Route error-context DisplayMessage calls to stderr in BaseCommand

src/Aspire.Cli/Commands/BaseCommand.cs

@@ -61,6 +61,8 @@ protected BaseCommand(string name, string description, IFeatures features, ICliU
                 result = CommandResult.Failure((int)CliExitCodes.MissingRequiredArgument);
             }
 
+            var isErrorExitCode = result.ExitCode != CliExitCodes.Success;
+
             if (result.ErrorMessage is not null)
             {
                 interactionService.DisplayError(result.ErrorMessage);
@@ -74,18 +76,19 @@ protected BaseCommand(string name, string description, IFeatures features, ICliU
 
             if (result.ShouldDisplayCancellationMessage)
             {
-                interactionService.DisplayCancellationMessage();
+                interactionService.DisplayCancellationMessage(isErrorExitCode ? ConsoleOutput.Error : null);
             }
 
             // Display the CLI log file path on non-zero exit codes so the user knows
             // where to find diagnostic details. Suppress for user-input errors where
             // the log wouldn't contain useful context (e.g., missing required arguments).
-            if (result.ExitCode != CliExitCodes.Success && result.ExitCode != CliExitCodes.MissingRequiredArgument)
+            if (isErrorExitCode && result.ExitCode != CliExitCodes.MissingRequiredArgument)
             {
                 interactionService.DisplayMessage(
                     KnownEmojis.PageFacingUp,
                     string.Format(CultureInfo.CurrentCulture, InteractionServiceStrings.SeeLogsAt, MarkupHelpers.SafeFileLink(interactionService, executionContext.LogFilePath)),
-                    allowMarkup: true);
+                    allowMarkup: true,
+                    consoleOverride: ConsoleOutput.Error);
 
                 // If we connected to a running app host, also display the log file path of
                 // the CLI process that launched it so users can diagnose issues in both processes.
@@ -94,7 +97,8 @@ protected BaseCommand(string name, string description, IFeatures features, ICliU
                     interactionService.DisplayMessage(
                         KnownEmojis.MagnifyingGlassTiltedLeft,
                         string.Format(CultureInfo.CurrentCulture, InteractionServiceStrings.SeeAppHostLogsAt, MarkupHelpers.SafeFileLink(interactionService, executionContext.AppHostCliLogFilePath)),
-                        allowMarkup: true);
+                        allowMarkup: true,
+                        consoleOverride: ConsoleOutput.Error);
                 }
             }
 

src/Aspire.Cli/Interaction/ConsoleInteractionService.cs

@@ -36,10 +36,22 @@ internal class ConsoleInteractionService : IInteractionService
     /// <summary>
     /// Console used for human-readable messages; routes to stderr when <see cref="Console"/> is set to <see cref="ConsoleOutput.Error"/>.
     /// </summary>
-    private IAnsiConsole MessageConsole => Console == ConsoleOutput.Error ? _errorConsole : _outConsole;
+    private IAnsiConsole MessageConsole => GetConsoleOutput(null);
 
     // Limit logging to prompts and messages. Don't log raw text output since it may contain sensitive information.
-    private ILogger MessageLogger => Console == ConsoleOutput.Error ? _stderrLogger : _stdoutLogger;
+    private ILogger MessageLogger => GetLogger(null);
+
+    private IAnsiConsole GetConsoleOutput(ConsoleOutput? consoleOverride) => (consoleOverride ?? Console) switch
+    {
+        ConsoleOutput.Error => _errorConsole,
+        _ => _outConsole
+    };
+
+    private ILogger GetLogger(ConsoleOutput? consoleOverride) => (consoleOverride ?? Console) switch
+    {
+        ConsoleOutput.Error => _stderrLogger,
+        _ => _stdoutLogger
+    };
 
     public ConsoleOutput Console { get; set; }
 
@@ -373,8 +385,10 @@ public void DisplayError(string errorMessage, bool allowMarkup = false)
         WriteEmojiMessage(_errorConsole, _stderrLogger, KnownEmojis.CrossMark, $"[red bold]{formatted}[/]", allowMarkup: true);
     }
 
