annotate hgext/win32mbcs.py @ 27684:e9857fbfd072

wix: add help for current internal topics This makes the changes in a79cba6cb206 and 84784f834b3a available on Windows. I'm not setup to make the installer, so someone with experience in this area should probably give it a look. In looking around to try to figure out how to build the installer, it looks like the Makefile may need an update to $DOCFILES.
author Matt Harbison <matt_harbison@yahoo.com>
date Thu, 17 Dec 2015 21:24:08 -0500
parents 56b2bcea2529
children 588874c33b4d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # win32mbcs.py -- MBCS filename support for Mercurial
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2 #
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3 # Copyright (c) 2008 Shun-ichi Goto <shunichi.goto@gmail.com>
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4 #
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5 # Version: 0.3
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6 # Author: Shun-ichi Goto <shunichi.goto@gmail.com>
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7 #
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8 # This software may be used and distributed according to the terms of the
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9 # GNU General Public License version 2 or any later version.
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10 #
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11
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12 '''allow the use of MBCS paths with problematic encodings
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13
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14 Some MBCS encodings are not good for some path operations (i.e.
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15 splitting path, case conversion, etc.) with its encoded bytes. We call
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16 such a encoding (i.e. shift_jis and big5) as "problematic encoding".
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17 This extension can be used to fix the issue with those encodings by
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18 wrapping some functions to convert to Unicode string before path
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19 operation.
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20
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21 This extension is useful for:
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22
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23 - Japanese Windows users using shift_jis encoding.
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24 - Chinese Windows users using big5 encoding.
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25 - All users who use a repository with one of problematic encodings on
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26 case-insensitive file system.
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27
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28 This extension is not needed for:
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29
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30 - Any user who use only ASCII chars in path.
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31 - Any user who do not use any of problematic encodings.
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32
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33 Note that there are some limitations on using this extension:
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34
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35 - You should use single encoding in one repository.
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36 - If the repository path ends with 0x5c, .hg/hgrc cannot be read.
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37 - win32mbcs is not compatible with fixutf8 extension.
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38
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39 By default, win32mbcs uses encoding.encoding decided by Mercurial.
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40 You can specify the encoding by config option::
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41
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42 [win32mbcs]
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43 encoding = sjis
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44
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45 It is useful for the users who want to commit with UTF-8 log message.
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46 '''
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47
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48 import os, sys
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49 from mercurial.i18n import _
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50 from mercurial import error, encoding
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51 # Note for extension authors: ONLY specify testedwith = 'internal' for
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52 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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53 # be specifying the version(s) of Mercurial they are tested with, or
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54 # leave the attribute unspecified.
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55 testedwith = 'internal'
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56
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57 _encoding = None # see extsetup
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58
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59 def decode(arg):
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60 if isinstance(arg, str):
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61 uarg = arg.decode(_encoding)
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62 if arg == uarg.encode(_encoding):
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63 return uarg
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64 raise UnicodeError("Not local encoding")
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65 elif isinstance(arg, tuple):
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66 return tuple(map(decode, arg))
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67 elif isinstance(arg, list):
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68 return map(decode, arg)
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69 elif isinstance(arg, dict):
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70 for k, v in arg.items():
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71 arg[k] = decode(v)
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72 return arg
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73
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74 def encode(arg):
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75 if isinstance(arg, unicode):
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76 return arg.encode(_encoding)
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77 elif isinstance(arg, tuple):
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78 return tuple(map(encode, arg))
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79 elif isinstance(arg, list):
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80 return map(encode, arg)
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81 elif isinstance(arg, dict):
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82 for k, v in arg.items():
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83 arg[k] = encode(v)
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84 return arg
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85
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86 def appendsep(s):
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87 # ensure the path ends with os.sep, appending it if necessary.
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88 try:
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89 us = decode(s)
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90 except UnicodeError:
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91 us = s
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92 if us and us[-1] not in ':/\\':
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93 s += os.sep
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94 return s
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95
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96
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97 def basewrapper(func, argtype, enc, dec, args, kwds):
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98 # check check already converted, then call original
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99 for arg in args:
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100 if isinstance(arg, argtype):
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101 return func(*args, **kwds)
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102
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103 try:
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104 # convert string arguments, call func, then convert back the
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105 # return value.
