chore: Improve variable checks for empty and uninitialized values #598
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I updated the checks for the variables to ensure that they also cover empty strings and uninitialized variables. The previous condition only checked for unset variables, so it could have missed cases where the variable is set but empty. Replaced
if [ ! "$VAR" ];withif [ -z "$VAR" ];for better reliability.This should prevent any false negatives in variable validation.