Synnefo

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from optparse import make_option

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

from synnefo.db.models import Backend

class Command(BaseCommand):

    help = "List backends"

    option_list = BaseCommand.option_list + (

        make_option('-c',

            action='store_true',

            dest='csv',

            default=False,

            help="Use pipes to separate values"),

        )

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

        if args:

            raise CommandError("Command doesn't accept any arguments")

        backends = Backend.objects.order_by('id')

        labels = ('id', 'clustername', 'port', 'username', "vm's", 'drained',

                  'offline')

        columns = (3, 50, 5, 10, 4, 6, 6)

        if not options['csv']:

            line = ' '.join(l.rjust(w) for l, w in zip(labels, columns))

            sep = '-' * len(line)

            self.stdout.write(sep + '\n')

            self.stdout.write(line + '\n')

            self.stdout.write(sep + '\n')

        for backend in backends:

            id = str(backend.id)

            vms = str(backend.virtual_machines.filter(deleted=False).count())

            fields = (id, backend.clustername, str(backend.port),

                      backend.username, vms, str(backend.drained),

                      str(backend.offline))

            if options['csv']:

                line = '|'.join(fields)

            else:

                line = ' '.join(f.rjust(w) for f, w in zip(fields, columns))

            self.stdout.write(line.encode('utf8') + '\n')