Watch code on path (argv[1]) and say if there has been chages on port (argv[2]). The code for frontend in commented in the head. It will install Flask

liveReload.py

# setInterval(() => {
#     fetch('http://127.0.0.1:15555', {mode: 'cors'}).then(res => res.text().then(text => {
#         if (text === '1') {
#             location.reload();
#         }
#     }));
# }, 1000);

import os
import subprocess
import sys
if sys.platform == "linux" or sys.platform == "linux2":
    pkgs = ['Flask', 'inotify']
elif sys.platform == "darwin":
    pkgs = ['Flask', 'MacFSEvents']
else:
    print('Windows is not supported for now')
    sys.exit()

subprocess.call(['pip', 'install'] + pkgs, stdout=open(os.devnull, 'w'))

import datetime
from flask import Flask, Response
import logging

path = sys.argv[1] if len(sys.argv) > 1 else '.'
port = sys.argv[2] if len(sys.argv) > 2 else '15555'
to_reload = False


def callback(*args, **kwargs):
    global to_reload
    print('[' + datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') + '] Refreshing...')
    to_reload = True


def watch_osx(callback):
    from fsevents import Observer, Stream
    observer = Observer()
    stream = Stream(callback, path)
    observer.start()
    observer.schedule(stream)


def watch_linux(callback):
    import inotify
    i = inotify.adapters.Inotify()
    i.add_watch(path)
    for event in i.event_gen(yield_nones=False):
        callback()

if sys.platform == "linux" or sys.platform == "linux2":
    watch_linux(callback)
elif sys.platform == "darwin":
    watch_osx(callback)

app = Flask('live-reload')
log = logging.getLogger('werkzeug')
log.setLevel(logging.ERROR)


@app.route("/")
def is_reloaded():
    global to_reload
    res = Response('1' if to_reload else '0')
    res.headers['Access-Control-Allow-Origin'] = '*'
    to_reload = False
    return res

app.run(host='0.0.0.0', port=port)