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Packages/com.unity.asset-store-tools/Editor/Utility/SymlinkUtil.cs

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+using System.IO;
+
+namespace AssetStoreTools.Utility
+{
+    internal static class SymlinkUtil
+    {
+        private const FileAttributes FolderSymlinkAttributes = FileAttributes.Directory | FileAttributes.ReparsePoint;
+
+        public static bool FindSymlinkFolderRelative(string folderPathAbsolute, out string relativePath)
+        {
+            // Get directory info for path outside of the project
+            var absoluteInfo = new DirectoryInfo(folderPathAbsolute);
+            
+            // Get all directories within the project
+            var allFolderPaths = Directory.GetDirectories("Assets", "*", SearchOption.AllDirectories);
+            foreach (var path in allFolderPaths)
+            {
+                var fullPath = path.Replace("\\", "/");
+                
+                // Get directory info for one of the paths within the project
+                var relativeInfo = new DirectoryInfo(fullPath);
+                
+                // Check if project's directory is a symlink
+                if (!relativeInfo.Attributes.HasFlag(FolderSymlinkAttributes)) 
+                    continue;
+                
+                // Compare metadata of outside directory with a directories within the project
+                if (!CompareDirectories(absoluteInfo, relativeInfo)) 
+                    continue;
+                
+                // Found symlink within the project, assign it
+                relativePath = fullPath;
+                return true;
+            }
+
+            relativePath = string.Empty;
+            return false;
+        }
+        
+        private static bool CompareDirectories(DirectoryInfo directory, DirectoryInfo directory2)
+        {
+            var contents = directory.EnumerateFileSystemInfos("*", SearchOption.AllDirectories).GetEnumerator();
+            var contents2 = directory2.EnumerateFileSystemInfos("*", SearchOption.AllDirectories).GetEnumerator();
+
+            while (true)
+            {
+                var firstNext = contents.MoveNext();
+                var secondNext = contents2.MoveNext();
+
+                if (firstNext != secondNext)
+                    return false;
+
+                if (!firstNext && !secondNext)
+                    break;
+
+                var equals = contents.Current?.Name == contents2.Current?.Name 
+                             && contents.Current?.LastWriteTime == contents2.Current?.LastWriteTime;
+
+                if (!equals)
+                    return false;
+            }
+
+            return true;
+        }
+        
+    }
+}