Git Hooks
FreeAutomate and enforce policies in your Git workflow with custom hook scripts
FreeFree tier
About Git Hooks
Git Hooks are a built-in feature of Git that allow developers to automate tasks and enforce policies throughout the Git workflow. By writing custom scripts that Git executes automatically when certain events occur (such as before or after a commit, push, or merge), developers can streamline their workflow, ensure code quality, and enforce project-specific policies. This guide covers the various types of Git Hooks (e.g., pre-commit, pre-push, post-merge), how to set them up by placing executable scripts in the .git/hooks directory, and how to share hooks across a team using the core.hooksPath configuration introduced in Git 2.9.
Key Features
Executes custom scripts at key Git events (commit, push, merge, etc.)
Supports a wide range of hooks: pre-commit, pre-push, post-commit, post-merge, pre-receive, and more
Can be used for code linting, formatting checks, running tests, and enforcing commit message standards
Hooks reside in .git/hooks directory (not tracked by Git by default)
Sharing hooks via core.hooksPath configuration (Git 2.9+)
Example use cases: commit message validation, preventing pushes to protected branches, sending notifications
Pros & Cons
Pros
- Built into Git, no external dependencies required
- Highly customizable – scripts can be written in any language
- Enhances team collaboration by enforcing project policies automatically
- Prevents bad commits or pushes from being made
- Can automate repetitive tasks like environment setup or documentation generation
Cons
- By default, hooks are not shared with team members (requires manual setup or core.hooksPath)
- Writing effective hooks requires scripting knowledge (e.g., shell, Python)
- Poorly written hooks can slow down Git operations if they are slow or resource-intensive
- Not a replacement for server-side CI/CD (only client-side enforcement)
Best For
Enforcing code formatting and linting before commitsRunning test suites before pushing code to remotePreventing accidental pushes to production or protected branchesAutomatically updating dependencies after a mergeSending email or SMS notifications to team members after a commitValidating commit message format for consistent project history
FAQ
What are Git Hooks?
Git Hooks are custom scripts that Git executes automatically when certain events occur in the repository, such as before or after a commit, push, or merge.
How do I use Git Hooks?
Create executable scripts in the .git/hooks directory of your repository, named after the hook event (e.g., pre-commit, pre-push). Make the script executable with chmod +x.
How can I share Git Hooks with my team?
Create a versioned directory (e.g., .githooks), place hook scripts there, commit them, and configure Git to use that directory with 'git config core.hooksPath .githooks'. This was introduced in Git 2.9.
What are some common Git Hook examples?
Examples include checking commit messages for spelling errors (pre-commit), enforcing coding standards (pre-receive), emailing team members of new commits (post-commit), and pushing code to production (post-receive).