Rework list_builder.py

FAAAAAASTEEEEEEER

tools/appslib/xmpplogger.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+import subprocess
+from shutil import which
+import logging
+import logging.handlers
+
+
+class XmppLogHandler(logging.Handler):
+    def __init__(self):
+        logging.Handler.__init__(self)
+        self.is_logging = False
+
+    def emit(self, record):
+        if which("sendxmpppy") is None:
+            return
+
+        msg = f"[Applist builder error] {record.msg}"
+        subprocess.call(["sendxmpppy", msg], stdout=subprocess.DEVNULL)
+
+    @classmethod
+    def add(cls, level=logging.ERROR):
+        if not logging.getLogger().handlers:
+            logging.basicConfig()
+
+        # create handler
+        handler = cls()
+        handler.setLevel(level)
+        # add the handler
+        logging.getLogger().handlers.append(handler)
+
+
+XmppLogHandler.add(logging.ERROR)