This is an unfinished managment command that I use when customising one of Oscar's core apps. It simply copies over all the files of the app (excluding subdirectories) and leaves the rest to you. I'd like to improve it at some point and make it part of Oscar but I didn't have the time for that yet. The command in action might look like this: ```…

oscar_override_app.py

import os
import imp
import shutil
import pkgutil
import logging

from optparse import make_option

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

from oscar import get_core_apps

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger('oscar_override_app')


class Command(BaseCommand):
    args = '<oscar_app> <your_app>'
    help = 'For testing the content of order emails'
    option_list = BaseCommand.option_list + (
        make_option('--copy-migrations',
            action='store_true',
            dest='copy_migrations',
            default=False,
            help='Copies the migrations from Oscar instead of creating '
                 'generating an initial migration.'),
        #TODO: need additional options
        #   1) overwrite existing files in specified "new_app"
        #   2) recursively add modules included int he package
    )

    def handle(self, *args, **options):
        try:
            oscar_app, new_app = args
        except ValueError:
            raise CommandError(
                'Overwriting an app requires an app and a target name'
            )

        oscar_app = 'oscar.apps.%s' % oscar_app
        if oscar_app not in get_core_apps():
            raise CommandError(
                'Oscar app %s could not be found' % oscar_app
            )

        parts = new_app.split('.')
        path = None

        for part in parts:
            try:
                f, path, desc = imp.find_module(part, path and [path] or None)
            except ImportError:
                path = os.path.join(path, part)
                if not os.path.exists(path):
                    os.mkdir(path)
                # touch the init
                init = os.path.join(path, '__init__.py')
                if not os.path.exists(init):
                    open(init, 'w').close()

        new_app_path = path

        oscar, module = oscar_app.split('.', 1)
        f, path, desc = imp.find_module('oscar', None)
        path = os.path.join(path, module.replace('.', '/'))
        for loader, name, ispkg in pkgutil.walk_packages([path]):
            if ispkg:
                #TODO this need to handle sub-packages at some point
                logger.info("skipping package '%s'", name)
                continue

            if name == "abstract_models":
                continue
            oscar_file = '%s/%s.py' % (path, name)
            new_file = '%s/%s.py' % (new_app_path, name)

            if not os.path.exists(new_file):
                shutil.copy(oscar_file, new_file)