Hi @bjornicus,
The Nomad template block uses consul-template internally to perform the rendering and API calls. The documentation on the secret function includes the following which I believe would help solve you problem:
You can also guard against empty values using
iforwithblocks.
Specifically as you mention the use of an empty string I believe the following code example would be suited:
{{ with secret "secret/my/optional/key"}}
{{ if .Data.value }}
MY_OPTIONAL_SECRET = "{{ .Data.value }}"
{{ else }}
MY_OPTIONAL_SECRET = ""
{{ end }}
{{ end }}
Thanks,
jrasell and the Nomad team