Use variable value as Environment parameter in GoCD

Question

I'm trying to write a shell script which read variables from a file and replace that with the Environment variable define in GoCD.

Now the challenge i'm facing is i'm trying to use value of variable as parameter

Below is my script

#!/bin/bash 
filename="keyword.txt" 
while IFS="," read f1 f2 f3
do
        f6="Env_var"
        a="$($f6)"
        echo $a
       # echo "$f1" "$f3"
       # sed -i s|$f1|$($f6)|g /var/lib/go-agent/pipelines/StormCluster-Deploy-2/"$f3".xml
done < "$filename"

Also in GoCD environment variable,i have given Env_var = 1234

Now here the script is giving output $Env_var

Where as i want that $Env_var value i.e 1234 define in GoCD as Environment variable should be the output

Kindly help!

Answer 1

I think the problem is not in GoCD, but in wrong parameter expansion. What you should probably do is:

a="${!f6}"

You can read more about that in Shell Parameter Expansion section.