Add Copilot EA for language server

Roslyn.sln

@@ -569,6 +569,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ExternalAccess", "ExternalA
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.LanguageServer.Protocol.Test.Utilities", "src\LanguageServer\Protocol.TestUtilities\Microsoft.CodeAnalysis.LanguageServer.Protocol.Test.Utilities.csproj", "{7465CE63-A7B7-475F-8C57-48D2F8BC665A}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot", "src\LanguageServer\ExternalAccess\Copilot\Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.csproj", "{900168D7-D982-86CE-5097-C5F173BA4D8B}"
+EndProject
 Project("{D954291E-2A0B-460D-934E-DC6B0785DB48}") = "Microsoft.CodeAnalysis.Threading", "src\Dependencies\Threading\Microsoft.CodeAnalysis.Threading.shproj", "{967723E8-4FDD-447B-99F6-4F8C47CB5433}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.Threading.Package", "src\Dependencies\Threading\Microsoft.CodeAnalysis.Threading.Package.csproj", "{2559DAF9-784E-4C29-E0E1-70204B1FD56E}"
@@ -1403,6 +1405,10 @@ Global
 		{7465CE63-A7B7-475F-8C57-48D2F8BC665A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{7465CE63-A7B7-475F-8C57-48D2F8BC665A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{7465CE63-A7B7-475F-8C57-48D2F8BC665A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{900168D7-D982-86CE-5097-C5F173BA4D8B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{900168D7-D982-86CE-5097-C5F173BA4D8B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{900168D7-D982-86CE-5097-C5F173BA4D8B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{900168D7-D982-86CE-5097-C5F173BA4D8B}.Release|Any CPU.Build.0 = Release|Any CPU
 		{5D60CF30-28A9-9F0F-7610-D90E4A69AE73}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{5D60CF30-28A9-9F0F-7610-D90E4A69AE73}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{5D60CF30-28A9-9F0F-7610-D90E4A69AE73}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -1676,6 +1682,7 @@ Global
 		{1AE9182D-B03E-4B00-B32E-37AE01715F57} = {EE97CB90-33BB-4F3A-9B3D-69375DEC6AC6}
 		{806F0C6F-3640-4C92-8D55-6767B1535467} = {D449D505-CC6A-4E0B-AF1B-976E2D0AE67A}
 		{7465CE63-A7B7-475F-8C57-48D2F8BC665A} = {D449D505-CC6A-4E0B-AF1B-976E2D0AE67A}
+		{900168D7-D982-86CE-5097-C5F173BA4D8B} = {806F0C6F-3640-4C92-8D55-6767B1535467}
 		{5D60CF30-28A9-9F0F-7610-D90E4A69AE73} = {58A2876A-618D-4AE6-A136-E44B42BBDE11}
 		{967723E8-4FDD-447B-99F6-4F8C47CB5433} = {C2D1346B-9665-4150-B644-075CF1636BAA}
 		{2559DAF9-784E-4C29-E0E1-70204B1FD56E} = {C2D1346B-9665-4150-B644-075CF1636BAA}

eng/config/PublishData.json

@@ -85,6 +85,7 @@
       "Microsoft.CodeAnalysis.ExternalAccess.Xamarin.Remote": "vs-impl",
       "Microsoft.CodeAnalysis.ExternalAccess.Xaml":  "vs-impl",
       "Microsoft.CodeAnalysis.ExternalAccess.DotNetWatch": "vs-impl",
+      "Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot": "vs-impl",
       "Microsoft.CodeAnalysis.Remote.Razor.ServiceHub": "vs-impl",
       "Microsoft.CodeAnalysis.Remote.ServiceHub": "vs-impl",
       "Microsoft.CodeAnalysis.Remote.Workspaces": "vs-impl",

src/Features/ExternalAccess/Copilot/Microsoft.CodeAnalysis.ExternalAccess.Copilot.csproj

@@ -22,6 +22,7 @@
     -->
     <InternalsVisibleTo Include="Microsoft.VisualStudio.Copilot.CodeMappers.CSharp" Key="$(CopilotKey)" />
     <InternalsVisibleTo Include="Microsoft.VisualStudio.Copilot.Roslyn" Key="$(CopilotKey)" />
+    <InternalsVisibleTo Include="Microsoft.VisualStudio.Copilot.Roslyn.LanguageServer" Key="$(CopilotKey)" />
   </ItemGroup>
 
