def changes_from_tree(names, lookup_entry, object_store, tree, want_unchanged=False):
 other_names = set(names)
 if (tree is not None):
  for (name, mode, sha) in object_store.iter_tree_contents(tree):
   try:
    (other_sha, other_mode) = lookup_entry(name)
   except KeyError:
    (yield ((name, None), (mode, None), (sha, None)))
   else:
    other_names.remove(name)
    if (want_unchanged or (other_sha != sha) or (other_mode != mode)):
     (yield ((name, name), (mode, other_mode), (sha, other_sha)))
 for name in other_names:
  try:
   (other_sha, other_mode) = lookup_entry(name)
  except KeyError:
   pass
  else:
   (yield ((None, name), (None, other_mode), (None, other_sha)))

def changes_from_tree ( names , lookup_entry , object_store , tree , want_unchanged = False ) : other_names = set ( names ) if ( tree is not None ) : for ( name , mode , sha ) in object_store . iter_tree_contents ( tree ) : try : ( other_sha , other_mode ) = lookup_entry ( name ) except KeyError : ( yield ( ( name , None ) , ( mode , None ) , ( sha , None ) ) ) else : other_names . remove ( name ) if ( want_unchanged or ( other_sha != sha ) or ( other_mode != mode ) ) : ( yield ( ( name , name ) , ( mode , other_mode ) , ( sha , other_sha ) ) ) for name in other_names : try : ( other_sha , other_mode ) = lookup_entry ( name ) except KeyError : pass else : ( yield ( ( None , name ) , ( None , other_mode ) , ( None , other_sha ) ) )
find the differences between the contents of a tree and a working copy .