argocd-example-apps/app-of-apps-kustomize/base/kustomize-argocd-config.yaml

varReference:
- path: spec/destination/namespace
  kind: Application
  apiVersion: argoproj.io/v1alpha1
- path: spec/destination/server
  kind: Application
  apiVersion: argoproj.io/v1alpha1
- path: spec/project
  kind: Application
  apiVersion: argoproj.io/v1alpha1
- path: spec/source/targetRevision
  kind: Application
  apiVersion: argoproj.io/v1alpha1