lemonbar: Attempt to restart i3ws connection 5 times with increasing delay

.i3/lemonbar/i3_lemonbar_modules.py

@@ -414,7 +414,10 @@ class i3Module(LemonModule):
         common.logger.info('Started module {}'.format(self.__class__.__name__))
         common.health_logger.info('Module {} up'.format(self.__class__.__name__))
 
-        self.i3_ws_obj.work() # This is a blocking command
+        try:
+            self.i3_ws_obj.work() # This is a blocking command
+        except ConnectionError:
+            common.logger.info('i3ws failed connecting to i3 socket')
 
         common.logger.info('Reached end of module {}'.format(self.__class__.__name__))
         common.health_logger.info('Module {} down'.format(self.__class__.__name__))
@@ -533,7 +536,7 @@ class i3Module(LemonModule):
         else:
             new_km = self.def_keymap
             common.logger.debug('Setting default keymap {} for {}'.format(new_km, wclass))
-        subprocess.call(['/home/kuba/.i3/scripts/lang.sh', 'qset', new_km])
+        subprocess.call(['/home/kuba/.i3/scripts/lang.sh', 'qset', new_km]) # TODO it is this script that writes to fifo, triggering the formatting
 
     def i3msg_comm(self, *cmd):
         self.i3_ws_obj.command(' '.join(cmd))

.i3/lemonbar/i3_workspaces.py

@@ -68,10 +68,21 @@ class i3ws(object):
             self.logger.debug('Started i3 workspaces manager')
             self.enterMain()
             self.logger.debug('Finished i3 workspaces manager')
-            time.sleep(0.5) # TODO max number of attempts + catch exception instead
 
     def resetConn(self):
-        self.conn = i3ipc.Connection()
+
+        def attempt_connection(attempt):
+            try:
+                self.conn = i3ipc.Connection()
+            except FileNotFoundError:
+                # Thrown when i3 is not up. Should try again in the case of a restart
+                self.logger.debug('Attempt {}: Failed connecting to i3 socket'.format(attempt))
+                if attempt > 5:
+                    raise ConnectionError('Could not connect to i3 socked, quitting')
+                time.sleep(0.1 if attempt < 3 else 0.5)
+                attempt_connection(attempt + 1)
+
+        attempt_connection(attempt=1)
         self.outputs = self.conn.get_outputs()
 
         self.conn.on('workspace::focus' , self.change)