onchange.py

#!/usr/bin/python

import os
from time import sleep

import plumbum as pb
import plumbum.cli as cli
from plumbum.cmd import inotifywait



EVENTS = ["CREATE", "CLOSE_WRITE", "DELETE",
          "MODIFY", "MOVED_FROM", "MOVED_TO"]


class App(cli.Application):
    def __init__(self,*args, **kwargs):
        super(App, self).__init__(*args, **kwargs)
        self.watched_location = None

    @cli.switch(["-l", "--location"], str)
    def location(self, location):
        self.watched_location = location

    def main(self, on_change):
        cmd = inotifywait[
            "-r", "--format", "'%:e %f'",
            "-e", "{}".format(",".join(EVENTS)),
            self.watched_location or "."
        ]

        while True:
            print(" Overwatch! ")
            stdout = cmd()
            os.system(on_change)

if __name__ == "__main__":
    App.run()