kubernetes-sigs/kustomize
kustomize lets you customize raw, template-free YAML files for multiple purposes, leaving the original YAML untouched and usable as is. kustomize targets kubernetes; it understands and can patch kubernetes style API objects. It's like , in that what it does is declared in a file, and it's like , in that it emits edited text.
https://github.com/kubernetes-sigs/kustomize