Make ApiExplorer for minimal APIs trim-compatible

AspNetCore.sln

@@ -1674,8 +1674,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ResultsOfTGenerator", "src\
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "OpenApi", "OpenApi", "{2299CCD8-8F9C-4F2B-A633-9BF4DA81022B}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.OpenApi.Tests", "src\OpenApi\test\Microsoft.AspNetCore.OpenApi.Tests.csproj", "{3AEFB466-6310-4F3F-923F-9154224E3629}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.OpenApi", "src\OpenApi\src\Microsoft.AspNetCore.OpenApi.csproj", "{EFC8EA45-572D-4D8D-A597-9045A2D8EC40}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.RateLimiting", "src\Middleware\RateLimiting\src\Microsoft.AspNetCore.RateLimiting.csproj", "{8EE73488-2B92-42BD-96C9-0DD65405C828}"
@@ -1818,6 +1816,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GetDocumentSample", "src\To
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BlazorUnitedApp.Client", "src\Components\Samples\BlazorUnitedApp.Client\BlazorUnitedApp.Client.csproj", "{757CBDE0-5D0A-4FD8-99F3-6C20BDDD4E63}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "test", "test", "{B32FF7A7-9CB3-4DCD-AE97-3B2594DB9DAC}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft.AspNetCore.OpenApi.Tests", "src\OpenApi\test\Microsoft.AspNetCore.OpenApi.Tests\Microsoft.AspNetCore.OpenApi.Tests.csproj", "{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -10147,22 +10149,6 @@ Global
 		{9716D0D0-2251-44DD-8596-67D253EEF41C}.Release|x64.Build.0 = Release|Any CPU
 		{9716D0D0-2251-44DD-8596-67D253EEF41C}.Release|x86.ActiveCfg = Release|Any CPU
 		{9716D0D0-2251-44DD-8596-67D253EEF41C}.Release|x86.Build.0 = Release|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Debug|arm64.ActiveCfg = Debug|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Debug|arm64.Build.0 = Debug|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Debug|x64.ActiveCfg = Debug|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Debug|x64.Build.0 = Debug|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Debug|x86.Build.0 = Debug|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Release|Any CPU.Build.0 = Release|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Release|arm64.ActiveCfg = Release|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Release|arm64.Build.0 = Release|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Release|x64.ActiveCfg = Release|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Release|x64.Build.0 = Release|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Release|x86.ActiveCfg = Release|Any CPU
-		{3AEFB466-6310-4F3F-923F-9154224E3629}.Release|x86.Build.0 = Release|Any CPU
 		{EFC8EA45-572D-4D8D-A597-9045A2D8EC40}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{EFC8EA45-572D-4D8D-A597-9045A2D8EC40}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EFC8EA45-572D-4D8D-A597-9045A2D8EC40}.Debug|arm64.ActiveCfg = Debug|Any CPU
@@ -10995,6 +10981,22 @@ Global
 		{757CBDE0-5D0A-4FD8-99F3-6C20BDDD4E63}.Release|x64.Build.0 = Release|Any CPU
 		{757CBDE0-5D0A-4FD8-99F3-6C20BDDD4E63}.Release|x86.ActiveCfg = Release|Any CPU
 		{757CBDE0-5D0A-4FD8-99F3-6C20BDDD4E63}.Release|x86.Build.0 = Release|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Debug|arm64.ActiveCfg = Debug|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Debug|arm64.Build.0 = Debug|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Debug|x64.Build.0 = Debug|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Debug|x86.Build.0 = Debug|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Release|arm64.ActiveCfg = Release|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Release|arm64.Build.0 = Release|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Release|x64.ActiveCfg = Release|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Release|x64.Build.0 = Release|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Release|x86.ActiveCfg = Release|Any CPU
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -11824,7 +11826,6 @@ Global
 		{046F43BC-BEE4-48B7-8C09-ED0A1054A2D7} = {AA5ABFBC-177C-421E-B743-005E0FD1248B}
 		{9716D0D0-2251-44DD-8596-67D253EEF41C} = {323C3EB6-1D15-4B3D-918D-699D7F64DED9}
 		{2299CCD8-8F9C-4F2B-A633-9BF4DA81022B} = {017429CC-C5FB-48B4-9C46-034E29EE2F06}
-		{3AEFB466-6310-4F3F-923F-9154224E3629} = {2299CCD8-8F9C-4F2B-A633-9BF4DA81022B}
 		{EFC8EA45-572D-4D8D-A597-9045A2D8EC40} = {2299CCD8-8F9C-4F2B-A633-9BF4DA81022B}
 		{8EE73488-2B92-42BD-96C9-0DD65405C828} = {1D865E78-7A66-4CA9-92EE-2B350E45281F}
 		{41FF4F96-98D2-4482-A2A7-4B179E80D285} = {1D865E78-7A66-4CA9-92EE-2B350E45281F}
@@ -11893,6 +11894,8 @@ Global
 		{6A19D94D-2BC6-4198-BE2E-342688FDBA4B} = {A1B75FC7-A777-4412-A635-D0C9ED8FE7A0}
 		{D8F7091E-A2D1-4E81-BA7C-97EAE392D683} = {A1B75FC7-A777-4412-A635-D0C9ED8FE7A0}
 		{757CBDE0-5D0A-4FD8-99F3-6C20BDDD4E63} = {5FE1FBC1-8CE3-4355-9866-44FE1307C5F1}
+		{B32FF7A7-9CB3-4DCD-AE97-3B2594DB9DAC} = {2299CCD8-8F9C-4F2B-A633-9BF4DA81022B}
+		{B9BBC1A8-7F58-4F43-94C3-5F3CB125CEF7} = {B32FF7A7-9CB3-4DCD-AE97-3B2594DB9DAC}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {3E8720B3-DBDD-498C-B383-2CC32A054E8F}

