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File name : check-language-support

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#! /usr/bin/python3

from __future__ import print_function

import sys
import re
import os.path
import locale
from optparse import OptionParser
from gettext import gettext as _

import language_support_pkgs

if __name__ == "__main__":
    try:
        locale.setlocale(locale.LC_ALL, '')
    except locale.Error:
        # We might well be running from the installer before locales have
        # been properly configured.
        pass

parser = OptionParser()
    parser.add_option("-l", "--language",
            help=_("target language code"))
    parser.add_option("-d", "--datadir",
            default="/usr/share/language-selector/",
            help=_("alternative datadir"))
    parser.add_option("-p", "--package", default=None, help=_("check for the given package(s) only -- separate packagenames by comma"))
    parser.add_option("-a", "--all", action='store_true', default=False,
                      help=_("output all available language support packages for all languages"))
    parser.add_option("--show-installed",
            action='store_true', default=False,
            help=_("show installed packages as well as missing ones"))
    (options, args) = parser.parse_args()

# sanity check for language code
    if (options.language and 
            not re.match('^([a-z]{2,3}(_[A-Z]{2})?(@[a-z]+)?|(zh-han[st]))$', options.language)):
        print("Error: Unsupported language code format.\n\
               Supported formats: 'll' or 'lll'\n\
               'll_CC' or 'lll_CC'\n\
               'll@variant' or 'lll@variant'\n\
               'll_CC@variant' or 'lll_CC@variant'\n\
               Also supported are 'zh-hans' and 'zh-hant'.",
               file=sys.stderr)
        sys.exit(1)

if options.datadir:
        pkg_depends = os.path.join(options.datadir, 'data', 'pkg_depends')
    else:
        pkg_depends = None

ls = language_support_pkgs.LanguageSupport(None, pkg_depends)

if options.all:
        missing = set()
        ls._countries_for_lang('de') # initialize cache
        for lang, countries in ls.lang_country_map.items():
            for country in countries:
                missing.update(ls.by_locale('%s_%s' % (lang, country), options.show_installed))
    elif options.package:
        missing = set()
        for package in options.package.split(','):
            if options.language:
                missing.update(ls.by_package_and_locale(package, options.language, options.show_installed))
            else:
                missing.update(ls.by_package(package, options.show_installed))
    elif options.language:
        missing = set(ls.by_locale(options.language, options.show_installed))
    else:
        missing = ls.missing(options.show_installed)

print(' '.join(sorted(missing)))