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annotate mercurial/utils/interfaceutil.py @ 40527:1b49b84d5ed5

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pycompat: adding Linux detection and fixing Mac Python 3 recommends detecting OSs with the prefix of the platform, but we were comparing the full string for macOS. We also didn't have Linux detection, which is convenient for extensions to use (rather than have some OSs detected by hg and some by the extension). Reference: https://docs.python.org/3/library/sys.html#sys.platform Differential Revision: https://phab.mercurial-scm.org/D5227
author rdamazio@google.com
date Mon, 05 Nov 2018 19:52:42 -0800
parents 856f381ad74b
children
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856f381ad74b interfaceutil: module to stub out zope.interface
Gregory Szorc <gregory.szorc@gmail.com>
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1 # interfaceutil.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