patch tiller image to new ghcr registry

fix-tiller-image.sh

#!/usr/bin/env bash

# stashing original context
OLD_CONTEXT=$(kubectl config current-context)

if [ -z "$1" ]; then
    NEW_CONTEXT=$(kubectl config get-contexts --output=name | fzf)
else
    NEW_CONTEXT="$1"
fi

echo "updating tiller image on cluster ${NEW_CONTEXT}"

kubectl config use-context "$NEW_CONTEXT"

printf "old" 
kubectl describe deployment/tiller-deploy --namespace=kube-system | grep Image

HELM_VERSION=$(kubectl get deployment/tiller-deploy -o jsonpath='{.spec.template.spec.containers[0].image}' --namespace kube-system | cut -d ":" -f2)
#check it exists first by pulling locally
docker pull -q ghcr.io/helm/tiller:${HELM_VERSION} && kubectl set image deployment/tiller-deploy tiller=ghcr.io/helm/tiller:${HELM_VERSION} --namespace=kube-system
printf "new"
kubectl describe deployment/tiller-deploy --namespace=kube-system | grep Image

# restoring original context
kubectl config use-context "$OLD_CONTEXT"