add version rank attribute to record in search index

Author: mojavelinux

src/helpers/index.js

@@ -0,0 +1,3 @@
+'use strict'
+
+module.exports = (collection, item) => collection.indexOf(item)

src/partials/head-meta.hbs

@@ -8,15 +8,17 @@
 <link rel="schema.dcterms" href="https://purl.org/dc/terms/">
 <meta name="dcterms.subject" content="{{page.component.name}}">
 <meta name="dcterms.identifier" content="{{page.version}}">
-<meta name="docsearch:component_title" content="{{{page.component.title}}}">
+<meta name="docsearch:component_title" content="{{page.component.title}}">
 {{#if (eq page.version 'master')}}
 <meta name="docsearch:component_version" content='["{{{./page.component.name}}}","{{{./page.component.name}}}"]'>
+<meta name="docsearch:version_rank" content="0">
 {{else}}
 {{#with page.componentVersion}}
 <meta name="docsearch:component_version" content='["{{{./name}}}@{{{./version}}}"{{#if (eq this @root.page.component.latest)}},"{{{./name}}}"{{/if}}]'>
 <meta name="docsearch:version" content="{{{./version}}}">
-<meta name="docsearch:display_version" content='"{{{./displayVersion}}}"'>
+<meta name="docsearch:display_version" content='"{{./displayVersion}}"'>
 {{/with}}
+<meta name="docsearch:version_rank" content="{{{index page.component.versions page.componentVersion}}}">
 {{/if}}
 {{/if}}
 <meta name="generator" content="Antora {{antoraVersion}}">