From 6e8337c563e4beda2912f7d9da3239e5ee4b958c Mon Sep 17 00:00:00 2001
From: Davide Giacometti <davide.giacometti@outlook.it>
Date: Tue, 3 Nov 2020 10:36:16 +0100
Subject: [PATCH] [PT Run] Folder path starting with backslash (#7711)

* folder plugin path starting with backslash

* handle single \ input
---
 .../Sources/Path/FolderHelper.cs                     | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/modules/launcher/Plugins/Microsoft.Plugin.Folder/Sources/Path/FolderHelper.cs b/src/modules/launcher/Plugins/Microsoft.Plugin.Folder/Sources/Path/FolderHelper.cs
index 41cff7a8ce..6e18018bb8 100644
--- a/src/modules/launcher/Plugins/Microsoft.Plugin.Folder/Sources/Path/FolderHelper.cs
+++ b/src/modules/launcher/Plugins/Microsoft.Plugin.Folder/Sources/Path/FolderHelper.cs
@@ -5,6 +5,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
+using System.IO;
 using System.Linq;
 
 namespace Microsoft.Plugin.Folder.Sources
@@ -78,6 +79,17 @@ namespace Microsoft.Plugin.Folder.Sources
 
         public static string Expand(string search)
         {
+            if (search == null)
+            {
+                throw new ArgumentNullException(nameof(search));
+            }
+
+            // Absolute path of system drive: \Windows\System32
+            if (search[0] == '\\' && (search.Length == 1 || search[1] != '\\'))
+            {
+                search = Path.Combine(Path.GetPathRoot(Environment.SystemDirectory), search.Substring(1));
+            }
+
             return Environment.ExpandEnvironmentVariables(search);
         }
     }