How to resolve symbolic links in a shell script

Question

Given an absolute or relative path (in a Unix-like system), I would like to determine the full path of the target after resolving any intermediate symlinks. Bonus points for

Answer 1

My answer here Bash: how to get real path of a symlink?

but in short very handy in scripts:

script_home=$( dirname $(realpath "$0") )
echo Original script home: $script_home

These are part of GNU coreutils, suitable for use in Linux systems.

To test everything, we put symlink into /home/test2/, amend some additional things and run/call it from root directory:

/$ /home/test2/symlink
/home/test
Original script home: /home/test

Where

Original script is: /home/test/realscript.sh
Called script is: /home/test2/symlink