Fix dotnet watch.

playground/CosmosEndToEnd/CosmosEndToEnd.AppHost/Properties/launchSettings.json

@@ -10,19 +10,19 @@
         "ASPNETCORE_ENVIRONMENT": "Development",
         "DOTNET_ENVIRONMENT": "Development",
         "DOTNET_DASHBOARD_OTLP_ENDPOINT_URL": "http://localhost:16175",
-        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true" // Display dashboard resource in console for local development
-      }
-    },
-    "generate-manifest": {
-      "commandName": "Project",
-      "launchBrowser": true,
-      "dotnetRunMessages": true,
-      "commandLineArgs": "--publisher manifest --output-path aspire-manifest.json",
-      "applicationUrl": "http://localhost:15888",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development",
-        "DOTNET_ENVIRONMENT": "Development",
-        "DOTNET_DASHBOARD_OTLP_ENDPOINT_URL": "http://localhost:16175"
+        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true"
+      },
+      "generate-manifest": {
+        "commandName": "Project",
+        "launchBrowser": true,
+        "dotnetRunMessages": true,
+        "commandLineArgs": "--publisher manifest --output-path aspire-manifest.json",
+        "applicationUrl": "http://localhost:15888",
+        "environmentVariables": {
+          "ASPNETCORE_ENVIRONMENT": "Development",
+          "DOTNET_ENVIRONMENT": "Development",
+          "DOTNET_DASHBOARD_OTLP_ENDPOINT_URL": "http://localhost:16175"
+        }
       }
     }
   }

playground/SqlServerEndToEnd/SqlServerEndToEnd.AppHost/Program.cs

@@ -13,6 +13,6 @@
 // to test end developer dashboard launch experience. Refer to Directory.Build.props
 // for the path to the dashboard binary (defaults to the Aspire.Dashboard bin output
 // in the artifacts dir).
-//builder.AddProject<Projects.Aspire_Dashboard>(KnownResourceNames.AspireDashboard);
+builder.AddProject<Projects.Aspire_Dashboard>(KnownResourceNames.AspireDashboard);
 
 builder.Build().Run();

playground/SqlServerEndToEnd/SqlServerEndToEnd.AppHost/Properties/launchSettings.json

@@ -10,7 +10,7 @@
         "ASPNETCORE_ENVIRONMENT": "Development",
         "DOTNET_ENVIRONMENT": "Development",
         "DOTNET_DASHBOARD_OTLP_ENDPOINT_URL": "http://localhost:16175",
-        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true" // Display dashboard resource in console for local development
+        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true"
       }
     },
     "generate-manifest": {

playground/dapr/AppHost/Properties/launchSettings.json

@@ -9,7 +9,7 @@
         "ASPNETCORE_ENVIRONMENT": "Development",
         "DOTNET_ENVIRONMENT": "Development",
         "DOTNET_DASHBOARD_OTLP_ENDPOINT_URL": "http://localhost:16031",
-        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true" // Display dashboard resource in console for local development
+        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true"
       }
     },
     "generate-manifest": {

playground/eShopLite/AppHost/Properties/launchSettings.json

@@ -9,7 +9,7 @@
         "ASPNETCORE_ENVIRONMENT": "Development",
         "DOTNET_ENVIRONMENT": "Development",
         "DOTNET_DASHBOARD_OTLP_ENDPOINT_URL": "http://localhost:16031",
-        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true" // Display dashboard resource in console for local development
+        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true"
       }
     },
     "generate-manifest": {

playground/eShopLite/AppHost/appsettings.json

@@ -2,7 +2,8 @@
   "Logging": {
     "LogLevel": {
       "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
+      "Microsoft.AspNetCore": "Warning",
+      "Aspire.Hosting.Dcp": "Warning"
     }
   }
 }

