Mercurial > hg
annotate mercurial/pycompat.py @ 42707:3cffc7bbec26
copies: extract an explicit `computechangesetcopie` method from context
Right now, the logic around changeset centric copies data are buried into the
"changectx" code. We extract this code in a dedicated method (in the copies
module) for clarity. This clarity will help to explicitly compute and caches
these data in the future.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Tue, 06 Aug 2019 03:17:40 +0200 |
parents | 1b49b84d5ed5 |
children | 2cc453284d5c |
rev | line source |
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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 |
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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 import getopt |
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14 import inspect |
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15 import os |
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16 import shlex |
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17 import sys |
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18 import tempfile |
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19 |
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20 ispy3 = (sys.version_info[0] >= 3) |
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21 ispypy = (r'__pypy__' in sys.builtin_module_names) |
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22 |
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23 if not ispy3: |
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24 import cookielib |
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25 import cPickle as pickle |
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26 import httplib |
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27 import Queue as queue |
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28 import SocketServer as socketserver |
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29 import xmlrpclib |
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30 |
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31 from .thirdparty.concurrent import futures |
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32 |
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33 def future_set_exception_info(f, exc_info): |
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34 f.set_exception_info(*exc_info) |
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35 else: |
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36 import concurrent.futures as futures |
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37 import http.cookiejar as cookielib |
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38 import http.client as httplib |
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39 import pickle |
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40 import queue as queue |
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41 import socketserver |
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42 import xmlrpc.client as xmlrpclib |
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43 |
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44 def future_set_exception_info(f, exc_info): |
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45 f.set_exception(exc_info[0]) |
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46 |
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47 def identity(a): |
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48 return a |
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49 |
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50 def _rapply(f, xs): |
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51 if xs is None: |
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52 # assume None means non-value of optional data |
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53 return xs |
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54 if isinstance(xs, (list, set, tuple)): |
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55 return type(xs)(_rapply(f, x) for x in xs) |
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56 if isinstance(xs, dict): |
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57 return type(xs)((_rapply(f, k), _rapply(f, v)) for k, v in xs.items()) |
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58 return f(xs) |
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59 |
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60 def rapply(f, xs): |
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61 """Apply function recursively to every item preserving the data structure |
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62 |
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63 >>> def f(x): |
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64 ... return 'f(%s)' % x |
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65 >>> rapply(f, None) is None |
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66 True |
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67 >>> rapply(f, 'a') |
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68 'f(a)' |
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69 >>> rapply(f, {'a'}) == {'f(a)'} |
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70 True |
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71 >>> rapply(f, ['a', 'b', None, {'c': 'd'}, []]) |
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72 ['f(a)', 'f(b)', None, {'f(c)': 'f(d)'}, []] |
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73 |
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74 >>> xs = [object()] |
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75 >>> rapply(identity, xs) is xs |
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76 True |
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77 """ |
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78 if f is identity: |
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79 # fast path mainly for py2 |
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80 return xs |
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81 return _rapply(f, xs) |
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82 |
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83 if ispy3: |
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84 import builtins |
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85 import functools |
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86 import io |
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87 import struct |
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88 |
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89 fsencode = os.fsencode |
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90 fsdecode = os.fsdecode |
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91 oscurdir = os.curdir.encode('ascii') |
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92 oslinesep = os.linesep.encode('ascii') |
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93 osname = os.name.encode('ascii') |
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94 ospathsep = os.pathsep.encode('ascii') |
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95 ospardir = os.pardir.encode('ascii') |
