Task "Check if extension pack is already installed" is not idempotent

[jackm]

Task "Check if extension pack is already installed" in file virtualbox.yml:32 registers a variable after running a shell command but Ansible will always mark this task as being changed - this breaks idempotence of the task.

You should add changed_when: false to the task to prevent this since this task is purely for information gathering and should not have any side effects.

This task should also probably be using the Ansible command module instead of the Ansible shell module as the command being run doesn't depend on any shell specific features.