Update loose.py

Author: DEKHTIARJonathan

Diff for: gitdb/db/loose.py

@@ -36,6 +36,7 @@
     chmod,
     isfile,
     remove,
+    rename,
     dirname,
     basename,
     join
@@ -52,8 +53,8 @@
 
 import tempfile
 import os
-import shutil
 import sys
+import time
 
 
 __all__ = ('LooseObjectDB', )
@@ -225,14 +226,18 @@ def store(self, istream):
             if isfile(obj_path):
                 remove(tmp_path)
             else:
-                shutil.copyfile(tmp_path, obj_path)
-                remove(tmp_path)
+                rename(tmp_path, obj_path)
                 tmp_path = None
             # end rename only if needed
 
             # make sure its readable for all ! It started out as rw-- tmp file
             # but needs to be rwrr
-            chmod(obj_path, self.new_objects_mode)
+            for _ in range(3):
+                suppress(PermissionError):
+                    chmod(obj_path, self.new_objects_mode)
+                    break
+            else:
+                raise PermissionError("Impossible to apply `chmod` to file {}".format(obj_path))
         # END handle dry_run
 
         istream.binsha = hex_to_bin(hexsha)