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96 ossep = os.sep.encode('ascii') |
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97 osaltsep = os.altsep |
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98 if osaltsep: |
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99 osaltsep = osaltsep.encode('ascii') |
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100 |
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101 sysplatform = sys.platform.encode('ascii') |
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102 sysexecutable = sys.executable |
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103 if sysexecutable: |
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104 sysexecutable = os.fsencode(sysexecutable) |
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105 bytesio = io.BytesIO |
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106 # TODO deprecate stringio name, as it is a lie on Python 3. |
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107 stringio = bytesio |
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108 |
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109 def maplist(*args): |
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110 return list(map(*args)) |
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111 |
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112 def rangelist(*args): |
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113 return list(range(*args)) |
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114 |
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115 def ziplist(*args): |
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116 return list(zip(*args)) |
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117 |
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118 rawinput = input |
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119 getargspec = inspect.getfullargspec |
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120 |
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121 long = int |
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122 |
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123 # TODO: .buffer might not exist if std streams were replaced; we'll need |
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124 # a silly wrapper to make a bytes stream backed by a unicode one. |
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125 stdin = sys.stdin.buffer |
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126 stdout = sys.stdout.buffer |
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127 stderr = sys.stderr.buffer |
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128 |
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129 # Since Python 3 converts argv to wchar_t type by Py_DecodeLocale() on Unix, |
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130 # we can use os.fsencode() to get back bytes argv. |
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131 # |
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132 # https://hg.python.org/cpython/file/v3.5.1/Programs/python.c#l55 |
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133 # |
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134 # TODO: On Windows, the native argv is wchar_t, so we'll need a different |
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135 # workaround to simulate the Python 2 (i.e. ANSI Win32 API) behavior. |
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136 if getattr(sys, 'argv', None) is not None: |
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137 sysargv = list(map(os.fsencode, sys.argv)) |
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138 |
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139 bytechr = struct.Struct(r'>B').pack |
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140 byterepr = b'%r'.__mod__ |
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141 |
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142 class bytestr(bytes): |
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143 """A bytes which mostly acts as a Python 2 str |
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144 |
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145 >>> bytestr(), bytestr(bytearray(b'foo')), bytestr(u'ascii'), bytestr(1) |
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146 ('', 'foo', 'ascii', '1') |
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147 >>> s = bytestr(b'foo') |
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148 >>> assert s is bytestr(s) |
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149 |
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150 __bytes__() should be called if provided: |
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151 |
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152 >>> class bytesable(object): |
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153 ... def __bytes__(self): |
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154 ... return b'bytes' |
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155 >>> bytestr(bytesable()) |
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156 'bytes' |
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157 |
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158 There's no implicit conversion from non-ascii str as its encoding is |
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159 unknown: |
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160 |
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161 >>> bytestr(chr(0x80)) # doctest: +ELLIPSIS |
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162 Traceback (most recent call last): |
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163 ... |
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164 UnicodeEncodeError: ... |
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165 |
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166 Comparison between bytestr and bytes should work: |
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167 |
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168 >>> assert bytestr(b'foo') == b'foo' |
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169 >>> assert b'foo' == bytestr(b'foo') |
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170 >>> assert b'f' in bytestr(b'foo') |
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171 >>> assert bytestr(b'f') in b'foo' |
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172 |
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173 Sliced elements should be bytes, not integer: |
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174 |
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175 >>> s[1], s[:2] |
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176 (b'o', b'fo') |
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177 >>> list(s), list(reversed(s)) |
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178 ([b'f', b'o', b'o'], [b'o', b'o', b'f']) |
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179 |
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180 As bytestr type isn't propagated across operations, you need to cast |
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181 bytes to bytestr explicitly: |
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182 |
