初始化项目

npm init -y

添加依赖和bin

{
  "name": "@jf/lowcode",
  "version": "1.0.1-beta.0",
  "description": "A simple lowcode CLI for project templates management.",
  "main": "bin/lowcode.js",
  "files": [
    "bin",
    "template.json"
  ],
  "bin": {
    "lowcode": "bin/lowcode.js",
    "lowcode-cli": "bin/lowcode.js",
    "lowcode-add": "bin/lowcode-add.js",
    "lowcode-update": "bin/lowcode-update.js",
    "lowcode-delete": "bin/lowcode-delete.js",
    "lowcode-list": "bin/lowcode-list.js",
    "lowcode-init": "bin/lowcode-init.js"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "release:beta": "node scripts/publish-beta.js",
    "release:prod": "node scripts/publish-prod.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "chalk": "^3.0.0",
    "commander": "^5.0.0",
    "download-git-repo": "^3.0.2",
    "inquirer": "^7.1.0",
    "ora": "^4.0.3"
  }
}

根目录创建文件夹bin以及文件

//lowcode.js

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

// 定义当前版本
// 定义使用方法
// 定义四个指令
program
  .version(require('../package').version)
  .usage('<command> [options]')
  .command('add', 'add a new template')
  .command('delete', 'delete a template')
  .command('list', 'list all the templates')
  .command('init', 'generate a new project from a template')
  .command('update', 'update a template')
  
// 解析命令行参数
program.parse(process.argv)

//lowcode-add.js

#!/usr/bin/env node

// 交互式命令行
const inquirer = require('inquirer')
// 修改控制台字符串的样式
const chalk = require('chalk')
// node 内置文件模块
const fs = require('fs')
// 读取根目录下的 template.json
const tplObj = require(`${__dirname}/../template`)

// 自定义交互式命令行的问题及简单的校验
let question = [
  {
    name: "name",
    type: 'input',
    message: "请输入模板名称",
    validate (val) {
      if (val === '') {
        return 'Name is required!'
      } else if (tplObj[val]) {
        return 'Template has already existed!'
      } else {
        return true
      }
    }
  },
  {
    name: "url",
    type: 'input',
    message: "请输入模板地址",
    validate (val) {
      if (val === '') return 'The url is required!'
      return true
    }
  }
]

inquirer
  .prompt(question).then(answers => {
    // answers 就是用户输入的内容，是个对象
    let { name, url } = answers;
    // 过滤 unicode 字符
    tplObj[name] = url.replace(/[\u0000-\u0019]/g, '')
    // 把模板信息写入 template.json 文件中
    fs.writeFile(`${__dirname}/../template.json`, JSON.stringify(tplObj), 'utf-8', err => {
      if (err) console.log(err)
      console.log('\n')
      console.log(chalk.green('Added successfully!\n'))
      console.log(chalk.grey('The latest template list is: \n'))
      console.log(tplObj)
      console.log('\n')
    })
  })

//lowcode-delete.js

#!/usr/bin/env node

const inquirer = require('inquirer')
const chalk = require('chalk')
const fs = require('fs')
const tplObj = require(`${__dirname}/../template`)

let question = [
    {
        name: "name",
        message: "请输入要删除的模板名称",
        validate(val) {
            if (val === '') {
                return 'Name is required!'
            } else if (!tplObj[val]) {
                return 'Template does not exist!'
            } else {
                return true
            }
        }
    }
]

inquirer
    .prompt(question).then(answers => {
        let { name } = answers;
        delete tplObj[name]
        // 更新 template.json 文件
        fs.writeFile(`${__dirname}/../template.json`, JSON.stringify(tplObj), 'utf-8', err => {
            if (err) console.log(err)
            console.log('\n')
            console.log(chalk.green('Deleted successfully!\n'))
            console.log(chalk.grey('The latest template list is: \n'))
            console.log(tplObj)
            console.log('\n')
        })
    })

//lowcode-init.js

#!/usr/bin/env node

const program = require('commander')
const chalk = require('chalk')
const ora = require('ora')
const download = require('download-git-repo')
const tplObj = require(`${__dirname}/../template`)

program
    .usage('<template-name> [project-name]')
program.parse(process.argv)
// 当没有输入参数的时候给个提示
if (program.args.length < 1) return program.help()

// 好比 vue init webpack project-name 的命令一样，第一个参数是 webpack，第二个参数是 project-name
let templateName = program.args[0]
let projectName = program.args[1]
// 小小校验一下参数
if (!tplObj[templateName]) {
    console.log(chalk.red('\n Template does not exit! \n '))
    return
}
if (!projectName) {
    console.log(chalk.red('\n Project should not be empty! \n '))
    return
}

url = tplObj[templateName]

console.log(chalk.white('\n Start generating... \n'))
// 出现加载图标
const spinner = ora("Downloading...");
spinner.start();
// 执行下载方法并传入参数
download(
    url,
    projectName,
    { clone: true },
    err => {
        if (err) {
            spinner.fail();
            console.log(chalk.red(`Generation failed. ${err}`))
            return
        }
        // 结束加载图标
        spinner.succeed();
        console.log(chalk.cyan('\n Generation completed!'))
        console.log(chalk.cyan('\n To get started'))
        console.log(chalk.cyan(`\n    cd ${projectName} \n`))
    }
)

//lowcode-list.js

#!/usr/bin/env node

const tplObj = require(`${__dirname}/../template`)
console.log(tplObj)

//lowcode-update.js

#!/usr/bin/env node

const inquirer = require('inquirer')
const chalk = require('chalk')
const fs = require('fs')
const tplObj = require(`${__dirname}/../template.json`)

let question = [
  {
    name: "name",
    type: 'input',
    message: "请输入要更新的模板名称",
    validate (val) {
      if (val === '') {
        return 'Name is required!'
      } else if (!tplObj[val]) {
        return 'Template does not exist!'
      } else {
        return true
      }
    }
  },
  {
    name: "url",
    type: 'input',
    message: "请输入新的模板地址",
    validate (val) {
      if (val === '') return 'The url is required!'
      return true
    }
  }
]

inquirer
  .prompt(question).then(answers => {
    let { name, url } = answers;
    tplObj[name] = url.replace(/[\u0000-\u0019]/g, '')
    
    fs.writeFile(`${__dirname}/../template.json`, JSON.stringify(tplObj), 'utf-8', err => {
      if (err) console.log(err)
      console.log('\n')
      console.log(chalk.green('Updated successfully!\n'))
      console.log(chalk.grey('The latest template list is: \n'))
      console.log(tplObj)
      console.log('\n')
    })
  })

创建.npmignore

node_modules
.DS_Store
package-lock.json
*.log

创建template.json

{}

完成后需要执行根目录终端执行：

npm link

配置模版，根目录终端执行：

lowcode-add

配置模版名称和仓库即可：

最终会在template.js中生成模版。

{
  "jf-lowcode-cli": "direct:http://gitlab.yintech.net/rjhy/jfzt/frontend/business-lines/jf-lowcode-core/jf-lowcode-cli.git"
}

此时尝试本地拉项目：

lowcode-init jf-lowcode-cli my-app

最后配置好以后发布到npm包即可

npm publish 

使用npx可以直接创建脚手架

npx @jf/lowcode init jf-lowcode-cli my-project