old_contents: # Django settings for sal project.
  from sal.system_settings import *
  from sal.settings_import import *
  
  DATABASES = {
      'default': {
          # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
          'ENGINE': 'django.db.backends.sqlite3',
          # Or path to database file if using sqlite3.
          'NAME': os.path.join(PROJECT_DIR, 'db/sal.db'),
          'USER': '',                      # Not used with sqlite3.
          'PASSWORD': '',                  # Not used with sqlite3.
          'HOST': '',                      # Set to empty string for localhost. Not used with sqlite3.
          'PORT': '',                      # Set to empty string for default. Not used with sqlite3.
      }
  }
  
  # Memcached
  if 'MEMCACHED_PORT_11211_TCP_ADDR' in os.environ:
      CACHES = {
          'default': {
              'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
              'LOCATION': [
                  f"{os.environ['MEMCACHED_PORT_11211_TCP_ADDR']}:"
                  f"{os.environ['MEMCACHED_PORT_11211_TCP_PORT']}", '11211'],
              ]
          }
      }
  
  # PG Database
  host = None
  port = None
  
  if 'DB_USER' in os.environ:
      if 'DB_HOST' in os.environ:
          host = os.environ.get('DB_HOST')
          port = os.environ.get('DB_PORT', '5432')
  
      elif 'DB_PORT_5432_TCP_ADDR' in os.environ:
          host = os.environ.get('DB_PORT_5432_TCP_ADDR')
          port = os.environ.get('DB_PORT_5432_TCP_PORT', '5432')
  
      else:
          host = 'db'
          port = '5432'
  
  if host and port:
      DATABASES = {
          'default': {
              'ENGINE': 'django.db.backends.postgresql_psycopg2',
              'NAME': os.environ['DB_NAME'],
              'USER': os.environ['DB_USER'],
              'PASSWORD': os.environ['DB_PASS'],
              'HOST': host,
              'PORT': port,
          }
      }
  
new_contents: # Django settings for sal project.
  from sal.system_settings import *
  from sal.settings_import import *
  
  
  DATABASES = {
      'default': {
          # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
          'ENGINE': 'django.db.backends.sqlite3',
          # Or path to database file if using sqlite3.
          'NAME': os.path.join(PROJECT_DIR, 'db/sal.db'),
          'USER': '',  # Not used with sqlite3.
          'PASSWORD': '',  # Not used with sqlite3.
          'HOST': '',  # Set to empty string for localhost. Not used with sqlite3.
          'PORT': '',  # Set to empty string for default. Not used with sqlite3.
      }
  }
  
  # Memcached
  if 'MEMCACHED_PORT_11211_TCP_ADDR' in os.environ:
      addr = os.environ['MEMCACHED_PORT_11211_TCP_ADDR']
      port = os.environ['MEMCACHED_PORT_11211_TCP_PORT']
      CACHES = {
          'default': {
              'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
              'LOCATION': [f"{addr}:{port}", '11211']
          }
      }
  
  # PG Database
  host = None
  port = None
  
  if 'DB_USER' in os.environ:
      if 'DB_HOST' in os.environ:
          host = os.environ.get('DB_HOST')
          port = os.environ.get('DB_PORT', '5432')
  
      elif 'DB_PORT_5432_TCP_ADDR' in os.environ:
          host = os.environ.get('DB_PORT_5432_TCP_ADDR')
          port = os.environ.get('DB_PORT_5432_TCP_PORT', '5432')
  
      else:
          host = 'db'
          port = '5432'
  
  if host and port:
      DATABASES = {
          'default': {
              'ENGINE': 'django.db.backends.postgresql_psycopg2',
              'NAME': os.environ['DB_NAME'],
              'USER': os.environ['DB_USER'],
              'PASSWORD': os.environ['DB_PASS'],
              'HOST': host,
              'PORT': port,
          }
      }
  
subject: Clean up lint issues.