Bits of .NET

🔧 Git Hooks = Automation Power

Manual tasks are repetitive. Git hooks automate at Git events. Pre-commit, post-merge, pre-push — automate your workflow.

📝 Available Hooks

# Client-side hooks
pre-commit     # Before commit
prepare-commit-msg # After commit message creation
commit-msg     # Before commit message final
post-commit    # After commit
pre-rebase     # Before rebase
post-checkout  # After checkout
post-merge     # After merge
pre-push       # Before push

# Server-side hooks
pre-receive    # Before receiving push
update         # Per branch update
post-receive   # After receiving push

# Hook locations
.git/hooks/
- pre-commit.sample
- commit-msg.sample
- etc.

# Enable hooks
# Remove .sample extension
mv .git/hooks/pre-commit.sample .git/hooks/pre-commit

🎯 Pre-commit Hook Examples

# .git/hooks/pre-commit (bash)
#!/bin/sh

# Run linter
echo "Running linter..."
npm run lint
if [ $? -ne 0 ]; then
    echo "Linting failed. Fix errors before committing."
    exit 1
fi

# Run tests
echo "Running tests..."
npm test
if [ $? -ne 0 ]; then
    echo "Tests failed. Fix errors before committing."
    exit 1
fi

# Check for debugging code
if grep -n "console.log(" `git diff --cached --name-only`; then
    echo "Error: Remove console.log statements before committing"
    exit 1
fi

echo "Pre-commit checks passed!"
exit 0

# Pre-commit with Node.js
#!/usr/bin/env node
const { execSync } = require('child_process');

try {
    // Run lint-staged
    execSync('npx lint-staged', { stdio: 'inherit' });
    
    // Run unit tests
    execSync('npm test -- --coverage', { stdio: 'inherit' });
    
    console.log('✅ All checks passed!');
} catch (error) {
    console.error('❌ Pre-commit checks failed!');
    process.exit(1);
}

💡 Hook Best Practices

• Keep hooks fast (performance)
• Use –no-verify to skip (if needed)
• Share hooks via scripts
• Test hooks carefully
• Use Husky for easier management