Dart 创建命令行工程 开发生产工具(以MacOS为例)

Dart 开发 命令行 工具还是挺舒服的，编译成二进制，丢到其他设备里面就可以跑，唯一可惜目前不支持交叉编译。

创建工程并配置

• 打开终端，cd 进入到任意文件目录
• dart create -t console-full shopidstool
• 创建完，打开当前文件路径，将shopidstool工程拖到Android Studio 打开
• 简单配置下工程，点击左上角Android Studio -> Preference,如下图
  
• 设置下运行配置，点击Add Configurations
  
• 有用到的三方库，就在pubspec.yaml配置，代码写在bin/xxx.dart
  

Demo示例(爬取shopid比对，有更新通知并打印)

一个简单的工具demo，涉及到的知识点有网络请求数据，正则匹配，数组去重，md5加密字符串，本地文件读写

import 'dart:convert';
import 'dart:io';

import 'package:crypto/crypto.dart';

var fileurl1 =
    'https://raw.githubusercontent.com/Aaron-lv/JavaScript/master/Task/jd_shop_sign.js';

var fileurl2 = 'https://raw.githubusercontent.com/liu1wei/sss/main/jd_dpqd.js';

Future<List<String>?> getFile(fileurl) async {
  var httpClient = HttpClient();
  var request = await httpClient.getUrl(Uri.parse(fileurl));
  var response = await request.close();
  if (response.statusCode == HttpStatus.ok) {
    var responseBody = await response.transform(utf8.decoder).join();
    var shopIdsReg = RegExp(r'[A-Z0-9]{32}');
    var matchs = shopIdsReg.allMatches(responseBody);
    var shopList = <String>[];
    for (var match in matchs) {
      var shopid = match.group(0);
      shopList.add(shopid ??= '');
    }
    return shopList;
  } else {
    var result =
        'Error getting IP address:\nHttp status ${response.statusCode}';
    print(result);
    return null;
  }
}

Future getShops() {
  var shops;
  return Future.wait([getFile(fileurl1), getFile(fileurl2)]).then((value) {
    var shops1 = value[0];
    var shops2 = value[1];
    shops = [...?shops1, ...?shops2];
    return shops;
  });
}

Future<String?> readShopIDsMd5() {
  return File('shopidsMd5.txt').readAsLines().then((List<String> contents) {
    String? res;
    contents.forEach((ck) {
      res = ck;
    });
    return res;
  }).catchError((e) {
    return '';
  });
}

void writeMD5Res(String res) {
  var file = File('shopidsMd5.txt');
  var sink = file.openWrite();
  sink.write(res);
  sink.close();
}

void main(List<String> args) {
  // 读取上次MD5
  readShopIDsMd5().then((lastRes) {
    getShops().then((shops) {
      var resList = shops.toSet().toList();
      var shopIDs = resList.join('&');
      var md5Res = md5.convert(utf8.encode(shopIDs)).toString();
      if (md5Res != lastRes) {
        print(shopIDs);
        print('数据已经更新，请手动替换');
        writeMD5Res(md5Res);
      } else {
        print('数据无需更新');
        exit(1);
      }
    });
  });
}

编译成果物

• 点击Android Studio 底部 Terminal 打开终端
• dart compile exe bin/shopidstool.dart -o ShopidsTool