Add Environment Variables from ConfigMap

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: add-env-vars-from-cm
  annotations:
    policies.kyverno.io/title: Add Environment Variables from ConfigMap
    policies.kyverno.io/minversion: 1.6.0
    policies.kyverno.io/subject: Pod
    policies.kyverno.io/category: Other
    policies.kyverno.io/description: "Instead of defining a common set of environment variables multiple times either in manifests or separate policies, Pods can reference entire collections stored in a ConfigMap. This policy mutates all initContainers (if present) and containers in a Pod with environment variables defined in a ConfigMap named `nsenvvars` that must exist in the destination Namespace.     "
spec:
  rules:
    - name: add-env-vars-from-cm
      match:
        any:
          - resources:
              kinds:
                - Pod
      mutate:
        patchStrategicMerge:
          spec:
            initContainers:
              - (name): "*"
                envFrom:
                  - configMapRef:
                      name: nsenvvars
            containers:
              - (name): "*"
                envFrom:
                  - configMapRef:
                      name: nsenvvars