manage.py

#!/usr/bin/env python
import os
import sys

# On the server, we're started with a command like
#
#   VENV/bin/python manage.py run_gunicorn -c path/to/gunicorn_config.py
#
# so it's up to manage.py to pick what Django settings to use.


if __name__ == "__main__":
    settings = None
    if 'IS_PRODUCTION' in os.environ:
        # We're on a deployed server if the var "IS_PRODUCTION" exists, with any value.
        # The value tells us if we're production or staging, so we
        # can use the appropriate settings. The value is set by Chef
        # using Ruby, so True is spelled 'true'.
        if os.environ['IS_PRODUCTION'] == 'true':
            settings = "production"
        else:
            settings = "staging"
    elif 'test' in sys.argv:
        # Running tests - use test-specific settings
        settings = "test"
    else:
        # Try to load pycon.settings.local and fail with a useful message
        # if that doesn't work.
        settings = "default"

    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pycon.settings.%s" % settings)

    from django.core.management import execute_from_command_line

    execute_from_command_line(sys.argv)