issue2551182 - ... allow loading values from external file. flake8 cleanups Secrets (passwords, secrets) can specify a file using file:// or file:///. The first line of the file is used as the secret. This allows committing config.ini to a VCS. Following settings are changed: [tracker] secret_key [tracker] jwt_secret [rdbms] password [mail] password details: in roundup/configuration.py: Defined SecretMandatoryOptions and SecretNullableOptions. Converted all secret keys and password to one of the above. Also if [mail] username is defined but [mail] password is not it throws an error at load. Cleaned up a couple of methods whose call signature included: def ...(..., settings={}): settings=None and it is set to empty dict inside the method. Also replace exception.message with str(exception) for python3 compatibility. in test/test_config: changed munge_configini to support changing only within a section, replacing keyword text.

Debugging Aids
--------------

Try turning on logging of DEBUG level messages. This may be done a number
of ways, depending on what it is you're testing:

1. If you're testing the database unit tests, then set the environment
   variable ``LOGGING_LEVEL=DEBUG``. This may be done like so:

    LOGGING_LEVEL=DEBUG python -m pytest test/

   This variable replaces the older HYPERDBDEBUG environment var.

2. If you're testing a particular tracker, then set the logging level in
   your tracker's ``config.ini``.

SENDMAILDEBUG
=============

Set to a filename and roundup will write each email message
that it sends to that file instead to the internet. 
This environment variable is independent of the python -O flag.