prefligit

pre-commit is a framework to run hooks written in many languages, and it manages the language toolchain and dependencies for running the hooks.

prefligit is a reimagined version of pre-commit, built in Rust. It is designed to be a faster, dependency-free and drop-in alternative for it, while also providing some additional long-requested features.

[!WARNING] This project is still in early stage of development, some features are still not implemented. It is not production-ready yet, but feel free to try it out and provide feedback.

Current supported languages are python, node, go, docker, docker-image, system, script and fail.

Features

• 🚀 A single binary with no dependencies, does not require Python or any other runtime.
• ⚡ About 10x faster than pre-commit and uses only a third of disk space.
• 🔄 Fully compatible with the original pre-commit configurations and hooks.
• 🐍 Integration with uv for managing Python virtual environments and dependencies.
• 🛠️ Improved toolchain installations for Python, Node.js, Go, Rust and Ruby, shared between hooks.
• 📦 Built-in implementation of some common hooks.
• 🏗️ (TODO) Built-in support for monorepos.

How to migrate

prefligit is designed as a drop-in replacement:

• Install prefligit.
• Replace pre-commit with prefligit in your commands
• Your existing .pre-commit-config.yaml works unchanged

$ prefligit run
trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
typos....................................................................Passed
cargo fmt................................................................Passed
cargo clippy.............................................................Passed

For configuring .pre-commit-config.yaml and writing hooks, you can refer to the pre-commit documentation as prefligit is fully compatible with it.

Why prefligit?

prefligit is way faster

• It is about 10x faster than pre-commit and uses only a third of disk space.
• It redesigned how hook environments and toolchains are managed, they are all shared between hooks, which reduces the disk space usage and speeds up the installation process.
• Repositories are cloned in parallel, and hooks are installed in parallel if their dependencies are disjoint.
• It uses uv for creating Python virtualenvs and installing dependencies, which is known for its speed and efficiency.
• It implements some common hooks in Rust, built in prefligit, which are faster than their Python counterparts.

prefligit provides a better user experience

• No need to install Python or any other runtime, just download a single binary.
• No hassle with your Python version or virtual environments, prefligit automatically installs the required Python version and creates a virtual environment for you.
• (TODO): Built-in support for workspaces (or monorepos), each sub-project can have its own .pre-commit-config.yaml file.
• prefligit run has some improvements over pre-commit run, such as:
  • prefligit run --directory <dir> runs hooks for files in the specified directory, no need to use git ls-files -- <dir> | xargs pre-commit run --files anymore.
  • prefligit run --last-commit runs hooks for files changed in the last commit.
• (TODO): prefligit provides shell completions for prefligit run <hook_id> command, so you can easily find the available hooks.

Installation

# On Linux and macOS
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/j178/prefligit/releases/download/v0.0.22/prefligit-installer.sh | sh

# On Windows
powershell -ExecutionPolicy ByPass -c "irm https://github.com/j178/prefligit/releases/download/v0.0.22/prefligit-installer.ps1 | iex"

pip install prefligit

# or

uv tool install prefligit

# or

pipx install prefligit

brew install prefligit

cargo install --locked --git https://github.com/j178/prefligit

If installed via the standalone installer, prefligit can update itself to the latest version:

$ prefligit self update

Acknowledgements

This project is heavily inspired by the original pre-commit tool, and it wouldn't be possible without the hard work of the maintainers and contributors of that project.

And a special thanks to the Astral team for their remarkable projects, particularly uv, from which I've learned a lot on how to write efficient and idiomatic Rust code.