Allow the source generator to produce results for miscellaneous files

eng/Version.Details.props

@@ -7,27 +7,27 @@ This file should be imported by eng/Versions.props
 <Project>
   <PropertyGroup>
     <!-- dotnet/roslyn dependencies -->
-    <MicrosoftCodeAnalysisAnalyzersPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisAnalyzersPackageVersion>
-    <MicrosoftCodeAnalysisCommonPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisCommonPackageVersion>
-    <MicrosoftCodeAnalysisCSharpPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisCSharpPackageVersion>
-    <MicrosoftCodeAnalysisCSharpEditorFeaturesPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisCSharpEditorFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisEditorFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesCommonPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisEditorFeaturesCommonPackageVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>
-    <MicrosoftCodeAnalysisExternalAccessFSharpPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisExternalAccessFSharpPackageVersion>
-    <MicrosoftCodeAnalysisExternalAccessRazorEditorFeaturesPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisExternalAccessRazorEditorFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisExternalAccessRazorFeaturesPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisExternalAccessRazorFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisLanguageServerProtocolPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisLanguageServerProtocolPackageVersion>
-    <MicrosoftCodeAnalysisRemoteServiceHubPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisRemoteServiceHubPackageVersion>
-    <MicrosoftCodeAnalysisTestUtilitiesPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisTestUtilitiesPackageVersion>
-    <MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>
-    <MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>
-    <MicrosoftCodeAnalysisWorkspacesMSBuildPackageVersion>5.0.0-2.25406.1</MicrosoftCodeAnalysisWorkspacesMSBuildPackageVersion>
-    <MicrosoftCommonLanguageServerProtocolFrameworkPackageVersion>5.0.0-2.25406.1</MicrosoftCommonLanguageServerProtocolFrameworkPackageVersion>
-    <MicrosoftNetCompilersToolsetPackageVersion>5.0.0-2.25406.1</MicrosoftNetCompilersToolsetPackageVersion>
-    <MicrosoftVisualStudioLanguageServicesPackageVersion>5.0.0-2.25406.1</MicrosoftVisualStudioLanguageServicesPackageVersion>
+    <MicrosoftCodeAnalysisAnalyzersPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisAnalyzersPackageVersion>
+    <MicrosoftCodeAnalysisCommonPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisCommonPackageVersion>
+    <MicrosoftCodeAnalysisCSharpPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisCSharpPackageVersion>
+    <MicrosoftCodeAnalysisCSharpEditorFeaturesPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisCSharpEditorFeaturesPackageVersion>
+    <MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>
+    <MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>
+    <MicrosoftCodeAnalysisEditorFeaturesPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisEditorFeaturesPackageVersion>
+    <MicrosoftCodeAnalysisEditorFeaturesCommonPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisEditorFeaturesCommonPackageVersion>
+    <MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>
+    <MicrosoftCodeAnalysisExternalAccessFSharpPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisExternalAccessFSharpPackageVersion>
+    <MicrosoftCodeAnalysisExternalAccessRazorEditorFeaturesPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisExternalAccessRazorEditorFeaturesPackageVersion>
+    <MicrosoftCodeAnalysisExternalAccessRazorFeaturesPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisExternalAccessRazorFeaturesPackageVersion>
+    <MicrosoftCodeAnalysisLanguageServerProtocolPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisLanguageServerProtocolPackageVersion>
+    <MicrosoftCodeAnalysisRemoteServiceHubPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisRemoteServiceHubPackageVersion>
+    <MicrosoftCodeAnalysisTestUtilitiesPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisTestUtilitiesPackageVersion>
+    <MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>
+    <MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>
+    <MicrosoftCodeAnalysisWorkspacesMSBuildPackageVersion>5.0.0-2.25418.8</MicrosoftCodeAnalysisWorkspacesMSBuildPackageVersion>
+    <MicrosoftCommonLanguageServerProtocolFrameworkPackageVersion>5.0.0-2.25418.8</MicrosoftCommonLanguageServerProtocolFrameworkPackageVersion>
+    <MicrosoftNetCompilersToolsetPackageVersion>5.0.0-2.25418.8</MicrosoftNetCompilersToolsetPackageVersion>
+    <MicrosoftVisualStudioLanguageServicesPackageVersion>5.0.0-2.25418.8</MicrosoftVisualStudioLanguageServicesPackageVersion>
     <!-- dotnet/arcade dependencies -->
     <MicrosoftDotNetArcadeSdkPackageVersion>9.0.0-beta.25255.5</MicrosoftDotNetArcadeSdkPackageVersion>
     <!-- dotnet/aspnetcore dependencies -->

