daemon.py

#!/usr/bin/env python3

# Copyright (c) 2017 Geoff Hickey
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# daemonize should be installed with pip.
from daemonize import Daemonize


def start():
    print('hi!')
    # Importing triggerpi will also import the automationhat module, which
    # starts a worker thread. This has to be done *after* daemonizing.
    import triggerpi
    triggerpi.trigger()


if __name__ == '__main__':
    global logger
    print('Starting trigger monitor')
    daemon = Daemonize(app='triggerpi', pid='/tmp/triggerpi.pid', action=start)
    daemon.start()