Re-enable stdio clients by fixing initialization sequence

src/PowerShellEditorServices.Hosting/EditorServicesLoader.cs

@@ -12,7 +12,7 @@
 using System.Management.Automation;
 using System.Management.Automation.Runspaces;
 
-#if DEBUG
+#if ASSEMBLY_LOAD_STACKTRACE
 using System.Diagnostics;
 #endif
 
@@ -98,7 +98,7 @@ public static EditorServicesLoader Create(
 
             AssemblyLoadContext.Default.Resolving += (AssemblyLoadContext _, AssemblyName asmName) =>
             {
-#if DEBUG
+#if ASSEMBLY_LOAD_STACKTRACE
                 logger.Log(PsesLogLevel.Diagnostic, $"Assembly resolve event fired for {asmName}. Stacktrace:\n{new StackTrace()}");
 #else
                 logger.Log(PsesLogLevel.Diagnostic, $"Assembly resolve event fired for {asmName}");
@@ -138,7 +138,7 @@ public static EditorServicesLoader Create(
             // Unlike in .NET Core, we need to be look for all dependencies in .NET Framework, not just PSES.dll
             AppDomain.CurrentDomain.AssemblyResolve += (object sender, ResolveEventArgs args) =>
             {
-#if DEBUG
+#if ASSEMBLY_LOAD_STACKTRACE
                 logger.Log(PsesLogLevel.Diagnostic, $"Assembly resolve event fired for {args.Name}. Stacktrace:\n{new StackTrace()}");
 #else
                 logger.Log(PsesLogLevel.Diagnostic, $"Assembly resolve event fired for {args.Name}");
@@ -208,6 +208,7 @@ public Task LoadAndRunEditorServicesAsync()
 #endif
 
             // Add the bundled modules to the PSModulePath
+            // TODO: Why do we do this in addition to passing the bundled module path to the host?
             UpdatePSModulePath();
 
             // Check to see if the configuration we have is valid

src/PowerShellEditorServices/Hosting/EditorServicesServerFactory.cs

@@ -152,6 +152,7 @@ public PsesDebugServer CreateDebugServerForTempSession(
                     .AddSerilog()
                     .SetMinimumLevel(LogLevel.Trace)) // TODO: Why randomly set to trace?
                 .AddSingleton<ILanguageServerFacade>(_ => null)
+                // TODO: Why add these for a debug server?!
                 .AddPsesLanguageServices(hostStartupInfo)
                 // For a Temp session, there is no LanguageServer so just set it to null
                 .AddSingleton(

src/PowerShellEditorServices/Server/PsesDebugServer.cs

@@ -3,7 +3,6 @@
 
 using System;
 using System.IO;
-using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
@@ -23,15 +22,10 @@ internal class PsesDebugServer : IDisposable
         private readonly Stream _inputStream;
         private readonly Stream _outputStream;
         private readonly TaskCompletionSource<bool> _serverStopped;
-
         private DebugAdapterServer _debugAdapterServer;
-
         private PsesInternalHost _psesHost;
-
         private bool _startedPses;
-
         private readonly bool _isTemp;
-
         protected readonly ILoggerFactory _loggerFactory;
 
         public PsesDebugServer(
@@ -91,10 +85,12 @@ public async Task StartAsync()
                     .WithHandler<DebugEvaluateHandler>()
                     // The OnInitialize delegate gets run when we first receive the _Initialize_ request:
                     // https://microsoft.github.io/debug-adapter-protocol/specification#Requests_Initialize
-                    .OnInitialize(async (server, _, _) =>
+                    .OnInitialize(async (server, _, cancellationToken) =>
                     {
-                        // We need to make sure the host has been started
-                        _startedPses = !await _psesHost.TryStartAsync(new HostStartOptions(), CancellationToken.None).ConfigureAwait(false);
+                        // Start the host if not already started, and enable debug mode (required
+                        // for remote debugging).
+                        _startedPses = !await _psesHost.TryStartAsync(new HostStartOptions(), cancellationToken).ConfigureAwait(false);
+                        _psesHost.DebugContext.EnableDebugMode();
 
                         // We need to give the host a handle to the DAP so it can register
                         // notifications (specifically for sendKeyPress).
@@ -103,11 +99,8 @@ public async Task StartAsync()
                             _psesHost.DebugServer = server;
                         }
 
