From fe2ca6c15eb04345448dd0674af4c5c8eb8ea8a8 Mon Sep 17 00:00:00 2001
From: Luke Towers <github@luketowers.ca>
Date: Fri, 18 Sep 2020 00:11:11 -0600
Subject: [PATCH] Fix issue where resized images were not correctly identified
 as already having been resized when atomic (blue/green) deployment strategies
 are used in conjunction with files being stored on the local filesystem in a
 shared symlinked storage folder.

---
 modules/system/classes/ImageResizer.php | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/modules/system/classes/ImageResizer.php b/modules/system/classes/ImageResizer.php
index ee3006d25..e5d463aca 100644
--- a/modules/system/classes/ImageResizer.php
+++ b/modules/system/classes/ImageResizer.php
@@ -219,9 +219,21 @@ class ImageResizer
      */
     public function getConfig()
     {
+        $disk = $this->image['disk'];
+
+        // Normalize local disk adapters with symlinked paths to their target path
+        // to support atomic deployments where the base application path changes
+        // each deployment but the realpath of the storage directory does not
+        if (FileHelper::isLocalDisk($disk)) {
+            $realPath = realpath($disk->getAdapter()->getPathPrefix());
+            if ($realPath) {
+                $disk->getAdapter()->setPathPrefix($realPath);
+            }
+        }
+
         $config = [
             'image' => [
-                'disk' => $this->image['disk'],
+                'disk' => $disk,
                 'path' => $this->image['path'],
                 'source' => $this->image['source'],
             ],