Add periodic logging every 100th file iterated

src/FileMigrationHelper.php

@@ -2,12 +2,14 @@
 
 namespace SilverStripe\Assets;
 
+use Psr\Log\LoggerInterface;
 use SilverStripe\Assets\Flysystem\FlysystemAssetStore;
 use SilverStripe\Assets\Storage\AssetStore;
 use SilverStripe\Core\Config\Config;
 use SilverStripe\Core\Config\Configurable;
 use SilverStripe\Core\Environment;
 use SilverStripe\Core\Injector\Injectable;
+use SilverStripe\Core\Injector\Injector;
 use SilverStripe\ORM\DataList;
 use SilverStripe\ORM\DataObject;
 use SilverStripe\ORM\DataQuery;
@@ -34,6 +36,9 @@ class FileMigrationHelper
      */
     private static $delete_invalid_files = true;
 
+    /** @var LoggerInterface */
+    private $logger;
+
     /**
      * Perform migration
      *
@@ -56,27 +61,40 @@ public function run($base = null)
         Environment::increaseTimeLimitTo();
         Environment::increaseMemoryLimitTo();
 
+        $this->logger = Injector::inst()->get(LoggerInterface::class);
+
         // Loop over all files
-        $count = 0;
+        $i = $migrated = 0;
         $originalState = null;
         if (class_exists(Versioned::class)) {
             $originalState = Versioned::get_reading_mode();
             Versioned::set_stage(Versioned::DRAFT);
         }
 
-        foreach ($this->getFileQuery() as $file) {
+        $query = $this->getFileQuery();
+        $total = $query->count();
+        foreach ($query as $file) {
             // Bypass the accessor and the filename from the column
             $filename = $file->getField('Filename');
 
             $success = $this->migrateFile($base, $file, $filename);
+
+            if ($i % 100 == 0) {
+                /** @var LoggerInterface $logger */
+                if ($this->logger != null) {
+                    $this->logger->info("Iterated $i out of $total files. Migrated $migrated files.");
+                }
+            }
+
+            $i++;
             if ($success) {
-                $count++;
+                $migrated++;
             }
         }
         if (class_exists(Versioned::class)) {
             Versioned::set_reading_mode($originalState);
         }
-        return $count;
+        return $migrated;
     }
 
     /**