Git — Hooks

What are Hooks?

Scripts that run automatically on Git events.

Hook Locations

.git/hooks/
├── pre-commit
├── commit-msg
├── pre-push
└── post-merge

Common Hooks

Hook	When It Runs
pre-commit	Before commit
commit-msg	After commit message
pre-push	Before push
post-merge	After merge

Pre-Commit Hook

#!/bin/sh
# .git/hooks/pre-commit

# Run linter
npm run lint

# Run tests
npm test

Commit Message Hook

#!/bin/sh
# .git/hooks/commit-msg

# Check message length
if [ $(cat $1 | wc -l) -lt 10 ]; then
    echo "Commit message too short"
    exit 1
fi

Make Hook Executable

chmod +x .git/hooks/pre-commit

Disable Hook

# Temporarily skip hooks
git commit --no-verify -m "Skip hooks"

Mini Practice

1. Create a pre-commit hook
2. Add validation
3. Make hook executable
4. Test the hook

Up Next

Continue with GitHub — GitHub platform.