diff --git a/monascaclient/openstack/common/gettextutils.py b/monascaclient/openstack/common/gettextutils.py deleted file mode 100644 index c552853..0000000 --- a/monascaclient/openstack/common/gettextutils.py +++ /dev/null @@ -1,374 +0,0 @@ -# vim: tabstop=4 shiftwidth=4 softtabstop=4 - -# Copyright 2012 Red Hat, Inc. -# Copyright 2013 IBM Corp. -# (C) Copyright 2014-2015 Hewlett Packard Enterprise Development Company LP -# All Rights Reserved. -# -# Licensed under the Apache License, Version 2.0 (the "License"); you may -# not use this file except in compliance with the License. You may obtain -# a copy of the License at -# -# http://www.apache.org/licenses/LICENSE-2.0 -# -# Unless required by applicable law or agreed to in writing, software -# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT -# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the -# License for the specific language governing permissions and limitations -# under the License. - -""" -gettext for openstack-common modules. - -Usual usage in an openstack.common module: - - from monascaclient.openstack.common.gettextutils import _ -""" - -import copy -import gettext -import logging -import os -import re -try: - import UserString as _userString -except ImportError: - import collections as _userString - -from babel import localedata -import six - -_localedir = os.environ.get('monascaclient'.upper() + '_LOCALEDIR') -_t = gettext.translation('monascaclient', localedir=_localedir, fallback=True) - -_AVAILABLE_LANGUAGES = {} -USE_LAZY = False - - -def enable_lazy(): - """Convenience function for configuring _() to use lazy gettext - - Call this at the start of execution to enable the gettextutils._ - function to use lazy gettext functionality. This is useful if - your project is importing _ directly instead of using the - gettextutils.install() way of importing the _ function. - """ - global USE_LAZY - USE_LAZY = True - - -def _(msg): - if USE_LAZY: - return Message(msg, 'monascaclient') - else: - if six.PY3: - return _t.gettext(msg) - return _t.ugettext(msg) - - -def install(domain, lazy=False): - """Install a _() function using the given translation domain. - - Given a translation domain, install a _() function using gettext's - install() function. - - The main difference from gettext.install() is that we allow - overriding the default localedir (e.g. /usr/share/locale) using - a translation-domain-specific environment variable (e.g. - NOVA_LOCALEDIR). - - :param domain: the translation domain - :param lazy: indicates whether or not to install the lazy _() function. - The lazy _() introduces a way to do deferred translation - of messages by installing a _ that builds Message objects, - instead of strings, which can then be lazily translated into - any available locale. - """ - if lazy: - # NOTE(mrodden): Lazy gettext functionality. - # - # The following introduces a deferred way to do translations on - # messages in OpenStack. We override the standard _() function - # and % (format string) operation to build Message objects that can - # later be translated when we have more information. - # - # Also included below is an example LocaleHandler that translates - # Messages to an associated locale, effectively allowing many logs, - # each with their own locale. - - def _lazy_gettext(msg): - """Create and return a Message object. - - Lazy gettext function for a given domain, it is a factory method - for a project/module to get a lazy gettext function for its own - translation domain (i.e. nova, glance, cinder, etc.) - - Message encapsulates a string so that we can translate - it later when needed. - """ - return Message(msg, domain) - - from six import moves - moves.builtins.__dict__['_'] = _lazy_gettext - else: - localedir = '%s_LOCALEDIR' % domain.upper() - if six.PY3: - gettext.install(domain, - localedir=os.environ.get(localedir)) - else: - gettext.install(domain, - localedir=os.environ.get(localedir), - unicode=True) - - -class Message(_userString.UserString, object): - """Class used to encapsulate translatable messages.""" - def __init__(self, msg, domain): - # _msg is the gettext msgid and should never change - self._msg = msg - self._left_extra_msg = '' - self._right_extra_msg = '' - self._locale = None - self.params = None - self.domain = domain - - @property - def data(self): - # NOTE(mrodden): this should always resolve to a unicode string - # that best represents the state of the message currently - - localedir = os.environ.get(self.domain.upper() + '_LOCALEDIR') - if self.locale: - lang = gettext.translation(self.domain, - localedir=localedir, - languages=[self.locale], - fallback=True) - else: - # use system locale for translations - lang = gettext.translation(self.domain, - localedir=localedir, - fallback=True) - - if six.PY3: - ugettext = lang.gettext - else: - ugettext = lang.ugettext - - full_msg = (self._left_extra_msg + - ugettext(self._msg) + - self._right_extra_msg) - - if self.params is not None: - full_msg = full_msg % self.params - - return six.text_type(full_msg) - - @property - def locale(self): - return self._locale - - @locale.setter - def locale(self, value): - self._locale = value - if not self.params: - return - - # This Message object may have been constructed with one or more - # Message objects as substitution parameters, given as a single - # Message, or a tuple or Map containing some, so when setting the - # locale for this Message we need to set it for those Messages too. - if isinstance(self.params, Message): - self.params.locale = value - return - if isinstance(self.params, tuple): - for param in self.params: - if isinstance(param, Message): - param.locale = value - return - if isinstance(self.params, dict): - for param in self.params.values(): - if isinstance(param, Message): - param.locale = value - - def _save_dictionary_parameter(self, dict_param): - full_msg = self.data - # look for %(blah) fields in string; - # ignore %% and deal with the - # case where % is first character on the line - keys = re.findall('(?:[^%]|^)?