Always run ReadItemsFromFile and WriteItemsFromFile locally

As these operations just read/write items from/to an XML file, this is something we don't need to run remotely when building from Windows. This improves the build performance and also fixes some inconsistencies we had were sometimes files were written locally and read remotely (or the other way around).

Author: emaf

dotnet/targets/Xamarin.Shared.Sdk.targets

@@ -1018,7 +1018,7 @@
 			<_ExistingLinkerItemFiles Include="@(_LinkerItemFiles)" Condition="Exists('%(Identity)')" />
 		</ItemGroup>
 
-		<ReadItemsFromFile SessionId="$(BuildSessionId)" File="@(_ExistingLinkerItemFiles)" Condition="'@(_ExistingLinkerItemFiles)' != ''">
+		<ReadItemsFromFile File="@(_ExistingLinkerItemFiles)" Condition="'@(_ExistingLinkerItemFiles)' != ''">
 			<Output TaskParameter="Items" ItemName="_AllLinkerItems" />
 		</ReadItemsFromFile>
 
@@ -1868,7 +1868,6 @@
 	<!-- When we're building a universal app, we need to collect the list of user frameworks we need to run dsymutil on -->
 	<Target Name="_CollectRidSpecificUserFrameworksWithoutDebugSymbols">
 		<ReadItemsFromFile
-			SessionId="$(BuildSessionId)"
 			File="%(_RidSpecificUserFrameworksWithoutDebugSymbolsPath.Identity)"
 			Condition="Exists('%(_RidSpecificUserFrameworksWithoutDebugSymbolsPath.Identity)')"
 		>
@@ -1889,9 +1888,8 @@
 
 		<!-- Read the stored list of files to sign if we're an outer build of a multi-rid build -->
 		<ReadItemsFromFile
-			SessionId="$(BuildSessionId)"
 			File="%(_RidSpecificCodesignItemsPath.Identity)"
-			Condition="@(_RidSpecificCodesignItemsPath->Count()) &gt; 0 And '$(IsMacEnabled)' == 'true'"
+			Condition="@(_RidSpecificCodesignItemsPath->Count()) &gt; 0"
 		>
 			<Output TaskParameter="Items" ItemName="_RidSpecificCodesignItems" />
 		</ReadItemsFromFile>
@@ -2201,8 +2199,7 @@
 
 		<!-- Write a list of files to sign if we're not an outer build of a multi-rid build -->
 		<WriteItemsToFile
-			SessionId="$(BuildSessionId)"
-			Condition="'$(IsMacEnabled)' == 'true' And '$(_CodesignItemsPath)' != ''"
+			Condition="'$(_CodesignItemsPath)' != ''"
 			Items="@(_CreateDumpExecutableToSign)"
 			ItemName="_CodesignItems"
 			File="$(_CodesignItemsPath)"

msbuild/Xamarin.MacDev.Tasks/Tasks/ReadItemsFromFile.cs

@@ -8,10 +8,8 @@
 using Microsoft.Build.Tasks;
 using System.Xml.Linq;
 
-using Xamarin.Messaging.Build.Client;
-
 namespace Xamarin.MacDev.Tasks {
-	public class ReadItemsFromFile : XamarinTask, ITaskCallback {
+	public class ReadItemsFromFile : XamarinTask {
 		static readonly XNamespace XmlNs = XNamespace.Get ("http://schemas.microsoft.com/developer/msbuild/2003");
 
 		static readonly XName ItemGroupElementName = XmlNs + "ItemGroup";
@@ -34,9 +32,6 @@ public class ReadItemsFromFile : XamarinTask, ITaskCallback {
 
 		public override bool Execute ()
 		{
-			if (ShouldExecuteRemotely ())
-				return new TaskRunner (SessionId, BuildEngine4).RunAsync (this).Result;
-
 			var result = new List<ITaskItem> ();
 			foreach (var file in File) {
 				// XDocument.Load(string) takes a string to a URI, not a file path, so with certain characters that becomes a problem.
@@ -73,11 +68,5 @@ ITaskItem CreateItemFromElement (XElement element, string sourceFile)
 
 			return item;
 		}
-
-		public bool ShouldCopyToBuildServer (ITaskItem item) => false;
-
-		public bool ShouldCreateOutputFile (ITaskItem item) => false;
-
-		public IEnumerable<ITaskItem> GetAdditionalItemsToBeCopied () => Enumerable.Empty<ITaskItem> ();
 	}
 }

msbuild/Xamarin.MacDev.Tasks/Tasks/WriteItemsToFile.cs

@@ -8,10 +8,8 @@
 using Microsoft.Build.Tasks;
 using System.Xml.Linq;
 
-using Xamarin.Messaging.Build.Client;
-
 namespace Xamarin.MacDev.Tasks {
-	public class WriteItemsToFile : XamarinTask, ICancelableTask {
+	public class WriteItemsToFile : XamarinTask {
 		static readonly XNamespace XmlNs = XNamespace.Get ("http://schemas.microsoft.com/developer/msbuild/2003");
 
 		static readonly XName ProjectElementName = XmlNs + "Project";
@@ -36,9 +34,6 @@ public class WriteItemsToFile : XamarinTask, ICancelableTask {
 
 		public override bool Execute ()
 		{
-			if (ShouldExecuteRemotely ())
-				return new TaskRunner (SessionId, BuildEngine4).RunAsync (this).Result;
-
 			Write (this, File?.ItemSpec, Items, ItemName, Overwrite, IncludeMetadata);
 			return true;
 		}
@@ -83,11 +78,5 @@ static IEnumerable<XElement> CreateMetadataFromItem (ITaskItem item, bool includ
 
 			return Enumerable.Empty<XElement> ();
 		}
-
-		public void Cancel ()
-		{
-			if (ShouldExecuteRemotely ())
-				BuildConnection.CancelAsync (BuildEngine4).Wait ();
-		}
 	}
 }

msbuild/Xamarin.Shared/Xamarin.Shared.targets

@@ -2456,8 +2456,6 @@ Copyright (C) 2018 Microsoft. All rights reserved.
 		>
 
 		<WriteItemsToFile
-			Condition="'$(IsMacEnabled)' == 'true'"
-			SessionId="$(BuildSessionId)"
 			Items="@(_CodesignBundle)"
 			ItemName="_CodesignBundle"
 			File="$(DeviceSpecificOutputPath)codesign-bundle.items"
@@ -2466,8 +2464,6 @@ Copyright (C) 2018 Microsoft. All rights reserved.
 		/>
 
 		<WriteItemsToFile
-			Condition="'$(IsMacEnabled)' == 'true'"
-			SessionId="$(BuildSessionId)"
 			Items="@(_CodesignItems)"
 			ItemName="_CodesignItems"
 			File="$(DeviceSpecificOutputPath)codesign.items"
@@ -2927,7 +2923,7 @@ Copyright (C) 2018 Microsoft. All rights reserved.
 		>
 
 		<WriteItemsToFile
-			Condition="'$(IsMacEnabled)' == 'true' And '$(_PostProcessingItemPath)' != ''"
+			Condition="'$(_PostProcessingItemPath)' != ''"
 			Items="@(_PostProcessingItem)"
 			ItemName="_PostProcessingItem"
 			File="$(_PostProcessingItemPath)"