dust

foo.bash

# Not work, because of https://github.com/kubernetes/kubernetes/issues/20352
for label in ${labels//,/ }; do
  if [ "${query}" != '' ]; then
    query="${query} &&"
  fi
  query=${query}@.spec.selector.${label//=/\=\=\"}\"
done
$KUBECTL get rs --no-headers=true -o=jsonpath="{.items[?(${query})].metadata.name}" | xargs

# Use jq
if [ "${parent_type}" == "deployments" -o "${parent_type}" == "replicasets" ]; then
  tmp='.matchLabels'
else
  tmp=''
fi
for label in ${labels//,/ }; do
  if [ "${query}" != '' ]; then
    query="${query} and"
  fi
  query="${query}.spec.selector${tmp}.\"${label//=/\"\=\=\"}\""
done
query=".items[] | select(${query}) | .metadata.name"
echo "($parent_type) by ($query)"
$KUBECTL get ${parent_type} --no-headers=true -o=json | jq "${query}"