def smart_gettext_and_install(domain, localedir, languages,
fallback=False, unicode=False):
try:
t = gettext.translation(domain, localedir, languages=languages,
fallback=fallback)
except Exception, e:
# if we failed to find the language, fetch it from the web async-style
running_count = 0
running_deferred = {}
# Get some reasonable defaults for arguments that were not supplied
if languages is None:
languages = []
for envar in ('LANGUAGE', 'LC_ALL', 'LC_MESSAGES', 'LANG'):
val = os.environ.get(envar)
if val:
languages = val.split(':')
break
if 'C' not in languages:
languages.append('C')
# now normalize and expand the languages
nelangs = []
for lang in languages:
for nelang in gettext._expand_lang(lang):
if nelang not in nelangs:
nelangs.append(nelang)
languages = nelangs
for lang in languages:
d = ThreadedDeferred(None, get_language, lang)
def translate_and_install(r, td=d):
running_deferred.pop(td)
# only let the last one try to install
if len(running_deferred) == 0:
t = gettext.translation(domain, localedir,
languages=languages,
fallback=True)
t.install(unicode)
def failed(e, tlang=lang, td=d):
if td in running_deferred:
running_deferred.pop(td)
# don't raise an error, just continue untranslated
sys.stderr.write('Could not find translation for language "%s"\n' %
tlang)
#traceback.print_exc(e)
d.addCallback(translate_and_install)
d.addErrback(failed)
# accumulate all the deferreds first
running_deferred[d] = 1
# start them all, the last one finished will install the language
for d in running_deferred:
d.start()
return
