{{/* Returns sections from front matter or from data. */}}
{{- $sections := .Params.sections -}}
{{- if not $sections -}}
  {{/* Data-driven pages. */}}
  {{- $p := .File.PathBase -}}
  {{- with index site.Data.pages $p -}}
    {{- $sections = .sections -}}
    {{- warnf "HBX: Using data-driven sections from data/pages/%s for page %s" $p $.RelPermalink -}}
  {{- end -}}
{{- end -}}
{{- return $sections -}}