Auto deploy serverless

auto_deploy_sls.py

import time
import subprocess
import threading
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler

valid_events = ['created', 'modified', 'deleted', 'moved']
DEPLOY_AFTER_CHANGE_THRESHOLD = 300
STAGE_NAME = ""
CODE_PATH = "<codebase path>"

def deploy_env():
    process = subprocess.Popen(['sls', 'deploy', '--stage', STAGE_NAME, '-v'],
                               stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE)
    stdout, stderr = process.communicate()
    print(stdout, stderr)

def deploy_service_on_change():
    while True:
        if EventHandler.last_update_time and (int(time.time() - EventHandler.last_update_time) > DEPLOY_AFTER_CHANGE_THRESHOLD):
            EventHandler.last_update_time = None
            deploy_env()
        time.sleep(5)

def start_interval_watcher_thread():
    interval_watcher_thread = threading.Thread(target=deploy_service_on_change)
    interval_watcher_thread.start()


class WatchMyCodebase:
    # Set the directory on watch
    def __init__(self):
        self.observer = Observer()

    def run(self):
        event_handler = EventHandler()
        self.observer.schedule(event_handler, CODE_PATH, recursive=True)
        self.observer.start()
        self.observer.join()


class EventHandler(FileSystemEventHandler):
    """Handle events generated by Watchdog Observer"""
    last_update_time = None

    @classmethod
    def on_any_event(cls, event):
        if event.is_directory:
            """Ignore directory level events, like creating new empty directory etc.."""
            return None

        elif event.event_type in valid_events and '.serverless' not in event.src_path:
            # Ignore events related to changes in .serverless directory, serverless creates few temp file while deploy
            cls.last_update_time = time.time()


if __name__ == '__main__':
    start_interval_watcher_thread()
    watch = WatchMyCodebase()
    watch.run()