Revert "Update project configuration from Roslyn info (dotnet#11092)"

This reverts commit a37ee12, reversing
changes made to ad74439.

src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/RazorConfiguration.cs

@@ -3,7 +3,6 @@
 
 using System.Collections.Immutable;
 using System.Linq;
-using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.Extensions.Internal;
 
 namespace Microsoft.AspNetCore.Razor.Language;
@@ -14,14 +13,15 @@ public sealed record class RazorConfiguration(
     ImmutableArray<RazorExtension> Extensions,
     bool UseConsolidatedMvcViews = true,
     bool SuppressAddComponentParameter = false,
-    LanguageServerFlags? LanguageServerFlags = null,
-    bool UseRoslynTokenizer = false,
-    LanguageVersion CSharpLanguageVersion = LanguageVersion.Default)
+    LanguageServerFlags? LanguageServerFlags = null)
 {
     public static readonly RazorConfiguration Default = new(
         RazorLanguageVersion.Latest,
         ConfigurationName: "unnamed",
-        Extensions: []);
+        Extensions: [],
+        UseConsolidatedMvcViews: true,
+        SuppressAddComponentParameter: false,
+        LanguageServerFlags: null);
 
     public bool Equals(RazorConfiguration? other)
         => other is not null &&
@@ -30,8 +30,6 @@ public bool Equals(RazorConfiguration? other)
            SuppressAddComponentParameter == other.SuppressAddComponentParameter &&
            LanguageServerFlags == other.LanguageServerFlags &&
            UseConsolidatedMvcViews == other.UseConsolidatedMvcViews &&
-           UseRoslynTokenizer == other.UseRoslynTokenizer &&
-           CSharpLanguageVersion == other.CSharpLanguageVersion &&
            Extensions.SequenceEqual(other.Extensions);
 
     public override int GetHashCode()
@@ -43,8 +41,6 @@ public override int GetHashCode()
         hash.Add(SuppressAddComponentParameter);
         hash.Add(UseConsolidatedMvcViews);
         hash.Add(LanguageServerFlags);
-        hash.Add(UseRoslynTokenizer);
-        hash.Add(CSharpLanguageVersion);
         return hash;
     }
 }

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

@@ -56,7 +56,8 @@ public partial class RazorSourceGenerator
             var razorConfiguration = new RazorConfiguration(razorLanguageVersion, configurationName ?? "default", Extensions: [], UseConsolidatedMvcViews: true, SuppressAddComponentParameter: !isComponentParameterSupported);
 
             // We use the new tokenizer only when requested for now.
-            var useRoslynTokenizer = parseOptions.UseRoslynTokenizer();
+            var useRoslynTokenizer = parseOptions.Features.TryGetValue("use-roslyn-tokenizer", out var useRoslynTokenizerValue)
+                                    && string.Equals(useRoslynTokenizerValue, "true", StringComparison.OrdinalIgnoreCase);
 
             var razorSourceGenerationOptions = new RazorSourceGenerationOptions()
             {

src/Razor/benchmarks/Microsoft.AspNetCore.Razor.Microbenchmarks/LanguageServer/RazorLanguageServerBenchmarkBase.cs

@@ -75,7 +75,7 @@ await projectManager.UpdateAsync(
             {
                 updater.ProjectAdded(hostProject);
                 var tagHelpers = CommonResources.LegacyTagHelpers;
-                var projectWorkspaceState = ProjectWorkspaceState.Create(tagHelpers);
+                var projectWorkspaceState = ProjectWorkspaceState.Create(tagHelpers, CodeAnalysis.CSharp.LanguageVersion.CSharp11);
                 updater.ProjectWorkspaceStateChanged(hostProject.Key, projectWorkspaceState);
                 updater.DocumentAdded(hostProject.Key, hostDocument, textLoader);
             },

src/Razor/benchmarks/Microsoft.AspNetCore.Razor.Microbenchmarks/Resources/Telerik/Kendo.Mvc.Examples.project.razor.json

