#!/usr/bin/env bash
# Delete all ReplicaSets with 0 desired replicas (stale rollout history)
set -euo pipefail
deleted=0
while IFS= read -r line; do
  ns=$(echo "$line" | awk '{print $1}')
  name=$(echo "$line" | awk '{print $2}')
  kubectl delete rs "$name" -n "$ns" --ignore-not-found >/dev/null 2>&1 && \
    echo "Deleted $ns/$name" && deleted=$((deleted+1))
done < <(kubectl get rs -A --no-headers | awk '$3=="0" {print $1, $2}')
echo "--- Total deleted: $deleted ---"