eng/Version.Details.xml

@@ -2,89 +2,89 @@
 <Dependencies>
   <Source Uri="https://github.com/dotnet/dotnet" Mapping="razor" Sha="7f2a07b481a3d24677ebcf6a45e7e27c8ff95a4e" BarId="279809" />
   <ProductDependencies>
-    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CommonLanguageServerProtocol.Framework" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CommonLanguageServerProtocol.Framework" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Common" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.Common" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp.EditorFeatures" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp.EditorFeatures" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp.Features" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp.Features" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Common" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Common" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Text" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Text" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Remote.ServiceHub" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.Remote.ServiceHub" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.VisualBasic.Workspaces" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.VisualBasic.Workspaces" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Workspaces.Common" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.Workspaces.Common" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.VisualStudio.LanguageServices" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.VisualStudio.LanguageServices" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Test.Utilities" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.Test.Utilities" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.ExternalAccess.Razor.Features" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.ExternalAccess.Razor.Features" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.ExternalAccess.Razor.EditorFeatures" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.ExternalAccess.Razor.EditorFeatures" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.LanguageServer.Protocol" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.LanguageServer.Protocol" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.ExternalAccess.FSharp" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.ExternalAccess.FSharp" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Analyzers" Version="5.0.0-2.25406.1">
+    <Dependency Name="Microsoft.CodeAnalysis.Analyzers" Version="5.0.0-2.25418.8">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>5759a992418f0fd3e206cc6f369b6f33e873dfca</Sha>
+      <Sha>8405da69a543a680aab32ede20062e22602d3aef</Sha>
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>

src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/DefaultRazorTagHelperRewritePhase.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.Collections.Immutable;
 using System.Threading;
 using Microsoft.AspNetCore.Razor.Language.Legacy;
 
@@ -14,7 +15,9 @@ protected override void ExecuteCore(RazorCodeDocument codeDocument, Cancellation
             !codeDocument.TryGetTagHelperContext(out var context) ||
             context.TagHelpers is [])
         {
-            // No descriptors, no-op.
+            // No descriptors, so no need to see if any are used. Without setting this though,
+            // we trigger an Assert in the ProcessRemaining method in the source generator.
+            codeDocument.SetReferencedTagHelpers(ImmutableHashSet<TagHelperDescriptor>.Empty);
             return;
         }
 

src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/SourceGenerators/RazorSourceGenerator.RazorProviders.cs

@@ -77,18 +77,28 @@ private static (SourceGeneratorProjectItem?, Diagnostic?) ComputeProjectItems((A
             var (additionalText, globalOptions) = pair;
             var options = globalOptions.GetOptions(additionalText);
 
-            if (!options.TryGetValue("build_metadata.AdditionalFiles.TargetPath", out var encodedRelativePath) ||
-                string.IsNullOrWhiteSpace(encodedRelativePath))
+            string relativePath;
+            if (options.TryGetValue("build_metadata.AdditionalFiles.TargetPath", out var encodedRelativePath))
             {
-                var diagnostic = Diagnostic.Create(
-                    RazorDiagnostics.TargetPathNotProvided,
-                    Location.None,
-                    additionalText.Path);
-                return (null, diagnostic);
+                // TargetPath is optional, but must have a value if provided.
+                if (string.IsNullOrWhiteSpace(encodedRelativePath))
+                {
+                    var diagnostic = Diagnostic.Create(
+                        RazorDiagnostics.TargetPathNotProvided,
+                        Location.None,
+                        additionalText.Path);
+                    return (null, diagnostic);
+                }
+
+                relativePath = Encoding.UTF8.GetString(Convert.FromBase64String(encodedRelativePath));
+            }
+            else
+            {
+                // If the TargetPath is not provided, we effectively assume its in the root of the project.
+                relativePath = Path.GetFileName(additionalText.Path);
             }
 
             options.TryGetValue("build_metadata.AdditionalFiles.CssScope", out var cssScope);
-            var relativePath = Encoding.UTF8.GetString(Convert.FromBase64String(encodedRelativePath));
 
             var projectItem = new SourceGeneratorProjectItem(
                 basePath: "/",

src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/IncompatibleProjectService.cs

