Application Field Validation

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: application-field-validation
  annotations:
    policies.kyverno.io/title: Application Field Validation
    policies.kyverno.io/category: Argo
    policies.kyverno.io/severity: medium
    policies.kyverno.io/subject: Application
    kyverno.io/kyverno-version: 1.6.0
    policies.kyverno.io/minversion: 1.6.0
    kyverno.io/kubernetes-version: "1.23"
    policies.kyverno.io/description: This policy performs some best practices validation on Application fields. Path or chart must be specified but never both. And destination.name or destination.server must be specified but never both.
spec:
  validationFailureAction: Audit
  background: true
  rules:
    - name: source-path-chart
      match:
        any:
          - resources:
              kinds:
                - Application
      validate:
        message: "`spec.source.path` OR `spec.source.chart` should be specified but never both."
        anyPattern:
          - spec:
              source:
                path: "?*"
                X(chart): null
          - spec:
              source:
                X(path): null
                chart: "?*"
    - name: destination-server-name
      match:
        any:
          - resources:
              kinds:
                - Application
      validate:
        message: "`spec.destination.server` OR `spec.destination.name` should be specified but never both."
        anyPattern:
          - spec:
              destination:
                server: "?*"
                X(name): null
          - spec:
              destination:
                X(server): null
                name: "?*"