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183 >>> s = bytestr(b'foo').upper() |
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184 >>> t = bytestr(s) |
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185 >>> s[0], t[0] |
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186 (70, b'F') |
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187 |
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188 Be careful to not pass a bytestr object to a function which expects |
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189 bytearray-like behavior. |
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190 |
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191 >>> t = bytes(t) # cast to bytes |
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192 >>> assert type(t) is bytes |
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193 """ |
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194 |
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195 def __new__(cls, s=b''): |
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196 if isinstance(s, bytestr): |
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197 return s |
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198 if (not isinstance(s, (bytes, bytearray)) |
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199 and not hasattr(s, u'__bytes__')): # hasattr-py3-only |
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200 s = str(s).encode(u'ascii') |
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201 return bytes.__new__(cls, s) |
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202 |
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203 def __getitem__(self, key): |
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204 s = bytes.__getitem__(self, key) |
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205 if not isinstance(s, bytes): |
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206 s = bytechr(s) |
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207 return s |
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208 |
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209 def __iter__(self): |
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210 return iterbytestr(bytes.__iter__(self)) |
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211 |
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212 def __repr__(self): |
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213 return bytes.__repr__(self)[1:] # drop b'' |
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214 |
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215 def iterbytestr(s): |
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216 """Iterate bytes as if it were a str object of Python 2""" |
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217 return map(bytechr, s) |
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218 |
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219 def maybebytestr(s): |
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220 """Promote bytes to bytestr""" |
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221 if isinstance(s, bytes): |
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222 return bytestr(s) |
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223 return s |
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224 |
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225 def sysbytes(s): |
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226 """Convert an internal str (e.g. keyword, __doc__) back to bytes |
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227 |
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228 This never raises UnicodeEncodeError, but only ASCII characters |
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229 can be round-trip by sysstr(sysbytes(s)). |
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230 """ |
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231 return s.encode(u'utf-8') |
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232 |
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233 def sysstr(s): |
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234 """Return a keyword str to be passed to Python functions such as |
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235 getattr() and str.encode() |
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236 |
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237 This never raises UnicodeDecodeError. Non-ascii characters are |
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238 considered invalid and mapped to arbitrary but unique code points |
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239 such that 'sysstr(a) != sysstr(b)' for all 'a != b'. |
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240 """ |
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241 if isinstance(s, builtins.str): |
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242 return s |
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243 return s.decode(u'latin-1') |
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244 |
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245 def strurl(url): |
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246 """Converts a bytes url back to str""" |
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247 if isinstance(url, bytes): |
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248 return url.decode(u'ascii') |
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249 return url |
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250 |
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251 def bytesurl(url): |
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252 """Converts a str url to bytes by encoding in ascii""" |
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253 if isinstance(url, str): |
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254 return url.encode(u'ascii') |
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255 return url |
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256 |
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257 def raisewithtb(exc, tb): |
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258 """Raise exception with the given traceback""" |
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259 raise exc.with_traceback(tb) |
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260 |
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261 def getdoc(obj): |
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262 """Get docstring as bytes; may be None so gettext() won't confuse it |
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263 with _('')""" |
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264 doc = getattr(obj, u'__doc__', None) |
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265 if doc is None: |
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266 return doc |
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267 return sysbytes(doc) |
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268 |
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269 def _wrapattrfunc(f): |
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270 @functools.wraps(f) |
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271 def w(object, name, *args): |
