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annotate mercurial/pycompat.py @ 29324:b501579147f1

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py3: conditionalize cPickle import by adding in util The cPickle is renamed to _pickle in python3 and this C extension is available in pickle which was not included in earlier versions. So imports are conditionalized to import cPickle in py2 and pickle in py3. Moreover the use of pickle in py2 is switched to cPickle as the C extension is faster. The hack is added in util.py and the modules import util.pickle
author Pulkit Goyal <7895pulkit@gmail.com>
date Sat, 04 Jun 2016 14:38:00 +0530
parents 800ec7c048b0
children fbe380dc227a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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6041fb8f2da8 pycompat: add empty and queue to handle py3 divergence
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1 # pycompat.py - portability shim for python 3
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2 #
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3 # This software may be used and distributed according to the terms of the
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4 # GNU General Public License version 2 or any later version.
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5
6041fb8f2da8 pycompat: add empty and queue to handle py3 divergence
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6 """Mercurial portability shim for python 3.
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7
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8 This contains aliases to hide python version-specific details from the core.
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9 """
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10
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11 from __future__ import absolute_import
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12
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13 try:
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b501579147f1 py3: conditionalize cPickle import by adding in util
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14 import cPickle as pickle
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15 pickle.dumps
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16 except ImportError:
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17 import pickle
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18
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19 try:
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68a946e83188 pycompat: add util.stringio to handle py3 divergence
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20 import cStringIO as io
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21 stringio = io.StringIO
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22 except ImportError:
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23 import io
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24 stringio = io.StringIO
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25
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26 try:
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27 import Queue as _queue
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672fc23bf9cc pycompat: fix demand import handling of Queue
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28 _queue.Queue
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29 except ImportError:
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30 import queue as _queue
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31 empty = _queue.Empty
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32 queue = _queue.Queue
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33
28882
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34 class _pycompatstub(object):
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35 pass
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36
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37 def _alias(alias, origin, items):
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38 """ populate a _pycompatstub
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39
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40 copies items from origin to alias
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41 """
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42 def hgcase(item):
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43 return item.replace('_', '').lower()
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44 for item in items:
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45 try:
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46 setattr(alias, hgcase(item), getattr(origin, item))
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47 except AttributeError:
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48 pass
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49
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50 urlreq = _pycompatstub()
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51 urlerr = _pycompatstub()
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52 try:
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53 import urllib2
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54 import urllib
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55 _alias(urlreq, urllib, (
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56 "addclosehook",
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57 "addinfourl",
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58 "ftpwrapper",
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59 "pathname2url",
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60 "quote",
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61 "splitattr",
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62 "splitpasswd",
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63 "splitport",
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64 "splituser",
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65 "unquote",
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66 "url2pathname",
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67 "urlencode",
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68 "urlencode",
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69 ))
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70 _alias(urlreq, urllib2, (
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71 "AbstractHTTPHandler",
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72 "BaseHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
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73 "build_opener",
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timeless <timeless@mozdev.org>
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74 "FileHandler",
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75 "FTPHandler",
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76 "HTTPBasicAuthHandler",
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77 "HTTPDigestAuthHandler",
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78 "HTTPHandler",
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79 "HTTPPasswordMgrWithDefaultRealm",
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80 "HTTPSHandler",
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81 "install_opener",
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82 "ProxyHandler",
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83 "Request",
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84 "urlopen",
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85 ))
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86 _alias(urlerr, urllib2, (
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87 "HTTPError",
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88 "URLError",
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timeless <timeless@mozdev.org>
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89 ))
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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90
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
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91 except ImportError:
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92 import urllib.request
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93 _alias(urlreq, urllib.request, (
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94 "AbstractHTTPHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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95 "addclosehook",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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96 "addinfourl",
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timeless <timeless@mozdev.org>
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97 "BaseHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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98 "build_opener",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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99 "FileHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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100 "FTPHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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101 "ftpwrapper",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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102 "HTTPHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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103 "HTTPSHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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104 "install_opener",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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105 "pathname2url",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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106 "HTTPBasicAuthHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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107 "HTTPDigestAuthHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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108 "ProxyHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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109 "quote",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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110 "Request",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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111 "splitattr",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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112 "splitpasswd",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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113 "splitport",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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114 "splituser",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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115 "unquote",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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116 "url2pathname",
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timeless <timeless@mozdev.org>
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117 "urlopen",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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118 ))
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119 import urllib.error
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120 _alias(urlerr, urllib.error, (
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
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121 "HTTPError",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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122 "URLError",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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123 ))
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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124
28834
2fac032c1269 pycompat: alias xrange to range in py3
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125 try:
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126 xrange
2fac032c1269 pycompat: alias xrange to range in py3
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127 except NameError:
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128 import builtins
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129 builtins.xrange = range