@@ -1,12 +1,10 @@
 {
-  "__Version": 7,
+  "__Version": 6,
   "ProjectKey": "C:\\Users\\admin\\location\\Kendo.Mvc.Examples\\obj\\Debug\\net7.0\\",
   "FilePath": "C:\\Users\\admin\\location\\Kendo.Mvc.Examples\\Kendo.Mvc.Examples.csproj",
   "Configuration": {
     "ConfigurationName": "MVC-3.0",
     "LanguageVersion": "7.0",
-    "UseRoslynTokenizer": true,
-    "CSharpLanguageVersion": 1100,
     "Extensions": [
       "MVC-3.0"
     ]
@@ -159528,7 +159526,8 @@
           "Runtime.Name": "Components.None"
         }
       }
-    ]
+    ],
+    "CSharpLanguageVersion": 1100
   },
   "RootNamespace": "Kendo.Mvc.Examples",
   "Documents": [

src/Razor/benchmarks/Microsoft.AspNetCore.Razor.Microbenchmarks/Resources/project.razor.json

@@ -1,12 +1,10 @@
 {
-  "__Version": 7,
+  "__Version": 6,
   "ProjectKey": "C:\\Users\\admin\\location\\blazorserver\\obj\\Debug\\net7.0\\",
   "FilePath": "C:\\Users\\admin\\location\\blazorserver\\blazorserver.csproj",
   "Configuration": {
     "ConfigurationName": "MVC-3.0",
     "LanguageVersion": "3.0",
-    "UseRoslynTokenizer": true,
-    "CSharpLanguageVersion": 800,
     "Extensions": [ "MVC-3.0" ]
   },
   "ProjectWorkspaceState": {
@@ -16127,7 +16125,8 @@
           "Runtime.Name": "Components.None"
         }
       }
-    ]
+    ],
+    "CSharpLanguageVersion": 800
   },
   "RootNamespace": "blazorserver",
   "Documents": [

src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/ProjectSystem/RazorProjectService.cs

@@ -366,16 +366,17 @@ private Task AddOrUpdateProjectCoreAsync(
 
                 if (!projectWorkspaceState.Equals(ProjectWorkspaceState.Default))
                 {
-                    _logger.LogInformation($"Updating project '{project.Key}' TagHelpers ({projectWorkspaceState.TagHelpers.Length}).");
+                    _logger.LogInformation($"Updating project '{project.Key}' TagHelpers ({projectWorkspaceState.TagHelpers.Length}) and C# Language Version ({projectWorkspaceState.CSharpLanguageVersion}).");
                 }
 
                 updater.ProjectWorkspaceStateChanged(project.Key, projectWorkspaceState);
 
+                var currentConfiguration = project.Configuration;
                 var currentRootNamespace = project.RootNamespace;
-                if (project.Configuration == configuration &&
+                if (currentConfiguration.ConfigurationName == configuration?.ConfigurationName &&
                     currentRootNamespace == rootNamespace)
                 {
-                    _logger.LogTrace($"Skipping configuration update for '{project.Key}' as the configuration and root namespace are unchanged.");
+                    _logger.LogTrace($"Updating project '{project.Key}'. The project is already using configuration '{configuration.ConfigurationName}' and root namespace '{rootNamespace}'.");
                     return;
                 }
 
