Mercurial > hg
annotate hgext/win32mbcs.py @ 9171:a458b9bf4f3a
hg: better wrapping of string literal
author | Martin Geisler <mg@lazybytes.net> |
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date | Fri, 17 Jul 2009 20:52:21 +0200 |
parents | 47ce7a3a1fb0 |
children | 9b2649b6ce5c |
rev | line source |
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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: 0.2 |
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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, incorporated herein by reference. |
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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. splitting |
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15 path, case conversion, etc.) with its encoded bytes. We call such a encoding |
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16 (i.e. shift_jis and big5) as "problematic encoding". This extension can be |
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17 used to fix the issue with those encodings by wrapping some functions to |
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18 convert to Unicode string before path operation. |
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19 |
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20 This extension is useful for: |
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21 * Japanese Windows users using shift_jis encoding. |
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22 * Chinese Windows users using big5 encoding. |
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23 * All users who use a repository with one of problematic encodings on |
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24 case-insensitive file system. |
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25 |
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26 This extension is not needed for: |
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27 * Any user who use only ASCII chars in path. |
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28 * Any user who do not use any of problematic encodings. |
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29 |
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30 Note that there are some limitations on using this extension: |
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31 * You should use single encoding in one repository. |
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32 * You should set same encoding for the repository by locale or HGENCODING. |
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33 |
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34 Path encoding conversion are done between Unicode and encoding.encoding which |
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35 is decided by Mercurial from current locale setting or HGENCODING. |
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36 ''' |
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37 |
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38 import os, sys |
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39 from mercurial.i18n import _ |
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40 from mercurial import util, encoding |
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41 |
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42 def decode(arg): |
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43 if isinstance(arg, str): |
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44 uarg = arg.decode(encoding.encoding) |
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45 if arg == uarg.encode(encoding.encoding): |
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46 return uarg |
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47 raise UnicodeError("Not local encoding") |
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48 elif isinstance(arg, tuple): |
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49 return tuple(map(decode, arg)) |
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50 elif isinstance(arg, list): |
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51 return map(decode, arg) |
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52 elif isinstance(arg, dict): |
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53 for k, v in arg.items(): |
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54 arg[k] = decode(v) |
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55 return arg |
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56 |
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57 def encode(arg): |
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58 if isinstance(arg, unicode): |
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59 return arg.encode(encoding.encoding) |
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60 elif isinstance(arg, tuple): |
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61 return tuple(map(encode, arg)) |
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62 elif isinstance(arg, list): |
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63 return map(encode, arg) |
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64 elif isinstance(arg, dict): |
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65 for k, v in arg.items(): |
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66 arg[k] = encode(v) |
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67 return arg |
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68 |
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69 def appendsep(s): |
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70 # ensure the path ends with os.sep, appending it if necessary. |
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71 try: |
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72 us = decode(s) |
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73 except UnicodeError: |
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74 us = s |
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75 if us and us[-1] not in ':/\\': |
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76 s += os.sep |
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77 return s |
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78 |
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79 def wrapper(func, args, kwds): |
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80 # check argument is unicode, then call original |
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81 for arg in args: |
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82 if isinstance(arg, unicode): |
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83 return func(*args, **kwds) |
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84 |
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85 try: |
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86 # convert arguments to unicode, call func, then convert back |
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87 return encode(func(*decode(args), **decode(kwds))) |
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88 except UnicodeError: |
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89 raise util.Abort(_("[win32mbcs] filename conversion failed with" |
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90 " %s encoding\n") % (encoding.encoding)) |
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91 |
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92 def wrapperforlistdir(func, args, kwds): |
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93 # Ensure 'path' argument ends with os.sep to avoids |
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94 # misinterpreting last 0x5c of MBCS 2nd byte as path separator. |
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95 if args: |
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96 args = list(args) |
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97 args[0] = appendsep(args[0]) |
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98 if kwds.has_key('path'): |
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99 kwds['path'] = appendsep(kwds['path']) |
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100 return func(*args, **kwds) |
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101 |
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102 def wrapname(name, wrapper): |
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103 module, name = name.rsplit('.', 1) |
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104 module = sys.modules[module] |
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105 func = getattr(module, name) |
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106 def f(*args, **kwds): |
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107 return wrapper(func, args, kwds) |
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108 try: |
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109 f.__name__ = func.__name__ # fail with python23 |
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110 except Exception: |
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111 pass |
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112 setattr(module, name, f) |
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113 |
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114 # List of functions to be wrapped. |
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115 # NOTE: os.path.dirname() and os.path.basename() are safe because |
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116 # they use result of os.path.split() |
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117 funcs = '''os.path.join os.path.split os.path.splitext |
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118 os.path.splitunc os.path.normpath os.path.normcase os.makedirs |
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119 mercurial.util.endswithsep mercurial.util.splitpath mercurial.util.checkcase |
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120 mercurial.util.fspath mercurial.windows.pconvert''' |
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121 |
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122 # codec and alias names of sjis and big5 to be faked. |
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123 problematic_encodings = '''big5 big5-tw csbig5 big5hkscs big5-hkscs |
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124 hkscs cp932 932 ms932 mskanji ms-kanji shift_jis csshiftjis shiftjis |
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125 sjis s_jis shift_jis_2004 shiftjis2004 sjis_2004 sjis2004 |
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126 shift_jisx0213 shiftjisx0213 sjisx0213 s_jisx0213 950 cp950 ms950 ''' |
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127 |
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128 def reposetup(ui, repo): |
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129 # TODO: decide use of config section for this extension |
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130 if not os.path.supports_unicode_filenames: |
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131 ui.warn(_("[win32mbcs] cannot activate on this platform.\n")) |
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132 return |
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133 |
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134 # fake is only for relevant environment. |
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135 if encoding.encoding.lower() in problematic_encodings.split(): |
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136 for f in funcs.split(): |
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137 wrapname(f, wrapper) |
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138 wrapname("mercurial.osutil.listdir", wrapperforlistdir) |
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139 ui.debug(_("[win32mbcs] activated with encoding: %s\n") |
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140 % encoding.encoding) |
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141 |