   <ItemGroup>

src/LanguageServer/ExternalAccess/Copilot/Handler/AbstractCopilotLspServiceDocumentRequestHandler.cs

@@ -0,0 +1,28 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.CodeAnalysis.LanguageServer.Handler;
+using Microsoft.CommonLanguageServerProtocol.Framework;
+using Roslyn.LanguageServer.Protocol;
+
+namespace Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot;
+
+/// <inheritdoc cref="ILspServiceDocumentRequestHandler{TRequest, TResponse}"/>
+internal abstract class AbstractCopilotLspServiceDocumentRequestHandler<TRequest, TResponse> : ILspServiceDocumentRequestHandler<TRequest, TResponse>
+{
+    public abstract Task<TResponse> HandleRequestAsync(TRequest request, CopilotRequestContext context, CancellationToken cancellationToken);
+    public abstract Uri GetTextDocumentUri(TRequest request);
+
+    bool IMethodHandler.MutatesSolutionState => false;
+    bool ISolutionRequiredHandler.RequiresLSPSolution => true;
+
+    TextDocumentIdentifier ITextDocumentIdentifierHandler<TRequest, TextDocumentIdentifier>.GetTextDocumentIdentifier(TRequest request)
+        => new() { Uri = GetTextDocumentUri(request) };
+
+    Task<TResponse> IRequestHandler<TRequest, TResponse, RequestContext>.HandleRequestAsync(TRequest request, RequestContext context, CancellationToken cancellationToken)
+        => HandleRequestAsync(request, new CopilotRequestContext(context), cancellationToken);
+}

src/LanguageServer/ExternalAccess/Copilot/Handler/CopilotRequestContext.cs

@@ -0,0 +1,24 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using Microsoft.CodeAnalysis.LanguageServer.Handler;
+
+namespace Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot;
+
+/// <summary>
+/// Context for requests handled by <see cref="AbstractCopilotLspServiceDocumentRequestHandler{TRequest, TResponse}"/>
+/// </summary>
+internal readonly struct CopilotRequestContext(RequestContext context)
+{
+    /// <summary>
+    /// The solution state that the request should operate on.
+    /// </summary>
+    public Solution Solution => context.Solution ?? throw new InvalidOperationException();
+
+    /// <inheritdoc cref="RequestContext.Document"/>
+    public Document? Document => context.Document;
+
+    public T GetRequiredService<T>() where T : class => context.GetRequiredService<T>();
+}

src/LanguageServer/ExternalAccess/Copilot/InternalAPI.Shipped.txt

@@ -0,0 +1 @@
+#nullable enable

src/LanguageServer/ExternalAccess/Copilot/InternalAPI.Unshipped.txt

@@ -0,0 +1,20 @@
+#nullable enable
+abstract Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.AbstractCopilotLspServiceDocumentRequestHandler<TRequest, TResponse>.GetTextDocumentUri(TRequest request) -> System.Uri!
+abstract Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.AbstractCopilotLspServiceDocumentRequestHandler<TRequest, TResponse>.HandleRequestAsync(TRequest request, Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotRequestContext context, System.Threading.CancellationToken cancellationToken) -> System.Threading.Tasks.Task<TResponse>!
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.AbstractCopilotLspServiceDocumentRequestHandler<TRequest, TResponse>
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.AbstractCopilotLspServiceDocumentRequestHandler<TRequest, TResponse>.AbstractCopilotLspServiceDocumentRequestHandler() -> void
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotLspServices
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotLspServices.CopilotLspServices() -> void
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotLspServices.CopilotLspServices(Microsoft.CodeAnalysis.LanguageServer.LspServices! lspServices) -> void
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotLspServices.GetService<T>() -> T?
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotMethodAttribute
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotMethodAttribute.CopilotMethodAttribute(string! method) -> void
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotRequestContext
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotRequestContext.CopilotRequestContext() -> void
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotRequestContext.CopilotRequestContext(Microsoft.CodeAnalysis.LanguageServer.Handler.RequestContext context) -> void
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotRequestContext.Document.get -> Microsoft.CodeAnalysis.Document?
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotRequestContext.GetRequiredService<T>() -> T!
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.CopilotRequestContext.Solution.get -> Microsoft.CodeAnalysis.Solution!
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.ExportCopilotStatelessLspServiceAttribute
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.ExportCopilotStatelessLspServiceAttribute.ExportCopilotStatelessLspServiceAttribute(System.Type! type) -> void
+Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.ICopilotLspService