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106 return enc(func(*dec(args), **dec(kwds)))
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107 except UnicodeError:
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108 raise error.Abort(_("[win32mbcs] filename conversion failed with"
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109 " %s encoding\n") % (_encoding))
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110
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111 def wrapper(func, args, kwds):
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112 return basewrapper(func, unicode, encode, decode, args, kwds)
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113
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114
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115 def reversewrapper(func, args, kwds):
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116 return basewrapper(func, str, decode, encode, args, kwds)
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117
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118 def wrapperforlistdir(func, args, kwds):
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119 # Ensure 'path' argument ends with os.sep to avoids
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120 # misinterpreting last 0x5c of MBCS 2nd byte as path separator.
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121 if args:
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122 args = list(args)
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123 args[0] = appendsep(args[0])
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124 if 'path' in kwds:
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125 kwds['path'] = appendsep(kwds['path'])
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126 return func(*args, **kwds)
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127
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128 def wrapname(name, wrapper):
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129 module, name = name.rsplit('.', 1)
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130 module = sys.modules[module]
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131 func = getattr(module, name)
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132 def f(*args, **kwds):
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133 return wrapper(func, args, kwds)
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134 try:
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135 f.__name__ = func.__name__ # fails with Python 2.3
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136 except Exception:
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137 pass
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138 setattr(module, name, f)
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139
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140 # List of functions to be wrapped.
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141 # NOTE: os.path.dirname() and os.path.basename() are safe because
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142 # they use result of os.path.split()
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143 funcs = '''os.path.join os.path.split os.path.splitext
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144 os.path.normpath os.makedirs
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145 mercurial.util.endswithsep mercurial.util.splitpath mercurial.util.checkcase
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146 mercurial.util.fspath mercurial.util.pconvert mercurial.util.normpath
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147 mercurial.util.checkwinfilename mercurial.util.checkosfilename
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148 mercurial.util.split'''
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149
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150 # These functions are required to be called with local encoded string
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151 # because they expects argument is local encoded string and cause
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152 # problem with unicode string.
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153 rfuncs = '''mercurial.encoding.upper mercurial.encoding.lower'''
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154
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155 # List of Windows specific functions to be wrapped.
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156 winfuncs = '''os.path.splitunc'''
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157
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158 # codec and alias names of sjis and big5 to be faked.
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159 problematic_encodings = '''big5 big5-tw csbig5 big5hkscs big5-hkscs
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160 hkscs cp932 932 ms932 mskanji ms-kanji shift_jis csshiftjis shiftjis
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161 sjis s_jis shift_jis_2004 shiftjis2004 sjis_2004 sjis2004
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162 shift_jisx0213 shiftjisx0213 sjisx0213 s_jisx0213 950 cp950 ms950 '''
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163
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164 def extsetup(ui):
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165 # TODO: decide use of config section for this extension
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166 if ((not os.path.supports_unicode_filenames) and
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167 (sys.platform != 'cygwin')):
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168 ui.warn(_("[win32mbcs] cannot activate on this platform.\n"))
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169 return
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170 # determine encoding for filename
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171 global _encoding
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172 _encoding = ui.config('win32mbcs', 'encoding', encoding.encoding)
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173 # fake is only for relevant environment.
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174 if _encoding.lower() in problematic_encodings.split():
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175 for f in funcs.split():
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176 wrapname(f, wrapper)
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177 if os.name == 'nt':
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178 for f in winfuncs.split():
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179 wrapname(f, wrapper)
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180 wrapname("mercurial.osutil.listdir", wrapperforlistdir)
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181 # wrap functions to be called with local byte string arguments
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182 for f in rfuncs.split():
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183 wrapname(f, reversewrapper)
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184 # Check sys.args manually instead of using ui.debug() because
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185 # command line options is not yet applied when
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186 # extensions.loadall() is called.
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187 if '--debug' in sys.argv:
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188 ui.write("[win32mbcs] activated with encoding: %s\n"
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189 % _encoding)