Write out the aspnetcore_base_runtime.version file

Author: jkoritzinsky

eng/Build.props

@@ -150,6 +150,7 @@
                           $(RepoRoot)src\Framework\App.Ref.Internal\src\Microsoft.AspNetCore.App.Ref.Internal.csproj;
                           $(RepoRoot)src\Framework\App.Runtime\src\aspnetcore-runtime.proj;
                           $(RepoRoot)src\Framework\App.Runtime\src\aspnetcore-runtime-composite.proj;
+                          $(RepoRoot)src\Framework\App.Runtime\src\aspnetcore-base-runtime.proj;
                           $(RepoRoot)src\Framework\AspNetCoreAnalyzers\test\Microsoft.AspNetCore.App.Analyzers.Test.csproj;
                           $(RepoRoot)src\Framework\test\Microsoft.AspNetCore.App.UnitTests.csproj;
                           $(RepoRoot)src\Caching\**\*.*proj;

global.json

@@ -30,6 +30,7 @@
     "Microsoft.DotNet.Arcade.Sdk": "10.0.0-beta.24531.2",
     "Microsoft.DotNet.Helix.Sdk": "10.0.0-beta.24531.2",
     "Microsoft.DotNet.SharedFramework.Sdk" : "10.0.0-beta.24531.2",
+    "Microsoft.Build.NoTargets": "3.7.0",
     "Microsoft.Build.Traversal": "3.4.0"
   }
 }

src/Framework/App.Runtime/src/aspnetcore-base-runtime.proj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.Build.NoTargets">
+  <PropertyGroup>
+    <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
+    <!-- This file is used by the dotnet/sdk repo to determine if the version of AspNetCore.App is coherent with Microsoft.NETCore.App. -->
+    <BaseRuntimeVersionFileName>aspnetcore_base_runtime.version</BaseRuntimeVersionFileName>
+    <BaseRuntimeVersionFileOutputPath>$(InstallersOutputPath)$(BaseRuntimeVersionFileName)</BaseRuntimeVersionFileOutputPath>
+    <!--
+      This version file is required by source-build.
+    -->
+    <ExcludeFromSourceOnlyBuild>false</ExcludeFromSourceOnlyBuild>
+  </PropertyGroup>
+
+  <Target Name="WriteBaseRuntimeVersionFile" AfterTargets="Build">
+    <WriteLinesToFile File="$(BaseRuntimeVersionFileOutputPath)"
+                      Lines="$(MicrosoftNETCoreAppRuntimeVersion)"
+                      Overwrite="true" />
+  </Target>
+</Project>