NEW Disable re-indexing when migrating files

_config/config.yml

@@ -13,3 +13,7 @@ SilverStripe\Core\Injector\Injector:
   SilverStripe\FullTextSearch\Search\Queries\SearchQuery:
     calls:
       - [ setHandler, [ %$SilverStripe\FullTextSearch\Search\Adapters\SolrSearchAdapter ]]
+
+SilverStripe\Dev\Tasks\MigrateFileTask:
+  extensions:
+  -  SilverStripe\FullTextSearch\Search\Extensions\DisableIndexingOnFileMigration

src/Search/Extensions/DisableIndexingOnFileMigration.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace SilverStripe\FullTextSearch\Search\Extensions;
+
+use Psr\Log\LoggerInterface;
+use SilverStripe\Core\Extension;
+use SilverStripe\FullTextSearch\Search\Updaters\SearchUpdater;
+
+/**
+ * This extension can be applied to `SilverStripe\Dev\Tasks\MigrateFileTask` to avoid constantly re-indexing files
+ * while the file migration is running.
+ */
+class DisableIndexingOnFileMigration extends Extension
+{
+    private static $dependencies = [
+        'logger' => '%$' . LoggerInterface::class . '.quiet',
+    ];
+
+    /** @var LoggerInterface */
+    private $logger;
+
+    /**
+     * @param LoggerInterface $logger
+     */
+    public function setLogger(LoggerInterface $logger)
+    {
+        $this->logger = $logger;
+    }
+
+    public function preFileMigration()
+    {
+        if (SearchUpdater::config()->get('enabled')) {
+            $this->logger->info('Disabling fulltext search re-indexing for this request only');
+            SearchUpdater::config()->set('enabled', false);
+        }
+    }
+}

tests/DisableIndexingOnFileMigrationTest.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace SilverStripe\FullTextSearch\Tests\SolrReindexTest;
+
+use SilverStripe\Core\Injector\Injector;
+use SilverStripe\Dev\SapphireTest;
+use SilverStripe\FullTextSearch\Search\Extensions\DisableIndexingOnFileMigration;
+use SilverStripe\FullTextSearch\Search\Updaters\SearchUpdater;
+
+/**
+ * Logger for recording messages for later retrieval
+ */
+class DisableIndexingOnFileMigrationTest extends SapphireTest
+{
+
+    public function testPreFileMigration()
+    {
+        $this->assertTrue(SearchUpdater::config()->get('enabled'));
+
+        Injector::inst()->get(DisableIndexingOnFileMigration::class)->preFileMigration();
+
+        $this->assertFalse(SearchUpdater::config()->get('enabled'));
+    }
+}