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annotate mercurial/interfaces/util.py @ 43013:198b51d453fe

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automation: use LSB_RELEASE instead of DEBIAN_VERSION This should be more robust since I believe the minor version can change mid release. Differential Revision: https://phab.mercurial-scm.org/D6910
author Gregory Szorc <gregory.szorc@gmail.com>
date Sun, 29 Sep 2019 10:17:20 -0700
parents 2c4f656c8e9f
children 2372284d9457
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2c4f656c8e9f interfaceutil: move to interfaces/
Pulkit Goyal <pulkit@yandex-team.ru>
parents: 37810
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1 # util.py - Utilities for declaring interfaces.
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2 #
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3 # Copyright 2018 Gregory Szorc <gregory.szorc@gmail.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 # zope.interface imposes a run-time cost due to module import overhead and
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9 # bookkeeping for declaring interfaces. So, we use stubs for various
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10 # zope.interface primitives unless instructed otherwise.
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11
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12 from __future__ import absolute_import
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13
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14 from .. import (
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15 encoding,
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16 )
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17
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18 if encoding.environ.get('HGREALINTERFACES'):
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19 from ..thirdparty.zope import (
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20 interface as zi,
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21 )
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22
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23 Attribute = zi.Attribute
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24 Interface = zi.Interface
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25 implementer = zi.implementer
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26 else:
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27 class Attribute(object):
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28 def __init__(self, __name__, __doc__=''):
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29 pass
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30
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31 class Interface(object):
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32 def __init__(self, name, bases=(), attrs=None, __doc__=None,
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33 __module__=None):
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34 pass
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35
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36 def implementer(*ifaces):
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37 def wrapper(cls):
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38 return cls
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39
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40 return wrapper