mercurial/i18n.py
author Gregory Szorc <gregory.szorc@gmail.com>
Fri, 13 Apr 2018 12:30:04 -0700
changeset 37651 950294e28136
parent 36835 5bc7ff103081
child 38312 79dd61a4554f
permissions -rw-r--r--
httppeer: implement command executor for version 2 peer Now that we have a new API for issuing commands which is compatible with wire protocol version 2, we can start using it with wire protocol version 2. This commit replaces our hacky implementation of _call() with something a bit more robust based on the new command executor interface. We now have proper support for issuing multiple commands per HTTP request. Each HTTP request maintains its own client reactor. The implementation is similar to the one in the legacy wire protocol. We use a ThreadPoolExecutor for spinning up a thread to read the HTTP response in the background. This allows responses to resolve in any order. While not implemented on the server yet, a client could use concurrent.futures.as_completed() with a collection of futures and handle responses as they arrive from the server. The return value from issued commands is still a simple list of raw or decoded CBOR data. This is still super hacky. We will want a rich data type for representing command responses. But at least this commit gets us one step closer to a proper peer implementation. Differential Revision: https://phab.mercurial-scm.org/D3297
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# i18n.py - internationalization support for mercurial
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#
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# Copyright 2005, 2006 Matt Mackall <mpm@selenic.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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from __future__ import absolute_import
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import gettext as gettextmod
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import locale
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import os
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import sys
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from . import (
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    encoding,
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    pycompat,
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)
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# modelled after templater.templatepath:
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if getattr(sys, 'frozen', None) is not None:
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    module = pycompat.sysexecutable
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else:
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    module = pycompat.fsencode(__file__)
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try:
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    unicode
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except NameError:
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    unicode = str
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_languages = None
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if (pycompat.iswindows
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    and 'LANGUAGE' not in encoding.environ
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    and 'LC_ALL' not in encoding.environ
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    and 'LC_MESSAGES' not in encoding.environ
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    and 'LANG' not in encoding.environ):
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    # Try to detect UI language by "User Interface Language Management" API
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    # if no locale variables are set. Note that locale.getdefaultlocale()
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    # uses GetLocaleInfo(), which may be different from UI language.
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    # (See http://msdn.microsoft.com/en-us/library/dd374098(v=VS.85).aspx )
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    try:
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        import ctypes
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        langid = ctypes.windll.kernel32.GetUserDefaultUILanguage()
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        _languages = [locale.windows_locale[langid]]
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    except (ImportError, AttributeError, KeyError):
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        # ctypes not found or unknown langid
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        pass
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_ugettext = None
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def setdatapath(datapath):
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    datapath = pycompat.fsdecode(datapath)
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    localedir = os.path.join(datapath, r'locale')
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    t = gettextmod.translation(r'hg', localedir, _languages, fallback=True)
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    global _ugettext
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    try:
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        _ugettext = t.ugettext
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    except AttributeError:
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        _ugettext = t.gettext
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_msgcache = {}  # encoding: {message: translation}
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def gettext(message):
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    """Translate message.
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    The message is looked up in the catalog to get a Unicode string,
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    which is encoded in the local encoding before being returned.
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    Important: message is restricted to characters in the encoding
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    given by sys.getdefaultencoding() which is most likely 'ascii'.
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    """
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    # If message is None, t.ugettext will return u'None' as the
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    # translation whereas our callers expect us to return None.
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    if message is None or not _ugettext:
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        return message
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    cache = _msgcache.setdefault(encoding.encoding, {})
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    if message not in cache:
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        if type(message) is unicode:
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            # goofy unicode docstrings in test
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            paragraphs = message.split(u'\n\n')
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        else:
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            paragraphs = [p.decode("ascii") for p in message.split('\n\n')]
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        # Be careful not to translate the empty string -- it holds the
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        # meta data of the .po file.
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        u = u'\n\n'.join([p and _ugettext(p) or u'' for p in paragraphs])
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        try:
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            # encoding.tolocal cannot be used since it will first try to
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            # decode the Unicode string. Calling u.decode(enc) really
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            # means u.encode(sys.getdefaultencoding()).decode(enc). Since
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            # the Python encoding defaults to 'ascii', this fails if the
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            # translated string use non-ASCII characters.
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            encodingstr = pycompat.sysstr(encoding.encoding)
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            cache[message] = u.encode(encodingstr, "replace")
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        except LookupError:
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            # An unknown encoding results in a LookupError.
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            cache[message] = message
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    return cache[message]
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def _plain():
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    if ('HGPLAIN' not in encoding.environ
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        and 'HGPLAINEXCEPT' not in encoding.environ):
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        return False
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    exceptions = encoding.environ.get('HGPLAINEXCEPT', '').strip().split(',')
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    return 'i18n' not in exceptions
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if _plain():
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    _ = lambda message: message
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else:
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    _ = gettext