Add option to load settings from installed apps

[Jannis Leidel]

It might be useful for reusable apps to automatically load settings from installed apps.

The attached patch enables app authors to put a settings.py file in their app distributions.
These app settings are automatically loaded (except if there is already a setting with the same name) and can be overridden by project settings.

[Jannis Leidel]

App settings, first try

[Thomas Güttler]

Sorry, but I think this is a bad idea. For what kind of settings do you want to
use this application specific settings file?

It would be better to have a common place to store application specific settings somewhere
else.

I store them in settings.APPNAME. Example: settings.APPNAME.default_color='green'.

The app specific settings get loaded like this:

# settings.py
import APPNAME

[Jannis Leidel]

Yeah, this is what I use in my Django "projects" to have local settings, pretty basic of course:

try:
    from local_settings import *
except ImportError:
    pass

I figured it might be good to have app-based settings as defaults that can be overridden by other users if required and wrote this snippet: ​http://www.djangosnippets.org/snippets/573/ Which is ugly.

But since the INSTALLED_APPS and app loading mechanism is redesigned anyway, the new App objects might be the right place for having these default settings. What do you think?

[Jannis Leidel]

Ah, here is what was discussed during the Pycon sprint: InstalledAppsRevision