I am new to kubernetes and helm. I started using helm and I have the follwoing snippet:

{{- $image := printf "%s/%s:%s" $.Values.global.repository $.Values.global.images.xxx.image $.Values.global.images.xxx.tag -}}
apiVersion: v1
kind: Pod
metadata:
  name: xxxx-test-ready
  labels:
    app: xxxxx-test
    app.kubernetes.io/name: xxxxx-test
    helm.sh/chart: authsvc
    release: {{ $.Release.Name }}
    app.kubernetes.io/instance: {{ $.Release.Name }}
    app.kubernetes.io/managed-by: {{ $.Release.Service }}

My issue is here:

  {{- $image := printf "%s/%s:%s" $.Values.global.repository $.Values.global.images.xxx.image $.Values.global.images.xxx.tag -}}

I think I understand what it does : basically it creates the image specification and add it to a var called image for later use case. however I do not feel comfortable with this templating language and I am not even sure if it is erlang or golang. What is the best starting point to get confident with this templating language? Should I learn golang?