node命令行工具之实现项目工程自动初始化的标准流程

npg-cli --help
♫ ♫♬♪♫ npm-package-cli ♫ ♫♬♪♫
Usage: npg-cli [options]
Options:
 -V, --version output the version number
 -h, --help  output usage information
 run testcli and edit the setting.

npg-cli
♫ ♫♬♪♫ npm-package-cli ♫ ♫♬♪♫
Follow the prompts to complete the project configuration.
? project name test
? version 1.0.0
? description

 npm-package-cli
  |-- package.json

#!/usr/bin/env node
console.log('hello world');

"bin": {
 "npg-cli": "bin/cli"
}

 npm-package-cli
  |-- bin
   |-- cli
  |-- package.json

npg-cli

# 输出
hello world

class Creation{
 constructor(){
 // code
 }
 do(){
  // code
 }
 // other function
}

 npm-package-cli
  |-- bin
   |-- cli
  |-- src
   |-- index.js
  |-- package.json

#!/usr/bin/env node
const Creator = require('../src/index.js');
const project = new Creator();
project.do();

const commander = require('commander');
const chalk = require('chalk');
const packageJson = require('../package.json');
const log = console.log;
function initCommand(){
 commander.version(packageJson.version)
  .on('--help', ()=>{
   log(chalk.green(' run testcli and edit the setting.'));
  })
  .parse(process.argv);
}
module.exports = initCommand;

 npm-package-cli
  |-- bin
   |-- cli
  |-- src
   |-- command.js
   |-- index.js
  |-- package.json

// src/index.js Creation
const initCommand = require('./command');

class Creation{
 // other code
 do(){
  initCommand();
 }
}

Usage: npg-cli [options]

Options:
 -V, --version output the version number
 -h, --help  output usage information
 run testcli and edit the setting.

const inquirer = require('inquirer');
const fse = require('fs-extra');

function initSetting(){
 let prompt = [
  {
   type: 'input',
   name: 'projectName',
   message: 'project name',
   validate(input){
    if(!input){
     return 'project name is required.'
    }
    if(fse.existsSync(input)){
     return 'project name of folder is exist.'
    }
    return true;
   }
  },
  // other prompt
 ];

 return inquirer.prompt(prompt);
}

module.exports = initSetting;

 npm-package-cli
  |-- bin
   |-- cli
  |-- src
   |-- command.js
   |-- index.js
   |-- setting.js
  |-- package.json

// src/index.js Creation
const initCommand = require('./command');
const initSetting = require('./setting');

class Creation{
 // other code
 do(){
  initCommand();
  initSetting().then(setting => {
   // 用户输入完成后，会得到全部输入信息的json数据 setting
  });
 }
}

const chalk = require('chalk');
const fse = require('fs-extra');
const path = require('path');
const log = console.log;

function output(creation){
 return new Promise((resolve, reject)=>{
  // 拿到配置信息
  const setting = creation._setting;
  const {
   projectName
  } = setting;
  // 获取当前命令行执行环境所在文件夹
  const cwd = process.cwd();

  // 初始化文件夹path
  const projectPath = path.join(cwd, projectName);
  const projectResolve = getProjectResolve(projectPath);
  
  // 新建项目文件夹
  fse.mkdirSync(projectPath);

  // copy文件夹
  creation.copy('src', projectResolve('src'));
  // 根据配置信息，替换文件内容
  creation.copyTpl('package.json', projectResolve('package.json'), setting);

  // 将内存中的文件，输出到硬盘上
  creation._mfs.commit(() => {
   resolve(); 
  });
 });
}

module.exports = output;

// src/index.js Creation
const initCommand = require('./command');
const initSetting = require('./setting');
const output = require('./output');

class Creation{
 // other code
 do(){
  initCommand();
  initSetting().then(setting => {
   // 用户输入完成后，会得到全部输入信息的json数据 setting
   this._setting = Object.assign({}, this._setting, setting);
   // 输出文件
   output(this).then(res => {
    // 项目输出完成
   });
  });
 }
}

"dependencies": {
 "chalk": "^2.4.2",
 "commander": "^3.0.0",
 "fs-extra": "^8.1.0",
 "inquirer": "^6.5.0",
 "mem-fs": "^1.1.3",
 "mem-fs-editor": "^6.0.0",
 "shelljs": "^0.8.3"
},

npm install -g npm-package-cli