Move to granular opt-in for interceptors preview

Author: captainsafia

src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToUseAnalyzers.cs

@@ -28,7 +28,7 @@ public void It_resolves_requestdelegategenerator_correctly(string testAssetName,
                 });
 
             VerifyRequestDelegateGeneratorIsUsed(asset, isEnabled);
-            VerifyInterceptorsFeatureEnabled(asset, isEnabled);
+            VerifyInterceptorsFeatureEnabled(asset, isEnabled, "Microsoft.AspNetCore.Http.Generated");
         }
 
         [Fact]
@@ -45,7 +45,7 @@ public void It_enables_requestdelegategenerator_and_configbindinggenerator_for_P
 
             VerifyRequestDelegateGeneratorIsUsed(asset, expectEnabled: true);
             VerifyConfigBindingGeneratorIsUsed(asset, expectEnabled: true);
-            VerifyInterceptorsFeatureEnabled(asset, expectEnabled: true);
+            VerifyInterceptorsFeatureEnabled(asset, expectEnabled: true, "Microsoft.AspNetCore.Http.Generated", "Microsoft.Extensions.Configuration.Binder.SourceGeneration");
         }
 
         [Fact]
@@ -62,7 +62,7 @@ public void It_enables_requestdelegategenerator_and_configbindinggenerator_for_P
 
             VerifyRequestDelegateGeneratorIsUsed(asset, expectEnabled: true);
             VerifyConfigBindingGeneratorIsUsed(asset, expectEnabled: true);
-            VerifyInterceptorsFeatureEnabled(asset, expectEnabled: true);
+            VerifyInterceptorsFeatureEnabled(asset, expectEnabled: true, "Microsoft.AspNetCore.Http.Generated", "Microsoft.Extensions.Configuration.Binder.SourceGeneration");
         }
 
         private void VerifyGeneratorIsUsed(TestAsset asset, bool? expectEnabled, string generatorName)
@@ -90,23 +90,28 @@ private void VerifyRequestDelegateGeneratorIsUsed(TestAsset asset, bool? expectE
         private void VerifyConfigBindingGeneratorIsUsed(TestAsset asset, bool? expectEnabled)
             => VerifyGeneratorIsUsed(asset, expectEnabled, "Microsoft.Extensions.Configuration.Binder.SourceGeneration.dll");
 
-        private void VerifyInterceptorsFeatureEnabled(TestAsset asset, bool? expectEnabled)
+        private void VerifyInterceptorsFeatureEnabled(TestAsset asset, bool? expectEnabled, params string[] expectedNamespaces)
         {
             var command = new GetValuesCommand(
                 Log,
                 asset.Path,
                 ToolsetInfo.CurrentTargetFramework,
-                "Features",
+                "InterceptorsPreviewNamespaces",
                 GetValuesCommand.ValueType.Property);
 
             command
                 .WithWorkingDirectory(asset.Path)
                 .Execute()
                 .Should().Pass();
 
-            var features = command.GetValues();
+            var namespaces = command.GetValues();
+            Console.WriteLine(namespaces.Count());
+            foreach (var @namespace in namespaces)
+            {
+                Console.WriteLine(@namespace);
+            }
 
-            Assert.Equal(expectEnabled ?? false, features.Any(feature => feature.Contains("InterceptorsPreview")));
+            Assert.Equal(expectEnabled ?? false, expectedNamespaces.All(expectedNamespace => namespaces.Contains(expectedNamespace)));
         }
 
         [Theory]

src/WebSdk/ProjectSystem/Targets/Microsoft.NET.Sdk.Web.ProjectSystem.targets

@@ -59,9 +59,13 @@ Copyright (c) .NET Foundation. All rights reserved.
     <EnableConfigurationBindingGenerator Condition="'$(EnableConfigurationBindingGenerator)' == ''">true</EnableConfigurationBindingGenerator>
   </PropertyGroup>
 
-  <!-- Enable the interceptors compiler feature by default for projects that use the RequestDelegateGenerator. -->
+  <!-- Set the namespaces emitted by the RequestDelegateGenerator for interception when applicable. -->
   <PropertyGroup Condition="'$(EnableRequestDelegateGenerator)' == 'true'">
-    <Features>$(Features);InterceptorsPreview</Features>
+    <InterceptorsPreviewNamespaces>$(InterceptorsPreviewNamespaces);Microsoft.AspNetCore.Http.Generated</InterceptorsPreviewNamespaces>
+  </PropertyGroup>
+  <!-- Set the namespaces emitted by the ConfigurationBindingGenerator for interception when applicable. -->
+  <PropertyGroup Condition="'$(ConfigurationBindingGenerator)' == 'true'">
+    <InterceptorsPreviewNamespaces>$(InterceptorsPreviewNamespaces);Microsoft.Extensions.Configuration.Binder.SourceGeneration</InterceptorsPreviewNamespaces>
   </PropertyGroup>
 
   <!--