playground/mongo/Mongo.AppHost/Properties/launchSettings.json

@@ -10,7 +10,7 @@
         "ASPNETCORE_ENVIRONMENT": "Development",
         "DOTNET_ENVIRONMENT": "Development",
         "DOTNET_DASHBOARD_OTLP_ENDPOINT_URL": "http://localhost:16175",
-        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true" // Display dashboard resource in console for local development
+        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true"
       }
     },
     "generate-manifest": {

playground/orleans/OrleansAppHost/Properties/launchSettings.json

@@ -9,7 +9,7 @@
         "ASPNETCORE_ENVIRONMENT": "Development",
         "DOTNET_ENVIRONMENT": "Development",
         "DOTNET_DASHBOARD_OTLP_ENDPOINT_URL": "http://localhost:16031",
-        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true" // Display dashboard resource in console for local development
+        "DOTNET_ASPIRE_SHOW_DASHBOARD_RESOURCES": "true"
       }
     },
     "generate-manifest": {

src/Aspire.Hosting/Dashboard/DashboardManifestExclusionHook.cs

@@ -0,0 +1,19 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Aspire.Hosting.ApplicationModel;
+using Aspire.Hosting.Lifecycle;
+
+namespace Aspire.Hosting.Dashboard;
+internal sealed class DashboardManifestExclusionHook : IDistributedApplicationLifecycleHook
+{
+    public Task BeforeStartAsync(DistributedApplicationModel model, CancellationToken cancellationToken)
+    {
+        if (model.Resources.SingleOrDefault(r => StringComparers.ResourceName.Equals(r.Name, KnownResourceNames.AspireDashboard)) is { } dashboardResource)
+        {
+            dashboardResource.Annotations.Add(ManifestPublishingCallbackAnnotation.Ignore);
+        }
+
+        return Task.CompletedTask;
+    }
+}

src/Aspire.Hosting/Dcp/ApplicationExecutor.cs

@@ -1,12 +1,12 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-using System.Diagnostics.CodeAnalysis;
 using System.Net.Sockets;
 using Aspire.Hosting.ApplicationModel;
 using Aspire.Hosting.Dashboard;
 using Aspire.Hosting.Dcp.Model;
 using Aspire.Hosting.Lifecycle;
+using Aspire.Hosting.Utils;
 using k8s;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
@@ -50,6 +50,7 @@ public ServiceAppResource(IResource modelResource, Service service, EndpointAnno
 }
 
 internal sealed class ApplicationExecutor(ILogger<ApplicationExecutor> logger,
+                                          ILoggerFactory loggerFactory,
                                           DistributedApplicationModel model,
                                           DistributedApplicationOptions distributedApplicationOptions,
                                           KubernetesService kubernetesService,
@@ -138,12 +139,12 @@ private async Task ConfigureAspireDashboardResource(IResource dashboardResource,
         {
             if (Environment.GetEnvironmentVariable("ASPNETCORE_URLS") is not { } appHostApplicationUrl)
             {
-                throw new DistributedApplicationException("Dashboard inner loop hook failed to configure resource because ASPNETCORE_URLS environment variable was not set.");
+                throw new DistributedApplicationException("Failed to configure dashboard resource because ASPNETCORE_URLS environment variable was not set.");
             }
 
             if (Environment.GetEnvironmentVariable("DOTNET_DASHBOARD_OTLP_ENDPOINT_URL") is not { } otlpEndpointUrl)
             {
-                throw new DistributedApplicationException("Dashboard inner loop hook failed to configure resource because DOTNET_DASHBOARD_OTLP_ENDPOINT_URL environment variable was not set.");
+                throw new DistributedApplicationException("Failed to configure dashboard resource because DOTNET_DASHBOARD_OTLP_ENDPOINT_URL environment variable was not set.");
             }
 
