Add arcname argument to tar_stream.TarWriter.add()

tar_stream.py

@@ -11,8 +11,8 @@ class TarWriter:
                                     mode='w|',
                                     format=tarfile.PAX_FORMAT)
 
-    def add(self, path):
-        self.tarfile.add(path, recursive=False)
+    def add(self, path, arcname=None):
+        self.tarfile.add(path, arcname=arcname, recursive=False)
         # Keep memory consumption down
         self.tarfile.members = []
         self.tarfile.inodes = {}