%\((\w*)\)[a-z]', full_msg) - - # if we don't find any %(blah) blocks but have a %s - if not keys and re.findall('(?:[^%]|^)%[a-z]', full_msg): - # apparently the full dictionary is the parameter - params = copy.deepcopy(dict_param) - else: - params = {} - for key in keys: - try: - params[key] = copy.deepcopy(dict_param[key]) - except TypeError: - # cast uncopyable thing to unicode string - params[key] = six.text_type(dict_param[key]) - - return params - - def _save_parameters(self, other): - # we check for None later to see if - # we actually have parameters to inject, - # so encapsulate if our parameter is actually None - if other is None: - self.params = (other, ) - elif isinstance(other, dict): - self.params = self._save_dictionary_parameter(other) - else: - # fallback to casting to unicode, - # this will handle the problematic python code-like - # objects that cannot be deep-copied - try: - self.params = copy.deepcopy(other) - except TypeError: - self.params = six.text_type(other) - - return self - - # overrides to be more string-like - def __unicode__(self): - return self.data - - def __str__(self): - if six.PY3: - return self.__unicode__() - return self.data.encode('utf-8') - - def __getstate__(self): - to_copy = ['_msg', '_right_extra_msg', '_left_extra_msg', - 'domain', 'params', '_locale'] - new_dict = self.__dict__.fromkeys(to_copy) - for attr in to_copy: - new_dict[attr] = copy.deepcopy(self.__dict__[attr]) - - return new_dict - - def __setstate__(self, state): - for (k, v) in state.items(): - setattr(self, k, v) - - # operator overloads - def __add__(self, other): - copied = copy.deepcopy(self) - copied._right_extra_msg += other.__str__() - return copied - - def __radd__(self, other): - copied = copy.deepcopy(self) - copied._left_extra_msg += other.__str__() - return copied - - def __mod__(self, other): - # do a format string to catch and raise - # any possible KeyErrors from missing parameters - self.data % other - copied = copy.deepcopy(self) - return copied._save_parameters(other) - - def __mul__(self, other): - return self.data * other - - def __rmul__(self, other): - return other * self.data - - def __getitem__(self, key): - return self.data[key] - - def __getslice__(self, start, end): - return self.data.__getslice__(start, end) - - def __getattribute__(self, name): - # NOTE(mrodden): handle lossy operations that we can't deal with yet - # These override the UserString implementation, since UserString - # uses our __class__ attribute to try and build a new message - # after running the inner data string through the operation. - # At that point, we have lost the gettext message id and can just - # safely resolve to a string instead. - ops = ['capitalize', 'center', 'decode', 'encode', - 'expandtabs', 'ljust', 'lstrip', 'replace', 'rjust', 'rstrip', - 'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill'] - if name in ops: - return getattr(self.data, name) - else: - return _userString.UserString.__getattribute__(self, name) - - -def get_available_languages(domain): - """Lists the available languages for the given translation domain. - - :param domain: the domain to get languages for - """ - if domain in _AVAILABLE_LANGUAGES: - return copy.copy(_AVAILABLE_LANGUAGES[domain]) - - localedir = '%s_LOCALEDIR' % domain.upper() - find = lambda x: gettext.find(domain, - localedir=os.environ.get(localedir), - languages=[x]) - - # NOTE(mrodden): en_US should always be available (and first in case - # order matters) since our in-line message strings are en_US - language_list = ['en_US'] - # NOTE(luisg): Babel <1.0 used a function called list(), which was - # renamed to locale_identifiers() in >=1.0, the requirements master list - # requires >=0.9.6, uncapped, so defensively work with both. We can remove - # this check when the master list updates to >=1.0, and update all projects - list_identifiers = (getattr(localedata, 'list', None) or - getattr(localedata, 'locale_identifiers')) - locale_identifiers = list_identifiers() - for i in locale_identifiers: - if find(i) is not None: - language_list.append(i) - _AVAILABLE_LANGUAGES[domain] = language_list - return copy.copy(language_list) - - -def get_localized_message(message, user_locale): - """Gets a localized version of the given message in the given locale. - - If the message is not a Message object the message is returned as-is. - If the locale is None the message is translated to the default locale. - - :returns: the translated message in unicode, or the original message if - it could not be translated - """ - translated = message - if isinstance(message, Message): - original_locale = message.locale - message.locale = user_locale - translated = six.text_type(message) - message.locale = original_locale - return translated - - -class LocaleHandler(logging.Handler): - """Handler that can have a locale associated to translate Messages. - - A quick example of how to utilize the Message class above. - LocaleHandler takes a locale and a target logging.Handler object - to forward LogRecord objects to after translating the internal Message. - """ - - def __init__(self, locale, target): - """Initialize a LocaleHandler - - :param locale: locale to use for translating messages - :param target: logging.Handler object to forward - LogRecord objects to after translation - """ - logging.Handler.__init__(self) - self.locale = locale - self.target = target - - def emit(self, record): - if isinstance(record.msg, Message): - # set the locale and resolve to a string - record.msg.locale = self.locale - - self.target.emit(record)