Add support for HostApplicationBuilder in AmbientMetadata extension

src/Libraries/Microsoft.Extensions.AmbientMetadata.Application/ApplicationMetadataHostBuilderExtensions.cs

@@ -32,4 +32,25 @@ public static IHostBuilder UseApplicationMetadata(this IHostBuilder builder, str
             .ConfigureAppConfiguration((hostBuilderContext, configurationBuilder) => configurationBuilder.AddApplicationMetadata(hostBuilderContext.HostingEnvironment, sectionName))
             .ConfigureServices((hostBuilderContext, serviceCollection) => serviceCollection.AddApplicationMetadata(hostBuilderContext.Configuration.GetSection(sectionName)));
     }
+
+    /// <summary>
+    /// Registers a configuration provider for application metadata and binds a model object onto the configuration.
+    /// </summary>
+    /// <typeparam name="TBuilder"><see cref="IHostApplicationBuilder"/>.</typeparam>
+    /// <param name="builder">The host builder.</param>
+    /// <param name="sectionName">Section name to bind configuration from. Default set to "ambientmetadata:application".</param>
+    /// <returns>The value of <paramref name="builder"/>.</returns>
+    /// <exception cref="ArgumentNullException"><paramref name="builder"/> is <see langword="null"/>.</exception>
+    /// <exception cref="ArgumentException"><paramref name="sectionName"/> is either <see langword="null"/>, empty, or whitespace.</exception>
+    public static TBuilder UseApplicationMetadata<TBuilder>(this TBuilder builder, string sectionName = DefaultSectionName)
+        where TBuilder : IHostApplicationBuilder
+    {
+        _ = Throw.IfNull(builder);
+        _ = Throw.IfNullOrWhitespace(sectionName);
+
+        _ = builder.Configuration.AddApplicationMetadata(builder.Environment, sectionName);
+        _ = builder.Services.AddApplicationMetadata(builder.Configuration.GetSection(sectionName));
+
+        return builder;
+    }
 }

src/Libraries/Microsoft.Extensions.AmbientMetadata.Application/Microsoft.Extensions.AmbientMetadata.Application.json

@@ -1,5 +1,5 @@
 {
-  "Name": "Microsoft.Extensions.AmbientMetadata.Application, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35",
+  "Name": "Microsoft.Extensions.AmbientMetadata.Application, Version=9.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35",
   "Types": [
     {
       "Type": "class Microsoft.Extensions.AmbientMetadata.ApplicationMetadata",
@@ -46,6 +46,10 @@
         {
           "Member": "static Microsoft.Extensions.Hosting.IHostBuilder Microsoft.Extensions.Hosting.ApplicationMetadataHostBuilderExtensions.UseApplicationMetadata(this Microsoft.Extensions.Hosting.IHostBuilder builder, string sectionName = \"ambientmetadata:application\");",
           "Stage": "Stable"
+        },
+        {
+          "Member": "static TBuilder Microsoft.Extensions.Hosting.ApplicationMetadataHostBuilderExtensions.UseApplicationMetadata<TBuilder>(this TBuilder builder, string sectionName = \"ambientmetadata:application\");",
+          "Stage": "Stable"
         }
       ]
     },

src/Libraries/Microsoft.Extensions.AmbientMetadata.Application/README.md

@@ -26,6 +26,7 @@ The services can be registered using any of the following methods:
 
 ```csharp
 public static IHostBuilder UseApplicationMetadata(this IHostBuilder builder, string sectionName = DefaultSectionName)
+public static TBuilder UseApplicationMetadata<TBuilder>(this TBuilder builder, string sectionName = DefaultSectionName) where TBuilder : IHostApplicationBuilder
 public static IServiceCollection AddApplicationMetadata(this IServiceCollection services, Action<ApplicationMetadata> configure)
 ```
 

test/Libraries/Microsoft.Extensions.AmbientMetadata.Application.Tests/AcceptanceTests.cs

@@ -39,12 +39,28 @@ await RunAsync(
             },
             sectionName);
 
