[dotnet-linker] Don't do anything in ManagedRegistrarStep unless the current registrar mode is 'ManagedStatic'.

tools/dotnet-linker/Steps/ConfigurationAwareStep.cs

@@ -5,6 +5,7 @@ using System.Linq;
 
 using Mono.Cecil;
 using Mono.Linker.Steps;
+using Xamarin.Tuner;
 
 using Xamarin.Bundler;
 
@@ -16,6 +17,14 @@ namespace Xamarin.Linker {
 			get { return LinkerConfiguration.GetInstance (Context); }
 		}
 
+		public DerivedLinkContext DerivedLinkContext {
+			get { return Configuration.DerivedLinkContext; }
+		}
+
+		public Application App {
+			get { return DerivedLinkContext.App; }
+		}
+
 		protected void Report (params Exception [] exceptions)
 		{
 			Report ((IList<Exception>) exceptions);

tools/dotnet-linker/Steps/ManagedRegistrarLookupTablesStep.cs

@@ -11,6 +11,9 @@ namespace Xamarin.Linker {
 		protected override void TryProcessAssembly (AssemblyDefinition assembly)
 		{
 			base.TryProcessAssembly (assembly);
+
+			if (App.Registrar != RegistrarMode.ManagedStatic)
+				return;
 		}
 	}
 }

tools/dotnet-linker/Steps/ManagedRegistrarStep.cs

@@ -23,10 +23,24 @@ namespace Xamarin.Linker {
 			exceptions.Add (exception);
 		}
 
+		protected override void TryProcess ()
+		{
+			base.TryProcess ();
+
+			App.SelectRegistrar ();
+			if (App.Registrar != RegistrarMode.ManagedStatic)
+				return;
+		}
+
 		protected override void TryEndProcess (out List<Exception>? exceptions)
 		{
 			base.TryEndProcess ();
 
+			if (App.Registrar != RegistrarMode.ManagedStatic) {
+				exceptions = null;
+				return;
+			}
+
 			// Report back any exceptions that occurred during the processing.
 			exceptions = this.exceptions;
 		}
@@ -34,6 +48,9 @@ namespace Xamarin.Linker {
 		protected override void TryProcessAssembly (AssemblyDefinition assembly)
 		{
 			base.TryProcessAssembly (assembly);
+
+			if (App.Registrar != RegistrarMode.ManagedStatic)
+				return;
 		}
 	}
 }