I was wondering what kind of template functions, if any, are available in the namespace templates: The reason I'm asking is because I would want to make sure that the service account name doesn't exceed the character limit of GCP. This example works:

002_serviceaccount.yaml: |
      apiVersion: v1
      kind: ServiceAccount
      metadata:
        name: extra
        namespace: '{{ namespace }}'
        annotations:
          iam.gke.io/gcp-service-account: '{{ project }}-{{ domain }}@gcp-project.iam.gserviceaccount.com'

But if I'm trying to use some go template functions (and I might be using them wrong since my go knowledge is not great) it doesn't seem to work

002_serviceaccount.yaml: |
      apiVersion: v1
      kind: ServiceAccount
      metadata:
        name: extra
        namespace: '{{ namespace }}'
        annotations:
          iam.gke.io/gcp-service-account: '{{printf "%q" "output"}}-{{ printf "%.9s" project }}-{{ domain }}@gcp-project.iam.gserviceaccount.com'

@ripe-smartphone-56353 I'm not proficient enough in Go templating either but, judging by the way it's used in some areas of the code (example) I'd say that something like this?

annotations:
          iam.gke.io/gcp-service-account: '{{ project | trunc 9 }}-{{ domain }}@gcp-project.iam.gserviceaccount.com'

Thanks. Unfortunately that doesn't seem to work. I tried with several variants but it doesn't seem to run this through regular templating...

002_serviceaccount.yaml: |
      apiVersion: v1
      kind: ServiceAccount
      metadata:
        name: extra
        namespace: '{{ namespace }}'
        annotations:
                   iam.gke.io/gcp-service-account: '{{- .project | trunc 9 }}-{{ .project | trunc 9 }}-{{ $project | trunc 9 }}-{{- printf "%s-%s" .Release.Name $name | trunc 9 }}-{{ domain }}@prod.iam.gserviceaccount.com'

which results in

kubectl describe serviceaccounts extra -n flytesnacks-live
Name:                extra
Namespace:           flytesnacks-live
Labels:              <none>
Annotations:         iam.gke.io/gcp-service-account: {{- .project | trunc 9 }}-{{ .project | trunc 9 }}-{{ $project | trunc 9 }}-{{- printf "%s-%s" .Release.Name $name | trunc 9 }}-live@prod.iam.gserviceaccount.com
Image pull secrets:  <none>
Mountable secrets:   <none>
Tokens:              <none>
Events:              <none>