kete: bubble up the dbus vanished errors

Not much is done for now, but the shell is notified, which is a big step

tools/tuhi-kete.py

@@ -231,6 +231,8 @@ class TuhiKeteManager(_DBusObject):
     __gsignals__ = {
         'pairable-device':
             (GObject.SIGNAL_RUN_FIRST, None, (GObject.TYPE_PYOBJECT,)),
+        'dbus-name-vanished':
+            (GObject.SIGNAL_RUN_FIRST, None, ()),
     }
 
     def __init__(self):
@@ -320,8 +322,8 @@ class TuhiKeteManager(_DBusObject):
 
     def _on_name_vanished(self, connection, name):
         logger.error('Tuhi daemon went away')
+        self.emit('dbus-name-vanished')
         self.mainloop.quit()
-        # FIXME: need to bubble this up to the Worker
 
     def __getitem__(self, btaddr):
         return self._devices[btaddr]
@@ -541,12 +543,16 @@ class TuhiKeteShell(cmd.Cmd):
         logger.addHandler(self._log_handler)
         # patching get_names to hide some functions we do not want in the help
         self.get_names = self._filtered_get_names
+        manager.connect('dbus-name-vanished', self._on_name_vanished)
 
     def _filtered_get_names(self):
         names = super(TuhiKeteShell, self).get_names()
         names.remove('do_EOF')
         return names
 
+    def _on_name_vanished(self, manager):
+        logger.debug('Tuhi daemon went away, I should stop the current workers')
+
     def emptyline(self):
         # make sure we do not re-enter the last typed command
         pass