-                        // Ensure the debugger mode is set correctly - this is required for remote debugging to work
-                        _psesHost.DebugContext.EnableDebugMode();
-
+                        // Clear any existing breakpoints before proceeding.
                         BreakpointService breakpointService = server.GetService<BreakpointService>();
-                        // Clear any existing breakpoints before proceeding
                         await breakpointService.RemoveAllBreakpointsAsync().ConfigureAwait(false);
                     })
                     // The OnInitialized delegate gets run right before the server responds to the _Initialize_ request:

src/PowerShellEditorServices/Server/PsesLanguageServer.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
-using System;
 using System.IO;
 using System.Threading.Tasks;
 using Microsoft.Extensions.DependencyInjection;
@@ -12,6 +11,8 @@
 using Microsoft.PowerShell.EditorServices.Services.Extension;
 using Microsoft.PowerShell.EditorServices.Services.PowerShell.Host;
 using Microsoft.PowerShell.EditorServices.Services.Template;
+using Newtonsoft.Json.Linq;
+using OmniSharp.Extensions.LanguageServer.Protocol.Models;
 using OmniSharp.Extensions.LanguageServer.Protocol.Server;
 using OmniSharp.Extensions.LanguageServer.Server;
 using Serilog;
@@ -24,15 +25,12 @@ namespace Microsoft.PowerShell.EditorServices.Server
     internal class PsesLanguageServer
     {
         internal ILoggerFactory LoggerFactory { get; }
-
         internal ILanguageServer LanguageServer { get; private set; }
-
         private readonly LogLevel _minimumLogLevel;
         private readonly Stream _inputStream;
         private readonly Stream _outputStream;
         private readonly HostStartupInfo _hostDetails;
         private readonly TaskCompletionSource<bool> _serverStart;
-
         private PsesInternalHost _psesHost;
 
         /// <summary>
@@ -117,33 +115,32 @@ public async Task StartAsync()
                     // _Initialize_ request:
                     // https://microsoft.github.io/language-server-protocol/specifications/specification-current/#initialize
                     .OnInitialize(
-                        (languageServer, request, _) =>
+                        (languageServer, initializeParams, cancellationToken) =>
                         {
-                            Log.Logger.Debug("Initializing OmniSharp Language Server");
-
-                            IServiceProvider serviceProvider = languageServer.Services;
-
-                            _psesHost = serviceProvider.GetService<PsesInternalHost>();
-
-                            WorkspaceService workspaceService = serviceProvider.GetService<WorkspaceService>();
-
-                            // Grab the workspace path from the parameters
-                            if (request.RootUri != null)
-                            {
-                                workspaceService.WorkspacePath = request.RootUri.GetFileSystemPath();
-                            }
-                            else if (request.WorkspaceFolders != null)
+                            // Set the workspace path from the parameters.
+                            WorkspaceService workspaceService = languageServer.Services.GetService<WorkspaceService>();
+                            if (initializeParams.WorkspaceFolders is not null)
                             {
-                                // If RootUri isn't set, try to use the first WorkspaceFolder.
                                 // TODO: Support multi-workspace.
-                                foreach (OmniSharp.Extensions.LanguageServer.Protocol.Models.WorkspaceFolder workspaceFolder in request.WorkspaceFolders)
+                                foreach (WorkspaceFolder workspaceFolder in initializeParams.WorkspaceFolders)
                                 {
                                     workspaceService.WorkspacePath = workspaceFolder.Uri.GetFileSystemPath();
                                     break;
                                 }
                             }
 
-                            return Task.CompletedTask;
+                            // Parse initialization options.
+                            JObject initializationOptions = initializeParams.InitializationOptions as JObject;
+                            HostStartOptions hostStartOptions = new()
+                            {
+                                LoadProfiles = initializationOptions?.GetValue("EnableProfileLoading")?.Value<bool>() ?? false,
+                                // TODO: Consider deprecating the setting which sets this and
+                                // instead use WorkspacePath exclusively.
+                                InitialWorkingDirectory = initializationOptions?.GetValue("InitialWorkingDirectory")?.Value<string>() ?? workspaceService.WorkspacePath
+                            };
+
+                            _psesHost = languageServer.Services.GetService<PsesInternalHost>();
+                            return _psesHost.TryStartAsync(hostStartOptions, cancellationToken);
                         });
             }).ConfigureAwait(false);
 
@@ -156,7 +153,6 @@ public async Task StartAsync()
         /// <returns>A task that completes when the server is shut down.</returns>
         public async Task WaitForShutdown()
         {
-            Log.Logger.Debug("Shutting down OmniSharp Language Server");
             await _serverStart.Task.ConfigureAwait(false);
             await LanguageServer.WaitForExit.ConfigureAwait(false);
 

src/PowerShellEditorServices/Server/PsesServiceCollectionExtensions.cs

@@ -44,11 +44,10 @@ public static IServiceCollection AddPsesLanguageServices(
                             provider.GetService<EditorOperationsService>(),
                             provider.GetService<IInternalPowerShellExecutionService>());
 
-                        // This is where we create the $psEditor variable
-                        // so that when the console is ready, it will be available
-                        // TODO: Improve the sequencing here so that:
-                        //  - The variable is guaranteed to be initialized when the console first appears
-                        //  - Any errors that occur are handled rather than lost by the unawaited task
+                        // This is where we create the $psEditor variable so that when the console
+                        // is ready, it will be available. NOTE: We cannot await this because it
+                        // uses a lazy initialization to avoid a race with the dependency injection
+                        // framework, see the EditorObject class for that!
                         extensionService.InitializeAsync();
 
