Fix restore for 'dotnet run app.cs' in IDE (#78990)

Co-authored-by: Jason Malinowski <jason@jason-m.com>

Author: RikkiGibson

src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/DotnetCliHelper.cs

@@ -70,7 +70,7 @@ private async Task<string> GetDotnetSdkFolderFromDotnetExecutableAsync(string pr
 
     public Process Run(string[] arguments, string? workingDirectory, bool shouldLocalizeOutput, bool redirectStandardInput = false)
     {
-        _logger.LogDebug($"Running dotnet CLI command at {_dotnetExecutablePath.Value} in directory {workingDirectory} with arguments {arguments}");
+        _logger.LogDebug($"Running dotnet CLI command at {_dotnetExecutablePath.Value} in directory {workingDirectory} with arguments '{string.Join(' ', arguments)}'");
 
         var startInfo = new ProcessStartInfo(_dotnetExecutablePath.Value)
         {

src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/HostWorkspace/LoadedProject.cs

@@ -5,6 +5,7 @@
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.Host;
 using Microsoft.CodeAnalysis.LanguageServer.Handler.DebugConfiguration;
+using Microsoft.CodeAnalysis.LanguageServer.HostWorkspace.FileWatching;
 using Microsoft.CodeAnalysis.LanguageServer.HostWorkspace.ProjectTelemetry;
 using Microsoft.CodeAnalysis.MSBuild;
 using Microsoft.CodeAnalysis.ProjectSystem;
@@ -25,7 +26,8 @@ internal sealed class LoadedProject : IDisposable
 
     private readonly ProjectSystemProject _projectSystemProject;
     private readonly ProjectSystemProjectOptionsProcessor _optionsProcessor;
-    private readonly IFileChangeContext _fileChangeContext;
+    private readonly IFileChangeContext _sourceFileChangeContext;
+    private readonly IFileChangeContext _projectFileChangeContext;
     private readonly ProjectTargetFrameworkManager _targetFrameworkManager;
 
     /// <summary>
@@ -53,22 +55,16 @@ public LoadedProject(ProjectSystemProject projectSystemProject, SolutionServices
         // TODO: we only should listen for add/removals here, but we can't specify such a filter now
         _projectDirectory = Path.GetDirectoryName(_projectFilePath)!;
 
-        _fileChangeContext = fileWatcher.CreateContext([new(_projectDirectory, [".cs", ".cshtml", ".razor"])]);
-        _fileChangeContext.FileChanged += FileChangedContext_FileChanged;
+        _sourceFileChangeContext = fileWatcher.CreateContext([new(_projectDirectory, [".cs", ".cshtml", ".razor"])]);
+        _sourceFileChangeContext.FileChanged += SourceFileChangeContext_FileChanged;
 
-        // Start watching for file changes for the project file as well
-        _fileChangeContext.EnqueueWatchingFile(_projectFilePath);
+        _projectFileChangeContext = fileWatcher.CreateContext([]);
+        _projectFileChangeContext.FileChanged += ProjectFileChangeContext_FileChanged;
+        _projectFileChangeContext.EnqueueWatchingFile(_projectFilePath);
     }
 
-    private void FileChangedContext_FileChanged(object? sender, string filePath)
+    private void SourceFileChangeContext_FileChanged(object? sender, string filePath)
     {
-        // If the project file itself changed, we almost certainly need to reload the project.
-        if (string.Equals(filePath, _projectFilePath, StringComparison.OrdinalIgnoreCase))
-        {
-            NeedsReload?.Invoke(this, EventArgs.Empty);
-            return;
-        }
-
         var matchers = _mostRecentFileMatchers?.Value;
         if (matchers is null)
         {
@@ -92,6 +88,11 @@ private void FileChangedContext_FileChanged(object? sender, string filePath)
         }
     }
 
+    private void ProjectFileChangeContext_FileChanged(object? sender, string filePath)
+    {
+        NeedsReload?.Invoke(this, EventArgs.Empty);
+    }
+
     public event EventHandler? NeedsReload;
 
     public string? GetTargetFramework()
@@ -105,7 +106,8 @@ private void FileChangedContext_FileChanged(object? sender, string filePath)
     /// </summary>
     public void Dispose()
     {
-        _fileChangeContext.Dispose();
+        _sourceFileChangeContext.Dispose();
+        _projectFileChangeContext.Dispose();
         _optionsProcessor.Dispose();
         _projectSystemProject.RemoveFromWorkspace();
     }
@@ -221,7 +223,7 @@ public void Dispose()
             document => _projectSystemProject.RemoveDynamicSourceFile(document.FilePath),
             "Project {0} now has {1} dynamic file(s).");
 
-        WatchProjectAssetsFile(newProjectInfo, _fileChangeContext);
+        WatchProjectAssetsFile(newProjectInfo);
 
         var needsRestore = ProjectDependencyHelper.NeedsRestore(newProjectInfo, _mostRecentFileInfo, logger);
 
