Fixed: Regression causing updater to fail and added measure to restore bad update

src/NzbDrone.Common.Test/DiskTests/DiskTransferServiceFixture.cs

@@ -661,6 +661,23 @@ namespace NzbDrone.Common.Test.DiskTests
             VerifyCopyFolder(original.FullName, destination.FullName);
         }
 
+        [Test]
+        public void MirrorFolder_should_handle_trailing_slash()
+        {
+            WithRealDiskProvider();
+
+            var original = GetFilledTempFolder();
+            var source = new DirectoryInfo(GetTempFilePath());
+            var destination = new DirectoryInfo(GetTempFilePath());
+
+            Subject.TransferFolder(original.FullName, source.FullName, TransferMode.Copy);
+
+            var count = Subject.MirrorFolder(source.FullName + Path.DirectorySeparatorChar, destination.FullName);
+
+            count.Should().Equals(3);
+            VerifyCopyFolder(original.FullName, destination.FullName);
+        }
+
         [Test]
         public void TransferFolder_should_use_movefolder_if_on_same_mount()
         {

src/NzbDrone.Common/Disk/DiskTransferService.cs

@@ -29,13 +29,16 @@ namespace NzbDrone.Common.Disk
         private string ResolveRealParentPath(string path)
         {
             var parentPath = path.GetParentPath();
-            if (!_diskProvider.FolderExists(path))
+            if (!_diskProvider.FolderExists(parentPath))
             {
                 return path;
             }
 
-            parentPath = parentPath.GetActualCasing();
+            var realParentPath = parentPath.GetActualCasing();
-            return parentPath + Path.DirectorySeparatorChar + Path.GetFileName(path);
+
+            var partialChildPath = path.Substring(parentPath.Length);
+
+            return realParentPath + partialChildPath;
         }
         
         public TransferMode TransferFolder(string sourcePath, string targetPath, TransferMode mode)

src/NzbDrone.Update/UpdateEngine/InstallUpdateService.cs

@@ -84,6 +84,13 @@ namespace NzbDrone.Update.UpdateEngine
 
             Verify(installationFolder, processId);
 
+
+            if (installationFolder.EndsWith(@"\bin\Sonarr") || installationFolder.EndsWith(@"/bin/Sonarr"))
+            {
+                installationFolder = installationFolder.GetParentPath();
+                _logger.Info("Fixed Installation Folder: {0}", installationFolder);
+            }
+
             var appType = _detectApplicationType.GetAppType();
 
             _processProvider.FindProcessByName(ProcessProvider.SONARR_CONSOLE_PROCESS_NAME);