                         return extensionService;

src/PowerShellEditorServices/Services/PowerShell/Host/NullPSHostRawUI.cs

@@ -12,44 +12,38 @@ internal class NullPSHostRawUI : PSHostRawUserInterface
 
         public NullPSHostRawUI() => _buffer = new BufferCell[0, 0];
 
-        public override ConsoleColor BackgroundColor { get; set; }
-        public override Size BufferSize { get; set; }
-        public override Coordinates CursorPosition { get; set; }
-        public override int CursorSize { get; set; }
-        public override ConsoleColor ForegroundColor { get; set; }
+        public override Coordinates WindowPosition { get; set; }
 
-        public override bool KeyAvailable => false;
+        public override Size MaxWindowSize => new() { Width = _buffer.GetLength(0), Height = _buffer.GetLength(1) };
 
         public override Size MaxPhysicalWindowSize => MaxWindowSize;
 
-        public override Size MaxWindowSize => new() { Width = _buffer.GetLength(0), Height = _buffer.GetLength(1) };
+        public override bool KeyAvailable => false;
+
+        public override ConsoleColor ForegroundColor { get; set; }
+
+        public override int CursorSize { get; set; }
+
+        public override Coordinates CursorPosition { get; set; }
+
+        public override Size BufferSize { get; set; }
+
+        public override ConsoleColor BackgroundColor { get; set; }
 
-        public override Coordinates WindowPosition { get; set; }
         public override Size WindowSize { get; set; }
+
         public override string WindowTitle { get; set; }
 
-        public override void FlushInputBuffer()
-        {
-            // Do nothing
-        }
+        public override void FlushInputBuffer() { }
 
         public override BufferCell[,] GetBufferContents(Rectangle rectangle) => _buffer;
 
         public override KeyInfo ReadKey(ReadKeyOptions options) => default;
 
-        public override void ScrollBufferContents(Rectangle source, Coordinates destination, Rectangle clip, BufferCell fill)
-        {
-            // Do nothing
-        }
+        public override void ScrollBufferContents(Rectangle source, Coordinates destination, Rectangle clip, BufferCell fill) { }
 
-        public override void SetBufferContents(Coordinates origin, BufferCell[,] contents)
-        {
-            // Do nothing
-        }
+        public override void SetBufferContents(Coordinates origin, BufferCell[,] contents) { }
 
-        public override void SetBufferContents(Rectangle rectangle, BufferCell fill)
-        {
-            // Do nothing
-        }
+        public override void SetBufferContents(Rectangle rectangle, BufferCell fill) { }
     }
 }

src/PowerShellEditorServices/Services/PowerShell/Host/NullPSHostUI.cs

@@ -14,6 +14,8 @@ internal class NullPSHostUI : PSHostUserInterface
     {
         public NullPSHostUI() => RawUI = new NullPSHostRawUI();
 
+        public override bool SupportsVirtualTerminal => false;
+
         public override PSHostRawUserInterface RawUI { get; }
 
         public override Dictionary<string, PSObject> Prompt(string caption, string message, Collection<FieldDescription> descriptions) => new();
@@ -29,44 +31,26 @@ public override PSCredential PromptForCredential(string caption, string message,
 
         public override SecureString ReadLineAsSecureString() => new();
 
-        public override void Write(ConsoleColor foregroundColor, ConsoleColor backgroundColor, string value)
-        {
-            // Do nothing
-        }
-
-        public override void Write(string value)
-        {
-            // Do nothing
-        }
-
-        public override void WriteDebugLine(string message)
-        {
-            // Do nothing
-        }
-
-        public override void WriteErrorLine(string value)
-        {
-            // Do nothing
-        }
-
-        public override void WriteLine(string value)
-        {
-            // Do nothing
-        }
-
-        public override void WriteProgress(long sourceId, ProgressRecord record)
-        {
-            // Do nothing
-        }
-
-        public override void WriteVerboseLine(string message)
-        {
-            // Do nothing
-        }
-
-        public override void WriteWarningLine(string message)
-        {
-            // Do nothing
-        }
+        public override void Write(ConsoleColor foregroundColor, ConsoleColor backgroundColor, string value) { }
+
+        public override void Write(string value) { }
+
+        public override void WriteDebugLine(string message) { }
+
+        public override void WriteErrorLine(string value) { }
+
+        public override void WriteInformation(InformationRecord record) { }
+
+        public override void WriteLine() { }
+
+        public override void WriteLine(ConsoleColor foregroundColor, ConsoleColor backgroundColor, string value) { }
+
+        public override void WriteLine(string value) { }
+
+        public override void WriteProgress(long sourceId, ProgressRecord record) { }
+
+        public override void WriteVerboseLine(string message) { }
+
+        public override void WriteWarningLine(string message) { }
     }
 }