开发一个Parcel-vue脚手架工具(详细步骤)

npm install commander download-git-repo inquirer handlebars ora chalk log-symbols -S

{
 "name": "suporka-parcel-vue",
 "version": "1.0.0",
 "description": "a vue cli which use parcel to package object",
 "bin": {
  "suporka-parcel-vue": "index.js"
 },
 ...
}

#!/usr/bin/env node
const program = require('commander');

program.version('1.0.0', '-v, --version')
  .command('init <name>')
  .action((name) => {
    console.log(name);
  });
program.parse(process.argv);

node index.js init HelloWorld

const inquirer = require('inquirer');
inquirer.prompt([
  {
    name: 'description',
    message: 'Input the object description'
  },
  {
    name: 'author',
    message: 'Input the object author'
  }
  ]).then((answers) => {
  console.log(answers.author);
})

{
 "name": "{{name}}",
 "version": "1.0.0",
 "description": "{{description}}",
 "scripts": {
  "test": "echo \"Error: no test specified\" && exit 1"
 },
 "author": "{{author}}",
 "license": "ISC"
}

const ora = require('ora');
// 开始下载
const spinner = ora('正在下载模板...');
spinner.start();

// 下载失败调用
spinner.fail();

// 下载成功调用
spinner.succeed();

const chalk = require('chalk');
console.log(chalk.green('项目创建成功'));
console.log(chalk.red('项目创建失败'));

const chalk = require('chalk');
const symbols = require('log-symbols');
console.log(symbols.success, chalk.green('项目创建成功'));
console.log(symbols.error, chalk.red('项目创建失败'));

// index.js
#!/usr/bin/env node
// 处理用户输入的命令
const program = require('commander');
// 下载模板
const download = require('download-git-repo');
// 问题交互
const inquirer = require('inquirer');
// node 文件模块
const fs = require('fs');
// 填充信息至文件
const handlebars = require('handlebars');
// 动画效果
const ora = require('ora');
// 字体加颜色
const chalk = require('chalk');
// 显示提示图标
const symbols = require('log-symbols');
// 命令行操作
var shell = require("shelljs");

program.version('1.0.1', '-v, --version')
 .command('init <name>')
 .action((name) => {
  if (!fs.existsSync(name)) {
   inquirer.prompt([
    {
     name: 'description',
     message: 'Input the object description'
    },
    {
     name: 'author',
     message: 'Input the object author'
    }
   ]).then((answers) => {
    const spinner = ora('Downloading...');
    spinner.start();
    download('zxpsuper/suporka-parcel-vue', name, (err) => {
     if (err) {
      spinner.fail();
      console.log(symbols.error, chalk.red(err));
     } else {
      spinner.succeed();
      const fileName = `${name}/package.json`;
      const meta = {
       name,
       description: answers.description,
       author: answers.author
      }
      if (fs.existsSync(fileName)) {
       const content = fs.readFileSync(fileName).toString();
       const result = handlebars.compile(content)(meta);
       fs.writeFileSync(fileName, result);
      }
      console.log(symbols.success, chalk.green('The vue object has downloaded successfully!'));
      inquirer.prompt([
       {
        type: 'confirm',
        name: 'ifInstall',
        message: 'Are you want to install dependence now?',
        default: true
       }
      ]).then((answers) => {
       if (answers.ifInstall) {
        inquirer.prompt([
         {
          type: 'list',
          name: 'installWay',
          message: 'Choose the tool to install',
          choices: [
           'npm', 'cnpm'
          ]
         }
        ]).then(ans => {
         if (ans.installWay === 'npm') {
          let spinner = ora('Installing...');
          spinner.start();
          // 命令行操作安装依赖
          shell.exec("cd " + name + " && npm i", function (err, stdout, stderr) {
           if (err) {
            spinner.fail();
            console.log(symbols.error, chalk.red(err));
           }
           else {
            spinner.succeed();
            console.log(symbols.success, chalk.green('The object has installed dependence successfully!'));
           }
          });
         } else {
          let spinner = ora('Installing...');
          spinner.start();
          shell.exec("cd " + name + " && cnpm i", function (err, stdout, stderr) {
           if (err) {
            spinner.fail();
            console.log(symbols.error, chalk.red(err));
           }
           else {
            spinner.succeed();
            console.log(symbols.success, chalk.green('The object has installed dependence successfully!'));
           }
          })
         }
        })
       } else {
        console.log(symbols.success, chalk.green('You should install the dependence by yourself!'));
       }
      })
     }
    })
   })
  } else {
   // 错误提示项目已存在，避免覆盖原有项目
   console.log(symbols.error, chalk.red('The object has exist'));
  }
 });
program.parse(process.argv);