A quick and dirty way to add backward-compatible app config to Django app (for Django 1.7 support)

create_dj17_app_config.py

# -*- coding: utf-8 -*-
#! /usr/bin/env python
import os
import sys
import click


DEFAULT_CONFIG_TEMPLATE = "default_app_config = '{module_path}.{config_module}.{app_name}AppConfig'"  # noqa


APPCONFIG_TEMPLATE = """# -*- coding: utf-8 -*-
from django.apps import AppConfig

class {app_name}AppConfig(AppConfig):
    name = '{module_path}'
    verbose_name = '{app_verbose_name}'
"""


@click.command()
@click.option('--project-dir')
@click.option('--module-name', default='apps')
@click.option('--dry-run', is_flag=True)
@click.option('--force', is_flag=True)
@click.argument('apps', nargs=-1)
def create_app_config(project_dir, module_name, dry_run, force, apps):
    print "APPS", apps
    for app_module in apps:

        if '.' in app_module:
            __, app_label = app_module.rsplit('.', 1)
            app_dir = app_module.replace('.', '/')
        else:
            app_label = app_dir = app_module

        if project_dir:
            app_dir = os.path.join(project_dir, app_dir)

        if not os.path.exists(app_dir):
            print "ERROR: app directory doesn't exist"
            sys.exit(2)

        app_config = os.path.join(app_dir, "{}.py".format(module_name))

        name_segments = map(lambda a: a.capitalize(), app_label.split('_'))
        app_name = ''.join(name_segments)
        app_verbose_name = ' '.join(name_segments)

        app_config_content = APPCONFIG_TEMPLATE.format(
            app_name=app_name, module_path=app_module,
            app_verbose_name=app_verbose_name)

        if dry_run:
            print "=" * len(app_module)
            print app_module
            print "=" * len(app_module)
            print
            print "APP DIR:", app_dir
            print "APP LABEL:", app_label
            print
            print app_config_content
            print

            continue

        if not os.path.exists(app_config) or force:
            print "Adding app config:", app_config
            with open(app_config, 'w') as app_file:
                app_file.write(app_config_content)

        init_path = os.path.join(app_dir, '__init__.py')

        default_config_set = False
        is_empty = True

        if os.path.exists(init_path):
            with open(init_path) as init_file:
                for number, line in enumerate(init_file):
                    if 'default_app_config' in line:
                        default_config_set = True
                        break

                    is_empty = number < 1

        if not default_config_set:
            print "Adding default config to", init_path
            with open(init_path, 'a') as init_file:
                if not is_empty:
                    init_file.write('\n\n')
                init_file.write(DEFAULT_CONFIG_TEMPLATE.format(
                    module_path=app_module, app_name=app_name,
                    config_module=module_name))


if __name__ == '__main__':
    create_app_config()