pipes/gps_watch_monitor.py

#! /usr/bin/env python2

# Copyright (C) 2014 mru@sisyphus.teil.cc

# auto-start this in your gnome session.
# calls `gps_watch_onconnect.sh` when the watch is connected.
# `gps_watch_onconnect.sh` is searched:
# in ~/.gps_watch_onconnect.sh
# in $(prefix)/share/gps_watch_onconnect.sh

# set up a gnome-terminal configuration "keep-open", that 
# doesn't close when the command finishes

# monitors the udev messages to find out when the watch is connected.

import subprocess
import os
import stat
import sys
import os.path
import pyudev
import pyudev.glib
import gobject
import glib
import gtk
import vte

from pyudev.glib import GUDevMonitorObserver as MonitorObserver


HOME=os.path.expanduser("~")

class ShellWindow(gtk.Window):
    def __init__(self, command):
        gtk.Window.__init__(self)
        self.set_default_size(600, 300)


        box = gtk.VBox()
        label = gtk.Label("Importing tracks from watch")
        terminal = vte.Terminal()

        box.add(terminal)
        box.add(label)
        self.add(box)

        def on_exit(event):
            label.set_text("Finished")
        terminal.connect('child-exited', on_exit)

        terminal.fork_command(command = command[0], argv=command, directory=HOME)

def device_added_callback(device, event, b):

    if event != "add":
        return
    if b['ID_MODEL'] != "CP2104_USB_to_UART_Bridge_Controller":
        return

    device_fn = b['DEVNAME']

    p1 = os.path.join(HOME, ".gps_watch_onconnect.sh")
    p2 = os.path.join("/usr/share/crane_gps_watch_client", "gps_watch_onconnect.sh")
    
    script = None
    if os.path.exists(p1):
        script = p1
    elif os.path.exists(p2):
        script = p2
    else:
        script = "gps_watch_onconnect.sh"

    

    win = ShellWindow([script, device_fn])
    win.show_all()


context = pyudev.Context()
monitor = pyudev.Monitor.from_netlink(context)
monitor.filter_by(subsystem = 'tty')

observer = MonitorObserver(monitor)

observer.connect('device-event', device_added_callback)
monitor.start();

mainloop = gobject.MainLoop();
mainloop.run()