Watch and pull script that monitors git repository for changes and opens localhost:3000 when updates are detected

watch_and_pull.sh

#!/bin/bash

# Function to open localhost:3000
open_localhost() {
    echo "Changes detected! Opening localhost:3000..."
    if command -v open >/dev/null 2>&1; then
        open http://localhost:3000
    elif command -v xdg-open >/dev/null 2>&1; then
        xdg-open http://localhost:3000
    else
        echo "Cannot open browser automatically. Please visit http://localhost:3000"
    fi
}

# Get initial commit hash
last_commit=$(git rev-parse HEAD)

echo "Starting git pull --rebase watcher (every 15 seconds)..."
echo "Initial commit: $last_commit"

while true; do
    echo "Checking for updates..."
    
    # Perform git pull --rebase
    git pull --rebase
    
    # Get current commit hash
    current_commit=$(git rev-parse HEAD)
    
    # Check if commit changed
    if [ "$current_commit" != "$last_commit" ]; then
        echo "Repository updated from $last_commit to $current_commit"
        open_localhost
        last_commit=$current_commit
    else
        echo "No changes detected"
    fi
    
    # Wait 15 seconds
    sleep 15
done

Watch and Pull Script

A bash script that continuously monitors a git repository for changes and automatically opens localhost:3000 when updates are detected.

Features

• Polls git repository every 15 seconds for new commits
• Performs to fetch latest changes
• Cross-platform browser opening (macOS, Linux)
• Graceful fallback when browser can't be opened automatically

Usage

Make the script executable and run:

chmod +x watch_and_pull.sh
./watch_and_pull.sh

How it works

1. Records the initial git commit hash
2. Every 15 seconds:
   • Runs git pull --rebase
   • Checks if the commit hash changed
   • Opens http://localhost:3000 if changes detected
   • Waits 15 seconds before next check

Perfect for development workflows where you want to automatically view changes when collaborators push updates.