by Apollia - http://astroblahhh.com/
A console-only script for Puppy Linux.
Original version completed and released June 24, 2017.
Last modified: Feb. 9, 2018. No code changed. Renamed the repo from "is-this-pet-installed" to "Is-This-Pet-Installed", and updated the Readme a bit.
is-this-pet-installed [.pet filename or filepath]
Accepts just 1 argument - the name or path of a .pet file.
This script uses a combination of awk and grep to search this list of
installed .pet files:
Exit code 0 = Found the pet name given in Arg 1.
Exit code 1 = Searched the list, but the pet name wasn't there.
Exit code 2 = Arg 1 didn't end in ".pet" (case insensitive).
Exit code 3 = Arg 1 was empty.