py3: get around unicode docstrings in test-encoding-textwrap.t and test-help.t

On Python 3, docstrings are converted back to utf-8 bytes, which practically
disables the "if type(message) is pycompat.unicode" hack in gettext(). Let's
add one more workaround for the Py3 path.

mercurial/i18n.py

@@ -1,105 +1,107 b''
 # i18n.py - internationalization support for mercurial
 #
 # Copyright 2005, 2006 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import gettext as gettextmod
 import locale
 import os
 import sys
 
 from . import (
     encoding,
     pycompat,
 )
 
 # modelled after templater.templatepath:
 if getattr(sys, 'frozen', None) is not None:
     module = pycompat.sysexecutable
 else:
     module = pycompat.fsencode(__file__)
 
 _languages = None
 if (pycompat.iswindows
     and 'LANGUAGE' not in encoding.environ
     and 'LC_ALL' not in encoding.environ
     and 'LC_MESSAGES' not in encoding.environ
     and 'LANG' not in encoding.environ):
     # Try to detect UI language by "User Interface Language Management" API
     # if no locale variables are set. Note that locale.getdefaultlocale()
     # uses GetLocaleInfo(), which may be different from UI language.
     # (See http://msdn.microsoft.com/en-us/library/dd374098(v=VS.85).aspx )
     try:
         import ctypes
         langid = ctypes.windll.kernel32.GetUserDefaultUILanguage()
         _languages = [locale.windows_locale[langid]]
     except (ImportError, AttributeError, KeyError):
         # ctypes not found or unknown langid
         pass
 
 _ugettext = None
 
 def setdatapath(datapath):
     datapath = pycompat.fsdecode(datapath)
     localedir = os.path.join(datapath, r'locale')
     t = gettextmod.translation(r'hg', localedir, _languages, fallback=True)
     global _ugettext
     try:
         _ugettext = t.ugettext
     except AttributeError:
         _ugettext = t.gettext
 
 _msgcache = {}  # encoding: {message: translation}
 
 def gettext(message):
     """Translate message.
 
     The message is looked up in the catalog to get a Unicode string,
     which is encoded in the local encoding before being returned.
 
     Important: message is restricted to characters in the encoding
     given by sys.getdefaultencoding() which is most likely 'ascii'.
     """
     # If message is None, t.ugettext will return u'None' as the
     # translation whereas our callers expect us to return None.
     if message is None or not _ugettext:
         return message
 
     cache = _msgcache.setdefault(encoding.encoding, {})
     if message not in cache:
         if type(message) is pycompat.unicode:
             # goofy unicode docstrings in test
             paragraphs = message.split(u'\n\n')
         else:
-            paragraphs = [p.decode("ascii") for p in message.split('\n\n')]
+            # should be ascii, but we have unicode docstrings in test, which
+            # are converted to utf-8 bytes on Python 3.
+            paragraphs = [p.decode("utf-8") for p in message.split('\n\n')]
         # Be careful not to translate the empty string -- it holds the
         # meta data of the .po file.
         u = u'\n\n'.join([p and _ugettext(p) or u'' for p in paragraphs])
         try:
             # encoding.tolocal cannot be used since it will first try to
             # decode the Unicode string. Calling u.decode(enc) really
             # means u.encode(sys.getdefaultencoding()).decode(enc). Since
             # the Python encoding defaults to 'ascii', this fails if the
             # translated string use non-ASCII characters.
             encodingstr = pycompat.sysstr(encoding.encoding)
             cache[message] = u.encode(encodingstr, "replace")
         except LookupError:
             # An unknown encoding results in a LookupError.
             cache[message] = message
     return cache[message]
 
 def _plain():
     if ('HGPLAIN' not in encoding.environ
         and 'HGPLAINEXCEPT' not in encoding.environ):
         return False
     exceptions = encoding.environ.get('HGPLAINEXCEPT', '').strip().split(',')
     return 'i18n' not in exceptions
 
 if _plain():
     _ = lambda message: message
 else:
     _ = gettext