             // Grab the resource service URL. We need to inject this into the resource.
@@ -254,9 +255,12 @@ private static TimeSpan DashboardAvailabilityTimeoutDuration
 
     private async Task CheckDashboardAvailabilityAsync(string delimitedUrlList, CancellationToken cancellationToken)
     {
-        if (TryGetUriFromDelimitedString(delimitedUrlList, ";", out var firstDashboardUrl))
+        if (StringUtils.TryGetUriFromDelimitedString(delimitedUrlList, ";", out var firstDashboardUrl))
         {
             await WaitForHttpSuccessOrThrow(firstDashboardUrl, DashboardAvailabilityTimeoutDuration, cancellationToken).ConfigureAwait(false);
+
+            var distributedApplicationLogger = loggerFactory.CreateLogger<DistributedApplication>();
+            distributedApplicationLogger.LogInformation("Now listening on: {DashboardUrl}", firstDashboardUrl.ToString().TrimEnd('/'));
         }
         else
         {
@@ -669,21 +673,6 @@ private async Task CreateExecutablesAsync(IEnumerable<AppResource> executableRes
         }
     }
 
-    private static bool TryGetUriFromDelimitedString(string input, string delimiter, [NotNullWhen(true)]out Uri? uri)
-    {
-        if (!string.IsNullOrEmpty(input)
-            && input.Split(delimiter) is { Length: > 0} splitInput
-            && Uri.TryCreate(splitInput[0], UriKind.Absolute, out uri))
-        {
-            return true;
-        }
-        else
-        {
-            uri = null;
-            return false;
-        }
-    }
-
     private static void ApplyLaunchProfile(AppResource executableResource, Dictionary<string, string> config, string launchProfileName, LaunchSettings launchSettings)
     {
         // Populate DOTNET_LAUNCH_PROFILE environment variable for consistency with "dotnet run" and "dotnet watch".

src/Aspire.Hosting/DistributedApplication.cs

@@ -5,9 +5,9 @@
 using Aspire.Hosting.ApplicationModel;
 using Aspire.Hosting.Lifecycle;
 using Aspire.Hosting.Publishing;
-using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 
 namespace Aspire.Hosting;
@@ -46,6 +46,7 @@ public class DistributedApplication : IHost, IAsyncDisposable
 {
     private readonly IHost _host;
     private readonly string[] _args;
+    private readonly ILogger<DistributedApplication> _logger;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="DistributedApplication"/> class.
@@ -55,6 +56,7 @@ public class DistributedApplication : IHost, IAsyncDisposable
     public DistributedApplication(IHost host, string[] args)
     {
         _host = host;
+        _logger = host.Services.GetRequiredService<ILogger<DistributedApplication>>();
         _args = args;
     }
 
@@ -111,8 +113,9 @@ public ValueTask DisposeAsync()
     /// <inheritdoc cref="IHost.StartAsync" />
     public async Task StartAsync(CancellationToken cancellationToken = default)
     {
-        await ExecuteBeforeStartHooksAsync(cancellationToken).ConfigureAwait(false);
+        WriteStartingLog();
         await _host.StartAsync(cancellationToken).ConfigureAwait(false);
+        await ExecuteBeforeStartHooksAsync(cancellationToken).ConfigureAwait(false);
     }
 
     /// <inheritdoc cref="IHost.StopAsync" />
@@ -121,30 +124,25 @@ public async Task StopAsync(CancellationToken cancellationToken = default)
         await _host.StopAsync(cancellationToken).ConfigureAwait(false);
     }
 
-    private void SuppressLifetimeLogsDuringManifestPublishing()
+    /// <inheritdoc cref="HostingAbstractionsHostExtensions.RunAsync" />
+    public async Task RunAsync(CancellationToken cancellationToken = default)
+    {
+        WriteStartingLog();
+        await ExecuteBeforeStartHooksAsync(cancellationToken).ConfigureAwait(false);
+        await _host.RunAsync(cancellationToken).ConfigureAwait(false);
+    }
+
+    private void WriteStartingLog()
     {
-        var config = (IConfigurationRoot)_host.Services.GetRequiredService<IConfiguration>();
         var options = _host.Services.GetRequiredService<IOptions<PublishingOptions>>();
 
