Use .pymavlink folder and no need for resets

DFReader.py

@@ -567,16 +567,15 @@ def reset(self):
         self.data = None
         self.metadata_load_attempted = False
 
-    # Copy of function in mp_util, to avoid dependency on MavProxy
-    def dot_mavproxy(self, name=None):
+    def dot_pymavlink(self, *args):
         '''return a path to store mavproxy data'''
         if 'HOME' not in os.environ:
-            dir = os.path.join(os.environ['LOCALAPPDATA'], '.mavproxy')
+            dir = os.path.join(os.environ['LOCALAPPDATA'], '.pymavlink')
         else:
-            dir = os.path.join(os.environ['HOME'], '.mavproxy')
-        if name is None:
+            dir = os.path.join(os.environ['HOME'], '.pymavlink')
+        if len(args) == 0:
             return dir
-        return os.path.join(dir, name)
+        return os.path.join(dir, *args)
 
     def metadata_tree(self, verbose=False):
         ''' return a map between a log message and its metadata. May return
@@ -597,7 +596,7 @@ def metadata_tree(self, verbose=False):
                    }
         if self.parent.mav_type not in mapping:
             return None
-        path = self.dot_mavproxy(os.path.join("LogMessages", "%s.xml" % mapping[self.parent.mav_type]))
+        path = self.dot_pymavlink("LogMessages", "%s.xml" % mapping[self.parent.mav_type])
         # Does the file exist?
         if not os.path.exists(path):
             if verbose:
@@ -833,8 +832,6 @@ def _add_msg(self, m):
                 self.mav_type = mavutil.mavlink.MAV_TYPE_SUBMARINE
             elif m.Message.find("Blimp") != -1:
                 self.mav_type = mavutil.mavlink.MAV_TYPE_AIRSHIP
-            # Reset the meta data, when mav type is updated
-            self.metadata.reset()
         if type == 'VER' and hasattr(m,'BU'):
             build_types = { 1: mavutil.mavlink.MAV_TYPE_GROUND_ROVER,
                             2: mavutil.mavlink.MAV_TYPE_QUADROTOR,
@@ -847,8 +844,6 @@ def _add_msg(self, m):
             mavtype = build_types.get(m.BU,None)
             if mavtype is not None:
                 self.mav_type = mavtype
-                # Reset the meta data, when mav type is updated
-                self.metadata.reset()
 
         if type == 'MODE':
             if hasattr(m,'Mode') and isinstance(m.Mode, str):