CmdPal: Make debugging extension load errors easier (#41251)

Turns out we didn't log all the HRESULTs for failing to load an
extension. This adds more logging.

It also adds a context command on the log command to make it easier to
get to the log files

src/common/ManagedCommon/Logger.cs

@@ -32,17 +32,8 @@ namespace ManagedCommon
         /// <param name="isLocalLow">If the process using Logger is a low-privilege process.</param>
         public static void InitializeLogger(string applicationLogPath, bool isLocalLow = false)
         {
-            string basePath;
-            if (isLocalLow)
-            {
-                basePath = Environment.GetEnvironmentVariable("userprofile") + "\\appdata\\LocalLow\\Microsoft\\PowerToys" + applicationLogPath;
-            }
-            else
-            {
-                basePath = Constants.AppDataPath() + applicationLogPath;
-            }
-
-            string versionedPath = Path.Combine(basePath, Version);
+            string versionedPath = LogDirectoryPath(applicationLogPath, isLocalLow);
+            string basePath = Path.GetDirectoryName(versionedPath);
 
             if (!Directory.Exists(versionedPath))
             {
@@ -59,6 +50,22 @@ namespace ManagedCommon
             Task.Run(() => DeleteOldVersionLogFolders(basePath, versionedPath));
         }
 
+        public static string LogDirectoryPath(string applicationLogPath, bool isLocalLow = false)
+        {
+            string basePath;
+            if (isLocalLow)
+            {
+                basePath = Environment.GetEnvironmentVariable("userprofile") + "\\appdata\\LocalLow\\Microsoft\\PowerToys" + applicationLogPath;
+            }
+            else
+            {
+                basePath = Constants.AppDataPath() + applicationLogPath;
+            }
+
+            string versionedPath = Path.Combine(basePath, Version);
+            return versionedPath;
+        }
+
         /// <summary>
         /// Deletes old version log folders, keeping only the current version's folder.
         /// </summary>

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Commands/FallbackLogItem.cs

@@ -2,6 +2,7 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using ManagedCommon;
 using Microsoft.CmdPal.UI.ViewModels.Commands;
 using Microsoft.CmdPal.UI.ViewModels.Properties;
 using Microsoft.CommandPalette.Extensions.Toolkit;
@@ -19,6 +20,10 @@ internal sealed partial class FallbackLogItem : FallbackCommandItem
         Title = string.Empty;
         _logMessagesPage.Name = string.Empty;
         Subtitle = Properties.Resources.builtin_log_subtitle;
+
+        var logPath = Logger.LogDirectoryPath("\\CmdPal\\Logs\\");
+        var openLogCommand = new OpenFileCommand(logPath) { Name = Resources.builtin_log_folder_command_name };
+        MoreCommands = [new CommandContextItem(openLogCommand)];
     }
 
     public override void UpdateQuery(string query)

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Models/ExtensionWrapper.cs

@@ -126,6 +126,10 @@ public class ExtensionWrapper : IExtensionWrapper
                                 // We'll just return out nothing.
                                 return;
                             }
+                            else if (hr.Value != 0)
+                            {
+                                Logger.LogError($"Failed to find {ExtensionDisplayName}: {hr.Value}");
+                            }
 
                             // Marshal.ThrowExceptionForHR(hr);
                             _extensionObject = MarshalInterface<IExtension>.FromAbi((nint)extensionPtr);

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Properties/Resources.Designer.cs

@@ -285,6 +285,15 @@ namespace Microsoft.CmdPal.UI.ViewModels.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to View log folder.
+        /// </summary>
+        public static string builtin_log_folder_command_name {
+            get {
+                return ResourceManager.GetString("builtin_log_folder_command_name", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to View log.
         /// </summary>

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Properties/Resources.resx

@@ -135,6 +135,9 @@
   <data name="builtin_log_title" xml:space="preserve">
     <value>View log</value>
   </data>
+  <data name="builtin_log_folder_command_name" xml:space="preserve">
+    <value>View log folder</value>
+  </data>
   <data name="builtin_reload_subtitle" xml:space="preserve">
     <value>Reload Command Palette extensions</value>
   </data>