-    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false)
-        => WriteEmojiMessage(MessageConsole, MessageLogger, emoji, message, allowMarkup);
+    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false, ConsoleOutput? consoleOverride = null)
+    {
+        WriteEmojiMessage(GetConsoleOutput(consoleOverride), GetLogger(consoleOverride), emoji, message, allowMarkup);
+    }
 
     private static void WriteEmojiMessage(IAnsiConsole target, ILogger logger, KnownEmoji emoji, string message, bool allowMarkup)
     {
@@ -533,10 +547,10 @@ await MessageConsole.Live(initialRenderable)
             });
     }
 
-    public void DisplayCancellationMessage()
+    public void DisplayCancellationMessage(ConsoleOutput? consoleOverride = null)
     {
-        MessageConsole.WriteLine();
-        DisplayMessage(KnownEmojis.StopSign, $"[teal bold]{InteractionServiceStrings.StoppingAspire}[/]", allowMarkup: true);
+        GetConsoleOutput(consoleOverride).WriteLine();
+        DisplayMessage(KnownEmojis.StopSign, $"[teal bold]{InteractionServiceStrings.StoppingAspire}[/]", allowMarkup: true, consoleOverride: consoleOverride);
     }
 
     public async Task<bool> PromptConfirmAsync(string promptText, PromptBinding<bool>? binding = null, CancellationToken cancellationToken = default)

src/Aspire.Cli/Interaction/ExtensionInteractionService.cs

@@ -352,12 +352,12 @@ public void DisplayError(string errorMessage, bool allowMarkup = false)
         Debug.Assert(result);
     }
 
-    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false)
+    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false, ConsoleOutput? consoleOverride = null)
     {
         var result = _extensionTaskChannel.Writer.TryWrite(async () =>
         {
             await Backchannel.DisplayMessageAsync(emoji.Name, message.RemoveSpectreFormatting(), _cancellationToken);
-            _consoleInteractionService.DisplayMessage(emoji, message, allowMarkup);
+            _consoleInteractionService.DisplayMessage(emoji, message, allowMarkup, consoleOverride);
         });
         Debug.Assert(result);
     }
@@ -405,11 +405,11 @@ public void DisplayLines(IEnumerable<(OutputLineStream Stream, string Line)> lin
         // here would surface every line twice.
     }
 
-    public void DisplayCancellationMessage()
+    public void DisplayCancellationMessage(ConsoleOutput? consoleOverride = null)
     {
         var result = _extensionTaskChannel.Writer.TryWrite(() => Backchannel.DisplayCancellationMessageAsync(_cancellationToken));
         Debug.Assert(result);
-        _consoleInteractionService.DisplayCancellationMessage();
+        _consoleInteractionService.DisplayCancellationMessage(consoleOverride);
     }
 
     public void DisplayEmptyLine()

src/Aspire.Cli/Interaction/IInteractionService.cs

@@ -19,7 +19,7 @@ internal interface IInteractionService
     Task<IReadOnlyList<T>> PromptForSelectionsAsync<T>(string promptText, IEnumerable<T> choices, Func<T, string> choiceFormatter, IEnumerable<T>? preSelected = null, bool optional = false, PromptBinding<string?>? binding = null, bool echoSelected = true, CancellationToken cancellationToken = default) where T : notnull;
     int DisplayIncompatibleVersionError(AppHostIncompatibleException ex, string appHostHostingVersion);
     void DisplayError(string errorMessage, bool allowMarkup = false);
-    void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false);
+    void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false, ConsoleOutput? consoleOverride = null);
     void DisplayPlainText(string text);
     void DisplayRawText(string text, ConsoleOutput? consoleOverride = null);
     void DisplayMarkdown(string markdown, ConsoleOutput? consoleOverride = null, int? maxWidth = null);
@@ -29,7 +29,7 @@ internal interface IInteractionService
     void DisplayLines(IEnumerable<(OutputLineStream Stream, string Line)> lines);
     void DisplayRenderable(IRenderable renderable);
     Task DisplayLiveAsync(IRenderable initialRenderable, Func<Action<IRenderable>, Task> callback);
-    void DisplayCancellationMessage();
+    void DisplayCancellationMessage(ConsoleOutput? consoleOverride = null);
     void DisplayEmptyLine();
 
