def deltify_pack_objects(objects, window_size=None):
 if (window_size is None):
  window_size = DEFAULT_PACK_DELTA_WINDOW_SIZE
 magic = []
 for (obj, path) in objects:
  magic.append((obj.type_num, path, (- obj.raw_length()), obj))
 magic.sort()
 possible_bases = deque()
 for (type_num, path, neg_length, o) in magic:
  raw = o.as_raw_string()
  winner = raw
  winner_base = None
  for base in possible_bases:
   if (base.type_num != type_num):
    continue
   delta = create_delta(base.as_raw_string(), raw)
   if (len(delta) < len(winner)):
    winner_base = base.sha().digest()
    winner = delta
  (yield (type_num, o.sha().digest(), winner_base, winner))
  possible_bases.appendleft(o)
  while (len(possible_bases) > window_size):
   possible_bases.pop()

def deltify_pack_objects ( objects , window_size = None ) : if ( window_size is None ) : window_size = DEFAULT_PACK_DELTA_WINDOW_SIZE magic = [ ] for ( obj , path ) in objects : magic . append ( ( obj . type_num , path , ( - obj . raw_length ( ) ) , obj ) ) magic . sort ( ) possible_bases = deque ( ) for ( type_num , path , neg_length , o ) in magic : raw = o . as_raw_string ( ) winner = raw winner_base = None for base in possible_bases : if ( base . type_num != type_num ) : continue delta = create_delta ( base . as_raw_string ( ) , raw ) if ( len ( delta ) < len ( winner ) ) : winner_base = base . sha ( ) . digest ( ) winner = delta ( yield ( type_num , o . sha ( ) . digest ( ) , winner_base , winner ) ) possible_bases . appendleft ( o ) while ( len ( possible_bases ) > window_size ) : possible_bases . pop ( )
generate deltas for pack objects .