Just test for existing directory.

Rather than .git/HEAD.

Author: grokys

src/GitHub.App/ViewModels/RepositoryCloneViewModel.cs

@@ -153,7 +153,7 @@ IObservable<Unit> OnCloneRepository(object state)
             });
         }
 
-        bool IsAlreadyRepoAtPath(string baseRepositoryPath)
+        bool IsAlreadyRepoAtPath(string path)
         {
             bool isAlreadyRepoAtPath = false;
 
@@ -162,26 +162,14 @@ bool IsAlreadyRepoAtPath(string baseRepositoryPath)
                 var validationResult = BaseRepositoryPathValidator.ValidationResult;
                 if (validationResult != null && validationResult.IsValid)
                 {
-                    string potentialPath = Path.Combine(baseRepositoryPath, SelectedRepository.Name);
-                    isAlreadyRepoAtPath = IsGitRepo(potentialPath);
+                    string potentialPath = Path.Combine(path, SelectedRepository.Name);
+                    isAlreadyRepoAtPath = operatingSystem.Directory.Exists(potentialPath);
                 }
             }
 
             return isAlreadyRepoAtPath;
         }
 
-        bool IsGitRepo(string path)
-        {
-            try
-            {
-                return operatingSystem.File.Exists(Path.Combine(path, ".git", "HEAD"));
-            }
-            catch (PathTooLongException)
-            {
-                return false;
-            }
-        }
-
         /// <summary>
         /// Path to clone repositories into
         /// </summary>

src/UnitTests/GitHub.App/ViewModels/RepositoryCloneViewModelTests.cs

@@ -208,9 +208,9 @@ public void IsInvalidWhenDestinationRepositoryExists()
             repositoryHost.ModelService.GetRepositories().Returns(Observable.Return(new[] { repo }));
             var cloneService = Substitute.For<IRepositoryCloneService>();
             var os = Substitute.For<IOperatingSystem>();
-            var files = Substitute.For<IFileFacade>();
-            os.File.Returns(files);
-            files.Exists(@"c:\foo\bar\.git\HEAD").Returns(true);
+            var directories = Substitute.For<IDirectoryFacade>();
+            os.Directory.Returns(directories);
+            directories.Exists(@"c:\foo\bar").Returns(true);
             var vm = new RepositoryCloneViewModel(
                 repositoryHost,
                 cloneService,