How to show hidden rake tasks

Rake tasks are easily listed from the command line with rake -T. However if
you’ve written a rake task and neglected to provide a description for it with
the desc as the first line, the task will not show up with the usual rake -T. These are essentially hidden rake tasks!

To display them, append -A to your normal rake command; so:

rake -T -A

and hey presto, your hidden tasks are visible.