app.py

import subprocess
import time
import sys
import os

def run_bg(command):
    # Run command in background and ignore output to keep logs clean
    return subprocess.Popen(
        command, 
        shell=True,
        env={**os.environ, "DISPLAY": ":1"}
    )

def main():
    print(">>> Initializing Environment...")

    # 1. Configure KasmVNC (Disable SSL for HF Spaces, Set Port)
    # We write the config file dynamically
    vnc_dir = os.path.join(os.environ['HOME'], '.vnc')
    os.makedirs(vnc_dir, exist_ok=True)
    
    yaml_config = """
network:
  protocol: http
  interface: 0.0.0.0
  websocket_port: 7860
  ssl:
    require_ssl: false
"""
    with open(os.path.join(vnc_dir, 'kasmvnc.yaml'), 'w') as f:
        f.write(yaml_config)

    # 2. Start KasmVNC
    # This acts as the X Server (Display :1) AND the Web Server (Port 7860)
    print(">>> Starting KasmVNC on Port 7860...")
    run_bg("vncserver -select-de matchbox -geometry 1280x720 -depth 24 -http_port 7860 -websocket_port 7860 -SecurityTypes None")
    
    # Wait for X server to be ready
    time.sleep(3)

    # 3. Start Window Manager (Matchbox)
    print(">>> Starting Window Manager...")
    run_bg("matchbox-window-manager -use_titlebar no")

    # 4. Start Brave Browser
    print(">>> Starting Brave Browser...")
    brave_cmd = (
        "brave-browser "
        "--start-maximized "
        "--user-data-dir=/home/user/brave-data "
        "--no-sandbox " 
        "--disable-dev-shm-usage "
        "--disable-gpu-shader-disk-cache "
        "--test-type "
        # Use these flags to force software rendering if GPU fails in Space
        "--disable-gpu-compositing "
    )
    
    # Loop to keep the script running and restart Brave if it crashes
    while True:
        try:
            # We use .run() here to block until Brave closes (if it crashes), then loop restarts it
            subprocess.run(brave_cmd, shell=True, env={**os.environ, "DISPLAY": ":1"})
            time.sleep(1)
        except KeyboardInterrupt:
            print(">>> Stopping services...")
            sys.exit(0)

if __name__ == "__main__":
    main()