+declare -a yaml_images
+readarray -t yaml_images <<< "$(grep -r _system_image: --include \*.yaml \
+ | awk -F": " -e '{print $3}' | sed "s:'::;s:'$::;/^$/d" | sort -u)"
+declare -a cfg_images
+readarray -t cfg_images <<< "$(grep -r IMAGE_NAME --include \*.cfg \
+ | awk -F'=' -e '{print $2}' | sort -u)"
+combined=("${yaml_images[@]}" "${cfg_images[@]}")