old_contents: """Base settings file; used by manage.py. All settings can be overridden via
  local_settings.py"""
  import os
  
  from django.utils.crypto import get_random_string
  
  
  INSTALLED_APPS = [
      'mptt',
      'haystack',
      'regcore',
      'regcore_read',
      'regcore_write',
  ]
  MIDDLEWARE_CLASSES = []
  
  SECRET_KEY = os.environ.get('DJANGO_SECRET_KEY', get_random_string(50))
  
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.sqlite3',
          'NAME': 'eregs.db'
      }
  }
  
  TEMPLATES = [{
      'BACKEND': 'django.template.backends.django.DjangoTemplates',
      'APP_DIRS': True,
  }]
  
  ROOT_URLCONF = 'regcore.urls'
  
  DEBUG = True
  
  # Configurable storage backends, keyed by data_type (e.g. regulations, diffs)
  # If a key is not set, defaults to regcore.db.django_models versions
  BACKENDS = {}
  
  ELASTIC_SEARCH_URLS = []
  ELASTIC_SEARCH_INDEX = 'eregs'
  
  HAYSTACK_CONNECTIONS = {
      'default': {
          'ENGINE': 'haystack.backends.simple_backend.SimpleEngine',
      }
  }
  
  LOGGING = {
      'version': 1,
      'disable_existing_loggers': False,
      'handlers': {
          'console': {
              'level': 'INFO',
              'class': 'logging.StreamHandler',
          }
      },
      'loggers': {
          '': {
              'handlers': ['console'],
              'level': 'INFO',
          },
          'django.request': {
              'handlers': ['console'],
              'propagate': False,
              'level': 'ERROR'
          }
      }
  }
  
  # Batch size used in `bulk_create`; defaults to a conservative value to avoid
  # hitting SQLite limits
  BATCH_SIZE = 50
  
  _envvars = ('HTTP_AUTH_USER', 'HTTP_AUTH_PASSWORD')
  for var in _envvars:
      globals()[var] = os.environ.get(var)
  
  try:
      from local_settings import *
  except ImportError:
      pass
  
new_contents: """Base settings file; used by manage.py. All settings can be overridden via
  local_settings.py"""
  import os
  
  from django.utils.crypto import get_random_string
  
  ALLOWED_HOSTS = [
      value for key, value in os.environ.items()
      if key.startswith('ALLOWED_HOST')
  ]
  
  INSTALLED_APPS = [
      'mptt',
      'haystack',
      'regcore',
      'regcore_read',
      'regcore_write',
  ]
  MIDDLEWARE_CLASSES = []
  
  SECRET_KEY = os.environ.get('DJANGO_SECRET_KEY', get_random_string(50))
  
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.sqlite3',
          'NAME': 'eregs.db'
      }
  }
  
  TEMPLATES = [{
      'BACKEND': 'django.template.backends.django.DjangoTemplates',
      'APP_DIRS': True,
  }]
  
  ROOT_URLCONF = 'regcore.urls'
  
  DEBUG = True
  
  # Configurable storage backends, keyed by data_type (e.g. regulations, diffs)
  # If a key is not set, defaults to regcore.db.django_models versions
  BACKENDS = {}
  
  ELASTIC_SEARCH_URLS = []
  ELASTIC_SEARCH_INDEX = 'eregs'
  
  HAYSTACK_CONNECTIONS = {
      'default': {
          'ENGINE': 'haystack.backends.simple_backend.SimpleEngine',
      }
  }
  
  LOGGING = {
      'version': 1,
      'disable_existing_loggers': False,
      'handlers': {
          'console': {
              'level': 'INFO',
              'class': 'logging.StreamHandler',
          }
      },
      'loggers': {
          '': {
              'handlers': ['console'],
              'level': 'INFO',
          },
          'django.request': {
              'handlers': ['console'],
              'propagate': False,
              'level': 'ERROR'
          }
      }
  }
  
  # Batch size used in `bulk_create`; defaults to a conservative value to avoid
  # hitting SQLite limits
  BATCH_SIZE = 50
  
  _envvars = ('HTTP_AUTH_USER', 'HTTP_AUTH_PASSWORD')
  for var in _envvars:
      globals()[var] = os.environ.get(var)
  
  try:
      from local_settings import *
  except ImportError:
      pass
  
subject: Allow environment config for ALLOWED_HOSTS.