import os

import sys

from optparse import make_option

from django.core.management.base import BaseCommand, CommandError

def compile_messages(locale=None):

    basedirs = [os.path.join('conf', 'locale'), 'locale']

    if os.environ.get('DJANGO_SETTINGS_MODULE'):

        from django.conf import settings

        basedirs.extend(settings.LOCALE_PATHS)

    # Gather existing directories.

    basedirs = set(map(os.path.abspath, filter(os.path.isdir, basedirs)))

    if not basedirs:

        raise CommandError("This script should be run from the Django SVN tree or your project or app tree, or with the settings module specified.")

    for basedir in basedirs:

        if locale:

            basedir = os.path.join(basedir, locale, 'LC_MESSAGES')

        for dirpath, dirnames, filenames in os.walk(basedir):

            for f in filenames:

                if f.endswith('.po'):

                    sys.stderr.write('processing file %s in %s\n' % (f, dirpath))

                    pf = os.path.splitext(os.path.join(dirpath, f))[0]

                    # Store the names of the .mo and .po files in an environment

                    # variable, rather than doing a string replacement into the

                    # command, so that we can take advantage of shell quoting, to

                    # quote any malicious characters/escaping.

                    # See http://cyberelk.net/tim/articles/cmdline/ar01s02.html

                    os.environ['djangocompilemo'] = pf + '.mo'

                    os.environ['djangocompilepo'] = pf + '.po'

                    if sys.platform == 'win32': # Different shell-variable syntax

                        cmd = 'msgfmt --check-format -o "%djangocompilemo%" "%djangocompilepo%"'

                    else:

                        cmd = 'msgfmt --check-format -o "$djangocompilemo" "$djangocompilepo"'

                    os.system(cmd)

class Command(BaseCommand):

    option_list = BaseCommand.option_list + (

        make_option('--locale', '-l', dest='locale',

            help='The locale to process. Default is to process all.'),

    )

    help = 'Compiles .po files to .mo files for use with builtin gettext support.'

    requires_model_validation = False

    can_import_settings = False

    def handle(self, **options):

        locale = options.get('locale')

        compile_messages(locale)