Reference all paths in single linux script - like a header file for better portability [closed]

Shell Scripting newbie here.

Please bear with me.

Linux 3.0.101-108.87-default x86_64

I have Script1.sh which is referencing folders . I am trying to include all these paths in the script in a single headerscript.sh and then reference the headerscript.sh in Script1.sh

I am doing this right now

Script1.sh
 
setenv SCRIPT  /../site/SCRIPTS
setenv TOP     /../site/TOP
setenv SUB1    /../site/../.../SUB1
setenv SUB2    /../site/../.../SUB2
setenv SUB3    /../site/../.../SUB3
setenv SUB4    /../site/../.../SUB4
setenv SUB5    /../site/../.../SUB5

Instead I want to do something like this

Script1.sh 

include headerscript.sh

and headerscript.sh will look something like this

headerscript.sh

setenv SCRIPT  /../site/SCRIPTS
setenv TOP     /../site/TOP
setenv SUB1    /../site/../.../SUB1
setenv SUB2    /../site/../.../SUB2
setenv SUB3    /../site/../.../SUB3
setenv SUB4    /../site/../.../SUB4
setenv SUB5    /../site/../.../SUB5

This allows me to make the script modular by just including headerscript.sh in another script and easier to debug.

What should I be doing ?

I don't want to include this in .alias

To "include" one script from another you should use . (dot operator) or source (depending on your shell).

So you would use in Script1.sh

. headerscript.sh

References:

https://unix.stackexchange.com/questions/309768/source-vs-why-different-behaviour

https://stackoverflow.com/questions/20094271/using-dot-or-source-while-calling-another-script-what-is-the-difference

https://ss64.com/bash/source.html#:~:text=source%20is%20a%20synonym%20for,available%20after%20the%20script%20completes.