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

from django.contrib.auth.models import User

import getpass

class Command(BaseCommand):

    help = "Clone of the UNIX program ``passwd'', for django.contrib.auth."

    requires_model_validation = False

    def handle(self, *args, **options):

        if len(args) > 1:

            raise CommandError("need exactly one or zero arguments for username")

        if args:

            username, = args

        else:

            username = getpass.getuser()

        try:

            u = User.objects.get(username=username)

        except User.DoesNotExist:

            raise CommandError("user %s does not exist" % username)

        print "Changing password for user", u.username

        p1 = p2 = ""

        while "" in (p1, p2) or p1 != p2:

            p1 = getpass.getpass()

            p2 = getpass.getpass("Password (again): ")

            if p1 != p2:

                print "Passwords do not match, try again"

            elif "" in (p1, p2):

                raise CommandError("aborted")

        u.set_password(p1)

        u.save()

        return "Password changed successfully for user", u.username