{{ if .Page.Params.main_menu }} {{ .Scratch.Set "main_menu" .Page.Params.main_menu }} {{ else if (index .Site.Menus "main") }} {{ .Scratch.Set "main_menu" "main" }} {{ else }} {{ .Scratch.Set "main_menu" "neptune" }} {{ end }} {{ $main_menu := .Scratch.Get "main_menu" }} {{ $current_page := . }}