Only gen serializer if serializers are specifid

angel_serialize/lib/angel_serialize.dart

@@ -28,6 +28,9 @@ const Serializable serializable = const Serializable();
 
 /// The supported serialization types.
 abstract class Serializers {
+  /// All supported serialization types.
+  static const List<int> all = const [map, json];
+
   /// Enable `fromMap` and `toMap` methods on the model class.
   static const int map = 0;
 

angel_serialize_generator/lib/angel_serialize_generator.dart

@@ -10,6 +10,7 @@ import 'package:source_gen/source_gen.dart' hide LibraryBuilder;
 import 'build_context.dart';
 import 'context.dart';
 part 'model.dart';
+part 'serialize.dart';
 
 /// Converts a [DartType] to a [TypeReference].
 TypeReference convertTypeReference(DartType t) {

angel_serialize_generator/lib/serialize.dart

@@ -0,0 +1,42 @@
+part of angel_serialize_generator;
+
+class SerializerGenerator extends GeneratorForAnnotation<Serializable> {
+  final bool autoSnakeCaseNames;
+
+  const SerializerGenerator({this.autoSnakeCaseNames: true});
+
+  @override
+  Future<String> generateForAnnotatedElement(
+      Element element, ConstantReader annotation, BuildStep buildStep) async {
+    if (element.kind != ElementKind.CLASS)
+      throw 'Only classes can be annotated with a @Serializable() annotation.';
+
+    var ctx = await buildContext(element, annotation, buildStep,
+        await buildStep.resolver, true, autoSnakeCaseNames != false);
+
+    var serializers = annotation.peek('serializers')?.listValue ?? [];
+
+    if (serializers.isEmpty) return null;
+
+    // Check if any serializer is recognized
+    if (!serializers.any((s) => Serializers.all.contains(s.toIntValue()))) {
+      return null;
+    }
+
+    var lib = new File((b) {
+      generateClass(ctx, b);
+    });
+
+    var buf = lib.accept(new DartEmitter());
+    return buf.toString();
+  }
+
+  /// Generate a serializer class.
+  void generateClass(BuildContext ctx, FileBuilder file) {
+    file.body.add(new Class((clazz) {
+      clazz
+        ..name = '${ctx.modelClassNameRecase.pascalCase}Serializer'
+        ..abstract = true;
+    }));
+  }
+}

angel_serialize_generator/test/models/author.serializer.g.dart

@@ -0,0 +1,11 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of angel_serialize.test.models.author;
+
+// **************************************************************************
+// Generator: SerializerGenerator
+// **************************************************************************
+
+abstract class AuthorSerializer {}
+
+abstract class LibrarySerializer {}

angel_serialize_generator/test/models/book.serializer.g.dart

@@ -0,0 +1,9 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of angel_serialize.test.models.book;
+
+// **************************************************************************
+// Generator: SerializerGenerator
+// **************************************************************************
+
+class BookSerializer extends _Book {}

angel_serialize_generator/tool/actions.dart

@@ -3,18 +3,27 @@ import 'package:source_gen/source_gen.dart';
 import 'package:angel_serialize_generator/angel_serialize_generator.dart';
 
 final List<BuildAction> actions = [
-  new BuildAction(
+  jsonModel(const ['test/models/book.dart']),
-    new PartBuilder([const JsonModelGenerator()]),
+  jsonModel(const ['test/models/author.dart']),
-    'angel_serialize_generator',
+  angelSerialize(const ['test/models/book.dart']),
-    inputs: const [
+  angelSerialize(const ['test/models/author.dart']),
-      'test/models/book.dart',
-    ],
-  ),
-  new BuildAction(
-    new PartBuilder([const JsonModelGenerator()]),
-    'angel_serialize_generator',
-    inputs: const [
-      'test/models/author.dart',
-    ],
-  ),
 ];
+
+BuildAction jsonModel(List<String> inputs) {
+  return new BuildAction(
+    new PartBuilder([const JsonModelGenerator()]),
+    'angel_serialize_generator',
+    inputs: inputs,
+  );
+}
+
+BuildAction angelSerialize(List<String> inputs) {
+  return new BuildAction(
+    new PartBuilder(
+      [const SerializerGenerator()],
+      generatedExtension: '.serializer.g.dart',
+    ),
+    'angel_serialize_generator',
+    inputs: inputs,
+  );
+}