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272 return f(object, sysstr(name), *args) |
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273 return w |
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274 |
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275 # these wrappers are automagically imported by hgloader |
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276 delattr = _wrapattrfunc(builtins.delattr) |
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277 getattr = _wrapattrfunc(builtins.getattr) |
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278 hasattr = _wrapattrfunc(builtins.hasattr) |
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279 setattr = _wrapattrfunc(builtins.setattr) |
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280 xrange = builtins.range |
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281 unicode = str |
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282 |
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283 def open(name, mode=b'r', buffering=-1, encoding=None): |
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284 return builtins.open(name, sysstr(mode), buffering, encoding) |
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285 |
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286 safehasattr = _wrapattrfunc(builtins.hasattr) |
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287 |
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288 def _getoptbwrapper(orig, args, shortlist, namelist): |
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289 """ |
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290 Takes bytes arguments, converts them to unicode, pass them to |
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291 getopt.getopt(), convert the returned values back to bytes and then |
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292 return them for Python 3 compatibility as getopt.getopt() don't accepts |
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293 bytes on Python 3. |
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294 """ |
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295 args = [a.decode('latin-1') for a in args] |
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296 shortlist = shortlist.decode('latin-1') |
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297 namelist = [a.decode('latin-1') for a in namelist] |
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298 opts, args = orig(args, shortlist, namelist) |
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299 opts = [(a[0].encode('latin-1'), a[1].encode('latin-1')) |
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300 for a in opts] |
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301 args = [a.encode('latin-1') for a in args] |
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302 return opts, args |
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303 |
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304 def strkwargs(dic): |
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305 """ |
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306 Converts the keys of a python dictonary to str i.e. unicodes so that |
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307 they can be passed as keyword arguments as dictonaries with bytes keys |
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308 can't be passed as keyword arguments to functions on Python 3. |
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309 """ |
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310 dic = dict((k.decode('latin-1'), v) for k, v in dic.iteritems()) |
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311 return dic |
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312 |
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313 def byteskwargs(dic): |
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314 """ |
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315 Converts keys of python dictonaries to bytes as they were converted to |
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316 str to pass that dictonary as a keyword argument on Python 3. |
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317 """ |
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318 dic = dict((k.encode('latin-1'), v) for k, v in dic.iteritems()) |
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319 return dic |
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320 |
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321 # TODO: handle shlex.shlex(). |
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322 def shlexsplit(s, comments=False, posix=True): |
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323 """ |
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324 Takes bytes argument, convert it to str i.e. unicodes, pass that into |
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325 shlex.split(), convert the returned value to bytes and return that for |
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326 Python 3 compatibility as shelx.split() don't accept bytes on Python 3. |
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327 """ |
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328 ret = shlex.split(s.decode('latin-1'), comments, posix) |
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329 return [a.encode('latin-1') for a in ret] |
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330 |
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331 else: |
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332 import cStringIO |
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333 |
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334 xrange = xrange |
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py3: replace `unicode` with pycompat.unicode
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335 unicode = unicode |
31253
64596338ba10
py3: factor out bytechr() function
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336 bytechr = chr |
36265
b44fac3a49fb
py3: factor out byterepr() which returns an asciified value on py3
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337 byterepr = repr |
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b70407bd84d5
pycompat: add bytestr wrapper which mostly acts as a Python 2 str
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338 bytestr = str |
31382
c9fd842dc886
pycompat: add helper to iterate each char in bytes
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339 iterbytestr = iter |
35904
fc44c2657dc5
py3: drop b'' from repr() of smartset
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340 maybebytestr = identity |
31820
45761ef1bc93
py3: have registrar process docstrings in bytes
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341 sysbytes = identity |
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7d2cbe11ae48
pycompat: introduce identity function as a compat stub
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342 sysstr = identity |
32859
a05f3675c46a
py3: add a new strurl() which will convert a bytes url to str
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343 strurl = identity |
32860
f22f39d56bb5
py3: add a new bytesurl() to convert a str url into bytes
