author | Nishanth Amuluru <nishanth@fossee.in> |
Tue, 11 Jan 2011 00:23:47 +0530 | |
changeset 134 | 563fe356947d |
parent 69 | c6bca38c1cbf |
permissions | -rw-r--r-- |
69
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# win32mbcs.py -- MBCS filename support for Mercurial |
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# |
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# Copyright (c) 2008 Shun-ichi Goto <shunichi.goto@gmail.com> |
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# |
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# Version: 0.3 |
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# Author: Shun-ichi Goto <shunichi.goto@gmail.com> |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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# |
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|
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'''allow the use of MBCS paths with problematic encodings |
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|
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Some MBCS encodings are not good for some path operations (i.e. |
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splitting path, case conversion, etc.) with its encoded bytes. We call |
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such a encoding (i.e. shift_jis and big5) as "problematic encoding". |
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This extension can be used to fix the issue with those encodings by |
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wrapping some functions to convert to Unicode string before path |
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operation. |
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|
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This extension is useful for: |
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|
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- Japanese Windows users using shift_jis encoding. |
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- Chinese Windows users using big5 encoding. |
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- All users who use a repository with one of problematic encodings on |
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case-insensitive file system. |
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|
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This extension is not needed for: |
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|
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- Any user who use only ASCII chars in path. |
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- Any user who do not use any of problematic encodings. |
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|
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Note that there are some limitations on using this extension: |
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|
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- You should use single encoding in one repository. |
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- If the repository path ends with 0x5c, .hg/hgrc cannot be read. |
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- win32mbcs is not compatible with fixutf8 extention. |
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|
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By default, win32mbcs uses encoding.encoding decided by Mercurial. |
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You can specify the encoding by config option:: |
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|
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[win32mbcs] |
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encoding = sjis |
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|
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It is useful for the users who want to commit with UTF-8 log message. |
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''' |
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import os, sys |
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from mercurial.i18n import _ |
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from mercurial import util, encoding |
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|
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_encoding = None # see extsetup |
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|
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def decode(arg): |
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if isinstance(arg, str): |
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uarg = arg.decode(_encoding) |
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if arg == uarg.encode(_encoding): |
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return uarg |
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raise UnicodeError("Not local encoding") |
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elif isinstance(arg, tuple): |
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return tuple(map(decode, arg)) |
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elif isinstance(arg, list): |
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return map(decode, arg) |
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elif isinstance(arg, dict): |
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for k, v in arg.items(): |
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arg[k] = decode(v) |
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return arg |
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def encode(arg): |
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if isinstance(arg, unicode): |
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return arg.encode(_encoding) |
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elif isinstance(arg, tuple): |
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return tuple(map(encode, arg)) |
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elif isinstance(arg, list): |
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return map(encode, arg) |
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elif isinstance(arg, dict): |
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for k, v in arg.items(): |
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arg[k] = encode(v) |
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return arg |
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def appendsep(s): |
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# ensure the path ends with os.sep, appending it if necessary. |
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try: |
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us = decode(s) |
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except UnicodeError: |
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us = s |
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if us and us[-1] not in ':/\\': |
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s += os.sep |
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return s |
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def wrapper(func, args, kwds): |
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# check argument is unicode, then call original |
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for arg in args: |
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if isinstance(arg, unicode): |
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return func(*args, **kwds) |
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|
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try: |
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# convert arguments to unicode, call func, then convert back |
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return encode(func(*decode(args), **decode(kwds))) |
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except UnicodeError: |
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raise util.Abort(_("[win32mbcs] filename conversion failed with" |
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" %s encoding\n") % (_encoding)) |
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103 |
|
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def wrapperforlistdir(func, args, kwds): |
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# Ensure 'path' argument ends with os.sep to avoids |
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# misinterpreting last 0x5c of MBCS 2nd byte as path separator. |
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if args: |
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108 |
args = list(args) |
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args[0] = appendsep(args[0]) |
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if 'path' in kwds: |
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kwds['path'] = appendsep(kwds['path']) |
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112 |
return func(*args, **kwds) |
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113 |
|
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114 |
def wrapname(name, wrapper): |
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115 |
module, name = name.rsplit('.', 1) |
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module = sys.modules[module] |
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117 |
func = getattr(module, name) |
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def f(*args, **kwds): |
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return wrapper(func, args, kwds) |
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try: |
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f.__name__ = func.__name__ # fail with python23 |
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except Exception: |
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pass |
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setattr(module, name, f) |
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125 |
|
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# List of functions to be wrapped. |
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# NOTE: os.path.dirname() and os.path.basename() are safe because |
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# they use result of os.path.split() |
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funcs = '''os.path.join os.path.split os.path.splitext |
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os.path.splitunc os.path.normpath os.path.normcase os.makedirs |
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mercurial.util.endswithsep mercurial.util.splitpath mercurial.util.checkcase |
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mercurial.util.fspath mercurial.util.pconvert mercurial.util.normpath''' |
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133 |
|
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# codec and alias names of sjis and big5 to be faked. |
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problematic_encodings = '''big5 big5-tw csbig5 big5hkscs big5-hkscs |
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hkscs cp932 932 ms932 mskanji ms-kanji shift_jis csshiftjis shiftjis |
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sjis s_jis shift_jis_2004 shiftjis2004 sjis_2004 sjis2004 |
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shift_jisx0213 shiftjisx0213 sjisx0213 s_jisx0213 950 cp950 ms950 ''' |
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139 |
|
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def extsetup(ui): |
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# TODO: decide use of config section for this extension |
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if not os.path.supports_unicode_filenames: |
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ui.warn(_("[win32mbcs] cannot activate on this platform.\n")) |
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return |
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# determine encoding for filename |
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global _encoding |
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_encoding = ui.config('win32mbcs', 'encoding', encoding.encoding) |
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# fake is only for relevant environment. |
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if _encoding.lower() in problematic_encodings.split(): |
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for f in funcs.split(): |
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wrapname(f, wrapper) |
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wrapname("mercurial.osutil.listdir", wrapperforlistdir) |
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# Check sys.args manually instead of using ui.debug() because |
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# command line options is not yet applied when |
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# extensions.loadall() is called. |
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if '--debug' in sys.argv: |
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ui.write("[win32mbcs] activated with encoding: %s\n" |
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% _encoding) |
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159 |