Restrict search to current version

Resolves #5302.

Author: marcphilipp

antora-playbook.yml

@@ -3,7 +3,6 @@ antora:
     - '@antora/collector-extension'
     - '@antora/pdf-extension'
     - require: '@antora/lunr-extension'
-      index_latest_only: true
       index_by_heading: true
     - require: '@springio/antora-extensions/root-component-extension'
       root_component_name: junit

supplemental-ui/partials/header-content.hbs

@@ -8,7 +8,11 @@
       {{#if env.SITE_SEARCH_PROVIDER}}
       <div class="navbar-item search hide-for-print">
         <div id="search-field" class="field">
-          <input id="search-input" type="text" placeholder="Search the docs"{{#if page.home}} autofocus{{/if}}>
+          <input id="search-input" type="text" placeholder="Search current version"{{#if page.home}} autofocus{{/if}}>
+            <label style="display: none">
+              <!-- restrict search to current version -->
+              <input type="checkbox" data-facet-filter="version:{{page.componentVersion.version}}" checked>
+            </label>
         </div>
       </div>
       {{/if}}