From 00bf533696c187aad899b22493e40f56798dd685 Mon Sep 17 00:00:00 2001
From: Mark McDowall <markus.mcd5@gmail.com>
Date: Sun, 8 Sep 2013 10:13:46 -0700
Subject: [PATCH] Empty folder before update instead of deleting it

---
 NzbDrone.Common/DiskProvider.cs                 | 17 ++++++++++++++++-
 .../UpdateEngine/InstallUpdateService.cs        |  2 +-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/NzbDrone.Common/DiskProvider.cs b/NzbDrone.Common/DiskProvider.cs
index 592a7d12c..db49896fe 100644
--- a/NzbDrone.Common/DiskProvider.cs
+++ b/NzbDrone.Common/DiskProvider.cs
@@ -42,6 +42,7 @@ public interface IDiskProvider
         void SetPermissions(string filename, WellKnownSidType accountSid, FileSystemRights rights, AccessControlType controlType);
         bool IsParent(string parentPath, string childPath);
         FileAttributes GetFileAttributes(string path);
+        void EmptyFolder(string path);
     }
 
     public class DiskProvider : IDiskProvider
@@ -352,7 +353,6 @@ public void WriteAllText(string filename, string contents)
             File.WriteAllText(filename, contents);
         }
 
-
         public void FileSetLastWriteTimeUtc(string path, DateTime dateTime)
         {
             Ensure.That(() => path).IsValidPath();
@@ -446,5 +446,20 @@ public FileAttributes GetFileAttributes(string path)
         {
             return File.GetAttributes(path);
         }
+
+        public void EmptyFolder(string path)
+        {
+            Ensure.That(() => path).IsValidPath();
+
+            foreach (var file in GetFiles(path, SearchOption.TopDirectoryOnly))
+            {
+                DeleteFile(file);
+            }
+
+            foreach (var directory in GetDirectories(path))
+            {
+                DeleteFolder(directory, true);
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/NzbDrone.Update/UpdateEngine/InstallUpdateService.cs b/NzbDrone.Update/UpdateEngine/InstallUpdateService.cs
index 13626a3c7..0323360cc 100644
--- a/NzbDrone.Update/UpdateEngine/InstallUpdateService.cs
+++ b/NzbDrone.Update/UpdateEngine/InstallUpdateService.cs
@@ -64,7 +64,7 @@ public void Start(string installationFolder)
 
                 try
                 {
-                    _diskProvider.DeleteFolder(installationFolder, true);
+                    _diskProvider.EmptyFolder(installationFolder);
                     _diskProvider.CopyFolder(_appFolderInfo.GetUpdatePackageFolder(), installationFolder);
                 }
                 catch (Exception e)