Detect install source for actionable upgrade hints

[shaanmajid]

Detects how prek was installed (Homebrew or Cargo) by inspecting the executable path, then provides actionable upgrade hints when:

• prek self update fails because prek wasn't installed via standalone scripts
• minimum_prek_version isn't satisfied

Based largely on the approach uv implemented in astral-sh/uv#16838.

Detection heuristics:

• Homebrew: path contains /Cellar/prek/
• Cargo: path contains /.cargo/bin/

Example output:

error: prek was installed via an external package manager and cannot self-update.
hint: You installed prek via Homebrew. To update, run brew update && brew upgrade prek

See discussion in #1490 for further context.

[codecov]

Codecov Report

❌ Patch coverage is 71.79487% with 22 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.57%. Comparing base (f8df4e7) to head (e3c1be1).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/prek/src/main.rs	0.00%	12 Missing ⚠️
crates/prek/src/install_source.rs	83.87%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1540      +/-   ##
==========================================
- Coverage   91.65%   91.57%   -0.09%     
==========================================
  Files          90       91       +1     
  Lines       17813    17892      +79     
==========================================
+ Hits        16326    16384      +58     
- Misses       1487     1508      +21     

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[prek-ci-bot]

📦 Cargo Bloat Comparison

Binary size change: +0.00% (23.2 MiB → 23.2 MiB)

Expand for cargo-bloat output

Head Branch Results

 File  .text    Size             Crate Name
 0.3%   0.7% 72.1KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.7% 71.6KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 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% 43.9KiB              prek prek::run::{{closure}}
 0.2%   0.4% 43.4KiB              prek prek::identify::by_extension::{{closure}}
 0.2%   0.4% 41.7KiB              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%   0.3% 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% 19.9KiB              prek prek::archive::unzip::{{closure}}
 0.1%   0.2% 19.7KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{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}}
37.8%  91.2%  8.8MiB                   And 20435 smaller methods. Use -n N to show more.
41.5% 100.0%  9.6MiB                   .text section size, the file size is 23.2MiB

Base Branch Results

 File  .text    Size             Crate Name
 0.3%   0.8% 74.5KiB             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%   0.7% 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% 41.6KiB              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%   0.3% 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% 19.5KiB              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}}
37.8%  91.2%  8.8MiB                   And 20451 smaller methods. Use -n N to show more.
41.5% 100.0%  9.6MiB                   .text section size, the file size is 23.2MiB

[j178]

Thanks!