This little script watches for changes made to the source files of your Pebble project and automatically builds and installs the app or watchface to your smartphone.

pebble_deploy.py

import sys
import time  
from subprocess import call
from watchdog.observers import Observer  
from watchdog.events import PatternMatchingEventHandler

class ChangeHandler(PatternMatchingEventHandler):
    patterns = ["*.c", "*.h", "*.json"]
    
    def on_any_event(self, event):
        if not event.is_directory and "/build/" not in event.src_path:
            build_success = call(["pebble", "build"])
            if build_success == 0:
                call(["pebble", "install", "--phone", sys.argv[1]])

        
if __name__ == '__main__':
    if len(sys.argv) <= 1:
        print 'usage: ' + sys.argv[0] + " ip_address_for_pebble"
        sys.exit(1)

    observer = Observer()
    observer.schedule(ChangeHandler(), '.', recursive=True)
    observer.start()

    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        observer.stop()

    observer.join()