[msbuild] Don't override GetTargetPath/Build/Rebuild for app extensions. Fixes #23516.

Don't override the GetTargetPath/Build/Rebuild targets for app extensions,
because we also override some of these targets when building remotely, and the
custom logic for app extensions is overridden.

Instead create new targets that depend on those we previously override
instead.

Fixes #23516.

Author: rolfbjarne

msbuild/Xamarin.Shared/Xamarin.Mac.AppExtension.Common.targets

@@ -25,17 +25,6 @@ Copyright (C) 2013-2014 Xamarin. All rights reserved.
 
 	<Import Project="$(MSBuildThisFileDirectory)$(MSBuildThisFileName).Before.targets" 
 			Condition="Exists('$(MSBuildThisFileDirectory)$(MSBuildThisFileName).Before.targets')"/>
-  
-	<!-- Override GetTargetPath, Build, and Rebuild -->
-	<Target Name="GetBundleTargetPath" DependsOnTargets="_GenerateBundleName;$(GetTargetPathDependsOn)" Outputs="@(_AppExtensionBundlePath)" />
-	<Target Name="Build"   Condition="'$(_InvalidConfigurationWarning)' != 'true'" DependsOnTargets="_EnabledLocalSigning;_GenerateBundleName;$(BuildDependsOn)" Outputs="$(_AppExtensionBundlePath)" />
-	<Target Name="Rebuild" Condition="'$(_InvalidConfigurationWarning)' != 'true'" DependsOnTargets="_EnabledLocalSigning;_GenerateBundleName;$(RebuildDependsOn)" Outputs="$(_AppExtensionBundlePath)" />
-
-	<Target Name="_EnabledLocalSigning" DependsOnTargets="_DetectSigningIdentity">
-		<PropertyGroup>
-			<CodesignEntitlements Condition="'$(CodesignEntitlements)' == ''">Entitlements.plist</CodesignEntitlements>
-		</PropertyGroup>
-	</Target>
 
 	<Target Name="CreateIpa"/>
 

msbuild/Xamarin.Shared/Xamarin.Shared.targets

@@ -2596,6 +2596,10 @@ Copyright (C) 2018 Microsoft. All rights reserved.
 
 	<!-- App extensions -->
 
+	<Target Name="GetAppExtensionBundlePath" DependsOnTargets="_GenerateBundleName;$(GetTargetPathDependsOn)" Outputs="@(_AppExtensionBundlePath)" />
+
+	<Target Name="BuildAndGetAppExtensionBundlePath" DependsOnTargets="Build" Outputs="@(_AppExtensionBundlePath)" />
+
 	<Target Name="_AssignAppExtensionConfiguration" Condition="'@(_AppExtensionReference)' != ''">
 		<!-- assign configs if building a solution file -->
 		<AssignProjectConfiguration
@@ -2643,10 +2647,10 @@ Copyright (C) 2018 Microsoft. All rights reserved.
 			<_BuildReferencedExtensionProjects Condition="'$(BuildingInsideVisualStudio)' != 'true'">true</_BuildReferencedExtensionProjects>
 		</PropertyGroup>
 
-		<!-- If the referenced projects have already been built, then just get the target paths -->
+		<!-- If the referenced projects have already been built, then just get the app extensions' bundle paths -->
 		<MSBuild
 			Projects="@(_AppExtensionReferenceWithConfigurationExistent)"
-			Targets="GetBundleTargetPath"
+			Targets="GetAppExtensionBundlePath"
 			Properties="%(_AppExtensionReferenceWithConfigurationExistent.SetConfiguration); %(_AppExtensionReferenceWithConfigurationExistent.SetPlatform)"
 			Condition="'@(_AppExtensionReferenceWithConfigurationExistent)' != '' and '$(_BuildReferencedExtensionProjects)' != 'true'">
 
