win32mbcs: Add configuration to specify path encoding

Add win32mbcs.encoding configuration option to specify the encoding to
use instead of encoding.encoding.

This option is useful for the users who want to write UTF-8 log
message on non UTF-8 path encoding environment.

hgext/win32mbcs.py

@@ -2,7 +2,7 b''
 #
 # Copyright (c) 2008 Shun-ichi Goto <[e-mail]>
 #
-# Version: 0.2
+# Version: 0.3
 # Author:  Shun-ichi Goto <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
@@ -33,22 +33,29 b' This extension is not needed for:'
 Note that there are some limitations on using this extension:
 
 - You should use single encoding in one repository.
-- You should set same encoding for the repository by locale or
-  HGENCODING.
+
+
+By default, win32mbcs uses encoding.encoding decided by mercurial.
+You can specify the encoding by config option.
 
-Path encoding conversion are done between Unicode and
-encoding.encoding which is decided by Mercurial from current locale
-setting or HGENCODING.
+ ex.)
+ [win32mbcs]
+ encoding = sjis
+
+It is usefull for the users who want to commit with utf-8 log message.
+
 '''
 
 import os, sys
 from mercurial.i18n import _
 from mercurial import util, encoding
 
+_encoding = None                                # see reposetup()
+
 def decode(arg):
     if isinstance(arg, str):
-        uarg = arg.decode(encoding.encoding)
-        if arg == uarg.encode(encoding.encoding):
+        uarg = arg.decode(_encoding)
+        if arg == uarg.encode(_encoding):
             return uarg
         raise UnicodeError("Not local encoding")
     elif isinstance(arg, tuple):
@@ -62,7 +69,7 b' def decode(arg):'
 
 def encode(arg):
     if isinstance(arg, unicode):
-        return arg.encode(encoding.encoding)
+        return arg.encode(_encoding)
     elif isinstance(arg, tuple):
         return tuple(map(encode, arg))
     elif isinstance(arg, list):
@@ -93,7 +100,7 b' def wrapper(func, args, kwds):'
         return encode(func(*decode(args), **decode(kwds)))
     except UnicodeError:
         raise util.Abort(_("[win32mbcs] filename conversion failed with"
-                         " %s encoding\n") % (encoding.encoding))
+                         " %s encoding\n") % (_encoding))
 
 def wrapperforlistdir(func, args, kwds):
     # Ensure 'path' argument ends with os.sep to avoids
@@ -136,12 +143,14 b' def reposetup(ui, repo):'
     if not os.path.supports_unicode_filenames:
         ui.warn(_("[win32mbcs] cannot activate on this platform.\n"))
         return
-
+    # determine encoding for filename
+    global _encoding
+    _encoding = ui.config('win32mbcs', 'encoding', encoding.encoding)
     # fake is only for relevant environment.
-    if encoding.encoding.lower() in problematic_encodings.split():
+    if _encoding.lower() in problematic_encodings.split():
         for f in funcs.split():
             wrapname(f, wrapper)
         wrapname("mercurial.osutil.listdir", wrapperforlistdir)
         ui.debug("[win32mbcs] activated with encoding: %s\n"
-                 % encoding.encoding)
+                 % _encoding)