Fixed #8280 -- Allowed management command discovery for eggs

import collections

from importlib import import_module

import os

import pkgutil

import sys

import django

    Returns an empty list if no commands are defined.

    """

    command_dir = os.path.join(management_dir, 'commands')

    try:

        return [f[:-3] for f in os.listdir(command_dir)

                if not f.startswith('_') and f.endswith('.py')]

    except OSError:

        return []

    # Workaround for a Python 3.2 bug with pkgutil.iter_modules

    sys.path_importer_cache.pop(command_dir, None)

    return [name for _, name, is_pkg in pkgutil.iter_modules([command_dir])

            if not is_pkg and not name.startswith('_')]

def load_command_class(app_name, name):

* Database connections are now always closed after a management command called

  from the command line has finished doing its job.

* Commands from alternate package formats like eggs are now also discovered.

* :djadmin:`dumpdata` now has the option :djadminopt:`--output` which allows

  specifying the file to which the serialized data is written.

import os

from django.apps import apps

from django.db import connection

from django.core import management

from django.core.management import BaseCommand, CommandError

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

from django.core.management.utils import find_command, popen_wrapper

from django.test import SimpleTestCase, ignore_warnings

from django.test.utils import captured_stderr, captured_stdout

from django.test.utils import captured_stderr, captured_stdout, extend_sys_path

from django.utils import translation

from django.utils.deprecation import RemovedInDjango20Warning

from django.utils._os import upath

from django.utils.six import StringIO

            if current_path is not None:

                os.environ['PATH'] = current_path

    def test_discover_commands_in_eggs(self):

        """

        Test that management commands can also be loaded from Python eggs.

        """

        egg_dir = '%s/eggs' % os.path.dirname(upath(__file__))

        egg_name = '%s/basic.egg' % egg_dir

        with extend_sys_path(egg_name):

            with self.settings(INSTALLED_APPS=['commandegg']):

                cmds = find_commands(os.path.join(apps.get_app_config('commandegg').path, 'management'))

        self.assertEqual(cmds, ['eggcommand'])

    def test_call_command_option_parsing(self):

        """

        When passing the long option name to call_command, the available option