Fix: Add conditional checks to prevent generating empty files

Author: AnnaSasDev

src/CodeOfChaos.Extensions.DependencyInjection.Generators/ServiceRegistrationGenerator.cs

@@ -76,23 +76,27 @@ private static void GenerateSources(SourceProductionContext context, (Compilatio
             .TrimEnd('-', '_');
 
 
-        context.AddSource(
-            PooledServicesFileName,
-            SourceText.From(GeneratePooledServicesFile(
-                context,
-                assemblyNameSanitized,
-                registrations
-            ), Encoding.UTF8)
-        );
-
-        context.AddSource(
-            ServiceRegistrationFileName,
-            SourceText.From(GenerateServiceRegistrationFile(
-                context,
-                assemblyNameSanitized,
-                registrations
-            ), Encoding.UTF8)
-        );
+        if (registrations.Length != 0) {
+            context.AddSource(
+                PooledServicesFileName,
+                SourceText.From(GeneratePooledServicesFile(
+                    context,
+                    assemblyNameSanitized,
+                    registrations
+                ), Encoding.UTF8)
+            );
+        }
+
+        if (registrations.Length != 0) {
+            context.AddSource(
+                ServiceRegistrationFileName,
+                SourceText.From(GenerateServiceRegistrationFile(
+                    context,
+                    assemblyNameSanitized,
+                    registrations
+                ), Encoding.UTF8)
+            );
+        }
     }
 
     private static List<IServiceRegistration> GetRegistrations(SourceProductionContext context, Compilation compilation, ImmutableArray<ClassDeclarationSyntax> classDeclarations) {