annotate hgext/win32mbcs.py @ 6267:d036ea711140

Check for patches repo with os.path.isdir not os.path.exists
author Eric Hopper <hopper@omnifarious.org>
date Sun, 02 Mar 2008 08:51:02 -0800
parents 942287cb1f57
children 304484c7e0ba
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1 # win32mbcs.py -- MBCS filename support for Mercurial on Windows
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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: 0.1
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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
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9 # of the GNU General Public License, incorporated herein by reference.
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10 #
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11 """Allow to use shift_jis/big5 filenames on Windows.
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12
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13 There is a well known issue "0x5c problem" on Windows. It is a
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14 trouble on handling path name as raw encoded byte sequence of
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15 problematic encodings like shift_jis or big5. The primary intent
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16 of this extension is to allow using such a encoding on Mercurial
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17 without strange file operation error.
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18
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19 By enabling this extension, hook mechanism is activated and some
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20 functions are altered. Usually, this encoding is your local encoding
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21 on your system by default. So you can get benefit simply by enabling
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22 this extension.
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23
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24 The encoding for filename is same one for terminal by default. You
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25 can change the encoding by setting HGENCODING environment variable.
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26
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27 This extension is usefull for:
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28 * Japanese Windows user using shift_jis encoding.
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29 * Chinese Windows user using big5 encoding.
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30 * Users who want to use a repository created with such a encoding.
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31
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32 Note: Unix people does not need to use this extension.
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33
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34 """
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35
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36 import os
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37 from mercurial.i18n import _
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38 from mercurial import util
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39
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40 __all__ = ['install', 'uninstall', 'reposetup']
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41
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42
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43 # codec and alias names of sjis and big5 to be faked.
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44 _problematic_encodings = util.frozenset([
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45 'big5', 'big5-tw', 'csbig5',
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46 'big5hkscs', 'big5-hkscs', 'hkscs',
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47 'cp932', '932', 'ms932', 'mskanji', 'ms-kanji',
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48 'shift_jis', 'csshiftjis', 'shiftjis', 'sjis', 's_jis',
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49 'shift_jis_2004', 'shiftjis2004', 'sjis_2004', 'sjis2004',
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50 'shift_jisx0213', 'shiftjisx0213', 'sjisx0213', 's_jisx0213',
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51 ])
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52
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53 # attribute name to store original function
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54 _ORIGINAL = '_original'
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55
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56 _ui = None
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57
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58 def decode_with_check(arg):
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59 if isinstance(arg, tuple):
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60 return tuple(map(decode_with_check, arg))
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61 elif isinstance(arg, list):
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62 return map(decode_with_check, arg)
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63 elif isinstance(arg, str):
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64 uarg = arg.decode(util._encoding)
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65 if arg == uarg.encode(util._encoding):
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66 return uarg
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67 else:
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68 raise UnicodeError("Not local encoding")
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69 else:
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70 return arg
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71
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72 def encode_with_check(arg):
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73 if isinstance(arg, tuple):
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74 return tuple(map(encode_with_check, arg))
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75 elif isinstance(arg, list):
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76 return map(encode_with_check, arg)
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77 elif isinstance(arg, unicode):
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78 ret = arg.encode(util._encoding)
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79 return ret
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80 else:
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81 return arg
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82
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83 def wrap(func):
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84
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85 def wrapped(*args):
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86 # check argument is unicode, then call original
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87 for arg in args:
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88 if isinstance(arg, unicode):
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89 return func(*args)
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90 # make decoded argument list into uargs
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91 try:
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92 args = decode_with_check(args)
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93 except UnicodeError, exc:
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94 # If not encoded with _local_fs_encoding, report it then
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95 # continue with calling original function.
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96 _ui.warn(_("WARNING: [win32mbcs] filename conversion fail for" +
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97 " %s: '%s'\n") % (util._encoding, args))
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98 return func(*args)
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99 # call as unicode operation, then return with encoding
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100 return encode_with_check(func(*args))
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101
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102 # fake is only for relevant environment.
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103 if hasattr(func, _ORIGINAL) or \
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104 util._encoding.lower() not in _problematic_encodings:
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105 return func
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106 else:
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107 f = wrapped
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108 f.__name__ = func.__name__
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109 setattr(f, _ORIGINAL, func) # hold original to restore
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110 return f
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111
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112 def unwrap(func):
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113 return getattr(func, _ORIGINAL, func)
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114
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115 def install():
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116 # wrap some python functions and mercurial functions
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117 # to handle raw bytes on Windows.
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118 # NOTE: dirname and basename is safe because they use result
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119 # of os.path.split()
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120 global _ui
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121 if not _ui:
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122 from mercurial import ui
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123 _ui = ui.ui()
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124 os.path.join = wrap(os.path.join)
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125 os.path.split = wrap(os.path.split)
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126 os.path.splitext = wrap(os.path.splitext)
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127 os.path.splitunc = wrap(os.path.splitunc)
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128 os.path.normpath = wrap(os.path.normpath)
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129 os.path.normcase = wrap(os.path.normcase)
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130 os.makedirs = wrap(os.makedirs)
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131 util.endswithsep = wrap(util.endswithsep)
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132 util.splitpath = wrap(util.splitpath)
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133
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134 def uninstall():
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135 # restore original functions.
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136 os.path.join = unwrap(os.path.join)
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137 os.path.split = unwrap(os.path.split)
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138 os.path.splitext = unwrap(os.path.splitext)
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139 os.path.splitunc = unwrap(os.path.splitunc)
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140 os.path.normpath = unwrap(os.path.normpath)
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141 os.path.normcase = unwrap(os.path.normcase)
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142 os.makedirs = unwrap(os.makedirs)
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143 util.endswithsep = unwrap(util.endswithsep)
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144 util.splitpath = unwrap(util.splitpath)
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145
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146
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147 def reposetup(ui, repo):
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148 # TODO: decide use of config section for this extension
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149 global _ui
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150 _ui = ui
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151 if not os.path.supports_unicode_filenames:
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152 ui.warn(_("[win32mbcs] cannot activate on this platform.\n"))
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153 return
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154 # install features of this extension
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155 install()
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156 ui.debug(_("[win32mbcs] activeted with encoding: %s\n") % util._encoding)
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157
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158 # win32mbcs.py ends here