Creating a string variable name from the value of another string

Question

In my bash script I have two variables CONFIG_OPTION and CONFIG_VALUE which contain string VENDOR_NAME and Default_Vendor

Answer 1

This uses bash builtins:

#!/bin/bash

VAR1="VAR2"

declare "${VAR1}"="value"

echo "VAR1=${VAR1}"
echo "VAR2=${VAR2}"

The script output:

VAR1=VAR2
VAR2=value

Here's the snippet using your variable names:

#!/bin/bash

CONFIG_OPTION="VENDOR_NAME"

declare "${CONFIG_OPTION}"="value"

echo "CONFIG_OPTION=${CONFIG_OPTION}"
echo "VENDOR_NAME=${VENDOR_NAME}"

The script output:

CONFIG_OPTION=VENDOR_NAME
VENDOR_NAME=value