Improve performance of Update before deploying.

Kudu.Client/SourceControl/RemoteRepository.cs

@@ -107,6 +107,13 @@ public void Update(string id)
             _client.PostAsync("update", HttpClientHelper.CreateJsonContent(new KeyValuePair<string, string>("id", id)))
                    .Result
                    .EnsureSuccessful();
-        }        
+        }
+
+        public void Update()
+        {
+            _client.PostAsync("update", new StringContent(String.Empty))
+                   .Result
+                   .EnsureSuccessful();
+        }
     }
 }

Kudu.Contracts/SourceControl/IRepository.cs

@@ -18,6 +18,7 @@ public interface IRepository
         void RevertFile(string path);
         ChangeSet Commit(string authorName, string message);
         void Update(string id);
+        void Update();
         void Push();
     }
 }

Kudu.Core/Deployment/DeploymentManager.cs

@@ -127,7 +127,7 @@ public IEnumerable<LogEntry> GetLogEntryDetails(string id, string entryId)
                 {
                     throw new InvalidOperationException(String.Format("No log found for '{0}'.", id));
                 }
-                
+
                 return new XmlLogger(_fileSystem, path).GetLogEntryDetails(entryId).ToList();
             }
         }
@@ -186,7 +186,7 @@ public void Deploy(string id)
             }
 
         }
-        
+
         public void Deploy()
         {
             IRepository repository = _repositoryManager.GetRepository();
@@ -202,35 +202,19 @@ public void Deploy()
             try
             {
                 deployStep = profiler.Step("Deploy");
-                string id = repository.CurrentId;
 
+                // Store the current head
+                string id = repository.CurrentId;
+
                 using (profiler.Step("Update to specific changeset"))
                 {
-                    if (String.IsNullOrEmpty(id))
-                    {
-                        id = repository.GetChanges(0, 1).Single().Id;
-                        repository.Update(id);
-                    }
-
-                    Branch activeBranch = (from b in repository.GetBranches()
-                                           let change = repository.GetDetails(b.Id)
-                                           orderby change.ChangeSet.Timestamp descending
-                                           select b).FirstOrDefault();
+                    // Update to the default branch
+                    repository.Update();
 
-                    if (activeBranch != null)
-                    {
-                        // Only deploy if the active branch is the master branch
-                        if (!activeBranch.IsMaster)
-                        {
-                            return;
-                        }
-
-                        repository.Update(activeBranch.Name);
-                        id = activeBranch.Id;
-                    }
-                    else
+                    // The default branch wasn't pushed then noop
+                    if (id != repository.CurrentId)
                     {
-                        repository.Update(id);
+                        return;
                     }
                 }
 

Kudu.Core/SourceControl/Git/GitExeRepository.cs

@@ -154,6 +154,11 @@ public void Update(string id)
             _gitExe.Execute("checkout {0} --force", id);
         }
 
+        public void Update()
+        {
+            Update("master");
+        }
+
         public ChangeSetDetail GetDetails(string id)
         {
             string show = _gitExe.Execute("show {0} -m -p --numstat --shortstat", id);
@@ -721,6 +726,6 @@ public static DiffRange Parse(IStringReader reader)
                 reader.Skip("@@");
                 return range;
             }
-        }        
+        }
     }
 }

Kudu.Core/SourceControl/Git/HybridGitRepository.cs

@@ -101,12 +101,18 @@ public void Update(string id)
             _exeRepository.Update(id);
         }
 
+        public void Update()
+        {
+            _exeRepository.Update();
+        }
+
         public void Dispose()
         {
             if (_libgitRepository != null)
             {
                 _libgitRepository.Dispose();
             }
-        }        
+        }
+
     }
 }

Kudu.Core/SourceControl/Git/LibGitRepository.cs

@@ -82,6 +82,11 @@ public void Update(string id)
             throw new NotImplementedException();
         }
 
+        public void Update()
+        {
+            throw new NotImplementedException();
+        }
+
         public IEnumerable<ChangeSet> GetChanges()
         {
             return Repository.Commits.Select(CreateChangeSet);

Kudu.Core/SourceControl/Hg/HgRepository.cs

@@ -157,6 +157,11 @@ public void Update(string id)
             _repository.Update(id);
         }
 
+        public void Update()
+        {
+            Update("default");
+        }
+
         public IEnumerable<Branch> GetBranches()
         {
             // Need to work around a bug in Mercurial.net where it fails to parse the output of 

Kudu.Core/SourceControl/NullRepository.cs

@@ -88,5 +88,11 @@ public ChangeSet GetChangeSet(string id)
         {
             return null;
         }
+
+
+        public void Update()
+        {
+
+        }
     }
 }

Kudu.Services/SourceControl/SourceControlService.cs

@@ -106,6 +106,13 @@ public void Update(JsonObject input)
             _repository.Update((string)input["id"]);
         }
 
+        [Description("Updates the repository to the default changeset.")]
+        [WebInvoke(UriTemplate = "update")]
+        public void Update()
+        {
+            _repository.Update();
+        }
+
         [Description("Pushes all commited changes to the remote repository.")]
         [WebInvoke(UriTemplate = "push")]
         public void Push()