django_settings_file.py

"""
The HOSTMAP variable is a dictionary of lists. The keys represent
roles of a server, the values represent the hostnames of machines that
fill those roles. If you are reading this, you likely know what you're
doing. If you don't know what you're doing, you probably want to put
your hostname into local_dev. Ensure it has a comma at the end, and
the hostname is a string.
 
You can get your hostname by typing `hostname` into a terminal.

This file will import *two* settings files, in addition to base_settings.py. First,
the key(settings_local_dev.py) - and then, the settings file for your machine specifically:
(settings_lifttop.py)
"""
HOSTMAP = {
    'local_dev': [
        'Lifttop.local',
        ],
    'production':[
        ],
    }
 
 
import socket
from django.utils import importlib

def update_current_settings(file_name):
    """
    Given a filename, this function will insert all variables and
    functions in ALL_CAPS into the global scope.
    """
    new_settings = importlib.import_module(file_name)
    for k, v in new_settings.__dict__.items():
        if k.upper() == k:
            globals().update({k:v})
 
current_hostname = socket.gethostname()
to_load = []
 
for k, v in HOSTMAP.items():
    if current_hostname in v:
        to_load.append(k)
        to_load.append(current_hostname.split('.')[0]) # so that we import foo.settings, not foo.local.settings
 
update_current_settings('settings.base_settings')
for x in to_load:
    try:
        update_current_settings('settings.settings_%s' % x.lower())
    except ImportError, e:
        print "Error importing %s:%s" % (x, e)