Merge pull request #511 from RaphHaddad/issue-203

Issue 203

Author: JakeGinnivan

GitVersionCore/GitPreparer.cs

@@ -150,12 +150,7 @@ static string CreateDynamicRepository(string targetPath, Authentication authenti
 
             Logger.WriteInfo(string.Format("Retrieving git info from url '{0}'", repositoryUrl));
 
-            Repository.Clone(repositoryUrl, gitDirectory,
-                new CloneOptions
-                {
-                    Checkout = false,
-                    CredentialsProvider = (url, usernameFromUrl, types) => credentials
-                });
+            CloneRepository(repositoryUrl, gitDirectory, credentials);
 
             // Normalize (download branches) before using the branch
             GitHelper.NormalizeGitDirectory(gitDirectory, authentication, noFetch);
@@ -200,6 +195,38 @@ static string CreateDynamicRepository(string targetPath, Authentication authenti
             return gitDirectory;
         }
 
+        private static void CloneRepository(string repositoryUrl, string gitDirectory, Credentials credentials)
+        {
+            try
+            {
+                Repository.Clone(repositoryUrl, gitDirectory,
+                    new CloneOptions
+                    {
+                        Checkout = false,
+                        CredentialsProvider = (url, usernameFromUrl, types) => credentials
+                    });
+            }
+            catch (LibGit2SharpException ex)
+            {
+                var message = ex.Message;
+                if (message.Contains("401"))
+                {
+                    throw new Exception("Unauthorised: Incorrect username/password");
+                }
+                if (message.Contains("403"))
+                {
+                    throw new Exception("Forbidden: Possbily Incorrect username/password");
+                }
+                if (message.Contains("404"))
+                {
+                    throw new Exception("Not found: The repository was not found");
+                }
+                
+                throw new Exception("There was an unknown problem with the Git repository you provided");
+
+            }
+        }
+
         private static Reference GetLocalReference(Repository repository, string branchName)
         {
             var targetBranchName = branchName.GetCanonicalBranchName();

GitVersionExe.Tests/GitPreparerTests.cs

@@ -275,5 +275,31 @@ public void UsingDynamicRepositoryWithoutTargetBranchFails()
         }
     }
 
+    [Test]
+    public void TestErrorThrownForInvalidRepository()
+    {
+        var repoName = Guid.NewGuid().ToString();
+        var tempPath = Path.GetTempPath();
+        var tempDir = Path.Combine(tempPath, repoName);
+        Directory.CreateDirectory(tempDir);
+
+        try
+        {
+            var arguments = new Arguments
+            {
+                TargetPath = tempDir,
+                TargetUrl = "http://127.0.0.1/testrepo.git"
+            };
+
+            var gitPreparer = new GitPreparer(arguments.TargetUrl, arguments.DynamicRepositoryLocation, arguments.Authentication, arguments.TargetBranch, arguments.NoFetch, arguments.TargetPath);
+
+            Assert.Throws<Exception>(() => gitPreparer.Initialise(true));
+        }
+        finally
+        {
+            Directory.Delete(tempDir, true);
+        }
+    }
+
     // TODO test around normalisation
 }