Writing declarative command-line scripts, using Ansible modules and roles

Ever wanted to just quickly run a few Ansible tasks or apply a role from Ansible Galaxy, without having to manually setup Ansible, or create an inventory, and/or download role(s) from Ansible Galaxy, etc...? Or have you ever wished you could write a re-usable command-line script using Ansible modules and roles? Or, maybe you haven't thought about it before, but now that I mention it...

If, this here blog post is for you.