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      1 # Copyright 2014 The Chromium Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 # pylint: disable=protected-access
      6 
      7 
      8 class OSVersion(str):
      9   def __new__(cls, friendly_name, sortable_name):
     10     version = str.__new__(cls, friendly_name)
     11     version._sortable_name = sortable_name
     12     return version
     13 
     14   def __lt__(self, other):
     15     return self._sortable_name < other._sortable_name
     16 
     17   def __gt__(self, other):
     18     return self._sortable_name > other._sortable_name
     19 
     20   def __le__(self, other):
     21     return self._sortable_name <= other._sortable_name
     22 
     23   def __ge__(self, other):
     24     return self._sortable_name >= other._sortable_name
     25 
     26 
     27 XP = OSVersion('xp', 5.1)
     28 VISTA = OSVersion('vista', 6.0)
     29 WIN7 = OSVersion('win7', 6.1)
     30 WIN8 = OSVersion('win8', 6.2)
     31 WIN81 = OSVersion('win8.1', 6.3)
     32 WIN10 = OSVersion('win10', 10)
     33 
     34 LEOPARD = OSVersion('leopard', 105)
     35 SNOWLEOPARD = OSVersion('snowleopard', 106)
     36 LION = OSVersion('lion', 107)
     37 MOUNTAINLION = OSVersion('mountainlion', 108)
     38 MAVERICKS = OSVersion('mavericks', 109)
     39 YOSEMITE = OSVersion('yosemite', 1010)
     40 ELCAPITAN = OSVersion('elcapitan', 1011)
     41