YAML document start marker causes WARNING: environments and releases cannot be defined within the same YAML part

[jim-barber-he]

Operating system

Debian stable (12 bookworm)

Helmfile Version

0.158.0

Helm Version

v3.13.1

Bug description

I have found that having the leading document start marker --- in helmfile.yaml is causing the following warning even though the environment section is separated from the other sections.

WARNING: environments and releases cannot be defined within the same YAML part. Use --- to extract the environments into a dedicated part

Removing the first document start marker solves it, however tools like yamllint expect that to be there by default (for example).

So this causes the warning:

---
environments:
  ...
---
releases:
  ...

While this does not.

environments:
  ...
---
releases:
  ...

Example helmfile.yaml

---
environments:
  prod:
  test:

---
helmDefaults:
  atomic: true
  cleanupOnFail: true
  createNamespace: false

releases:
  - name: sre
    chart: ./helm/charts/sre
    labels:
      app: sre
    namespace: {{ env "RELEASE_NAMESPACE" | default "sre" }}
    values:
      - helm/vars/cronjobs.yaml.gotmpl
      - helm/vars/values.yaml.gotmpl

  - name: system-reserved-resources
    chart: ./helm/charts/system-reserved-resources
    labels:
      app: sre
    namespace: {{ env "RELEASE_NAMESPACE" | default "sre" }}
    values:
      - helm/vars/system-reserved.yaml.gotmpl

Error message you've seen (if any)

WARNING: environments and releases cannot be defined within the same YAML part. Use --- to extract the environments into a dedicated part

Steps to reproduce

Details above

Working Helmfile Version

Whatever version before this warning was added to prepare for helmfile v1.

Relevant discussion

No response

[yxxhero]

@yxxhero thanks for your issue. I will post a PR as soon as I can.