Allow repos to opt-out of building tests

src/SourceBuild/content/repo-projects/Directory.Build.props

@@ -101,7 +101,6 @@
 
     <!-- Only pass these properites through when necessary to reduce command line noise. -->
     <BuildArgs Condition="'$(CrossBuild)' == 'true'">$(BuildArgs) /p:CrossBuild=true</BuildArgs>
-    <BuildArgs Condition="'$(DotNetBuildTests)' == 'true'">$(BuildArgs) /p:DotNetBuildTests=true</BuildArgs>
     <BuildArgs Condition="'$(NuGetConfigFile)' != ''">$(BuildArgs) /p:RestoreConfigFile=$(NuGetConfigFile)</BuildArgs>
     <BuildArgs Condition="'$(DotNetBuildUseMonoRuntime)' == 'true'">$(BuildArgs) /p:DotNetBuildUseMonoRuntime=$(DotNetBuildUseMonoRuntime)</BuildArgs>
     <BuildArgs Condition="'$(OfficialBuildId)' != ''">$(BuildArgs) /p:OfficialBuildId=$(OfficialBuildId)</BuildArgs>

src/SourceBuild/content/repo-projects/Directory.Build.targets

@@ -37,6 +37,9 @@
     <BuildArgs>$(BuildArgs) /p:PortableBuild=$(PortableBuild)</BuildArgs>
     <BuildArgs Condition="'$(ShortStack)' != 'true' and '$(TargetOS)' != 'linux-musl'">$(BuildArgs) /p:RuntimeOS=$(RuntimeOS)</BuildArgs>
     <BuildArgs Condition="'$(ShortStack)' != 'true' and '$(TargetOS)' != 'linux-musl'">$(BuildArgs) /p:BaseOS=$(BaseOS)</BuildArgs>
+
+    <!-- Only pass when enabled to reduce command line noise. -->
+    <BuildArgs Condition="'$(DotNetBuildTests)' == 'true' and '$(DotNetBuildTestsOptOut)' != 'true'">$(BuildArgs) /p:DotNetBuildTests=true</BuildArgs>
   </PropertyGroup>
 
   <PropertyGroup>

src/SourceBuild/content/repo-projects/aspnetcore.proj

@@ -30,6 +30,9 @@
     <BuildArgs>$(BuildArgs) /p:EnablePackageValidation=false</BuildArgs>
 
     <LogVerbosityOptOut>true</LogVerbosityOptOut>
+
+    <!-- Tests are failing to build: https://github.com/dotnet/aspnetcore/issues/60095 -->
+    <DotNetBuildTestsOptOut>true</DotNetBuildTestsOptOut>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(DotNetBuildSourceOnly)' == 'true'">

src/SourceBuild/content/repo-projects/efcore.proj

@@ -1,5 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+  <PropertyGroup>
+    <!-- Tests are failing to build: https://github.com/dotnet/efcore/issues/35547 -->
+    <DotNetBuildTestsOptOut>true</DotNetBuildTestsOptOut>
+  </PropertyGroup>
+
   <ItemGroup>
     <RepositoryReference Include="arcade" />
     <RepositoryReference Include="runtime" />

src/SourceBuild/content/repo-projects/roslyn.proj

@@ -3,6 +3,9 @@
   <PropertyGroup>
     <LogVerbosityOptOut>true</LogVerbosityOptOut>
 
+    <!-- Tests are failing to build: https://github.com/dotnet/roslyn/issues/76960 -->
+    <DotNetBuildTestsOptOut>true</DotNetBuildTestsOptOut>
+
     <!-- Roslyn's build.cmd adds -build automatically. On non-windows, use the default -->
     <BuildActions Condition="'$(BuildOS)' == 'windows'">$(FlagParameterPrefix)restore</BuildActions>
     <BuildActions Condition="'$(BuildOS)' == 'windows'">$(BuildActions) $(FlagParameterPrefix)pack</BuildActions>

src/SourceBuild/content/repo-projects/vstest.proj

@@ -2,6 +2,9 @@
 
   <PropertyGroup>
     <DeterministicBuildOptOut>true</DeterministicBuildOptOut>
+
+    <!-- Tests are failing to build: https://github.com/microsoft/vstest/issues/14994 -->
+    <DotNetBuildTestsOptOut>true</DotNetBuildTestsOptOut>
   </PropertyGroup>
 
   <ItemGroup>

test/Microsoft.DotNet.MSBuildSdkResolver.Tests/Microsoft.DotNet.MSBuildSdkResolver.Tests.csproj

@@ -8,6 +8,10 @@
 
   <PropertyGroup>
     <TargetFramework>net472</TargetFramework>
+    <!-- For product build, the .NET Framework TFM only builds in the second build pass as it depends on assets from other
+         verticals that are built in the first build pass.
+         Disabling this project as references are not building in this case. -->
+    <ExcludeFromBuild Condition="'$(DotNetBuild)' == 'true' and '$(DotNetBuildPass)' != '2'">true</ExcludeFromBuild>
     <StrongNameKeyId>MicrosoftAspNetCore</StrongNameKeyId>
 
     <!-- By default test projects don't append TargetFramework to output path, but for multi-targeted tests

test/Microsoft.DotNet.TemplateLocator.Tests/Microsoft.DotNet.TemplateLocator.Tests.csproj

@@ -2,6 +2,9 @@
   <PropertyGroup>
     <TargetFrameworks>net472;$(ToolsetTargetFramework)</TargetFrameworks>
     <TargetFrameworks Condition=" '$([MSBuild]::IsOSPlatform(`Windows`))' == 'false' ">$(ToolsetTargetFramework)</TargetFrameworks>
+    <!-- For product build, the .NET Framework TFM only builds in the second build pass as it depends on assets from other
+         verticals that are built in the first build pass. -->
+    <TargetFrameworks Condition="'$(DotNetBuild)' == 'true' and '$(DotNetBuildPass)' != '2'">$(ToolsetTargetFramework)</TargetFrameworks>
     <OutputType Condition="'$(TargetFramework)' == '$(ToolsetTargetFramework)'">Exe</OutputType>
     <StrongNameKeyId>MicrosoftAspNetCore</StrongNameKeyId>