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344 bytesurl = identity |
30032
2219f4f82ede
pycompat: extract function that converts attribute or encoding name to str
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345 |
32186
76f9a0009b4b
pycompat: extract helper to raise exception with traceback
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346 # this can't be parsed on Python 3 |
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347 exec('def raisewithtb(exc, tb):\n' |
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348 ' raise exc, None, tb\n') |
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349 |
30133
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pycompat: only accept a bytestring filepath in Python 2
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350 def fsencode(filename): |
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pycompat: move multiline comments above a function to function doc
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351 """ |
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352 Partial backport from os.py in Python 3, which only accepts bytes. |
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353 In Python 2, our paths should only ever be bytes, a unicode path |
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354 indicates a bug. |
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355 """ |
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356 if isinstance(filename, str): |
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357 return filename |
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py3: add an os.fsencode backport to ease path handling
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358 else: |
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359 raise TypeError( |
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py3: byteify strings in pycompat
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360 r"expect str, not %s" % type(filename).__name__) |
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f4a5e0e86a7e
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361 |
30300
42af0590f4b9
py3: add os.fsdecode() as pycompat.fsdecode()
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diff
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362 # In Python 2, fsdecode() has a very chance to receive bytes. So it's |
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363 # better not to touch Python 2 part as it's already working fine. |
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7d2cbe11ae48
pycompat: introduce identity function as a compat stub
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364 fsdecode = identity |
30300
42af0590f4b9
py3: add os.fsdecode() as pycompat.fsdecode()
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diff
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|
365 |
32615
c9318beb7c1a
py3: convert __doc__ back to bytes in help.py
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diff
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366 def getdoc(obj): |
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367 return getattr(obj, '__doc__', None) |
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368 |
37099
6ca5f825a0ca
util: make safehasattr() a pycompat function
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369 _notset = object() |
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util: make safehasattr() a pycompat function
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|
370 |
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util: make safehasattr() a pycompat function
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371 def safehasattr(thing, attr): |
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372 return getattr(thing, attr, _notset) is not _notset |
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373 |
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374 def _getoptbwrapper(orig, args, shortlist, namelist): |
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375 return orig(args, shortlist, namelist) |
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c6ce11f2ee50
py3: make a bytes version of getopt.getopt()
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376 |
31774
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377 strkwargs = identity |
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|
378 byteskwargs = identity |
30579
fbc3f73dc802
py3: utility functions to convert keys of kwargs to bytes/unicodes
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diff
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|
379 |
36648
6585ac350fd9
py3: make os.curdir a bytes
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parents:
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diff
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|
380 oscurdir = os.curdir |
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8181f378b073
pycompat: provide bytes os.linesep
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parents:
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diff
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|
381 oslinesep = os.linesep |
30302
3874ddba1ab4
py3: add a bytes version of os.name
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parents:
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diff
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|
382 osname = os.name |
30303
ad40d307a9f0
py3: have pycompat.ospathsep and pycompat.ossep
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parents:
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diff
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|
383 ospathsep = os.pathsep |
36647
052351e3e1cd
py3: make os.pardir a bytes
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384 ospardir = os.pardir |
30303
ad40d307a9f0
py3: have pycompat.ospathsep and pycompat.ossep
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parents:
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diff
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|
385 ossep = os.sep |
30623
c6026c20a3ce
py3: have a bytes version of os.altsep
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parents:
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diff
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|
386 osaltsep = os.altsep |
39456
8d858fbf2759
cbor: teach the encoder to handle python `long` type for Windows
Matt Harbison <matt_harbison@yahoo.com>
parents:
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diff
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|
387 long = long |
30472
277f4fe6d01a
py3: provide bytes stdin/out/err through util module
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|
388 stdin = sys.stdin |
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py3: provide bytes stdin/out/err through util module
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389 stdout = sys.stdout |
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diff
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|
390 stderr = sys.stderr |
31277
86cd1f2cfff5
pycompat: verify sys.argv exists before forwarding it (issue5493)
Augie Fackler <augie@google.com>
parents:
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diff
