+ """Sort the #include lines of a specific file."""
+
+ # Skip files which are under INPUTS trees or test trees.
+ if 'INPUTS/' in f.name or 'test/' in f.name:
+ return
+
+ ext = os.path.splitext(f.name)[1]
+ if ext not in ['.cpp', '.c', '.h', '.inc', '.def']:
+ return
+