@@ -2656,6 +2660,7 @@ Copyright (C) 2018 Microsoft. All rights reserved.
 		<!-- Build the referenced project if required -->
 		<MSBuild
 			Projects="@(_AppExtensionReferenceWithConfigurationExistent)"
+			Targets="BuildAndGetAppExtensionBundlePath"
 			Properties="%(_AppExtensionReferenceWithConfigurationExistent.SetConfiguration); %(_AppExtensionReferenceWithConfigurationExistent.SetPlatform)"
 			Condition="'@(_AppExtensionReferenceWithConfigurationExistent)' != '' and '$(_BuildReferencedExtensionProjects)' == 'true' ">
 

msbuild/Xamarin.Shared/Xamarin.TVOS.AppExtension.Common.targets

@@ -33,11 +33,6 @@ Copyright (C) 2014-2016 Xamarin. All rights reserved.
 	<Import Project="$(MSBuildThisFileDirectory)$(MSBuildThisFileName).Before.targets"
 			Condition="Exists('$(MSBuildThisFileDirectory)$(MSBuildThisFileName).Before.targets')"/>
 
-	<!-- Override GetTargetPath, Build, and Rebuild -->
-	<Target Name="GetBundleTargetPath" DependsOnTargets="_GenerateBundleName;$(GetTargetPathDependsOn)" Outputs="@(_AppExtensionBundlePath)" />
-	<Target Name="Build"   Condition="'$(_InvalidConfigurationWarning)' != 'true'" DependsOnTargets="_GenerateBundleName;$(BuildDependsOn)" Outputs="@(_AppExtensionBundlePath)" />
-	<Target Name="Rebuild" Condition="'$(_InvalidConfigurationWarning)' != 'true'" DependsOnTargets="_GenerateBundleName;$(RebuildDependsOn)" Outputs="@(_AppExtensionBundlePath)" />
-
 	<Import Project="$(MSBuildThisFileDirectory)$(MSBuildThisFileName).After.targets"
 			Condition="Exists('$(MSBuildThisFileDirectory)$(MSBuildThisFileName).After.targets')"/>
 

msbuild/Xamarin.Shared/Xamarin.iOS.AppExtension.Common.targets

@@ -26,11 +26,6 @@ Copyright (C) 2014-2016 Xamarin. All rights reserved.
 
 	<Import Project="$(MSBuildThisFileDirectory)$(MSBuildThisFileName).Before.targets" 
 			Condition="Exists('$(MSBuildThisFileDirectory)$(MSBuildThisFileName).Before.targets')"/>
-	
-	<!-- Override GetTargetPath, Build, and Rebuild -->
-	<Target Name="GetBundleTargetPath" DependsOnTargets="_GenerateBundleName;$(GetTargetPathDependsOn)" Outputs="@(_AppExtensionBundlePath)" />
-	<Target Name="Build"   Condition="'$(_InvalidConfigurationWarning)' != 'true'" DependsOnTargets="_GenerateBundleName;$(BuildDependsOn)" Outputs="@(_AppExtensionBundlePath)" />
-	<Target Name="Rebuild" Condition="'$(_InvalidConfigurationWarning)' != 'true'" DependsOnTargets="_GenerateBundleName;$(RebuildDependsOn)" Outputs="@(_AppExtensionBundlePath)" />
 
 	<Import Project="$(MSBuildThisFileDirectory)$(MSBuildThisFileName).After.targets"
 			Condition="Exists('$(MSBuildThisFileDirectory)$(MSBuildThisFileName).After.targets')"/>

msbuild/Xamarin.Shared/Xamarin.iOS.Common.targets

@@ -235,7 +235,7 @@ Copyright (C) 2013-2016 Xamarin. All rights reserved.
 		<!-- If the referenced projects have already been built, then just get the target paths -->
 		<MSBuild
 			Projects="@(_WatchAppReferenceWithConfigurationExistent)"
-			Targets="GetBundleTargetPath"
+			Targets="GetAppExtensionBundlePath"
 			Properties="%(_WatchAppReferenceWithConfigurationExistent.SetConfiguration); %(_WatchAppReferenceWithConfigurationExistent.SetPlatform)"
 			Condition="'@(_WatchAppReferenceWithConfigurationExistent)' != '' and '$(_BuildReferencedExtensionProjects)' != 'true'">