@@ -384,9 +385,14 @@ private Task AddOrUpdateProjectCoreAsync(
                     configuration = FallbackRazorConfiguration.Latest;
                     _logger.LogInformation($"Updating project '{project.Key}' to use the latest configuration ('{configuration.ConfigurationName}')'.");
                 }
-                else
+                else if (currentConfiguration.ConfigurationName != configuration.ConfigurationName)
                 {
-                    _logger.LogInformation($"Updating project '{project.Key}' to Razor configuration '{configuration.ConfigurationName}', namespace '{rootNamespace}', with language version '{configuration.LanguageVersion}'.");
+                    _logger.LogInformation($"Updating project '{project.Key}' to Razor configuration '{configuration.ConfigurationName}' with language version '{configuration.LanguageVersion}'.");
+                }
+
+                if (currentRootNamespace != rootNamespace)
+                {
+                    _logger.LogInformation($"Updating project '{project.Key}''s root namespace to '{rootNamespace}'.");
                 }
 
                 var hostProject = new HostProject(project.FilePath, project.IntermediateOutputPath, configuration, rootNamespace, displayName);

src/Razor/src/Microsoft.AspNetCore.Razor.ProjectEngineHost/ProjectSystem/ProjectWorkspaceState.cs

@@ -5,40 +5,52 @@
 using System.Collections.Immutable;
 using System.Linq;
 using Microsoft.AspNetCore.Razor.Language;
+using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.Extensions.Internal;
 
 namespace Microsoft.AspNetCore.Razor.ProjectSystem;
 
 internal sealed class ProjectWorkspaceState : IEquatable<ProjectWorkspaceState>
 {
-    public static readonly ProjectWorkspaceState Default = new(ImmutableArray<TagHelperDescriptor>.Empty);
+    public static readonly ProjectWorkspaceState Default = new(ImmutableArray<TagHelperDescriptor>.Empty, LanguageVersion.Default);
 
     public ImmutableArray<TagHelperDescriptor> TagHelpers { get; }
+    public LanguageVersion CSharpLanguageVersion { get; }
 
     private ProjectWorkspaceState(
-        ImmutableArray<TagHelperDescriptor> tagHelpers)
+        ImmutableArray<TagHelperDescriptor> tagHelpers,
+        LanguageVersion csharpLanguageVersion)
     {
         TagHelpers = tagHelpers;
+        CSharpLanguageVersion = csharpLanguageVersion;
     }
 
     public static ProjectWorkspaceState Create(
-        ImmutableArray<TagHelperDescriptor> tagHelpers)
-        => tagHelpers.IsEmpty
+        ImmutableArray<TagHelperDescriptor> tagHelpers,
+        LanguageVersion csharpLanguageVersion = LanguageVersion.Default)
+        => tagHelpers.IsEmpty && csharpLanguageVersion == LanguageVersion.Default
             ? Default
-            : new(tagHelpers);
+            : new(tagHelpers, csharpLanguageVersion);
+
+    public static ProjectWorkspaceState Create(LanguageVersion csharpLanguageVersion)
+        => csharpLanguageVersion == LanguageVersion.Default
+            ? Default
+            : new(ImmutableArray<TagHelperDescriptor>.Empty, csharpLanguageVersion);
 
     public override bool Equals(object? obj)
         => obj is ProjectWorkspaceState other && Equals(other);
 
     public bool Equals(ProjectWorkspaceState? other)
         => other is not null &&
-           TagHelpers.SequenceEqual(other.TagHelpers);
+           TagHelpers.SequenceEqual(other.TagHelpers) &&
+           CSharpLanguageVersion == other.CSharpLanguageVersion;
 
     public override int GetHashCode()
     {
         var hash = HashCodeCombiner.Start();
 
         hash.Add(TagHelpers);
+        hash.Add(CSharpLanguageVersion);
 
         return hash.CombinedHash;
     }

src/Razor/src/Microsoft.AspNetCore.Razor.ProjectEngineHost/Serialization/MessagePack/Formatters/ProjectWorkspaceStateFormatter.cs

@@ -8,6 +8,7 @@
 using Microsoft.AspNetCore.Razor.ProjectSystem;
 using Microsoft.AspNetCore.Razor.Serialization.MessagePack.Formatters.TagHelpers;
 using Microsoft.AspNetCore.Razor.Utilities;
+using Microsoft.CodeAnalysis.CSharp;
 
 namespace Microsoft.AspNetCore.Razor.Serialization.MessagePack.Formatters;
 
