Example of using Kustomize with Helm and Digester

krm-fns.yaml

apiVersion: example.com/v1
kind: DigesterFunction
metadata:
  name: digester
  annotations:
    config.kubernetes.io/function: |
      exec:
        path: ./digester

kustomization.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
helmCharts:
- name: cert-manager
  repo: https://charts.jetstack.io
  version: v1.7.1
transformers:
- krm-fns.yaml

run.sh

#!/bin/bash
if ! command -v ./digester &> /dev/null ; then
  version=$(curl -sL https://api.github.com/repos/google/k8s-digester/releases/latest | jq -r .tag_name)
  curl -Lo digester "https://github.com/google/k8s-digester/releases/download/${version}/digester_$(uname -s)_$(uname -m)"
  chmod +x digester
fi
kustomize build --enable-alpha-plugins --enable-exec --enable-helm | grep image: