring ring_core_0_17_14__x25519_ge_frombytes_vartime
 0.1%   0.2% 18.1KiB       [Unknown] fe_loose_invert
 0.1%   0.2% 18.1KiB      hyper_util hyper_util::client::legacy::client::Client<C,B>::send_request::{{closure}}
36.8%  91.4%  8.3MiB                 And 20038 smaller methods. Use -n N to show more.
40.3% 100.0%  9.1MiB                 .text section size, the file size is 22.6MiB

[fllesser]

I haven't added the remote hook test yet. Once you've forked the repository (https://github.com/fllesser/julia-hooks), I will push the test cases @j178

[j178]

Forked https://github.com/prek-test-repos/julia-hooks! Also invited you as a member to prek-test-repos.

[Copilot]

Pull request overview

This PR adds support for the Julia language to prek, implementing a new language handler that allows hooks written in Julia to be installed and executed. The implementation follows established patterns from other language implementations like Haskell and Lua.

Changes:

• Added Julia language support with isolated environment management using Julia's Pkg package manager
• Integrated Julia throughout the codebase including schema, configuration, documentation, tests, and CI/CD
• Fixed alphabetical ordering of language enums (moved Pygrep before Swift)

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
prek.schema.json	Added Julia to language schema and default_language_version in alphabetical order
docs/languages.md	Added Julia documentation describing installation, features, and limitations
docs/cli.md	Updated CLI documentation to include Julia in language list
crates/prek/src/languages/julia.rs	New Julia language implementation with install, health check, and run methods
crates/prek/src/languages/mod.rs	Integrated Julia language handler into the languages module
crates/prek/src/config.rs	Added Julia to Language enum with proper alphabetical ordering
crates/prek/tests/languages/julia.rs	Comprehensive test suite for Julia hooks covering local, remote, script file, and dependency scenarios
crates/prek/tests/languages/main.rs	Added Julia test module
.github/workflows/ci.yml	Added Julia installation step and version configuration for CI
.config/nextest.toml	Added Julia test profile configuration

[j178]

Thanks!