@@ -21,7 +22,7 @@ private ProjectWorkspaceStateFormatter()
 
     public override ProjectWorkspaceState Deserialize(ref MessagePackReader reader, SerializerCachingOptions options)
     {
-        reader.ReadArrayHeaderAndVerify(2);
+        reader.ReadArrayHeaderAndVerify(3);
 
         var checksums = reader.Deserialize<ImmutableArray<Checksum>>(options);
 
@@ -46,17 +47,19 @@ public override ProjectWorkspaceState Deserialize(ref MessagePackReader reader,
         }
 
         var tagHelpers = builder.DrainToImmutable();
+        var csharpLanguageVersion = (LanguageVersion)reader.ReadInt32();
 
-        return ProjectWorkspaceState.Create(tagHelpers);
+        return ProjectWorkspaceState.Create(tagHelpers, csharpLanguageVersion);
     }
 
     public override void Serialize(ref MessagePackWriter writer, ProjectWorkspaceState value, SerializerCachingOptions options)
     {
-        writer.WriteArrayHeader(2);
+        writer.WriteArrayHeader(3);
 
         var checksums = value.TagHelpers.SelectAsArray(x => x.Checksum);
 
         writer.Serialize(checksums, options);
         writer.Serialize(value.TagHelpers, options);
+        writer.Write((int)value.CSharpLanguageVersion);
     }
 }

src/Razor/src/Microsoft.AspNetCore.Razor.ProjectEngineHost/Serialization/MessagePack/Formatters/RazorConfigurationFormatter.cs

@@ -4,18 +4,13 @@
 using MessagePack;
 using Microsoft.AspNetCore.Razor.Language;
 using Microsoft.AspNetCore.Razor.PooledObjects;
-using Microsoft.CodeAnalysis.CSharp;
 
 namespace Microsoft.AspNetCore.Razor.Serialization.MessagePack.Formatters;
 
 internal sealed class RazorConfigurationFormatter : ValueFormatter<RazorConfiguration>
 {
     public static readonly ValueFormatter<RazorConfiguration> Instance = new RazorConfigurationFormatter();
 
-    // The count of properties in RazorConfiguration that are serialized. The number of Extensions will be added
-    // to this, for the final serialized value count.
-    private const int SerializedPropertyCount = 6;
-
     private RazorConfigurationFormatter()
     {
     }
@@ -29,10 +24,8 @@ public override RazorConfiguration Deserialize(ref MessagePackReader reader, Ser
         var languageVersionText = CachedStringFormatter.Instance.Deserialize(ref reader, options) ?? string.Empty;
         var suppressAddComponentParameter = reader.ReadBoolean();
         var useConsolidatedMvcViews = reader.ReadBoolean();
-        var useRoslynTokenizer = reader.ReadBoolean();
-        var csharpLanguageVersion = (LanguageVersion)reader.ReadInt32();
 
-        count -= SerializedPropertyCount;
+        count -= 4;
 
         using var builder = new PooledArrayBuilder<RazorExtension>();
 
@@ -53,16 +46,14 @@ public override RazorConfiguration Deserialize(ref MessagePackReader reader, Ser
             configurationName,
             extensions,
             UseConsolidatedMvcViews: useConsolidatedMvcViews,
-            SuppressAddComponentParameter: suppressAddComponentParameter,
-            UseRoslynTokenizer: useRoslynTokenizer,
-            CSharpLanguageVersion: csharpLanguageVersion);
+            SuppressAddComponentParameter: suppressAddComponentParameter);
     }
 
     public override void Serialize(ref MessagePackWriter writer, RazorConfiguration value, SerializerCachingOptions options)
     {
-        // Write SerializedPropertyCount values + 1 value per extension.
+        // Write 4 values + 1 value per extension.
         var extensions = value.Extensions;
-        var count = extensions.Length + SerializedPropertyCount;
+        var count = extensions.Length + 4;
 
         writer.WriteArrayHeader(count);
 
