[msbuild] Merge the Ditto[TaskBase] classes. (#19661)

msbuild/Xamarin.MacDev.Tasks/Tasks/DittoTaskBase.cs

@@ -3,12 +3,15 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 
 using Microsoft.Build.Framework;
 using Microsoft.Build.Utilities;
 
+using Xamarin.Messaging.Build.Client;
+
 namespace Xamarin.MacDev.Tasks {
-	public abstract class DittoTaskBase : XamarinToolTask {
+	public class Ditto : XamarinToolTask, ITaskCallback {
 		#region Inputs
 
 		public string? AdditionalArguments { get; set; }
@@ -65,6 +68,14 @@ protected override string GenerateCommandLineCommands ()
 
 		public override bool Execute ()
 		{
+			if (ShouldExecuteRemotely ()) {
+				var taskRunner = new TaskRunner (SessionId, BuildEngine4);
+
+				taskRunner.FixReferencedItems (new ITaskItem [] { Source! });
+
+				return taskRunner.RunAsync (this).Result;
+			}
+
 			if (!base.Execute ())
 				return false;
 
@@ -90,5 +101,31 @@ protected override void LogEventsFromTextOutput (string singleLine, MessageImpor
 			// TODO: do proper parsing of error messages and such
 			Log.LogMessage (messageImportance, "{0}", singleLine);
 		}
+
+		public override void Cancel ()
+		{
+			base.Cancel ();
+
+			if (ShouldExecuteRemotely ())
+				BuildConnection.CancelAsync (BuildEngine4).Wait ();
+		}
+
+		public IEnumerable<ITaskItem> GetAdditionalItemsToBeCopied ()
+		{
+			if (!Directory.Exists (Source!.ItemSpec))
+				return Enumerable.Empty<ITaskItem> ();
+
+			if (!CopyFromWindows)
+				return Enumerable.Empty<ITaskItem> ();
+
+			// TaskRunner doesn't know how to copy directories to Mac but `ditto` can take directories (and that's why we use ditto often).
+			// If Source is a directory path, let's add each file within it as an TaskItem, as TaskRunner knows how to copy files to Mac.
+			return Directory.GetFiles (Source.ItemSpec, "*", SearchOption.AllDirectories)
+				.Select (f => new TaskItem (f));
+		}
+
+		public bool ShouldCopyToBuildServer (ITaskItem item) => true;
+
+		public bool ShouldCreateOutputFile (ITaskItem item) => true;
 	}
 }