eng/RequiresDelayedBuildProjects.props

@@ -20,6 +20,7 @@
     <RequiresDelayedBuild Include="$(RepoRoot)src\Grpc\JsonTranscoding\test\Microsoft.AspNetCore.Grpc.Swagger.Tests\Microsoft.AspNetCore.Grpc.Swagger.Tests.csproj" />
     <RequiresDelayedBuild Include="$(RepoRoot)src\Grpc\JsonTranscoding\test\testassets\IntegrationTestsWebsite\IntegrationTestsWebsite.csproj" />
     <RequiresDelayedBuild Include="$(RepoRoot)src\Grpc\JsonTranscoding\test\testassets\Sandbox\Sandbox.csproj" />
+    <RequiresDelayedBuild Include="$(RepoRoot)src\OpenApi\test\Microsoft.AspNetCore.OpenApi.NativeAotTests\Microsoft.AspNetCore.OpenApi.NativeAotTests.proj" />
     <RequiresDelayedBuild Include="$(RepoRoot)src\ProjectTemplates\test\Templates.Blazor.Tests\Templates.Blazor.Tests.csproj" />
     <RequiresDelayedBuild Include="$(RepoRoot)src\SignalR\server\SignalR\test\Microsoft.AspNetCore.SignalR.TrimmingTests\Microsoft.AspNetCore.SignalR.TrimmingTests.proj" />
     <RequiresDelayedBuild Include="$(RepoRoot)eng\Npm.Workspace.FunctionalTests.nodeproj" />

eng/TrimmableProjects.props

@@ -85,6 +85,9 @@
     <TrimmableProject Include="Microsoft.AspNetCore.SpaServices.Extensions" />
     <TrimmableProject Include="Microsoft.AspNetCore.StaticFiles" />
     <TrimmableProject Include="Microsoft.AspNetCore.WebSockets" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Mvc.Abstractions" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Mvc.ApiExplorer" />
+    <TrimmableProject Include="Microsoft.AspNetCore.Mvc.Core" />
     <TrimmableProject Include="Microsoft.AspNetCore.SignalR.Client.Core" />
     <TrimmableProject Include="Microsoft.AspNetCore.SignalR.Client" />
     <TrimmableProject Include="Microsoft.AspNetCore.Http.Connections.Client" />

eng/testing/linker/SupportFiles/Directory.Build.targets

@@ -75,6 +75,8 @@
     <ProjectReference Include="$(RepoRoot)src\DataProtection\Extensions\src\Microsoft.AspNetCore.DataProtection.Extensions.csproj" />
     <ProjectReference Include="$(RepoRoot)src\SignalR\clients\csharp\Client\src\Microsoft.AspNetCore.SignalR.Client.csproj" />
     <ProjectReference Include="$(RepoRoot)src\SignalR\server\SignalR\src\Microsoft.AspNetCore.SignalR.csproj" />
+    <ProjectReference Include="$(RepoRoot)src\OpenApi\src\Microsoft.AspNetCore.OpenApi.csproj" />
+    <ProjectReference Include="$(RepoRoot)src\Http\Http.Extensions\gen\Microsoft.AspNetCore.Http.RequestDelegateGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
   </ItemGroup>
 