@@ -272,7 +274,7 @@ void UpdateProjectSystemProjectCollection<T>(IEnumerable<T> loadedCollection, IE
                 logger.LogTrace(logMessage, projectFullPathWithTargetFramework, newItems.Count);
         }
 
-        void WatchProjectAssetsFile(ProjectFileInfo currentProjectInfo, IFileChangeContext fileChangeContext)
+        void WatchProjectAssetsFile(ProjectFileInfo currentProjectInfo)
         {
             if (_mostRecentFileInfo?.ProjectAssetsFilePath == currentProjectInfo.ProjectAssetsFilePath)
             {
@@ -282,14 +284,9 @@ void WatchProjectAssetsFile(ProjectFileInfo currentProjectInfo, IFileChangeConte
 
             // Dispose of the last once since we're changing the file we're watching.
             _mostRecentProjectAssetsFileWatcher?.Dispose();
-
-            IWatchedFile? currentWatcher = null;
-            if (currentProjectInfo.ProjectAssetsFilePath != null)
-            {
-                currentWatcher = fileChangeContext.EnqueueWatchingFile(currentProjectInfo.ProjectAssetsFilePath);
-            }
-
-            _mostRecentProjectAssetsFileWatcher = currentWatcher;
+            _mostRecentProjectAssetsFileWatcher = currentProjectInfo.ProjectAssetsFilePath is { } assetsFilePath
+                    ? _projectFileChangeContext.EnqueueWatchingFile(assetsFilePath)
+                    : null;
         }
     }
 

src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/LanguageServer/Handler/Restore/RestoreHandler.cs

@@ -5,6 +5,7 @@
 using System.Collections.Immutable;
 using System.Composition;
 using Microsoft.CodeAnalysis.Host.Mef;
+using Microsoft.Extensions.Logging;
 using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.LanguageServer.Handler;
@@ -17,14 +18,16 @@ namespace Microsoft.CodeAnalysis.LanguageServer.Handler;
 [Method(MethodName)]
 [method: ImportingConstructor]
 [method: Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
-internal sealed class RestoreHandler(DotnetCliHelper dotnetCliHelper) : ILspServiceRequestHandler<RestoreParams, RestorePartialResult[]>
+internal sealed class RestoreHandler(DotnetCliHelper dotnetCliHelper, ILoggerFactory loggerFactory) : ILspServiceRequestHandler<RestoreParams, RestorePartialResult[]>
 {
     internal const string MethodName = "workspace/_roslyn_restore";
 
     public bool MutatesSolutionState => false;
 
     public bool RequiresLSPSolution => true;
 
+    private readonly ILogger<RestoreHandler> _logger = loggerFactory.CreateLogger<RestoreHandler>();
+
     public async Task<RestorePartialResult[]> HandleRequestAsync(RestoreParams request, RequestContext context, CancellationToken cancellationToken)
     {
         Contract.ThrowIfNull(context.Solution);
@@ -35,18 +38,31 @@ public async Task<RestorePartialResult[]> HandleRequestAsync(RestoreParams reque
         var restorePaths = GetRestorePaths(request, context.Solution, context);
         if (restorePaths.IsEmpty)
         {
+            _logger.LogDebug($"Restore was requested but no paths were provided.");
             progress.Report(new RestorePartialResult(LanguageServerResources.Restore, LanguageServerResources.Nothing_found_to_restore));
             return progress.GetValues() ?? [];
         }
 
-        await RestoreAsync(restorePaths, progress, cancellationToken);
+        _logger.LogDebug($"Running restore on {restorePaths.Length} paths, starting with '{restorePaths.First()}'.");
+        bool success = await RestoreAsync(restorePaths, progress, cancellationToken);
 
         progress.Report(new RestorePartialResult(LanguageServerResources.Restore, $"{LanguageServerResources.Restore_complete}{Environment.NewLine}"));
+        if (success)
+        {
+            _logger.LogDebug($"Restore completed successfully.");
+        }
+        else
+        {
+            _logger.LogError($"Restore completed with errors. See '.NET NuGet Restore' output window for more details.");
+        }
+
         return progress.GetValues() ?? [];
     }
 
-    private async Task RestoreAsync(ImmutableArray<string> pathsToRestore, BufferedProgress<RestorePartialResult> progress, CancellationToken cancellationToken)
+    /// <returns>True if all restore invocations exited with code 0. Otherwise, false.</returns>
+    private async Task<bool> RestoreAsync(ImmutableArray<string> pathsToRestore, BufferedProgress<RestorePartialResult> progress, CancellationToken cancellationToken)
     {
+        bool success = true;
         foreach (var path in pathsToRestore)
         {
             var arguments = new string[] { "restore", path };
@@ -71,9 +87,12 @@ private async Task RestoreAsync(ImmutableArray<string> pathsToRestore, BufferedP
             if (process.ExitCode != 0)
             {
                 ReportProgress(progress, stageName, string.Format(LanguageServerResources.Failed_to_run_restore_on_0, path));
+                success = false;
             }
         }
 
+        return success;
+
         static void ReportProgress(BufferedProgress<RestorePartialResult> progress, string stage, string? restoreOutput)
         {
             if (restoreOutput != null)