Flutter代码质量与规范插件merch_lints的使用

Merch Lints

Merch Lints 是一组用于Dart和Flutter的代码检查规则，由 flexagoon 和 chftm 使用。

此包结合了来自 very_good_analysis 和 dart_code_linter 的规则，并对一些默认值进行了调整。

使用方法

添加依赖

首先，在您的 pubspec.yaml 文件中添加 merch_lints 作为开发依赖项：

dev_dependencies:
  merch_lints: ^1.0.0

然后运行以下命令来安装依赖：

dart pub get

配置分析选项

在您的项目根目录下找到或创建一个名为 analysis_options.yaml 的文件。将以下内容添加到该文件中：

include: package:merch_lints/analysis_options.yaml

这将会引入 merch_lints 中定义的所有代码检查规则。

示例代码

假设您有一个简单的Flutter应用，包含一个按钮和文本字段。我们来看看如何使用 merch_lints 来确保代码质量和规范。

pubspec.yaml

name: example_app
description: A simple Flutter application using merch_lints.

version: 1.0.0+1

environment:
  sdk: ">=2.18.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^1.0.2

dev_dependencies:
  merch_lints: ^1.0.0
  flutter_test:
    sdk: flutter

analysis_options.yaml

include: package:merch_lints/analysis_options.yaml

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  final String title;

  MyHomePage({required this.title});

  [@override](/user/override)
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text('You have pushed the button this many times:'),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}