[release/6.0] Build ProjectTemplates in Source-Build (#40840)

* Revert "Revert "[release/6.0] Build ProjectTemplates in Source-Build (#40650)" (#40805)"

This reverts commit a351c43.

* Update Microsoft.Authentication.WebAssembly.Msal.csproj
* Update Microsoft.AspNetCore.Components.WebAssembly.Authentication.csproj
* Update Microsoft.Authentication.WebAssembly.Msal.csproj
* Update Microsoft.AspNetCore.Components.WebAssembly.Authentication.csproj

* Workaround

Author: wtgodbe

Directory.Build.props

@@ -30,6 +30,9 @@
           $(MSBuildProjectName.EndsWith('.Test')) OR
           $(MSBuildProjectName.EndsWith('.FunctionalTest')) ) ">true</IsUnitTestProject>
     <IsTestAssetProject Condition=" $(RepoRelativeProjectDir.Contains('testassets')) OR $(MSBuildProjectName.Contains('TestCommon'))">true</IsTestAssetProject>
+    <IsProjectTemplateProject Condition=" ($(RepoRelativeProjectDir.Contains('ProjectTemplates')) OR $(MSBuildProjectName.Contains('ProjectTemplates')) ) AND
+        '$(IsUnitTestProject)' != 'true' AND
+        '$(IsTestAssetProject)' != 'true' ">true</IsProjectTemplateProject>
     <IsSampleProject Condition=" $(RepoRelativeProjectDir.ToUpperInvariant().Contains('SAMPLE')) ">true</IsSampleProject>
     <IsAnalyzersProject Condition="$(MSBuildProjectName.EndsWith('.Analyzers'))">true</IsAnalyzersProject>
     <IsShipping Condition=" '$(IsSampleProject)' == 'true' OR

Directory.Build.targets

@@ -1,10 +1,15 @@
 <Project>
 
   <PropertyGroup>
-    <!-- Only build Microsoft.AspNetCore.App, Microsoft.AspNetCore.App.Ref, and ref/ assemblies in source build. -->
+    <!-- Only build Microsoft.AspNetCore.App, Microsoft.AspNetCore.App.Ref, ref/ assemblies, and ProjectTemplates in source build. -->
     <!-- Analyzer package are needed in source build for WebSDK -->
     <ExcludeFromSourceBuild
-        Condition="'$(ExcludeFromSourceBuild)' == '' and '$(DotNetBuildFromSource)' == 'true' and '$(IsAspNetCoreApp)' != 'true' and '$(MSBuildProjectName)' != '$(TargetingPackName)' and '$(IsAnalyzersProject)' != 'true'">true</ExcludeFromSourceBuild>
+        Condition="'$(ExcludeFromSourceBuild)' == '' and 
+            '$(DotNetBuildFromSource)' == 'true' and 
+            '$(IsAspNetCoreApp)' != 'true' and 
+            '$(MSBuildProjectName)' != '$(TargetingPackName)' and 
+            '$(IsAnalyzersProject)' != 'true' and 
+            '$(IsProjectTemplateProject)' != 'true'">true</ExcludeFromSourceBuild>
 
     <!-- If the user has specified that they want to skip building any test related projects with SkipTestBuild,
      suppress all targets for TestProjects using ExcludeFromBuild. -->

src/Components/WebAssembly/Authentication.Msal/src/Microsoft.Authentication.WebAssembly.Msal.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
-  <Sdk Name="Yarn.MSBuild" />
+  <Import Project="Sdk.props" Sdk="Yarn.MSBuild" Condition=" '$(DotNetBuildFromSource)' != 'true'" />
 
   <PropertyGroup>
     <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
@@ -25,6 +25,7 @@
   <PropertyGroup>
     <YarnWorkingDir>$(MSBuildThisFileDirectory)Interop\</YarnWorkingDir>
     <ResolveStaticWebAssetsInputsDependsOn>
+      CheckForSourceBuild;
       CompileInterop;
       IncludeCompileInteropOutput;
       $(ResolveStaticWebAssetsInputsDependsOn)
@@ -91,5 +92,11 @@
       <FileWrites Include="$(_InteropBuildOutput)" />
     </ItemGroup>
   </Target>
+   
+  <Target Name="CheckForSourceBuild" Condition=" '$(DotNetBuildFromSource)' == 'true'">
+    <Error Text="The Yarn.Msbuild SDK is currently excluded from SourceBuild. If you are enabling this project for SourceBuild, remove the condition on the Yarn.Msbuild SDK above." />
+  </Target>
 
+  <Import Project="Sdk.targets" Sdk="Yarn.MSBuild" Condition=" '$(DotNetBuildFromSource)' != 'true'" />
+   
 </Project>

src/Components/WebAssembly/WebAssembly.Authentication/src/Microsoft.AspNetCore.Components.WebAssembly.Authentication.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
-  <Sdk Name="Yarn.MSBuild" />
+  <Import Project="Sdk.props" Sdk="Yarn.MSBuild" Condition=" '$(DotNetBuildFromSource)' != 'true'" />
 
   <PropertyGroup>
     <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
@@ -26,6 +26,7 @@
   <PropertyGroup>
     <YarnWorkingDir>$(MSBuildThisFileDirectory)Interop\</YarnWorkingDir>
     <ResolveStaticWebAssetsInputsDependsOn>
+      CheckForSourceBuild;
       CompileInterop;
       IncludeCompileInteropOutput;
       $(ResolveStaticWebAssetsInputsDependsOn)
@@ -93,4 +94,10 @@
     </ItemGroup>
   </Target>
 
+  <Target Name="CheckForSourceBuild" Condition=" '$(DotNetBuildFromSource)' == 'true'">
+    <Error Text="The Yarn.Msbuild SDK is currently excluded from SourceBuild. If you are enabling this project for SourceBuild, remove the condition on the Yarn.Msbuild SDK above." />
+  </Target>
+
+  <Import Project="Sdk.targets" Sdk="Yarn.MSBuild" Condition=" '$(DotNetBuildFromSource)' != 'true'" />
+
 </Project>