first pass at adding OpenSearch support to phabricator

resources/builtin/opensearch.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/" xmlns:moz="http://www.mozilla.org/2006/browser/search/">
+  <ShortName>phabricator</ShortName>
+  <Description>TITLE full site search</Description>
+  <InputEncoding>UTF-8</InputEncoding>
+  <Image width="16" height="16" type="image/x-icon">data:image/png;base64,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</Image>
+  <Url type="text/html" template="BASE_URI?script=1&amp;query={searchTerms}"></Url>
+  <Url type="application/opensearchdescription+xml" rel="self" template="OPENSEARCH_URI" />
+  <moz:SearchForm>BASE_URI</moz:SearchForm>
+</OpenSearchDescription>

src/__phutil_library_map__.php

@@ -4221,6 +4221,7 @@
     'PhabricatorSearchManagementWorkflow' => 'applications/search/management/PhabricatorSearchManagementWorkflow.php',
     'PhabricatorSearchNgrams' => 'applications/search/ngrams/PhabricatorSearchNgrams.php',
     'PhabricatorSearchNgramsDestructionEngineExtension' => 'applications/search/engineextension/PhabricatorSearchNgramsDestructionEngineExtension.php',
+    'PhabricatorSearchOpensearchController' => 'applications/search/controller/PhabricatorSearchOpensearchController.php',
     'PhabricatorSearchOrderController' => 'applications/search/controller/PhabricatorSearchOrderController.php',
     'PhabricatorSearchOrderField' => 'applications/search/field/PhabricatorSearchOrderField.php',
     'PhabricatorSearchRelationship' => 'applications/search/constants/PhabricatorSearchRelationship.php',

src/applications/search/application/PhabricatorSearchApplication.php

@@ -50,6 +50,9 @@ public function getRoutes() {
           => 'PhabricatorSearchRelationshipController',
         'source/(?P<relationshipKey>[^/]+)/(?P<sourcePHID>[^/]+)/'
           => 'PhabricatorSearchRelationshipSourceController',
+        ),
+      '/' => array(
+        'opensearch.xml' => 'PhabricatorSearchOpensearchController'
       ),
     );
   }

src/applications/search/controller/PhabricatorSearchOpensearchController.php

@@ -0,0 +1,37 @@
+<?php
+
+final class PhabricatorSearchOpensearchController
+  extends PhabricatorSearchBaseController {
+
+  const SCOPE_CURRENT_APPLICATION = 'application';
+
+  public function shouldRequireLogin() {
+    return false;
+  }
+
+  public function shouldAllowPartialSessions() {
+    return true;
+  }
+
+  public function handleRequest(AphrontRequest $request) {
+    $root = dirname(phutil_get_library_root('phabricator'));
+    $logo = PhabricatorEnv::getEnvConfig('ui.logo');
+    $title = idx($logo, 'wordmarkText', 'phabricator');
+
+    $content = Filesystem::readFile(
+      $root.'/resources/builtin/opensearch.xml');
+
+    $content = preg_replace('/OPENSEARCH_URI/', PhabricatorEnv::getURI('/opensearch.xml'), $content);
+    $content = preg_replace('/BASE_URI/', PhabricatorEnv::getURI('/search/'), $content);
+    $content = preg_replace('/FAVICON_URI/', PhabricatorEnv::getURI('favicon.ico'), $content);
+    $content = preg_replace('/TITLE/', $title, $content);
+
+    return id(new AphrontFileResponse())
+      ->setContent($content)
+      ->setMimeType("application/opensearchdescription+xml")
+      ->setCanCDN(true)
+      ->setCacheDurationInSeconds(60 * 60 * 24 * 7);
+  }
+}
+
+?>

src/view/page/PhabricatorBarePageView.php

@@ -103,12 +103,15 @@ protected function getHead() {
       }
     }
 
+    $opensearch_tag = $this->opensearchLink();
+
     return hsprintf(
-      '%s%s%s%s%s',
+      '%s%s%s%s%s%s',
       $viewport_tag,
       $mask_icon,
       $favicon_links,
       $referrer_tag,
+      $opensearch_tag,
       $response->renderResourcesOfType('css'));
   }
 
@@ -178,4 +181,18 @@ private function newFavicons() {
     return $favicon_links;
   }
 
+  private function opensearchLink() {
+     $logo = PhabricatorEnv::getEnvConfig('ui.logo');
+     $title = idx($logo, 'wordmarkText', 'phabricator');
+
+    return phutil_tag(
+      'link',
+      array(
+        'rel' => 'search',
+        'type' => 'application/opensearchdescription+xml',
+        'title' => $title,
+        'href' => '/opensearch.xml'
+      )
+    );
+  }
 }