+    [Theory]
+    [InlineData("ambientmetadata:application")]
+    [InlineData(null)]
+    public async Task UseApplicationMetadata_HostApplicationBuilder_CreatesPopulatesAndRegistersOptions(string? sectionName) =>
+        await RunAsync_HostBuilder(
+            (options, hostEnvironment) =>
+            {
+                options.BuildVersion.Should().Be(_metadata.BuildVersion);
+                options.DeploymentRing.Should().Be(_metadata.DeploymentRing);
+                options.ApplicationName.Should().Be(_metadata.ApplicationName);
+                options.EnvironmentName.Should().Be(hostEnvironment.EnvironmentName);
+
+                return Task.CompletedTask;
+            },
+            sectionName);
+
     private static async Task RunAsync(Func<ApplicationMetadata, IHostEnvironment, Task> func, string? sectionName)
     {
         using var host = await FakeHost.CreateBuilder()
 
             // need to set applicationName manually, because
-            // netfx console test runner cannot get assebly name
+            // netfx console test runner cannot get assembly name
             // to be able to set it automatically
             // see https://source.dot.net/#Microsoft.Extensions.Hosting/HostBuilder.cs,240
             .ConfigureHostConfiguration("applicationname", _metadata.ApplicationName)
@@ -60,4 +76,31 @@ await func(host.Services.GetRequiredService<IOptions<ApplicationMetadata>>().Val
                    host.Services.GetRequiredService<IHostEnvironment>());
         await host.StopAsync();
     }
+
+    private static async Task RunAsync_HostBuilder(Func<ApplicationMetadata, IHostEnvironment, Task> func, string? sectionName)
+    {
+        var builder = Host.CreateEmptyApplicationBuilder(new()
+        {
+            ApplicationName = _metadata.ApplicationName
+        });
+
+        // need to set applicationName manually, because
+        // netfx console test runner cannot get assembly name
+        // to be able to set it automatically
+        // see https://source.dot.net/#Microsoft.Extensions.Hosting/HostBuilder.cs,240
+        builder
+            .UseApplicationMetadata(sectionName ?? "ambientmetadata:application")
+            .Services.AddApplicationMetadata(metadata =>
+            {
+                metadata.BuildVersion = _metadata.BuildVersion;
+                metadata.DeploymentRing = _metadata.DeploymentRing;
+            });
+
+        using var host = builder.Build();
+        await host.StartAsync();
+
+        await func(host.Services.GetRequiredService<IOptions<ApplicationMetadata>>().Value,
+                   host.Services.GetRequiredService<IHostEnvironment>());
+        await host.StopAsync();
+    }
 }

test/Libraries/Microsoft.Extensions.AmbientMetadata.Application.Tests/ApplicationMetadataExtensionsTests.cs

@@ -40,10 +40,20 @@ public void ApplicationMetadataExtensions_GivenAnyNullArgument_Throws()
         Assert.Throws<ArgumentNullException>(() => serviceCollection.AddApplicationMetadata((Action<ApplicationMetadata>)null!));
         Assert.Throws<ArgumentNullException>(() => serviceCollection.AddApplicationMetadata((IConfigurationSection)null!));
         Assert.Throws<ArgumentNullException>(() => ((IHostBuilder)null!).UseApplicationMetadata(_fixture.Create<string>()));
+        Assert.Throws<ArgumentNullException>(() => ((IHostApplicationBuilder)null!).UseApplicationMetadata(_fixture.Create<string>()));
         Assert.Throws<ArgumentNullException>(() => new ConfigurationBuilder().AddApplicationMetadata(null!));
         Assert.Throws<ArgumentNullException>(() => ((IConfigurationBuilder)null!).AddApplicationMetadata(null!));
     }
 
+    [Fact]
+    public void ApplicationMetadataExtensions_GivenEmptyAction_DoesNotThrow()
+    {
+        var serviceCollection = new ServiceCollection();
+        var config = new ConfigurationBuilder().Build();
+
+        Assert.Null(Record.Exception(() => serviceCollection.AddApplicationMetadata(_ => { })));
+    }
+
     [Theory]
     [InlineData(null)]
     [InlineData("")]
@@ -66,6 +76,17 @@ public void UseApplicationMetadata_InvalidSectionName_Throws(string? sectionName
         act.Should().Throw<ArgumentException>();
     }
 
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData(" ")]
+    [InlineData("  ")]
+    public void UseApplicationMetadata_HostApplicationBuilder_InvalidSectionName_Throws(string? sectionName)
+    {
+        var act = () => Host.CreateEmptyApplicationBuilder(new()).UseApplicationMetadata(sectionName!);
+        act.Should().Throw<ArgumentException>();
+    }
+
     [Fact]
     public void AddApplicationMetadata_BuildsConfig()
     {