{{- define "dockercfg" -}}
  {{- $hostname := required "A Docker image registry hostname is required" .Values.image.registry.auth.hostname -}}
  {{- $username := required "A Docker image registry username is required" .Values.image.registry.auth.username -}}
  {{- $password := required "A Docker image registry password is required" .Values.image.registry.auth.password -}}
  {{- $email := required "A Docker image registry email is required" .Values.image.registry.auth.email -}}
  {{- $auth := printf "%s:%s" $username $password | b64enc -}}
  {{- $cfg := printf "{\"auths\":{\"%s\":{\"username\":\"%s\",\"password\":\"%s\",\"email\":\"%s\",\"auth\":\"%s\"}}}" $hostname $username $password $email $auth -}}
  {{- $cfg | b64enc -}}
{{- end -}}