Reuse remote repository sources

[j178]

Summary

• cache remote repositories in shared bare sources
• derive reusable commit checkouts for clone, update, and try-repo
• reuse deterministic dirty try-repo environments

Closes #1743
Closes #1309

[codecov]

Codecov Report

❌ Patch coverage is 22.31920% with 623 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.03%. Comparing base (bb8e1d9) to head (7e2ec72).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/prek/src/git.rs	22.41%	481 Missing ⚠️
crates/prek/src/cli/update/repository.rs	0.00%	45 Missing ⚠️
crates/prek/src/cli/try_repo.rs	0.00%	38 Missing ⚠️
crates/prek/src/cli/update/source.rs	0.00%	27 Missing ⚠️
crates/prek/src/cli/cache_gc.rs	0.00%	23 Missing ⚠️
crates/prek/src/cli/update/mod.rs	0.00%	9 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (bb8e1d9) and HEAD (7e2ec72). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (bb8e1d9)	HEAD (7e2ec72)
	15	13

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #2315       +/-   ##
===========================================
- Coverage   93.30%   37.03%   -56.27%     
===========================================
  Files         128      128               
  Lines       28392    29017      +625     
===========================================
- Hits        26491    10747    -15744     
- Misses       1901    18270    +16369     

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[prek-ci-bot]

📦 Cargo Bloat Comparison

Binary size change: +0.72% (27.7 MiB → 27.9 MiB)

Expand for cargo-bloat output

Head Branch Results

 File  .text     Size             Crate Name
 1.2%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_41_0_aes_gcm_encrypt_avx512
 1.2%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_41_0_aes_gcm_decrypt_avx512
 0.4%   0.8% 103.1KiB              prek <prek::config::Language>::run::{closure#0}::{closure#0}
 0.3%   0.7%  98.8KiB              prek <prek::config::Language>::run::{closure#0}::{closure#0}
 0.3%   0.7%  94.7KiB              prek <prek::config::Language>::install::{closure#0}
 0.2%   0.5%  66.0KiB              prek <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.2%   0.4%  49.4KiB annotate_snippets annotate_snippets::renderer::render::render
 0.2%   0.4%  48.9KiB              prek prek::run::{closure#0}
 0.2%   0.4%  48.2KiB              prek <<prek::config::Config as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.1%   0.3%  41.7KiB              prek prek::cli::run::run::run::{closure#0}
 0.1%   0.3%  35.7KiB               std core::ptr::drop_glue::<<prek::config::Language>::install::{closure#0}>
 0.1%   0.2%  32.4KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
 0.1%   0.2%  31.5KiB              prek <prek::cli::RunOptions as clap_builder::derive::Args>::augment_args
 0.1%   0.2%  29.8KiB              prek <prek::store::Store>::clone_repo_to_temp::{closure#0}
 0.1%   0.2%  29.3KiB     granit_parser <granit_parser::scanner::Scanner<granit_parser::input::str::StrInput>>::fetch_more_tokens
 0.1%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_41_0_edwards25519_scalarmuldouble_alt
 0.1%   0.2%  27.6KiB              prek <<prek::config::RemoteHook as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.1%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_41_0_edwards25519_scalarmuldouble
 0.1%   0.2%  24.9KiB               xml <xml::reader::parser::PullParser>::dispatch_token
 0.1%   0.2%  24.5KiB              prek <<prek::config::LocalHook as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
40.6%  86.1%  11.3MiB                   And 24642 smaller methods. Use -n N to show more.
47.2% 100.0%  13.2MiB                   .text section size, the file size is 27.9MiB

Base Branch Results

 File  .text     Size             Crate Name
 1.2%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_41_0_aes_gcm_encrypt_avx512
 1.2%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_41_0_aes_gcm_decrypt_avx512
 0.3%   0.7%  98.8KiB              prek <prek::config::Language>::run::{closure#0}::{closure#0}
 0.3%   0.7%  98.8KiB              prek <prek::config::Language>::run::{closure#0}::{closure#0}
 0.3%   0.7%  94.7KiB              prek <prek::config::Language>::install::{closure#0}
 0.2%   0.5%  66.0KiB              prek <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.2%   0.4%  49.4KiB annotate_snippets annotate_snippets::renderer::render::render
 0.2%   0.4%  48.6KiB              prek <<prek::config::Config as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.2%   0.4%  48.1KiB              prek prek::run::{closure#0}
 0.1%   0.3%  42.1KiB              prek prek::cli::run::run::run::{closure#0}
 0.1%   0.3%  35.7KiB               std core::ptr::drop_glue::<<prek::config::Language>::install::{closure#0}>
 0.1%   0.2%  32.4KiB              prek prek::archive::unpack::<fs_err::tokio::file::File, &std::path::PathBuf>::{closure#0}
 0.1%   0.2%  31.5KiB              prek <prek::cli::RunOptions as clap_builder::derive::Args>::augment_args
 0.1%   0.2%  29.3KiB     granit_parser <granit_parser::scanner::Scanner<granit_parser::input::str::StrInput>>::fetch_more_tokens
 0.1%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_41_0_edwards25519_scalarmuldouble_alt
 0.1%   0.2%  27.6KiB              prek <<prek::config::RemoteHook as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
 0.1%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_41_0_edwards25519_scalarmuldouble
 0.1%   0.2%  25.5KiB              prek prek::cli::try_repo::try_repo::{closure#0}
 0.1%   0.2%  24.9KiB               xml <xml::reader::parser::PullParser>::dispatch_token
 0.1%   0.2%  24.5KiB              prek <<prek::config::LocalHook as serde_core::de::Deserialize>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map::<<serde_saphyr::de::deserializer::YamlDeserializer as serde_core::de::Deserializer>::deserialize_map::MA>
40.4%  86.0%  11.2MiB                   And 24576 smaller methods. Use -n N to show more.
47.0% 100.0%  13.0MiB                   .text section size, the file size is 27.7MiB