 </Project>

eng/testing/linker/project.csproj.template

@@ -11,6 +11,11 @@
     <!-- Workaround while there is no SDK available that understands the TFM; suppress unsupported version errors. -->
     <NETCoreAppMaximumVersion>99.9</NETCoreAppMaximumVersion>
     <_ExtraTrimmerArgs>{ExtraTrimmerArgs} $(_ExtraTrimmerArgs)</_ExtraTrimmerArgs>
+    <InterceptorsPreviewNamespaces>$(InterceptorsPreviewNamespaces);Microsoft.AspNetCore.Http.Generated</InterceptorsPreviewNamespaces>
+    <!-- Ensure individual warnings are shown when publishing -->
+    <TrimmerSingleWarn>false</TrimmerSingleWarn>
+    <!-- But ignore the single warn files marked below to suppress their known warnings. -->
+    <NoWarn>$(NoWarn);IL2104</NoWarn>
     {AdditionalProperties}
   </PropertyGroup>
 
@@ -21,5 +26,20 @@
   <ItemGroup>
     {AdditionalProjectReferences}
   </ItemGroup>
-
+
+  <!-- Single warn the following assemblies, which have known warnings, so the warnings can be suppressed for now.
+    Remove this (and the above NoWarn IL2104) once  https://github.com/microsoft/OpenAPI.NET/pull/1717 is merged. -->
+  <Target Name="ConfigureTrimming"
+          BeforeTargets="PrepareForILLink">
+    <ItemGroup>
+      <IlcArg Include="--singlewarnassembly:Microsoft.OpenApi" />
+    </ItemGroup>
+    <ItemGroup>
+      <ManagedAssemblyToLink Condition="'%(Filename)' == 'Microsoft.OpenApi'">
+        <IsTrimmable>true</IsTrimmable>
+        <TrimmerSingleWarn>true</TrimmerSingleWarn>
+      </ManagedAssemblyToLink>
+    </ItemGroup>
+  </Target>
+
 </Project>

src/Http/Http.Abstractions/src/Metadata/IParameterBindingMetadata.cs

@@ -0,0 +1,43 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Reflection;
+
+namespace Microsoft.AspNetCore.Http.Metadata;
+
+/// <summary>
+/// Exposes metadata about the parameter binding details associated with a parameter
+/// in the endpoints handler.
+/// </summary>
+/// <remarks>
+/// This metadata is injected by the RequestDelegateFactory and RequestDelegateGenerator components
+/// and is primarily intended for consumption by the EndpointMetadataApiDescriptionProvider in
+/// ApiExplorer.
+/// </remarks>
+public interface IParameterBindingMetadata
+{
+    /// <summary>
+    /// The name of the parameter.
+    /// </summary>
+	string Name { get; }
+
+    /// <summary>
+    /// <see langword="true "/> is the parameter is associated with a type that implements <see cref="IParsable{TSelf}" /> or exposes a <c>TryParse</c> method.
+    /// </summary>
+	bool HasTryParse { get; }
+
+    /// <summary>
+    /// <see langword="true"/> if the parameter is associated with a type that implements a <c>BindAsync</c> method.
+    /// </summary>
+	bool HasBindAsync { get; }
+
+    /// <summary>
+    /// The <see cref="ParameterInfo"/> associated with the parameter.
+    /// </summary>
+    ParameterInfo ParameterInfo { get; }
+
+    /// <summary>
+    /// <see langword="true"/> if the parameter is optional.
+    /// </summary>
+    bool IsOptional { get; }
+}

src/Http/Http.Abstractions/src/PublicAPI.Unshipped.txt

@@ -5,3 +5,9 @@ Microsoft.AspNetCore.Http.HostString.HostString(string? value) -> void
 Microsoft.AspNetCore.Http.HostString.Value.get -> string?
 Microsoft.AspNetCore.Http.HttpValidationProblemDetails.HttpValidationProblemDetails(System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string!, string![]!>>! errors) -> void
 Microsoft.AspNetCore.Http.Metadata.IDisableHttpMetricsMetadata
+Microsoft.AspNetCore.Http.Metadata.IParameterBindingMetadata
+Microsoft.AspNetCore.Http.Metadata.IParameterBindingMetadata.HasBindAsync.get -> bool
+Microsoft.AspNetCore.Http.Metadata.IParameterBindingMetadata.HasTryParse.get -> bool
+Microsoft.AspNetCore.Http.Metadata.IParameterBindingMetadata.IsOptional.get -> bool
+Microsoft.AspNetCore.Http.Metadata.IParameterBindingMetadata.Name.get -> string!
+Microsoft.AspNetCore.Http.Metadata.IParameterBindingMetadata.ParameterInfo.get -> System.Reflection.ParameterInfo!

