CanalTP/navitia — pull request #547 by kinnou02 (2014-09-12 07:16:07+00:00)
Title: Tyr: add a command for deleting old backup directories 

For one instance:

./manage.py purge_instance fr-idf

For purging all the instances:

./manage.py purge_instances

The option "-b" can be use for run the task in background (with a
celery worker)