#!/bin/env bash
declare -a hostlist=$(grep -P '(?<!#)--hostname' *.ks | awk -F'=' '{print $2}')
declare -a not_predefined_hosts=$(grep -L "\-\-hostname" *.ks | cut -d\. -f1 )
declare -a commented=$(grep -l ".*#.*\-\-hostname" *.ks | cut -d\. -f1 )

for host in "${not_predefined_hosts[@]}"
do
    hostlist+="$host"
done 

for host in "${commented[@]}"
do
    hostlist+="$host"
done