     /// <summary>

tests/Aspire.Cli.Tests/Commands/PublishCommandPromptingIntegrationTests.cs

@@ -950,11 +950,11 @@ public Task<bool> PromptConfirmAsync(string promptText, PromptBinding<bool>? bin
     public void ShowStatus(string statusText, Action action, KnownEmoji? emoji = null, bool allowMarkup = false) => action();
     public int DisplayIncompatibleVersionError(AppHostIncompatibleException ex, string appHostHostingVersion) => 0;
     public void DisplayError(string errorMessage, bool allowMarkup = false) => DisplayedErrors.Add(errorMessage);
-    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false) { }
+    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false, ConsoleOutput? consoleOverride = null) { }
     public void DisplaySuccess(string message, bool allowMarkup = false) { }
     public void DisplaySubtleMessage(string message, bool allowMarkup = false) { }
     public void DisplayLines(IEnumerable<(OutputLineStream Stream, string Line)> lines) { }
-    public void DisplayCancellationMessage() { }
+    public void DisplayCancellationMessage(ConsoleOutput? consoleOverride = null) { }
     public void DisplayEmptyLine() { }
     public void DisplayPlainText(string text) { }
     public void DisplayRawText(string text, ConsoleOutput? consoleOverride = null) { }

tests/Aspire.Cli.Tests/Commands/UpdateCommandTests.cs

@@ -2364,18 +2364,18 @@ public Task<IReadOnlyList<T>> PromptForSelectionsAsync<T>(string promptText, IEn
     public int DisplayIncompatibleVersionError(AppHostIncompatibleException ex, string appHostHostingVersion) 
         => _innerService.DisplayIncompatibleVersionError(ex, appHostHostingVersion);
     public void DisplayError(string errorMessage, bool allowMarkup = false) => _innerService.DisplayError(errorMessage, allowMarkup);
-    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false) => _innerService.DisplayMessage(emoji, message, allowMarkup);
+    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false, ConsoleOutput? consoleOverride = null) => _innerService.DisplayMessage(emoji, message, allowMarkup, consoleOverride);
     public void DisplayPlainText(string text) => _innerService.DisplayPlainText(text);
     public void DisplayRawText(string text, ConsoleOutput? consoleOverride = null) => _innerService.DisplayRawText(text, consoleOverride);
     public void DisplayMarkdown(string markdown, ConsoleOutput? consoleOverride = null, int? maxWidth = null) => _innerService.DisplayMarkdown(markdown, consoleOverride, maxWidth);
     public void DisplayMarkupLine(string markup) => _innerService.DisplayMarkupLine(markup);
     public void DisplaySuccess(string message, bool allowMarkup = false) => _innerService.DisplaySuccess(message, allowMarkup);
     public void DisplaySubtleMessage(string message, bool allowMarkup = false) => _innerService.DisplaySubtleMessage(message, allowMarkup);
     public void DisplayLines(IEnumerable<(OutputLineStream Stream, string Line)> lines) => _innerService.DisplayLines(lines);
-    public void DisplayCancellationMessage() 
+    public void DisplayCancellationMessage(ConsoleOutput? consoleOverride = null) 
     {
         OnCancellationMessageDisplayed?.Invoke();
-        _innerService.DisplayCancellationMessage();
+        _innerService.DisplayCancellationMessage(consoleOverride);
     }
     public void DisplayEmptyLine() => _innerService.DisplayEmptyLine();
     public void DisplayVersionUpdateNotification(string newerVersion, string? updateCommand = null) 

