{{ $productPathData := findRE "[^/]+.*?" .RelPermalink }}
{{ $product := index $productPathData 0 }}
{{ $version := index $productPathData 1 }}

{{ if .Params.source }}
  {{ $linkRegex := print (replaceRE `[0-9]` "" $product) "(?:[0-9])*" "/version" }}
  {{ readFile .Params.source | replaceRE $linkRegex (print $product "/" $version) | .RenderString | safeHTML }}
{{ else }}
  {{ .Content }}
{{ end }}