blog-static/themes/vanilla/layouts/shortcodes/codelines.html

{{ $s := (readFile (printf "code/%s" (.Get 1))) }}
{{ $t := split $s "\n" }}
{{ if not (eq (int (.Get 2)) 1) }}
{{ .Scratch.Set "u" (after (sub (int (.Get 2)) 1) $t) }}
{{ else }}
{{ .Scratch.Set "u" $t }}
{{ end }}
{{ $v := first (add (sub (int (.Get 3)) (int (.Get 2))) 1) (.Scratch.Get "u") }}
{{ if (.Get 4) }}
{{ .Scratch.Set "opts" (printf ",%s" (.Get 4)) }}
{{ else }}
{{ .Scratch.Set "opts" "" }}
{{ end }}
<div class="highlight-group">
    <div class="highlight-label">From <a href="https://dev.danilafe.com/Web-Projects/blog-static/src/branch/master/code/{{ .Get 1 }}">{{ path.Base (.Get 1) }}</a>,
        {{ if eq (.Get 2) (.Get 3) }}line {{ .Get 2 }}{{ else }} lines {{ .Get 2 }} through {{ .Get 3 }}{{ end }}</div>
    {{ highlight (delimit $v "\n") (.Get 0) (printf "linenos=table,linenostart=%d%s" (.Get 2) (.Scratch.Get "opts")) }}
</div>