tests/Aspire.Cli.Tests/Projects/ExtensionGuestLauncherTests.cs

@@ -165,10 +165,10 @@ public Task LaunchAppHostAsync(string projectFile, List<string> arguments, List<
         public Task<IReadOnlyList<T>> PromptForSelectionsAsync<T>(string promptText, IEnumerable<T> choices, Func<T, string> choiceFormatter, IEnumerable<T>? preSelected = null, bool optional = false, PromptBinding<string?>? binding = null, bool echoSelected = true, CancellationToken cancellationToken = default) where T : notnull => throw new NotImplementedException();
         public int DisplayIncompatibleVersionError(AppHostIncompatibleException ex, string appHostHostingVersion) => throw new NotImplementedException();
         public void DisplayError(string errorMessage, bool allowMarkup = false) => throw new NotImplementedException();
-        public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false) => throw new NotImplementedException();
+        public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false, ConsoleOutput? consoleOverride = null) => throw new NotImplementedException();
         public void DisplaySuccess(string message, bool allowMarkup = false) => throw new NotImplementedException();
         public void DisplayLines(IEnumerable<(OutputLineStream Stream, string Line)> lines) => throw new NotImplementedException();
-        public void DisplayCancellationMessage() => throw new NotImplementedException();
+        public void DisplayCancellationMessage(ConsoleOutput? consoleOverride = null) => throw new NotImplementedException();
         public Task<bool> PromptConfirmAsync(string promptText, PromptBinding<bool>? binding = null, CancellationToken cancellationToken = default) => throw new NotImplementedException();
         public void DisplaySubtleMessage(string message, bool allowMarkup = false) => throw new NotImplementedException();
         public void DisplayEmptyLine() => throw new NotImplementedException();

tests/Aspire.Cli.Tests/Templating/DotNetTemplateFactoryTests.cs

@@ -397,9 +397,9 @@ public void ShowStatus(string message, Action work, KnownEmoji? emoji = null, bo
 
         public void DisplaySuccess(string message, bool allowMarkup = false) { }
         public void DisplayError(string message, bool allowMarkup = false) { }
-        public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false) { }
+        public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false, ConsoleOutput? consoleOverride = null) { }
         public void DisplayLines(IEnumerable<(OutputLineStream Stream, string Line)> lines) { }
-        public void DisplayCancellationMessage() { }
+        public void DisplayCancellationMessage(ConsoleOutput? consoleOverride = null) { }
         public int DisplayIncompatibleVersionError(AppHostIncompatibleException ex, string appHostHostingVersion) => 0;
         public void DisplayPlainText(string text) { }
         public void DisplayRawText(string text, ConsoleOutput? consoleOverride = null) { }

tests/Aspire.Cli.Tests/TestServices/TestExtensionInteractionService.cs

@@ -81,7 +81,7 @@ public void DisplayError(string errorMessage, bool allowMarkup = false)
         DisplayErrorCallback?.Invoke(errorMessage);
     }
 
-    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false)
+    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false, ConsoleOutput? consoleOverride = null)
     {
     }
 
@@ -118,7 +118,7 @@ public void DisplayLines(IEnumerable<(OutputLineStream Stream, string Line)> lin
     {
     }
 
-    public void DisplayCancellationMessage()
+    public void DisplayCancellationMessage(ConsoleOutput? consoleOverride = null)
     {
     }
 

tests/Aspire.Cli.Tests/TestServices/TestInteractionService.cs

@@ -199,7 +199,7 @@ public void DisplayError(string errorMessage, bool allowMarkup = false)
         }
     }
 
-    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false)
+    public void DisplayMessage(KnownEmoji emoji, string message, bool allowMarkup = false, ConsoleOutput? consoleOverride = null)
     {
         lock (_displayLock)
         {
@@ -223,7 +223,7 @@ public void DisplayLines(IEnumerable<(OutputLineStream Stream, string Line)> lin
         }
     }
 
-    public void DisplayCancellationMessage()
+    public void DisplayCancellationMessage(ConsoleOutput? consoleOverride = null)
     {
         DisplayCancellationMessageCount++;
     }