React to NuGet package pruning warnings

Contributes to dotnet/sdk#46642

NuGet added a new feature that automatically prunes package and project references that are provided by the shared framework that is targeted.

Resolve the few warnings that got emitted in ref projects when source-building the repository.

Author: ViktorHofer

eng/packaging.targets

@@ -1,4 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppPrevious);$(NetCoreAppMinimum);netstandard2.0;$(NetFrameworkMinimum)</TargetFrameworks>
   </PropertyGroup>
@@ -13,7 +14,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="$(LibrariesProjectRoot)System.Diagnostics.DiagnosticSource\ref\System.Diagnostics.DiagnosticSource.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Extensions.DependencyInjection.Abstractions\ref\Microsoft.Extensions.DependencyInjection.Abstractions.csproj" />
   </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' != '$(NetCoreAppCurrent)'">
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Diagnostics.DiagnosticSource\ref\System.Diagnostics.DiagnosticSource.csproj" />
+  </ItemGroup>
+
 </Project>

src/libraries/Microsoft.Extensions.Diagnostics.Abstractions/ref/Microsoft.Extensions.Diagnostics.Abstractions.csproj

@@ -1,4 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppPrevious);$(NetCoreAppMinimum);netstandard2.0;$(NetFrameworkMinimum)</TargetFrameworks>
   </PropertyGroup>
@@ -9,6 +10,10 @@
 
   <ItemGroup>
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Extensions.DependencyInjection.Abstractions\ref\Microsoft.Extensions.DependencyInjection.Abstractions.csproj" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' != '$(NetCoreAppCurrent)'">
     <ProjectReference Include="$(LibrariesProjectRoot)System.Diagnostics.DiagnosticSource\ref\System.Diagnostics.DiagnosticSource.csproj" /> 
   </ItemGroup>
+
 </Project>

src/libraries/Microsoft.Extensions.Logging.Abstractions/ref/Microsoft.Extensions.Logging.Abstractions.csproj

@@ -18,11 +18,14 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\ref\System.Text.Json.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Extensions.Configuration.Abstractions\ref\Microsoft.Extensions.Configuration.Abstractions.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Extensions.Logging.Abstractions\ref\Microsoft.Extensions.Logging.Abstractions.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Extensions.Logging\ref\Microsoft.Extensions.Logging.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Extensions.Options\ref\Microsoft.Extensions.Options.csproj" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\ref\System.Text.Json.csproj" />
+  </ItemGroup>
+
 </Project>

src/libraries/Microsoft.Extensions.Logging.Console/ref/Microsoft.Extensions.Logging.Console.csproj

@@ -1,4 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppPrevious);$(NetCoreAppMinimum);netstandard2.0;$(NetFrameworkMinimum)</TargetFrameworks>
     <CLSCompliant>false</CLSCompliant>
@@ -8,7 +9,7 @@
     <Compile Include="System.Formats.Nrbf.cs" />
   </ItemGroup>
 
-  <ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' != '$(NetCoreAppCurrent)'">
     <ProjectReference Include="$(LibrariesProjectRoot)System.Reflection.Metadata\ref\System.Reflection.Metadata.csproj" />
   </ItemGroup>
 
@@ -21,4 +22,5 @@
     <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\RequiresDynamicCodeAttribute.cs" />
     <PackageReference Include="System.Memory" Version="$(SystemMemoryVersion)" />
   </ItemGroup>
+
 </Project>

src/libraries/System.Formats.Nrbf/ref/System.Formats.Nrbf.csproj

@@ -13,7 +13,7 @@
     <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\RequiresUnreferencedCodeAttribute.cs" />
   </ItemGroup>
 
-  <ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' != '$(NetCoreAppCurrent)'">
     <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\ref\System.Text.Json.csproj" />
   </ItemGroup>
 

src/libraries/System.Memory.Data/ref/System.Memory.Data.csproj

@@ -17,16 +17,16 @@
     <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\StringSyntaxAttribute.cs" />
   </ItemGroup>
 
-  <ItemGroup>
-    <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\ref\System.Text.Json.csproj" />
-  </ItemGroup>
-
   <ItemGroup Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">
     <ProjectReference Include="$(LibrariesProjectRoot)System.Net.Http\ref\System.Net.Http.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)System.Net.Primitives\ref\System.Net.Primitives.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime\ref\System.Runtime.csproj" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFramework)' != '$(NetCoreAppCurrent)'">
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\ref\System.Text.Json.csproj" />
+  </ItemGroup>
+
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">
     <Reference Include="System.Net.Http" />
   </ItemGroup>