utils: add method for setting rollover info

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

moonraker/utils.py

@@ -28,19 +28,26 @@ class LocalQueueHandler(logging.handlers.QueueHandler):
         except Exception:
             self.handleError(record)
 
+# Timed Rotating File Handler, based on Klipper's implementation
 class MoonrakerLoggingHandler(logging.handlers.TimedRotatingFileHandler):
     def __init__(self, software_version, filename, **kwargs):
         super(MoonrakerLoggingHandler, self).__init__(filename, **kwargs)
-        self.header = "Moonraker Log Start...\n"
-        self.header += f"Git Version: {software_version}\n"
-        self.header += "="*80 + "\n"
+        self.rollover_info = {
+            'header': f"{'-'*20}Moonraker Log Start{'-'*20}",
+            'version': f"Git Version: {software_version}",
+        }
+        lines = [line for line in self.rollover_info.values() if line]
         if self.stream is not None:
-            self.stream.write(self.header)
+            self.stream.write("\n".join(lines) + "\n")
+
+    def set_rollover_info(self, name, item):
+        self.rollover_info[name] = item
 
     def doRollover(self):
         super(MoonrakerLoggingHandler, self).doRollover()
+        lines = [line for line in self.rollover_info.values() if line]
         if self.stream is not None:
-            self.stream.write(self.header)
+            self.stream.write("\n".join(lines) + "\n")
 
 # Parse the git version from the command line.  This code
 # is borrowed from Klipper.
@@ -78,6 +85,7 @@ def setup_logging(log_file, software_version):
     stdout_fmt = logging.Formatter(
         '[%(filename)s:%(funcName)s()] - %(message)s')
     stdout_hdlr.setFormatter(stdout_fmt)
+    file_hdlr = None
     if log_file:
         file_hdlr = MoonrakerLoggingHandler(
             software_version, log_file, when='midnight', backupCount=2)
@@ -90,4 +98,4 @@ def setup_logging(log_file, software_version):
         listener = logging.handlers.QueueListener(
             queue, stdout_hdlr)
     listener.start()
-    return listener
+    return listener, file_hdlr