Re: Shell function & variable usage.

[Greg Wooledge <greg@wooledge.org>]

On Fri, Dec 06, 2024 at 15:11:51 -0700, peter@easthope.ca wrote:
> (2)
> exclusions='*.mp3'
> exclusions+='*.mp4'
> Restore() { \
>   source=somewhere/Backup/ ;
>   echo "source is $source." ;
>   destination=elsewhere/workingDirectory ;
>   echo "destination is $destination." ;
>   rsync \
>   -anuv --exclude=$exclusions $source $destination ; }
> 
> In a realistic case, there are more than two exclusion patterns. 

Store the exclusions in an ARRAY, not in a string.  Then create a
second array which contains the spelled-out --exclude=... options.

#!/bin/bash
exclusions=( '*.mp3' '*.mp4' '*.wav' )
exclude=( "${exclusions[@]/#/--exclude=}" )
source=...
destination=...
rsync -anuv "${exclude[@]}" "$source" "$destination"