{{- /* Render data/collaborators.yaml, grouping by the single `past` flag. */ -}}
{{- $all := hugo.Data.collaborators -}}
{{- $current := where $all "past" "!=" true -}}
{{- $past := where $all "past" true -}}
<h2 id="collaborators">Collaborators</h2>
<ul>
{{- range $current }}
  {{- $u := .url }}
  <li>{{ if $u }}<a href="{{ $u }}">{{ end }}{{ .name }}{{ if $u }}</a>{{ end }}{{ with .affiliation }}, {{ . }}{{ end }}</li>
{{- end }}
</ul>
{{- with $past }}
<h2 id="wider-network">Wider network</h2>
<ul>
{{- range . }}
  {{- $u := .url }}
  <li>{{ if $u }}<a href="{{ $u }}">{{ end }}{{ .name }}{{ if $u }}</a>{{ end }}{{ with .affiliation }}, {{ . }}{{ end }}</li>
{{- end }}
</ul>
{{- end -}}