src/Http/Http.Extensions/gen/RequestDelegateGenerator.cs

@@ -5,14 +5,12 @@
 using System.Globalization;
 using System.IO;
 using System.Linq;
-using System.Text;
 using Microsoft.AspNetCore.Analyzers.Infrastructure;
 using Microsoft.AspNetCore.App.Analyzers.Infrastructure;
 using Microsoft.AspNetCore.Http.RequestDelegateGenerator.StaticRouteHandlerModel;
 using Microsoft.AspNetCore.Http.RequestDelegateGenerator.StaticRouteHandlerModel.Emitters;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
-using Microsoft.CodeAnalysis.Operations;
 
 namespace Microsoft.AspNetCore.Http.RequestDelegateGenerator;
 
@@ -243,6 +241,7 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
                 var hasJsonBody = endpoints.Any(endpoint => endpoint.EmitterContext.HasJsonBody || endpoint.EmitterContext.HasJsonBodyOrService || endpoint.EmitterContext.HasJsonBodyOrQuery);
                 var hasResponseMetadata = endpoints.Any(endpoint => endpoint.EmitterContext.HasResponseMetadata);
                 var requiresPropertyAsParameterInfo = endpoints.Any(endpoint => endpoint.EmitterContext.RequiresPropertyAsParameterInfo);
+                var requiresParameterBindingMetadataClass = endpoints.Any(endpoint => endpoint.EmitterContext.RequiresParameterBindingMetadataClass);
 
                 using var stringWriter = new StringWriter(CultureInfo.InvariantCulture);
                 using var codeWriter = new CodeWriter(stringWriter, baseIndent: 0);
@@ -262,6 +261,11 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
                     codeWriter.WriteLine(RequestDelegateGeneratorSources.PropertyAsParameterInfoClass);
                 }
 
+                if (requiresParameterBindingMetadataClass)
+                {
+                    codeWriter.WriteLine(RequestDelegateGeneratorSources.ParameterBindingMetadataClass);
+                }
+
                 return stringWriter.ToString();
             });
 

src/Http/Http.Extensions/gen/RequestDelegateGeneratorSources.cs

@@ -449,6 +449,36 @@ public override bool IsDefined(Type attributeType, bool inherit)
     }
 """;
 
+    public static string ParameterBindingMetadataClass = $$"""
+    {{GeneratedCodeAttribute}}
+    file sealed class ParameterBindingMetadata: IParameterBindingMetadata
+    {
+        internal ParameterBindingMetadata(
+            string name,
+            ParameterInfo parameterInfo,
+            bool hasTryParse = false,
+            bool hasBindAsync = false,
+            bool isOptional = false)
+        {
+            Name = name;
+            ParameterInfo = parameterInfo;
+            HasTryParse = hasTryParse;
+            HasBindAsync = hasBindAsync;
+            IsOptional = isOptional;
+        }
+
+        public string Name { get; }
+
+        public bool HasTryParse { get; }
+
+        public bool HasBindAsync { get; }
+
+        public ParameterInfo ParameterInfo { get; }
+
+        public bool IsOptional { get; }
+    }
+""";
+
     public static string AntiforgeryMetadataType = """
 file sealed class AntiforgeryMetadata : IAntiforgeryMetadata
 {

src/Http/Http.Extensions/gen/StaticRouteHandlerModel/Emitters/EmitterContext.cs

@@ -12,6 +12,7 @@ internal sealed class EmitterContext
     public bool HasBindAsync { get; set; }
     public bool HasParsable { get; set; }
     public bool RequiresPropertyAsParameterInfo { get; set; }
+    public bool RequiresParameterBindingMetadataClass { get; set; }
     public bool RequiresLoggingHelper { get; set; }
     public bool HasEndpointMetadataProvider { get; set; }
     public bool HasEndpointParameterMetadataProvider { get; set; }

src/Http/Http.Extensions/gen/StaticRouteHandlerModel/EndpointParameter.cs

@@ -47,7 +47,7 @@ private EndpointParameter(Endpoint endpoint, IPropertySymbol property, IParamete
         PropertyAsParameterInfoConstruction = parameter is not null
             ? $"new PropertyAsParameterInfo({(IsOptional ? "true" : "false")}, {propertyInfo}, {parameter.GetParameterInfoFromConstructorCode()})"
             : $"new PropertyAsParameterInfo({(IsOptional ? "true" : "false")}, {propertyInfo})";
-        endpoint.EmitterContext.RequiresPropertyAsParameterInfo = IsProperty && IsEndpointParameterMetadataProvider;
+        endpoint.EmitterContext.RequiresPropertyAsParameterInfo = IsProperty;
         ProcessEndpointParameterSource(endpoint, property, attributeBuilder.ToImmutable(), wellKnownTypes);
     }