# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2012 Red Hat, Inc.
-# All Rights Reserved.
# Copyright 2013 IBM Corp.
+# 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
import re
import UserString
+from babel import localedata
import six
_localedir = os.environ.get('neutron'.upper() + '_LOCALEDIR')
_t = gettext.translation('neutron', localedir=_localedir, fallback=True)
+_AVAILABLE_LANGUAGES = []
+
def _(msg):
return _t.ugettext(msg)
-def install(domain):
+def install(domain, lazy=False):
"""Install a _() function using the given translation domain.
Given a translation domain, install a _() function using gettext's
overriding the default localedir (e.g. /usr/share/locale) using
a translation-domain-specific environment variable (e.g.
NOVA_LOCALEDIR).
- """
- gettext.install(domain,
- localedir=os.environ.get(domain.upper() + '_LOCALEDIR'),
- unicode=True)
-
-
-"""
-Lazy gettext functionality.
-
-The following is an attempt to introduce a deferred way
-to do translations on messages in OpenStack. We attempt to
-override the standard _() function and % (format string) operation
-to build Message objects that can later be translated when we have
-more information. Also included is an example LogHandler that
-translates Messages to an associated locale, effectively allowing
-many logs, each with their own locale.
-"""
-
-def get_lazy_gettext(domain):
- """Assemble and return a lazy gettext function for a given domain.
-
- Factory method for a project/module to get a lazy gettext function
- for its own translation domain (i.e. nova, glance, cinder, etc.)
+ :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.
"""
-
- def _lazy_gettext(msg):
- """Create and return a Message object.
-
- Message encapsulates a string so that we can translate it later when
- needed.
- """
- return Message(msg, domain)
-
- return _lazy_gettext
+ 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)
+
+ import __builtin__
+ __builtin__.__dict__['_'] = _lazy_gettext
+ else:
+ localedir = '%s_LOCALEDIR' % domain.upper()
+ gettext.install(domain,
+ localedir=os.environ.get(localedir),
+ unicode=True)
class Message(UserString.UserString, object):
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 _AVAILABLE_LANGUAGES:
+ return _AVAILABLE_LANGUAGES
+
+ 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
+ _AVAILABLE_LANGUAGES.append('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 all projects udpate
+ 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:
+ _AVAILABLE_LANGUAGES.append(i)
+ return _AVAILABLE_LANGUAGES
+
+
+def get_localized_message(message, user_locale):
+ """Gets a localized version of the given message in the given locale."""
+ if (isinstance(message, Message)):
+ if user_locale:
+ message.locale = user_locale
+ return unicode(message)
+ else:
+ return message
+
+
class LocaleHandler(logging.Handler):
"""Handler that can have a locale associated to translate Messages.
Code Review / openstack-build / neutron-build.git / commitdiff