New: Prevent automatic update if UI folder is not writable

src/NzbDrone.Core.Test/HealthCheck/Checks/UpdateCheckFixture.cs

@@ -22,8 +22,8 @@ namespace NzbDrone.Core.Test.HealthCheck.Checks
                   .Setup(s => s.StartUpFolder)
                   .Returns(@"C:\NzbDrone");
 
-            Mocker.GetMock<NzbDrone.Common.Disk.IDiskProvider>()
-                  .Setup(c => c.FolderWritable(Moq.It.IsAny<string>()))
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(c => c.FolderWritable(It.IsAny<string>()))
                   .Returns(false);
 
             Subject.Check().ShouldBeError();
@@ -34,16 +34,45 @@ namespace NzbDrone.Core.Test.HealthCheck.Checks
         {
             MonoOnly();
 
+            const string startupFolder = @"/opt/nzbdrone";
+
             Mocker.GetMock<IConfigFileProvider>()
                   .Setup(s => s.UpdateAutomatically)
                   .Returns(true);
 
             Mocker.GetMock<IAppFolderInfo>()
                   .Setup(s => s.StartUpFolder)
-                  .Returns(@"/opt/nzbdrone");
+                  .Returns(startupFolder);
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(c => c.FolderWritable(startupFolder))
+                  .Returns(false);
+
+            Subject.Check().ShouldBeError();
+        }
+
+        [Test]
+        public void should_return_error_when_ui_folder_is_write_protected_and_update_automatically_is_enabled()
+        {
+            MonoOnly();
+
+            const string startupFolder = @"/opt/nzbdrone";
+            const string uiFolder = @"/opt/nzbdrone/UI";
+
+            Mocker.GetMock<IConfigFileProvider>()
+                  .Setup(s => s.UpdateAutomatically)
+                  .Returns(true);
+
+            Mocker.GetMock<IAppFolderInfo>()
+                  .Setup(s => s.StartUpFolder)
+                  .Returns(startupFolder);
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(c => c.FolderWritable(startupFolder))
+                  .Returns(true);
 
-            Mocker.GetMock<NzbDrone.Common.Disk.IDiskProvider>()
-                  .Setup(c => c.FolderWritable(Moq.It.IsAny<string>()))
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(c => c.FolderWritable(uiFolder))
                   .Returns(false);
 
             Subject.Check().ShouldBeError();
@@ -66,8 +95,8 @@ namespace NzbDrone.Core.Test.HealthCheck.Checks
                   .Setup(s => s.StartUpFolder)
                   .Returns(@"/opt/nzbdrone");
 
-            Mocker.GetMock<NzbDrone.Common.Disk.IDiskProvider>()
-                  .Verify(c => c.FolderWritable(Moq.It.IsAny<string>()), Times.Never());
+            Mocker.GetMock<IDiskProvider>()
+                  .Verify(c => c.FolderWritable(It.IsAny<string>()), Times.Never());
 
             Subject.Check().ShouldBeOk();
         }

src/NzbDrone.Core/HealthCheck/Checks/UpdateCheck.cs

@@ -27,15 +27,25 @@ namespace NzbDrone.Core.HealthCheck.Checks
 
         public override HealthCheck Check()
         {
+            var startupFolder = _appFolderInfo.StartUpFolder;
+            var uiFolder = Path.Combine(startupFolder, "UI");
+
             if ((OsInfo.IsWindows || _configFileProvider.UpdateAutomatically) &&
                 _configFileProvider.UpdateMechanism == UpdateMechanism.BuiltIn)
             {
-                if (!_diskProvider.FolderWritable(_appFolderInfo.StartUpFolder))
+                if (!_diskProvider.FolderWritable(startupFolder))
                 {
                     return new HealthCheck(GetType(), HealthCheckResult.Error,
-                        string.Format("Cannot install update because startup folder '{0}' is not writable by the user '{1}'.", _appFolderInfo.StartUpFolder, Environment.UserName),
+                        string.Format("Cannot install update because startup folder '{0}' is not writable by the user '{1}'.", startupFolder, Environment.UserName),
                         "Cannot install update because startup folder is not writable by the user");
                 }
+
+                if (!_diskProvider.FolderWritable(uiFolder))
+                {
+                    return new HealthCheck(GetType(), HealthCheckResult.Error,
+                        string.Format("Cannot install update because UI folder '{0}' is not writable by the user '{1}'.", uiFolder, Environment.UserName),
+                        "Cannot install update because UI folder is not writable by the user");
+                }
             }
 
             if (BuildInfo.BuildDateTime < DateTime.UtcNow.AddDays(-14))

src/NzbDrone.Core/Update/InstallUpdateService.cs

@@ -73,9 +73,17 @@ namespace NzbDrone.Core.Update
 
             if (OsInfo.IsWindows || _configFileProvider.UpdateMechanism != UpdateMechanism.Script)
             {
-                if (!_diskProvider.FolderWritable(_appFolderInfo.StartUpFolder))
+                var startupFolder = _appFolderInfo.StartUpFolder;
+                var uiFolder = Path.Combine(startupFolder, "UI");
+
+                if (!_diskProvider.FolderWritable(startupFolder))
+                {
+                    throw new UpdateFolderNotWritableException("Cannot install update because startup folder '{0}' is not writable by the user '{1}'.", startupFolder, Environment.UserName);
+                }
+
+                if (!_diskProvider.FolderWritable(uiFolder))
                 {
-                    throw new UpdateFolderNotWritableException("Cannot install update because startup folder '{0}' is not writable by the user '{1}'.", _appFolderInfo.StartUpFolder, Environment.UserName);
+                    throw new UpdateFolderNotWritableException("Cannot install update because UI folder '{0}' is not writable by the user '{1}'.", uiFolder, Environment.UserName);
                 }
             }