ENGCOM-5970: Fix for CLI Backup doesn't work properly when directory is a symlink … #24755

 - Merge Pull Request #24755 from ivan-koliadynskyy/magento2:export-media-symlinks-13218
 - Merged commits:
   1. b27a576
   2. 7a9f956

Author: magento-engcom-team

lib/internal/Magento/Framework/Backup/Archive/Tar.php

@@ -15,6 +15,9 @@
 use RecursiveDirectoryIterator;
 use RecursiveIteratorIterator;
 
+/**
+ * Class to work with tar archives
+ */
 class Tar extends \Magento\Framework\Archive\Tar
 {
     /**
@@ -25,8 +28,7 @@ class Tar extends \Magento\Framework\Archive\Tar
     protected $_skipFiles = [];
 
     /**
-     * Overridden \Magento\Framework\Archive\Tar::_createTar method that does the same actions as it's parent but
-     * filters files using \Magento\Framework\Backup\Filesystem\Iterator\Filter
+     *  Method same as it's parent but filters files using \Magento\Framework\Backup\Filesystem\Iterator\Filter
      *
      * @param bool $skipRoot
      * @param bool $finalize
@@ -38,9 +40,8 @@ class Tar extends \Magento\Framework\Archive\Tar
     protected function _createTar($skipRoot = false, $finalize = false)
     {
         $path = $this->_getCurrentFile();
-
         $filesystemIterator = new RecursiveIteratorIterator(
-            new RecursiveDirectoryIterator($path),
+            new RecursiveDirectoryIterator($path, RecursiveDirectoryIterator::FOLLOW_SYMLINKS),
             RecursiveIteratorIterator::SELF_FIRST
         );
 
@@ -50,6 +51,10 @@ protected function _createTar($skipRoot = false, $finalize = false)
         );
 
         foreach ($iterator as $item) {
+            // exclude symlinks to do not get duplicates after follow symlinks in RecursiveDirectoryIterator
+            if ($item->isLink()) {
+                continue;
+            }
             $this->_setCurrentFile($item->getPathname());
             $this->_packAndWriteCurrentFile();
         }