@@ -16,20 +16,10 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 [method: ImportingConstructor]
 internal sealed class IncompatibleProjectService(IIncompatibleProjectNotifier incompatibleProjectNotifier) : IIncompatibleProjectService
 {
-    private static readonly ProjectId s_miscFilesProject = ProjectId.CreateNewId();
-
     private readonly IIncompatibleProjectNotifier _incompatibleProjectNotifier = incompatibleProjectNotifier;
 
     private ImmutableHashSet<ProjectId> _incompatibleProjectIds = [];
 
-    public void HandleMiscFilesDocument(TextDocument textDocument)
-    {
-        if (ImmutableInterlocked.Update(ref _incompatibleProjectIds, static set => set.Add(s_miscFilesProject)))
-        {
-            _incompatibleProjectNotifier.NotifyMiscFilesDocument(textDocument);
-        }
-    }
-
     public void HandleMissingDocument(RazorTextDocumentIdentifier? textDocumentIdentifier, RazorCohostRequestContext context)
     {
         if (context.Solution is null)

src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Microsoft.CodeAnalysis.Razor.CohostingShared.projitems

@@ -38,6 +38,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)OnAutoInsert\CohostOnAutoInsertTriggerCharacterProviders.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)RazorAnalyzerAssemblyRedirector.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)RazorSourceGeneratedDocumentSpanMappingService.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)RazorSourceGeneratorLocator.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Rename\CohostRenameEndpoint.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)SignatureHelp\CohostSignatureHelpEndpoint.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)FoldingRange\CohostFoldingRangeEndpoint.cs" />

src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/RazorSourceGeneratorLocator.cs

@@ -0,0 +1,18 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.ComponentModel.Composition;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
+using Microsoft.NET.Sdk.Razor.SourceGenerators;
+
+namespace Microsoft.CodeAnalysis.Razor.CohostingShared;
+
+[Export(typeof(IRazorSourceGeneratorLocator))]
+[method: ImportingConstructor]
+internal sealed class RazorSourceGeneratorLocator() : IRazorSourceGeneratorLocator
+{
+    public string GetGeneratorFilePath()
+    {
+        return typeof(RazorSourceGenerator).Assembly.Location;
+    }
+}

src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Cohost/AbstractCohostDocumentEndpoint.cs

@@ -22,15 +22,6 @@ internal abstract class AbstractCohostDocumentEndpoint<TRequest, TResponse>(
             return SpecializedTasks.Default<TResponse>();
         }
 
-        if (context.TextDocument.Project.FilePath is null)
-        {
-            // If the project file path is null, we can't compute the hint name, so we can't handle the request.
-            // This is likely a file in the misc files project, which we don't support yet anyway.
-            // TODO: Expose context.TextDocument.Project.Solution.WorkspaceKind through our EA to confirm?
-            _incompatibleProjectService.HandleMiscFilesDocument(context.TextDocument);
-            return SpecializedTasks.Default<TResponse>();
-        }
-
         return HandleRequestAsync(request, context, context.TextDocument, cancellationToken);
     }
 

src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Cohost/IIncompatibleProjectNotifier.cs

@@ -5,6 +5,5 @@ namespace Microsoft.CodeAnalysis.Razor.Cohost;
 
 internal interface IIncompatibleProjectNotifier
 {
-    void NotifyMiscFilesDocument(TextDocument textDocument);
     void NotifyMissingDocument(Project project, string filePath);
 }

src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Cohost/IIncompatibleProjectService.cs

@@ -7,6 +7,5 @@ namespace Microsoft.CodeAnalysis.Razor.Cohost;
 
 internal interface IIncompatibleProjectService
 {
-    void HandleMiscFilesDocument(TextDocument textDocument);
     void HandleMissingDocument(RazorTextDocumentIdentifier? textDocumentIdentifier, RazorCohostRequestContext context);
 }