-metadata_files=($(diff -s -r "$m2repo_dir" "$WORKSPACE/m2repo-backup" \
- | grep 'Files .* and .* are identical' | awk '{print $2}'))
+mapfile -t metadata_files <<< "$(diff -s -r "$m2repo_dir" "$WORKSPACE/m2repo-backup" \
+ | grep 'Files .* and .* are identical' \
+ | awk '{print $2}')"
set -e # Re-enable.
set +u # $metadata_files could be unbound if project is new.
if [ -n "${metadata_files[*]}" ]; then
for i in "${metadata_files[@]}"; do
set -e # Re-enable.
set +u # $metadata_files could be unbound if project is new.
if [ -n "${metadata_files[*]}" ]; then
for i in "${metadata_files[@]}"; do