Changing the Logging Output
Gungraun uses env_logger and
the default logging level WARN. To set the logging level to something
different, set the environment variable GUNGRAUN_LOG for example to
GUNGRAUN_LOG=DEBUG. Accepted values are:
error, warn (default), info, debug, trace.
The logging output is colored by default but follows the Color settings.
See also the documentation of
env_logger.