-declare -a cfg_images
-declare -a yaml_images
-readarray -t cfg_images <<< "$(grep -r IMAGE_NAME --include \*.cfg \
- | awk -F'=' '{print $2}' | sort -u)"
-readarray -t yaml_images <<< "$(grep -r 'ZZCI - ' --include \*.yaml \
+images+=("$(grep -r IMAGE_NAME --include \*.cfg jenkins-config \
+ | awk -F'=' '{print $2}' | sort -u)")
+set +o pipefail # Not all projects have images in YAML files and grep returns non-zero on 0 results
+# Ignore SC2179 since we do not want () to result in an empty array item.
+#shellcheck disable=SC2179
+images+="$(grep -r 'ZZCI - ' --include \*.yaml jjb \