skip empty lines

build-pkg/build-all

@@ -100,9 +100,16 @@ before continuing with the next line.";
     # trim leading/tailing whitespaces
     line="$(echo "${line}" | xargs)" || return $?
     space_separated_to_array line pkgs
+
+    # skip empty lines
+    # shellcheck disable=SC2154
+    if [ "${#pkgs[@]}" -eq 0 ]; then
+      echo "Skipped empty line."
+      continue;
+    fi
+
     # Rebuild the docker image with refreshed mirrors => this fetches packages that were built in a previous build stage
     update-build-image || return $?
-    # shellcheck disable=SC2154
     build-and-push "${pkgs[@]}" || exit $?
   done