Deletes the leftover resources after purging a chart. Workaround for: https://github.com/helm/helm/issues/6646

delete-helm-chart-resources.sh

#!/usr/bin/env bash
ENV=dev
APP=cert-manager
NAMESPACE=cert-manager
FILENAME=upgrade-error.txt

while true
do
function upgrade() {
        helm upgrade $APP . \
                --install --namespace $NAMESPACE \
                -f $ENV.values.yaml -f $ENV.secrets.yaml \
                2>&1 | tee $FILENAME
}

upgrade

kind=$(cat $FILENAME | grep -oE 'kind:\ (\S[^,]*)' \
        | sed 's/kind:\ //g' | awk '{print tolower($0)}')
        
name=$(cat $FILENAME | grep -oE 'name:\ (\S[^,]*)' \
        | sed 's/name:\ //g')

echo "Delete kind: $kind with name: $name?
Only 'y' will be accepted to approve."
read -p "Enter a value: " shouldContinue

if [[ "$shouldContinue" != "y" ]]; then
                echo "You have canceled the upgrade"
                        exit
                        fi

kubectl delete $kind $name

done