[prek-ci-bot]

⚡️ Hyperfine Benchmarks

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

Environment

• OS: Linux 6.17.0-1018-azure
• CPU: 4 cores
• prek version: prek 0.4.9+11 (c2d4b48 2026-07-12)
• Rust version: rustc 1.97.0 (2d8144b78 2026-07-07)
• 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	2.2 ± 0.1	2.0	2.8	1.01 ± 0.08
prek-head --version	2.1 ± 0.1	2.0	3.1	1.00

prek list

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base list	9.3 ± 0.3	8.9	11.5	1.00
prek-head list	9.7 ± 0.2	9.1	10.2	1.05 ± 0.04

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

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base validate-config .pre-commit-config.yaml	3.1 ± 0.0	3.0	3.2	1.00
prek-head validate-config .pre-commit-config.yaml	3.2 ± 0.1	3.0	3.5	1.01 ± 0.03

prek sample-config

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base sample-config	2.4 ± 0.0	2.3	2.6	1.00
prek-head sample-config	2.5 ± 0.0	2.4	2.5	1.01 ± 0.02

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	78.2 ± 2.0	73.8	80.9	1.01 ± 0.03
prek-head run --all-files	77.4 ± 1.1	75.7	79.4	1.00

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

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --all-files	76.5 ± 2.1	73.4	80.3	1.00
prek-head run --all-files	77.0 ± 2.2	72.0	79.7	1.01 ± 0.04

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	78.6 ± 2.6	74.5	85.4	1.00
prek-head run --all-files	79.4 ± 3.3	73.5	93.5	1.01 ± 0.05

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	20.3 ± 0.6	19.5	21.9	1.00
prek-head run trailing-whitespace --all-files	20.6 ± 0.5	19.7	21.7	1.01 ± 0.04

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	26.7 ± 2.0	24.3	30.2	1.02 ± 0.11
prek-head run end-of-file-fixer --all-files	26.2 ± 2.2	23.6	30.5	1.00

prek run check-json --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-json --all-files	7.6 ± 0.3	7.1	8.2	1.00
prek-head run check-json --all-files	7.6 ± 0.2	7.1	8.0	1.00 ± 0.05

prek run check-yaml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-yaml --all-files	7.4 ± 0.1	7.2	7.6	1.00
prek-head run check-yaml --all-files	7.5 ± 0.1	7.2	7.7	1.01 ± 0.02

prek run check-toml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-toml --all-files	7.6 ± 0.3	7.2	8.4	1.00 ± 0.05
prek-head run check-toml --all-files	7.6 ± 0.3	7.1	8.0	1.00

prek run check-xml --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run check-xml --all-files	7.4 ± 0.4	7.1	8.6	1.00
prek-head run check-xml --all-files	7.5 ± 0.3	7.1	8.4	1.01 ± 0.07

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

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run detect-private-key --all-files	13.5 ± 1.0	11.8	16.3	1.00
prek-head run detect-private-key --all-files	14.2 ± 1.2	12.1	16.7	1.05 ± 0.12

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	18.1 ± 0.8	17.1	20.6	1.00
prek-head run fix-byte-order-marker --all-files	18.4 ± 0.7	17.5	19.9	1.02 ± 0.06

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	4.4 ± 0.1	4.4	4.5	1.00
prek-head install-hooks	4.5 ± 0.0	4.4	4.5	1.01 ± 0.02

prek install-hooks (warm - with cache)

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base install-hooks	4.4 ± 0.0	4.4	4.4	1.00
prek-head install-hooks	4.4 ± 0.0	4.4	4.5	1.01 ± 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	37.0 ± 0.9	35.7	39.8	1.00
prek-head run	37.9 ± 2.4	36.1	45.1	1.03 ± 0.07

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

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run --files '*.json'	7.9 ± 0.1	7.7	8.1	1.01 ± 0.02
prek-head run --files '*.json'	7.8 ± 0.1	7.7	8.0	1.00

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	6.7 ± 0.1	6.5	6.8	1.01 ± 0.02
prek-head run --dry-run --all-files	6.6 ± 0.1	6.5	6.9	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	12.4 ± 1.3	11.2	15.1	1.08 ± 0.12
prek-head run check-hooks-apply --all-files	11.4 ± 0.2	11.2	11.9	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	11.5 ± 0.3	11.2	12.4	1.06 ± 0.05
prek-head run check-useless-excludes --all-files	10.8 ± 0.4	10.3	11.4	1.00

prek run identity --all-files

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
prek-base run identity --all-files	9.7 ± 0.1	9.6	10.0	1.00
prek-head run identity --all-files	9.9 ± 0.5	9.7	11.4	1.02 ± 0.05