New dotnet watch support for aspire

Directory.Build.props

@@ -56,6 +56,7 @@
     <!-- TODO: Need to figure out we can automatically detect target framework here. This property
                is specified to support dashboard path metadata generation on the inner loop. -->
     <AspireDashboardDir>$(MSBuildThisFileDirectory)/artifacts/bin/Aspire.Dashboard/$(Configuration)/net8.0/</AspireDashboardDir>
+    <WatchAspireDir>$(MSBuildThisFileDirectory)/artifacts/bin/Microsoft.DotNet.HotReload.Watch.Aspire/$(Configuration)/net10.0/</WatchAspireDir>
   </PropertyGroup>
 
 </Project>

NuGet.config

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <clear />
@@ -31,6 +31,7 @@
       <!-- FluentUI is present on both public an internal dotnet feeds. Prefer public feed -->
       <package pattern="Microsoft.FluentUI.AspNetCore.Components" />
       <package pattern="Microsoft.FluentUI.AspNetCore.Components.Icons" />
+      <package pattern="Microsoft.CodeAnalysis.*" />
     </packageSource>
     <packageSource key="dotnet9">
       <package pattern="*" />
@@ -39,7 +40,7 @@
       <package pattern="*" />
     </packageSource>
     <packageSource key="dotnet-tools">
-      <package pattern="*" />
+      <package pattern="Microsoft.CodeAnalysis.*" />
     </packageSource>
     <packageSource key="dotnet-libraries">
       <package pattern="Microsoft.DeveloperControlPlane*" />

playground/mongo/Mongo.ApiService/Program.cs

@@ -13,6 +13,8 @@
 var app = builder.Build();
 
 app.MapDefaultEndpoints();
+app.MapGet("/ping", () => "pong");
+app.MapGet("/health-check", () => "healthy");
 app.MapGet("/", async (IMongoClient mongoClient) =>
 {
     const string collectionName = "entries";

src/Aspire.Hosting.AppHost/build/Aspire.Hosting.AppHost.in.targets

@@ -230,6 +230,22 @@ namespace Projects%3B
     </ItemGroup>
   </Target>
 
+  <Target Name="SetWatchAspireDiscoveryAttributes" BeforeTargets="GetAssemblyAttributes" Condition=" '$(WatchAspireDir)' != '' ">
+    <PropertyGroup>
+      <WatchAspireDir>$([MSBuild]::EnsureTrailingSlash('$(WatchAspireDir)'))</WatchAspireDir>
+      <WatchAspirePath Condition=" '$(WatchAspirePath)' == '' ">$([MSBuild]::NormalizePath($(WatchAspireDir), 'Microsoft.DotNet.HotReload.Watch.Aspire'))</WatchAspirePath>
+      <WatchAspirePath Condition=" '$(OS)' == 'Windows_NT' and !$(WatchAspirePath.EndsWith('.exe')) ">$(WatchAspirePath).exe</WatchAspirePath>
+      <WatchAspirePath Condition=" '$(OS)' != 'Windows_NT' and !$(WatchAspirePath.EndsWith('.dll')) ">$(WatchAspirePath).dll</WatchAspirePath>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <AssemblyAttribute Include="System.Reflection.AssemblyMetadata">
+        <_Parameter1>watchaspirepath</_Parameter1>
+        <_Parameter2>$(WatchAspirePath)</_Parameter2>
+      </AssemblyAttribute>
+    </ItemGroup>
+  </Target>
+
   <Target Name="EmbedAppHostIntermediateOutputPath" BeforeTargets="GetAssemblyAttributes" Condition=" '$(IsAspireHost)' == 'true' ">
     <ItemGroup>
       <AssemblyAttribute Include="System.Reflection.AssemblyMetadataAttribute">