Added sodoSearch script output from ghost_head helper

no issue

- The sodoSearch needs to be injected into rendered HTML the same way portal scripts are.
- The feature is behind a `sodoSearch` alpha flag, so the scripts are injected conditionally

core/frontend/helpers/ghost_head.js

@@ -57,6 +57,16 @@ function getMembersHelper(data, frontendKey) {
     return membersHelper;
 }
 
+function getSearchHelper(frontendKey) {
+    if (!labs.isSet('sodoSearch')) {
+        return '';
+    }
+
+    let helper = `<script defer src="${config.get('sodoSearch:url')}" data-ghost="${urlUtils.getSiteUrl()}" data-key="${frontendKey}" data-api="${urlUtils.urlFor('api', {type: 'content'}, true)}" crossorigin="anonymous"></script>`;
+
+    return helper;
+}
+
 /**
  * **NOTE**
  * Express adds `_locals`, see https://github.com/expressjs/express/blob/4.15.4/lib/response.js#L962.
@@ -193,6 +203,7 @@ module.exports = async function ghost_head(options) { // eslint-disable-line cam
         // no code injection for amp context!!!
         if (!_.includes(context, 'amp')) {
             head.push(getMembersHelper(options.data, frontendKey));
+            head.push(getSearchHelper(frontendKey));
 
             // @TODO do this in a more "frameworky" way
             if (cardAssetService.hasFile('js')) {

core/shared/config/defaults.json

@@ -131,6 +131,9 @@
         "url": "https://unpkg.com/@tryghost/portal@~2.2.0/umd/portal.min.js",
         "version": "2.2"
     },
+    "sodoSearch": {
+        "url": "https://unpkg.com/@tryghost/sodo-search@~0.1.0/umd/sodo-search.min.js"
+    },
     "tenor": {
         "publicReadOnlyApiKey": null,
         "contentFilter": "off"

test/unit/frontend/helpers/ghost_head.test.js

@@ -14,7 +14,7 @@ const urlService = require('../../../../core/server/services/url');
 
 const ghost_head = require('../../../../core/frontend/helpers/ghost_head');
 const proxy = require('../../../../core/frontend/services/proxy');
-const {settingsCache} = proxy;
+const {settingsCache, labs} = proxy;
 
 describe('{{ghost_head}} helper', function () {
     let posts = [];
@@ -1578,7 +1578,7 @@ describe('{{ghost_head}} helper', function () {
 
         it('attaches style tag to existing script/style tag', function (done) {
             settingsCache.get.withArgs('members_enabled').returns(true);
-            
+
             const renderObject = {
                 post: posts[1]
             };
@@ -1736,4 +1736,24 @@ describe('{{ghost_head}} helper', function () {
             }).catch(done);
         });
     });
+
+    describe('search scripts', function () {
+        it('includes search when labs flag enabled', function (done) {
+            labsStub = sinon.stub(labs, 'isSet').returns(true);
+
+            ghost_head(testUtils.createHbsResponse({
+                locals: {
+                    relativeUrl: '/',
+                    context: ['home', 'index'],
+                    safeVersion: '4.3'
+                }
+            })).then(function (rendered) {
+                should.exist(rendered);
+                rendered.string.should.containEql('<script defer src="https://unpkg.com/@tryghost/sodo-search');
+                rendered.string.should.containEql('data-ghost="http://127.0.0.1:2369/" data-key="xyz" data-api="http://127.0.0.1:2369/ghost/api/content/"');
+
+                done();
+            }).catch(done);
+        });
+    });
 });