Tools: don't try to generate messages for hidden files starting with a

dot.

Tools/px_generate_uorb_topic_headers.py

@@ -95,10 +95,16 @@ def convert_dir(inputdir, outputdir, templatedir):
         """
         includepath = incl_default + [':'.join([package, inputdir])]
         for f in os.listdir(inputdir):
+                # Ignore hidden files
+                if f.startswith("."):
+                        continue
+
                 fn = os.path.join(inputdir, f)
-                if os.path.isfile(fn):
-                        convert_file(
-                            fn,
+                # Only look at actual files
+                if not os.path.isfile(fn):
+                        continue
+
+                convert_file(fn,
                              outputdir,
                              templatedir,
                              includepath)