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|
391 if getattr(sys, 'argv', None) is not None: |
86cd1f2cfff5
pycompat: verify sys.argv exists before forwarding it (issue5493)
Augie Fackler <augie@google.com>
parents:
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diff
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|
392 sysargv = sys.argv |
30624
a82a6eee2613
py3: have a bytes version of sys.platform
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parents:
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diff
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|
393 sysplatform = sys.platform |
30668
3fcaf0f660ce
py3: have bytes version of sys.executable
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parents:
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diff
changeset
|
394 sysexecutable = sys.executable |
30678
caf7e1c5efe4
py3: have a bytes version of shlex.split()
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parents:
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diff
changeset
|
395 shlexsplit = shlex.split |
36958
644a02f6b34f
util: prefer "bytesio" to "stringio"
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36934
diff
changeset
|
396 bytesio = cStringIO.StringIO |
644a02f6b34f
util: prefer "bytesio" to "stringio"
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
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|
397 stringio = bytesio |
31501
a1e40ceee640
pycompat: add maplist alias for old map behavior
Augie Fackler <augie@google.com>
parents:
31439
diff
changeset
|
398 maplist = map |
37064
434e520adb8c
annotate: do not construct attr.s object per line while computing history
Yuya Nishihara <yuya@tcha.org>
parents:
36958
diff
changeset
|
399 rangelist = range |
35405
e66d6e938d2d
py3: introduce pycompat.ziplist as zip is a generator on Python 3
Pulkit Goyal <7895pulkit@gmail.com>
parents:
35226
diff
changeset
|
400 ziplist = zip |
33853
cfcfbe6c96f8
py3: select input or raw_input by pycompat
Yuya Nishihara <yuya@tcha.org>
parents:
33626
diff
changeset
|
401 rawinput = raw_input |
36178
646002338365
py3: introduce and use pycompat.getargspec
Augie Fackler <augie@google.com>
parents:
36045
diff
changeset
|
402 getargspec = inspect.getargspec |
34639
a568a46751b6
selectors2: do not use platform.system()
Jun Wu <quark@fb.com>
parents:
34467
diff
changeset
|
403 |
39642
a407f9009392
py3: byteify strings in pycompat
Matt Harbison <matt_harbison@yahoo.com>
parents:
39456
diff
changeset
|
404 isjython = sysplatform.startswith(b'java') |
34644
c0a6c19690ff
pycompat: define operating system constants
Jun Wu <quark@fb.com>
parents:
34639
diff
changeset
|
405 |
40527
1b49b84d5ed5
pycompat: adding Linux detection and fixing Mac
rdamazio@google.com
parents:
39818
diff
changeset
|
406 isdarwin = sysplatform.startswith(b'darwin') |
1b49b84d5ed5
pycompat: adding Linux detection and fixing Mac
rdamazio@google.com
parents:
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diff
changeset
|
407 islinux = sysplatform.startswith(b'linux') |
39642
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py3: byteify strings in pycompat
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diff
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|
408 isposix = osname == b'posix' |
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py3: byteify strings in pycompat
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parents:
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diff
changeset
|
409 iswindows = osname == b'nt' |
35226
5b569d512fbd
fancyopts: use getopt.gnu_getopt()
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diff
changeset
|
410 |
5b569d512fbd
fancyopts: use getopt.gnu_getopt()
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parents:
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diff
changeset
|
411 def getoptb(args, shortlist, namelist): |
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|
412 return _getoptbwrapper(getopt.getopt, args, shortlist, namelist) |
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diff
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|
413 |
5b569d512fbd
fancyopts: use getopt.gnu_getopt()
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diff
changeset
|
414 def gnugetoptb(args, shortlist, namelist): |
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|
415 return _getoptbwrapper(getopt.gnu_getopt, args, shortlist, namelist) |
38164
aac4be30e250
py3: wrap tempfile.mkstemp() to use bytes path
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
416 |
38165
2ce60954b1b7
py3: wrap tempfile.mkdtemp() to use bytes path
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
417 def mkdtemp(suffix=b'', prefix=b'tmp', dir=None): |
2ce60954b1b7
py3: wrap tempfile.mkdtemp() to use bytes path
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|
418 return tempfile.mkdtemp(suffix, prefix, dir) |
2ce60954b1b7
py3: wrap tempfile.mkdtemp() to use bytes path
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parents:
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changeset
|
419 |
38164
aac4be30e250
py3: wrap tempfile.mkstemp() to use bytes path
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parents:
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diff
changeset
|
420 # text=True is not supported; use util.from/tonativeeol() instead |
aac4be30e250
py3: wrap tempfile.mkstemp() to use bytes path
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|
421 def mkstemp(suffix=b'', prefix=b'tmp', dir=None): |
aac4be30e250
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parents:
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|
422 return tempfile.mkstemp(suffix, prefix, dir) |
38166
cc9aa88792fe
py3: wrap tempfile.NamedTemporaryFile() to return bytes fp.name
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parents:
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diff
changeset
|
423 |
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py3: wrap tempfile.NamedTemporaryFile() to return bytes fp.name
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changeset
|
424 # mode must include 'b'ytes as encoding= is not supported |
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|
425 def namedtempfile(mode=b'w+b', bufsize=-1, suffix=b'', prefix=b'tmp', dir=None, |
cc9aa88792fe
py3: wrap tempfile.NamedTemporaryFile() to return bytes fp.name
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diff
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|
426 delete=True): |
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py3: wrap tempfile.NamedTemporaryFile() to return bytes fp.name
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diff
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|
427 mode = sysstr(mode) |
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py3: wrap tempfile.NamedTemporaryFile() to return bytes fp.name
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|
428 assert r'b' in mode |
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diff
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|
429 return tempfile.NamedTemporaryFile(mode, bufsize, suffix=suffix, |
cc9aa88792fe
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|
430 prefix=prefix, dir=dir, delete=delete) |