ytt replacement

demo.yaml

apiVersion: test.sample.dev/v1beta1
kind: Test
metadata:
  name: name
spec:
  exercises:
    files:
      - image: # Note: format is {repository-name}-files
          url: $(image_repository)/files:latest
      - path: .local/share/
        image:
          url: $(image_repository)/extension-files:2.1.0
      - path: exercises
        git:
          url: https://github.com/sample/repo
          ref: main
        newRootPath: .

overlay.yaml

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

#@ def startswith(index, left, right):
#@  return left.startswith(right)
#@ end

#@ def relocate(old, new):
#@  return lambda left, right: left.replace(old, new)
#@ end

#@ external_registry = "$(image_repository)"
#@ internal_registry = "ghcr.io"

#@overlay/match by=overlay.subset({"kind":"Test"}),expects="0+"
---
spec:
  exercises:
    files:
      #@overlay/match by=lambda i,l,r: "image" in l, expects="0+"
      - image:
          #@overlay/replace via=relocate(external_registry, internal_registry)
          url: