Add AOT publisj test job

Author: Nigusu-Allehu

eng/pipelines/pr.yml

@@ -284,3 +284,20 @@ stages:
           displayName: Log Environment Variables
         - script: dotnet format whitespace --verify-no-changes NuGet.sln
           displayName: Run dotnet format whitespace
+
+- stage:
+  displayName: AOT Compatibility
+  dependsOn: []
+  jobs:
+  - job:
+    displayName: AOT Publish Smoke Test (win-x64)
+    timeoutInMinutes: 20
+    pool:
+      vmImage: windows-latest
+    steps:
+    - task: PowerShell@2
+      displayName: Run configure.ps1
+      inputs:
+        filePath: configure.ps1
+    - script: dotnet publish test/NuGet.AotCompatibility.Test/NuGet.AotCompatibility.Test.csproj -r win-x64 -c Release
+      displayName: AOT publish NuGet libraries

test/NuGet.AotCompatibility.Test/NuGet.AotCompatibility.Test.csproj

@@ -0,0 +1,44 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>$(LatestNETCoreTargetFramework)</TargetFramework>
+    <PublishAot>true</PublishAot>
+    <IlcTreatWarningsAsErrors>true</IlcTreatWarningsAsErrors>
+    <PackProject>false</PackProject>
+    <UsePublicApiAnalyzer>false</UsePublicApiAnalyzer>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.Commands\NuGet.Commands.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.Common\NuGet.Common.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.Configuration\NuGet.Configuration.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.Credentials\NuGet.Credentials.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.DependencyResolver.Core\NuGet.DependencyResolver.Core.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.Frameworks\NuGet.Frameworks.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.LibraryModel\NuGet.LibraryModel.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.Packaging\NuGet.Packaging.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.ProjectModel\NuGet.ProjectModel.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.Protocol\NuGet.Protocol.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.Resolver\NuGet.Resolver.csproj" />
+    <ProjectReference Include="..\..\src\NuGet.Core\NuGet.Versioning\NuGet.Versioning.csproj" />
+  </ItemGroup>
+
+  <!--
+    Root all public types in each NuGet assembly so the ILC compiler analyzes
+    the full public surface of every library, not just what Program.cs reaches.
+  -->
+  <ItemGroup>
+    <TrimmerRootAssembly Include="NuGet.Commands" />
+    <TrimmerRootAssembly Include="NuGet.Common" />
+    <TrimmerRootAssembly Include="NuGet.Configuration" />
+    <TrimmerRootAssembly Include="NuGet.Credentials" />
+    <TrimmerRootAssembly Include="NuGet.DependencyResolver.Core" />
+    <TrimmerRootAssembly Include="NuGet.Frameworks" />
+    <TrimmerRootAssembly Include="NuGet.LibraryModel" />
+    <TrimmerRootAssembly Include="NuGet.Packaging" />
+    <TrimmerRootAssembly Include="NuGet.ProjectModel" />
+    <TrimmerRootAssembly Include="NuGet.Protocol" />
+    <TrimmerRootAssembly Include="NuGet.Resolver" />
+    <TrimmerRootAssembly Include="NuGet.Versioning" />
+  </ItemGroup>
+</Project>

test/NuGet.AotCompatibility.Test/Program.cs

@@ -0,0 +1,8 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+// AOT compatibility smoke test entry point.
+// All NuGet assemblies with IsAotCompatible=true are referenced via ProjectReference
+// and rooted via TrimmerRootAssembly so the ILC compiler analyzes their full public
+// surface. A successful publish with IlcTreatWarningsAsErrors=true confirms AOT
+// compatibility. No application logic is needed here.