feat: implement instance/provide annotations

cherrypick_annotations/lib/cherrypick_annotations.dart

@@ -16,5 +16,6 @@ library;
 export 'src/module.dart';
 export 'src/bind.dart';
 export 'src/provide.dart';
+export 'src/instance.dart';
 export 'src/singleton.dart';
 export 'src/named.dart';

cherrypick_annotations/lib/src/instance.dart

@@ -0,0 +1,17 @@
+//
+// Copyright 2021 Sergey Penkovsky (sergey.penkovsky@gmail.com)
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//      http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// ignore: camel_case_types
+class instance {
+  const instance();
+}

cherrypick_generator/lib/module_generator.dart

@@ -76,12 +76,15 @@ class BindSpec {
   /// Список параметров, которые требуются методу для внедрения зависимостей
   final List<BindParameterSpec> parameters;
 
+  final String bindingType; // 'instance' | 'provide'
+
   BindSpec({
     required this.returnType,
     required this.methodName,
     required this.isSingleton,
     required this.parameters,
     this.named,
+    required this.bindingType,
   });
 
   /// Формирует dart-код для биндинга, например:
@@ -95,11 +98,14 @@ class BindSpec {
     final argsStr = parameters.map((p) => p.generateArg()).join(', ');
 
     // Если аргументов много или они длинные — разбиваем вызов на несколько строк
-    final needMultiline = argsStr.length > 60 || argsStr.contains('\n');
+    //final needMultiline = argsStr.length > 60 || argsStr.contains('\n');
 
-    final provide = needMultiline
+    // Важно: для .toInstance всегда просто method(), для .toProvide нужна лямбда
+    final provide = bindingType == 'instance'
+        ? '.toInstance($methodName($argsStr))'
+        : (argsStr.length > 60 || argsStr.contains('\n')
             ? '.toProvide(\n${' ' * (indent + 2)}() => $methodName($argsStr))'
-        : '.toProvide(() => $methodName($argsStr))';
+            : '.toProvide(() => $methodName($argsStr))');
 
     final namePart = named != null ? ".withName('$named')" : '';
     final singletonPart = isSingleton ? '.singleton()' : '';
@@ -132,12 +138,24 @@ class BindSpec {
       params.add(BindParameterSpec(typeStr, paramNamed));
     }
 
+    // определяем bindingType
+    final hasInstance = _MetadataUtils.anyMeta(method.metadata, 'instance');
+    final hasProvide = _MetadataUtils.anyMeta(method.metadata, 'provide');
+    if (!hasInstance && !hasProvide) {
+      throw InvalidGenerationSourceError(
+        'Метод $methodName класса-модуля должен быть помечен либо @instance(), либо @provide().',
+        element: method,
+      );
+    }
+    final bindingType = hasInstance ? 'instance' : 'provide';
+
     return BindSpec(
       returnType: returnType,
       methodName: methodName,
       isSingleton: isSingleton,
       named: named,
       parameters: params,
+      bindingType: bindingType,
     );
   }
 }

examples/postly/lib/di/app_module.dart

@@ -9,16 +9,24 @@ part 'app_module.cherrypick.g.dart';
 
 @module()
 abstract class AppModule extends Module {
+  @instance()
+  int timeout() => 1000;
+
+  @instance()
+  @named('baseUrl')
+  String baseUrl() => "https://google.com";
+
+  @provide()
   @singleton()
   @named('dio')
-  Dio dio() => Dio();
+  Dio dio(@named('baseUrl') String baseUrl) =>
+      Dio(BaseOptions(baseUrl: baseUrl));
 
+  @provide()
   @singleton()
-  @named('api')
   JsonPlaceholderApi api(@named('dio') Dio dio) => JsonPlaceholderApi(dio);
 
+  @provide()
   @named('repo')
-  @singleton()
+  PostRepository repo(JsonPlaceholderApi api) => PostRepositoryImpl(api);
-  PostRepository repo(@named('api') JsonPlaceholderApi api) =>
-      PostRepositoryImpl(api);
 }