@@ -79,10 +70,8 @@ public override void Serialize(ref MessagePackWriter writer, RazorConfiguration
 
         writer.Write(value.SuppressAddComponentParameter);
         writer.Write(value.UseConsolidatedMvcViews);
-        writer.Write(value.UseRoslynTokenizer);
-        writer.Write((int)value.CSharpLanguageVersion);
 
-        count -= SerializedPropertyCount;
+        count -= 4;
 
         for (var i = 0; i < count; i++)
         {

src/Razor/src/Microsoft.AspNetCore.Razor.ProjectEngineHost/Serialization/MessagePack/SerializationFormat.cs

@@ -9,5 +9,5 @@ internal static class SerializationFormat
     // or any of the types that compose it changes. This includes: RazorConfiguration,
     // ProjectWorkspaceState, TagHelperDescriptor, and DocumentSnapshotHandle.
     // NOTE: If this version is changed, a coordinated insertion is required between Roslyn and Razor for the C# extension.
-    public const int Version = 7;
+    public const int Version = 6;
 }

src/Razor/src/Microsoft.AspNetCore.Razor.ProjectEngineHost/Utilities/RazorProjectInfoFactory.cs

@@ -18,7 +18,6 @@
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.Razor;
 using Microsoft.CodeAnalysis.Razor.Compiler.CSharp;
-using Microsoft.NET.Sdk.Razor.SourceGenerators;
 
 namespace Microsoft.AspNetCore.Razor.Utilities;
 
@@ -56,9 +55,7 @@ static RazorProjectInfoFactory()
             return null;
         }
 
-        var csharpParseOptions = project.ParseOptions as CSharpParseOptions ?? CSharpParseOptions.Default;
-        var csharpLanguageVersion = csharpParseOptions.LanguageVersion;
-        var useRoslynTokenizer = csharpParseOptions.UseRoslynTokenizer();
+        var csharpLanguageVersion = (project.ParseOptions as CSharpParseOptions)?.LanguageVersion ?? LanguageVersion.Default;
 
         var compilation = await project.GetCompilationAsync(cancellationToken).ConfigureAwait(false);
         if (compilation is null)
@@ -79,7 +76,6 @@ static RazorProjectInfoFactory()
 
             builder.SetCSharpLanguageVersion(csharpLanguageVersion);
             builder.SetSupportLocalizedComponentNames(); // ProjectState in MS.CA.Razor.Workspaces does this, so I'm doing it too!
-            builder.Features.Add(new ConfigureRazorParserOptions(useRoslynTokenizer, csharpParseOptions));
         };
 
         var engineFactory = ProjectEngineFactories.DefaultProvider.GetFactory(configuration);
@@ -91,7 +87,7 @@ static RazorProjectInfoFactory()
 
         var tagHelpers = await project.GetTagHelpersAsync(engine, NoOpTelemetryReporter.Instance, cancellationToken).ConfigureAwait(false);
 
-        var projectWorkspaceState = ProjectWorkspaceState.Create(tagHelpers);
+        var projectWorkspaceState = ProjectWorkspaceState.Create(tagHelpers, csharpLanguageVersion);
 
         return new RazorProjectInfo(
             projectKey: new ProjectKey(intermediateOutputPath),

src/Razor/src/Microsoft.AspNetCore.Razor.ProjectEngineHost/Utilities/StreamExtensions.NetCore.cs

@@ -1,14 +1,14 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the MIT license. See License.txt in the project root for license information.
 
+using Microsoft.AspNetCore.Razor.ProjectSystem;
 using System;
 using System.Buffers;
 using System.Diagnostics;
 using System.IO;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.AspNetCore.Razor.ProjectSystem;
 
 namespace Microsoft.AspNetCore.Razor.Utilities;