Get diff for helmfile against actual k8s state

diff-helmfile-k8s.sh

#!/usr/bin/env bash

# Render all the k8s yaml
helmfile -f hello.yml template > ~/Desktop/hello.helmfile.yml

# Diff the new yaml with what's actually deployed
tail -n +2 ~/Desktop/hello.helmfile.yml | kubectl diff -f - > ~/Desktop/hello.helmfile.diff 

# If diff is acceptable, run k8s
kubectl apply -f ~/Desktop/hello.helmfile.yml

# Then you can do a helmfile apply on top of it
helmfile -f hello.yml apply