Fixed #25784 -- Prevented an exception on collectstatic help

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

from django.core.management.color import no_style

from django.utils.encoding import smart_text

from django.utils.functional import cached_property

from django.utils.six.moves import input

        self.post_processed_files = []

        self.storage = staticfiles_storage

        self.style = no_style()

    @cached_property

    def local(self):

        try:

            self.storage.path('')

        except NotImplementedError:

            self.local = False

        else:

            self.local = True

            return False

        return True

    def add_arguments(self, parser):

        parser.add_argument('--noinput', '--no-input',

import tempfile

import unittest

from admin_scripts.tests import AdminScriptTestCase

from django.conf import settings

from django.contrib.staticfiles import storage

from django.contrib.staticfiles.management.commands import collectstatic

            storage.staticfiles_storage = staticfiles_storage

class TestCollectionHelpSubcommand(AdminScriptTestCase):

    @override_settings(STATIC_ROOT=None)

    def test_missing_settings_dont_prevent_help(self):

        """

        Even if the STATIC_ROOT setting is not set, one can still call the

        `manage.py help collectstatic` command.

        """

        self.write_settings('settings.py', apps=['django.contrib.staticfiles'])

        out, err = self.run_manage(['help', 'collectstatic'])

        self.assertNoOutput(err)

class TestCollection(CollectionTestCase, TestDefaults):

    """

    Test ``collectstatic`` management command.