Add public StartClone() method

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 
 - [SIL.Chorus.LibChorus] Add webm as additional audio file type
+- [SIL.Chorus] Add ability to clone project without direct user interaction
 
 ### Changed
 

src/Chorus/UI/Clone/GetCloneFromInternetDialog.cs

@@ -96,6 +96,38 @@ public GetCloneFromInternetDialog(GetCloneFromInternetModel model)
 
 		}
 
+
+		/// <summary>
+		/// Performs a clone operation with the supplied information.
+		/// <param name="username">Username for Mercurial authentication</param>
+		/// <param name="password">Password for Mercurial authentication</param>
+		/// <param name="projectFolder">The parent directory to put the clone in</param>
+		/// <param name="projectName">Name for the project on the local machine</param>
+		/// <param name="projectUri">URI where the project can be found</param>
+		/// </summary>
+		public static CloneResult DoClone(string username, string password, string projectFolder, string projectName, Uri projectUri)
+		{
+			var model = new GetCloneFromInternetModel(projectFolder)
+			{
+				Username = username,
+				Password = password,
+				CustomUrl = projectUri.ToString(),
+				IsCustomUrl = true,
+				LocalFolderName = projectName
+			};
+
+			var dialog = new GetCloneFromInternetDialog(model);
+			DialogResult? res = null;
+			dialog.FormClosing += (sender, args) => res = dialog.DialogResult;
+
+			dialog.Show();
+			dialog.StartClone();
+			Application.Run(dialog);
+
+			var cloneStatus = res == DialogResult.OK ? CloneStatus.Created : CloneStatus.NotCreated;
+			return new CloneResult(dialog.PathToNewlyClonedFolder, cloneStatus);
+		}
+
 		private void _backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
 		{
 			if (_statusProgress.ErrorEncountered)
@@ -261,11 +293,16 @@ private void _cancelButton_Click(object sender, EventArgs e)
 		}
 
 		private void OnDownloadClick(object sender, EventArgs e)
+		{
+			StartClone();
+		}
+
+		private void StartClone()
 		{
 			lock (this)
 			{
 				_logBox.Clear();
-				if(_backgroundWorker.IsBusy)
+				if (_backgroundWorker.IsBusy)
 					return;
 				UpdateDisplay(State.MakingClone);
 				_model.SaveUserSettings();
@@ -275,7 +312,6 @@ private void OnDownloadClick(object sender, EventArgs e)
 			}
 		}
 
-
 		public string ThreadSafeUrl
 		{
 			get;