-        if (options.Value?.Publisher != "manifest")
+        if (options.Value?.Publisher == "manifest")
         {
-            // If we aren't doing manifest publishing we want the logs
-            // to be produced as normal.
+            // If we are producing the manifest, don't write startup messages.
             return;
         }
 
-        var hostingLifetimeLoggingLevelSection = config.GetSection("Logging:LogLevel:Microsoft.Hosting.Lifetime");
-        hostingLifetimeLoggingLevelSection.Value = "Warning";
-
-        config.Reload();
-    }
-
-    /// <inheritdoc cref="HostingAbstractionsHostExtensions.RunAsync" />
-    public async Task RunAsync(CancellationToken cancellationToken = default)
-    {
-        SuppressLifetimeLogsDuringManifestPublishing();
-        await ExecuteBeforeStartHooksAsync(cancellationToken).ConfigureAwait(false);
-        await _host.RunAsync(cancellationToken).ConfigureAwait(false);
+        _logger.LogInformation("Distributed application starting.");
     }
 
     /// <summary>

src/Aspire.Hosting/DistributedApplicationBuilder.cs

@@ -9,6 +9,7 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
 
 namespace Aspire.Hosting;
 
@@ -44,6 +45,9 @@ public DistributedApplicationBuilder(DistributedApplicationOptions options)
         _args = options.Args ?? [];
         _innerBuilder = new HostApplicationBuilder();
 
+        _innerBuilder.Logging.AddFilter("Microsoft.Hosting.Lifetime", LogLevel.Warning);
+        _innerBuilder.Logging.AddFilter("Microsoft.AspNetCore.Server.Kestrel", LogLevel.None);
+
         AppHostDirectory = options.ProjectDirectory ?? _innerBuilder.Environment.ContentRootPath;
 
         // Make the app host directory available to the application via configuration
@@ -61,6 +65,7 @@ public DistributedApplicationBuilder(DistributedApplicationOptions options)
         // Dashboard
         _innerBuilder.Services.AddSingleton<DashboardServiceHost>();
         _innerBuilder.Services.AddHostedService<DashboardServiceHost>(sp => sp.GetRequiredService<DashboardServiceHost>());
+        _innerBuilder.Services.AddLifecycleHook<DashboardManifestExclusionHook>();
 
         // DCP stuff
         _innerBuilder.Services.AddLifecycleHook<DcpDistributedApplicationLifecycleHook>();

src/Aspire.Hosting/Utils/StringUtils.cs

@@ -0,0 +1,25 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+namespace Aspire.Hosting.Utils;
+
+internal static class StringUtils
+{
+    public static bool TryGetUriFromDelimitedString(string input, string delimiter, [NotNullWhen(true)] out Uri? uri)
+    {
+        if (!string.IsNullOrEmpty(input)
+            && input.Split(delimiter) is { Length: > 0 } splitInput
+            && Uri.TryCreate(splitInput[0], UriKind.Absolute, out uri))
+        {
+            return true;
+        }
+        else
+        {
+            uri = null;
+            return false;
+        }
+    }
+
+}

tests/Aspire.Hosting.Tests/DistributedApplicationBuilderTests.cs

@@ -26,7 +26,7 @@ public void BuilderAddsDefaultServices()
 
         var lifecycles = app.Services.GetServices<IDistributedApplicationLifecycleHook>();
         Assert.Single(lifecycles.Where(h => h.GetType().Name == "DcpDistributedApplicationLifecycleHook"));
-        Assert.Equal(3, lifecycles.Count());
+        Assert.Equal(4, lifecycles.Count());
 
         var options = app.Services.GetRequiredService<IOptions<PublishingOptions>>();
         Assert.Null(options.Value.Publisher);