ytt_overlay_test.yaml

#! See https://kubernetes.slack.com/archives/CH8KCCKA5/p1685663088982309

#@ load("@ytt:overlay", "overlay")

---
apiVersion: v1
kind: Service
metadata:
  labels:
    foo: bar
  name: some-name
  namespace: pl
---

#@ def with_component_name(old):
#@  x = dict(**old())
#@  x["metadata"]["labels"]["app.kubernetes.io/component"] = x["metadata"]["name"]
#@  return x
#@ end

#@overlay/match by=overlay.subset({"metadata":{"namespace":"pl"}}), expects="1+"
#@overlay/replace via=lambda resource, _: with_component_name(resource)
---