src/LanguageServer/ExternalAccess/Copilot/LspServices/CopilotLspServices.cs

@@ -0,0 +1,11 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot;
+
+internal readonly struct CopilotLspServices(LspServices lspServices)
+{
+    public T? GetService<T>() where T : notnull
+        => lspServices.GetService<T>();
+}

src/LanguageServer/ExternalAccess/Copilot/LspServices/CopilotMethodAttribute.cs

@@ -0,0 +1,13 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CodeAnalysis.LanguageServer.Handler;
+
+namespace Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot;
+
+/// <summary>
+/// An attribute which identifies the method which a Copilot request handler like
+/// <see cref="AbstractCopilotLspServiceDocumentRequestHandler{TRequest, TResponse}"/> implements.
+/// </summary>
+internal sealed class CopilotMethodAttribute(string method) : MethodAttribute(method);

src/LanguageServer/ExternalAccess/Copilot/LspServices/ExportCopilotStatelessLspServiceAttribute.cs

@@ -0,0 +1,12 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using Microsoft.CodeAnalysis.LanguageServer.Handler;
+
+namespace Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot;
+
+/// <inheritdoc cref="ExportStatelessLspServiceAttribute"/>
+internal sealed class ExportCopilotStatelessLspServiceAttribute(Type type) :
+    ExportCSharpVisualBasicStatelessLspServiceAttribute(type, WellKnownLspServerKinds.Any);

src/LanguageServer/ExternalAccess/Copilot/LspServices/ICopilotLspService.cs

@@ -0,0 +1,12 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot;
+
+/// <summary>
+/// Interface to mark a Copilot LSP service.
+/// </summary>
+internal interface ICopilotLspService : ILspService
+{
+}

src/LanguageServer/ExternalAccess/Copilot/Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.csproj

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+    <RootNamespace>Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot</RootNamespace>
+    <TargetFramework>netstandard2.0</TargetFramework>
+
+    <IsPackable>true</IsPackable>
+    <PackageId>Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot</PackageId>
+    <PackageDescription>
+      A supporting package for the GitHub Copilot in Visual Studio Code.
+    </PackageDescription>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <!--
+      ⚠ ONLY COPILOT ASSEMBLIES MAY BE ADDED HERE ⚠
+    -->
+    <InternalsVisibleTo Include="Microsoft.VisualStudio.Copilot.Roslyn.LanguageServer" Key="$(CopilotKey)" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Protocol\Microsoft.CodeAnalysis.LanguageServer.Protocol.csproj" PrivateAssets="all" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PublicAPI Include="PublicAPI.Shipped.txt" />
+    <PublicAPI Include="PublicAPI.Unshipped.txt" />
+    <PublicAPI Include="InternalAPI.Shipped.txt" />
+    <PublicAPI Include="InternalAPI.Unshipped.txt" />
+  </ItemGroup>
+
+</Project>

src/LanguageServer/ExternalAccess/Copilot/PublicAPI.Unshipped.txt

@@ -0,0 +1 @@
+

src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/Microsoft.CodeAnalysis.LanguageServer.csproj

@@ -93,6 +93,7 @@
     <ProjectReference Include="..\ExternalAccess\VisualDiagnostics\Microsoft.CodeAnalysis.ExternalAccess.VisualDiagnostics.csproj" />
     <ProjectReference Include="..\..\Tools\ExternalAccess\Xaml\Microsoft.CodeAnalysis.ExternalAccess.Xaml.csproj" />
     <ProjectReference Include="..\ExternalAccess\CompilerDeveloperSDK\Microsoft.CodeAnalysis.ExternalAccess.CompilerDeveloperSDK.csproj" />
+    <ProjectReference Include="..\ExternalAccess\Copilot\Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot.csproj" />
   </ItemGroup>
 
   <ItemGroup>

src/LanguageServer/Protocol/Microsoft.CodeAnalysis.LanguageServer.Protocol.csproj

@@ -83,6 +83,7 @@
     <InternalsVisibleTo Include="AnalyzerRunner" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExternalAccess.Debugger" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExternalAccess.CompilerDeveloperSDK" />
+    <InternalsVisibleTo Include="Microsoft.CodeAnalysis.LanguageServer.ExternalAccess.Copilot" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExternalAccess.Razor.UnitTests" />
     <InternalsVisibleTo Include="Microsoft.CommonLanguageServerProtocol.Framework.Example" />
     <InternalsVisibleTo Include="Microsoft.CommonLanguageServerProtocol.Framework.UnitTests" />