Playbook full path variable

Hello,

Well, this must be really simple, but I cannot find an answer...

How can I get the full path of the playbook that is being deployed (I
mean getting this value inside that playbook)?
Is there any variable (in facts maybe?) that holds the full path to the
current playbook file?

There isn't.

This has been discussed before and I would gladly take a patch to add this.

Hmm... what is the most appropriate place to add this?