{{- $url := split .Permalink "/" -}}
{{- $page_version := index $url (sub (len $url) 4) -}}
{{- $group_slug := index $url (sub (len $url) 3) -}}
{{- $page_slug := index $url (sub (len $url) 2) -}}
{{- $versions_link := "" -}}
{{- if and (eq .Layout "docs") (eq $page_version .Site.Params.docs_version) -}}
{{- $versions_link = urls.JoinPath $group_slug $page_slug "/" -}}
{{- else if (eq .Layout "single") -}}
{{- $versions_link = urls.JoinPath $page_slug "/" -}}
{{- end -}}
{{- $added_in_51 := eq (string .Page.Params.added.version) "5.1" -}}
{{- $added_in_52 := eq (string .Page.Params.added.version) "5.2" -}}
{{- $added_in_53 := eq (string .Page.Params.added.version) "5.3" -}}