def write_tree_diff(f, store, old_tree, new_tree, diff_binary=False):
 changes = store.tree_changes(old_tree, new_tree)
 for ((oldpath, newpath), (oldmode, newmode), (oldsha, newsha)) in changes:
  write_object_diff(f, store, (oldpath, oldmode, oldsha), (newpath, newmode, newsha), diff_binary=diff_binary)

def write_tree_diff ( f , store , old_tree , new_tree , diff_binary = False ) : changes = store . tree_changes ( old_tree , new_tree ) for ( ( oldpath , newpath ) , ( oldmode , newmode ) , ( oldsha , newsha ) ) in changes : write_object_diff ( f , store , ( oldpath , oldmode , oldsha ) , ( newpath , newmode , newsha ) , diff_binary = diff_binary )
write tree diff .