annotate hgext/win32mbcs.py @ 12429:01c6be8361df

tests: unify test-hgcia
author Matt Mackall <mpm@selenic.com>
date Sun, 26 Sep 2010 13:41:32 -0500
parents d6512b3e9ac0
children 9696954415db
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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37
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38 By default, win32mbcs uses encoding.encoding decided by Mercurial.
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39 You can specify the encoding by config option::
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40
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41 [win32mbcs]
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42 encoding = sjis
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43
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44 It is useful for the users who want to commit with UTF-8 log message.
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45 '''
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46
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47 import os, sys
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48 from mercurial.i18n import _
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49 from mercurial import util, encoding
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50
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51 _encoding = None # see reposetup()
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52
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53 def decode(arg):
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54 if isinstance(arg, str):
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55 uarg = arg.decode(_encoding)
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56 if arg == uarg.encode(_encoding):
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57 return uarg
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58 raise UnicodeError("Not local encoding")
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59 elif isinstance(arg, tuple):
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60 return tuple(map(decode, arg))
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61 elif isinstance(arg, list):
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62 return map(decode, arg)
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63 elif isinstance(arg, dict):
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64 for k, v in arg.items():
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65 arg[k] = decode(v)
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66 return arg
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67
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68 def encode(arg):
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69 if isinstance(arg, unicode):
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70 return arg.encode(_encoding)
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71 elif isinstance(arg, tuple):
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72 return tuple(map(encode, arg))
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73 elif isinstance(arg, list):
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74 return map(encode, arg)
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75 elif isinstance(arg, dict):
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76 for k, v in arg.items():
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77 arg[k] = encode(v)
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78 return arg
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79
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80 def appendsep(s):
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81 # ensure the path ends with os.sep, appending it if necessary.
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82 try:
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83 us = decode(s)
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84 except UnicodeError:
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85 us = s
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86 if us and us[-1] not in ':/\\':
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87 s += os.sep
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88 return s
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89
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90 def wrapper(func, args, kwds):
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91 # check argument is unicode, then call original
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92 for arg in args:
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93 if isinstance(arg, unicode):
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94 return func(*args, **kwds)
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95
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96 try:
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97 # convert arguments to unicode, call func, then convert back
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98 return encode(func(*decode(args), **decode(kwds)))
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99 except UnicodeError:
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100 raise util.Abort(_("[win32mbcs] filename conversion failed with"
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101 " %s encoding\n") % (_encoding))
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102
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103 def wrapperforlistdir(func, args, kwds):
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104 # Ensure 'path' argument ends with os.sep to avoids
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105 # misinterpreting last 0x5c of MBCS 2nd byte as path separator.
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106 if args:
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107 args = list(args)
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108 args[0] = appendsep(args[0])
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109 if 'path' in kwds:
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110 kwds['path'] = appendsep(kwds['path'])
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111 return func(*args, **kwds)
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112
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113 def wrapname(name, wrapper):
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114 module, name = name.rsplit('.', 1)
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115 module = sys.modules[module]
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116 func = getattr(module, name)
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117 def f(*args, **kwds):
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118 return wrapper(func, args, kwds)
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119 try:
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120 f.__name__ = func.__name__ # fail with python23
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121 except Exception:
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122 pass
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123 setattr(module, name, f)
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124
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125 # List of functions to be wrapped.
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126 # NOTE: os.path.dirname() and os.path.basename() are safe because
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127 # they use result of os.path.split()
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128 funcs = '''os.path.join os.path.split os.path.splitext
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129 os.path.splitunc os.path.normpath os.path.normcase os.makedirs
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130 mercurial.util.endswithsep mercurial.util.splitpath mercurial.util.checkcase
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131 mercurial.util.fspath mercurial.util.pconvert mercurial.util.normpath'''
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132
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133 # codec and alias names of sjis and big5 to be faked.
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134 problematic_encodings = '''big5 big5-tw csbig5 big5hkscs big5-hkscs
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135 hkscs cp932 932 ms932 mskanji ms-kanji shift_jis csshiftjis shiftjis
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136 sjis s_jis shift_jis_2004 shiftjis2004 sjis_2004 sjis2004
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137 shift_jisx0213 shiftjisx0213 sjisx0213 s_jisx0213 950 cp950 ms950 '''
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138
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139 def reposetup(ui, repo):
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140 # TODO: decide use of config section for this extension
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141 if not os.path.supports_unicode_filenames:
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142 ui.warn(_("[win32mbcs] cannot activate on this platform.\n"))
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143 return
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144 # determine encoding for filename
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145 global _encoding
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146 _encoding = ui.config('win32mbcs', 'encoding', encoding.encoding)
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147 # fake is only for relevant environment.
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148 if _encoding.lower() in problematic_encodings.split():
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149 for f in funcs.split():
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150 wrapname(f, wrapper)
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151 wrapname("mercurial.osutil.listdir", wrapperforlistdir)
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152 ui.debug("[win32mbcs] activated with encoding: %s\n"
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153 % _encoding)
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154