Mercurial > hg
annotate hgext/win32mbcs.py @ 12145:c407b4ca666e stable
help: make "hg help hgrc" an alias for "hg help config"
author | Martin Geisler <mg@lazybytes.net> |
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date | Thu, 02 Sep 2010 12:53:28 +0200 |
parents | d6512b3e9ac0 |
children | 9696954415db |
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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 |
10263 | 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 |
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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 |