Helmfile: Cannot convert the output of readFile into List for iteration

[abdennour]

I have a yaml file projects.yaml

# projects.yaml
- yako
- pera
- okta

In values.yaml.gotmpl, i want to iterate thru the content of projects.yaml :

# values.yaml.gotmpl
{{ $projects := readFile 'projects.yaml' }}
{{ range $_, $project := $projects }}
   # do something with $project . e.g: tpl (readFile 'proj-config.yaml') (dict $name $project)
{{ end}}

Unfortunately , i got this error :

failed to render [values.yaml.gotmpl], because of template: stringTemplate:60:41: executinng "stringTemplate" at <$projects>: range can't iterate over projects:
- yako
- pera
- okta

I made a lot of blind attempts to make it work :

• {{ range $_, $project := $projects | fromYaml }}
• {{ range $_, $project := $projects | toYaml }}
• {{ range $_, $project := $projects | list }}

No way 😩

[mumoshu]

projects.yaml needs to contain a yaml hash as the root element. Also you need to use fromYaml as readFile reads it as text where what you want seems like a map object.

projects.yaml

# projects.yaml
projects:
- yako
- pera
- okta

helmfile.yaml

{{ $projects := readFile "projects.yaml" | fromYaml }}
values:
- projects:
{{ range $_, $project := get "projects" $projects }}
  - {{ $project }}
{{ end}}