Enable trimming checks for Mvc.Core and consumers

Author: captainsafia

src/Mvc/Mvc.ApiExplorer/src/DefaultApiDescriptionProvider.cs

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using Microsoft.AspNetCore.Http.Metadata;
 using Microsoft.AspNetCore.Mvc.Abstractions;
@@ -20,6 +21,7 @@ namespace Microsoft.AspNetCore.Mvc.ApiExplorer;
 /// Implements a provider of <see cref="ApiDescription"/> for actions represented
 /// by <see cref="ControllerActionDescriptor"/>.
 /// </summary>
+[RequiresUnreferencedCode("DefaultApiDescriptionProvider is used by MVC which does not currently support trimming or native AOT.", Url = "https://aka.ms/aspnet/trimming")]
 public class DefaultApiDescriptionProvider : IApiDescriptionProvider
 {
     private readonly MvcOptions _mvcOptions;
@@ -268,7 +270,7 @@ parameter.ModelMetadata is DefaultModelMetadata defaultModelMetadata &&
                         !defaultModelMetadata.Attributes.Attributes.OfType<IFromRouteMetadata>().Any())
                     {
                         // If we didn't see the parameter in the route and no FromRoute metadata is set, it probably means
-                        // the parameter binding source was inferred (InferParameterBindingInfoConvention)  
+                        // the parameter binding source was inferred (InferParameterBindingInfoConvention)
                         // probably because another route to this action contains it as route parameter and
                         // will be removed from the API description
                         // https://github.com/dotnet/aspnetcore/issues/26234

src/Mvc/Mvc.ApiExplorer/src/DependencyInjection/MvcApiExplorerMvcCoreBuilderExtensions.cs

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics.CodeAnalysis;
 using Microsoft.AspNetCore.Mvc.ApiExplorer;
 using Microsoft.Extensions.DependencyInjection.Extensions;
 
@@ -16,6 +17,7 @@ public static class MvcApiExplorerMvcCoreBuilderExtensions
     /// </summary>
     /// <param name="builder">The <see cref="IMvcCoreBuilder"/>.</param>
     /// <returns>The <see cref="IMvcCoreBuilder"/>.</returns>
+    [RequiresUnreferencedCode("MVC does not currently support trimming or native AOT.", Url = "https://aka.ms/aspnet/trimming")]
     public static IMvcCoreBuilder AddApiExplorer(this IMvcCoreBuilder builder)
     {
         ArgumentNullException.ThrowIfNull(builder);
@@ -25,6 +27,7 @@ public static IMvcCoreBuilder AddApiExplorer(this IMvcCoreBuilder builder)
     }
 
     // Internal for testing.
+    [RequiresUnreferencedCode("MVC does not currently support trimming or native AOT.", Url = "https://aka.ms/aspnet/trimming")]
     internal static void AddApiExplorerServices(IServiceCollection services)
     {
         services.TryAddSingleton<IApiDescriptionGroupCollectionProvider, ApiDescriptionGroupCollectionProvider>();

src/Mvc/Mvc.ApiExplorer/src/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj

@@ -7,7 +7,7 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc</PackageTags>
     <IsPackable>false</IsPackable>
-    <IsAotCompatible>true</IsAotCompatible>
+    <IsTrimmable>true</IsTrimmable>
   </PropertyGroup>
 
   <ItemGroup>