Update script for Cursor AI IDE on linux

update_cursor.md

Cursor IDE Update Script

This Python script automates the process of downloading, installing, and updating the Cursor IDE on Linux. It checks if a new version is available, updates the AppImage, and refreshes the desktop entry and icon.

Prerequisites

• Python 3.x
• urllib and hashlib modules (standard with Python 3)

Usage

1. download the script:

wget https://gist.githubusercontent.com/MohamedElashri/b8dabacb67d56f158dd043d5718d83fd/raw/77f134ecf31fda96d4874458cc9c99ff5d15e1e1/update_cursor_linux.py

2. Run the script with sudo to allow installation into /opt and update the system-wide .desktop entry:

   sudo python3 update_cursor_linux.py

The script will check for the latest version of Cursor IDE and update it if necessary.

update_cursor_linux.py

# -*- coding: utf-8 -*-

import os
import hashlib
import urllib.request

def calculate_file_hash(file_path, hash_algo='sha256'):
    """Calculate the hash of a file."""
    hash_func = hashlib.new(hash_algo)
    with open(file_path, 'rb') as f:
        while chunk := f.read(8192):
            hash_func.update(chunk)
    return hash_func.hexdigest()

def download_file(url, target_path, headers=None):
    """Download file from URL."""
    req = urllib.request.Request(url, headers=headers or {})
    with urllib.request.urlopen(req) as response:
        file_size = int(response.info().get('Content-Length', -1))
        downloaded = 0
        block_size = 8192
        with open(target_path, 'wb') as out_file:
            while True:
                buffer = response.read(block_size)
                if not buffer:
                    break
                downloaded += len(buffer)
                out_file.write(buffer)
                if file_size > 0:
                    percent = downloaded * 100 / file_size
                    print(f"\rDownload progress: {percent:.2f}%", end='', flush=True)
    print("\nDownload complete!")

# Define the directory where the Cursor AppImage will be placed
target_dir = "/opt/cursor"

# Ensure the target directory exists
os.makedirs(target_dir, exist_ok=True)

# Cursor download URL
url = "https://downloader.cursor.sh/linux/appImage/x64"
headers = {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'}

# Path to the current AppImage (symlink)
current_appimage_path = os.path.join(target_dir, "cursor.AppImage")

# Check if the AppImage file exists and calculate its hash
if os.path.exists(current_appimage_path):
    print("Checking for Cursor updates...")
    current_hash = calculate_file_hash(current_appimage_path)
else:
    print("Installing Cursor for the first time...")
    current_hash = None

# Download the new AppImage to a temporary file
new_appimage_path = os.path.join(target_dir, "cursor_new.AppImage")
print("Downloading the latest version of Cursor...")
download_file(url, new_appimage_path, headers)

# Calculate the hash of the newly downloaded AppImage
new_hash = calculate_file_hash(new_appimage_path)

# Compare the hashes to determine if an update is needed
if current_hash == new_hash:
    print(f"You are already using the latest version. No update is necessary.")
    os.remove(new_appimage_path)  # Clean up the new download if it's the same
else:
    print(f"New version detected. Updating Cursor...")
    # Set executable permissions on the new AppImage
    os.chmod(new_appimage_path, 0o755)
    
    # Remove old AppImage if it exists
    if os.path.exists(current_appimage_path):
        os.remove(current_appimage_path)
    
    # Move the new AppImage into place
    os.rename(new_appimage_path, current_appimage_path)
    print(f"Cursor has been updated to the latest version: {current_appimage_path}")

    # Download and replace the icon in /opt
    icon_url = "https://avatars.githubusercontent.com/u/126759922?v=4"  # GitHub logo
    icon_path = "/opt/cursor/cursor.jpg"
    try:
        urllib.request.urlretrieve(icon_url, icon_path)
        print(f"Icon downloaded and saved to: {icon_path}")
    except Exception as e:
        print(f"Failed to download icon: {str(e)}")

    # Create or update the .desktop file in /usr/share/applications (system-wide)
    desktop_file_path = "/usr/share/applications/cursor.desktop"
    desktop_content = f"""[Desktop Entry]
Name=Cursor
Exec={current_appimage_path}
Terminal=false
Type=Application
Icon={icon_path}
StartupWMClass=Cursor
X-AppImage-Version=latest
Comment=Cursor is an AI-first coding environment.
MimeType=x-scheme-handler/cursor;
Categories=Utility;Development;
    """
    with open(desktop_file_path, 'w') as f:
        f.write(desktop_content)
    os.chmod(desktop_file_path, 0o755)
    print(f".desktop file updated: {desktop_file_path}")

    # Create a symbolic link to the .desktop file in the target directory (optional)
    desktop_symlink_path = os.path.join(target_dir, "cursor.desktop")
    if os.path.exists(desktop_symlink_path):
        os.remove(desktop_symlink_path)
    os.symlink(desktop_file_path, desktop_symlink_path)