3、准备阶段开发

'use strict'
const fs = require('fs')
const inquirer = require('inquirer')
const fse = require('fs-extra')
const semver = require('semver')
const Command = require('@haha-cli-dev/command')
const log = require('@haha-cli-dev/log')
const TYPE_PROJECT = 'project'
const TYPE_COMPONENT = 'component'
class initCommand extends Command {
  init() {
    this.projectName = this._argv[0]
    console.log('projectName', this.projectName)
  }
  exec() {
    try {
      //1、准备阶段
      this.prepare()
      //2、下载模板
      //3、安装模板
    } catch (error) {
      log.error(error.message)
    }
  }
  async prepare() {
    //当前执行node命令时候的文件夹地址 ——工作目录
    const localPath = process.cwd()
    const force = this._argv[1]?.force
    let isContinue = false
    if (this.isCmdEmpty(localPath)) {
      //1.1 询问是否继续创建
      if (!force) {
        const res = await inquirer.prompt({
          type: 'confirm',
          name: 'isContinue',
          message: '当前文件夹内容不为空,是否在此继续创建项目?',
          default: false
        })
        isContinue = res.isContinue
        if (!isContinue) {
          return false
        }
      }
    }
    // 2.是否启动强制安装
    if (isContinue || force) {
      const { isDelete } = await inquirer.prompt({
        type: 'confirm',
        name: 'isDelete',
        message: '是否清空当前目录下的文件?',
        default: false
      })
      if (isDelete) {
        // 清空当前目录
        fse.emptyDirSync(localPath)
      }
    }
    return this.getBaseInfo()
  }
  //3、选择创建项目或组件
  async getBaseInfo() {
    const { type } = await inquirer.prompt({
      type: 'list',
      message: '请选择初始化类型',
      name: 'type',
      default: TYPE_PROJECT,
      choices: [
        {
          name: '项目',
          value: TYPE_PROJECT
        },
        {
          name: '组件',
          value: TYPE_COMPONENT
        }
      ]
    })
    if (type === TYPE_COMPONENT) {
    }
    if (type === TYPE_PROJECT) {
      const { project, version } = await inquirer.prompt([
        {
          type: 'input',
          message: '请输入项目名称',
          name: 'project',
          default: 'haha-demo',
          validate: function (val) {
            //检查项目名称和版本号的合法性
            const done = this.async()
            setTimeout(function () {
              //1、必须首字母大写，
              //2、尾字符必须为英文或者数字，不能为字符
              //3、字符仅允许'-_'
              //类型合法有：a a-b a_b a-b-c a_b_c a1_b1_c1 a1 a1-b1-c1
              if (!/^[a-zA-Z]+([-][a-zA-Z0-9]|[_][a-zA-Z0-9]|[a-zA-Z0-9])*$/.test(val)) {
                done('请输入合法的项目名称(要求英文字母开头,数字或字母结尾,字符只允许使用 - 以及 _)')
                return
              }
              done(null, true)
            }, 0)
          }
        },
        {
          type: 'input',
          message: '请输入项目版本号',
          name: 'version',
          default: '1.0.0',
          validate: function (val) {
            const done = this.async()
            setTimeout(function () {
              //!!semver.valid(val) !!转成Boolean类型
              if (!!!semver.valid(val)) {
                done('请输入合法的版本号')
                return
              }
              done(null, true)
            }, 0)
          },
          filter: val => {
            if (!!semver.valid(val)) {
              return semver.valid(val)
            }
            return val
          }
        }
      ])
      //4、获取项目的基本信息
      return {
        type,
        project,
        version
      }
    }
  }
  //判断当前路径是否不为空
  isCmdEmpty(localPath) {
    let fileList = fs.readdirSync(localPath)
    fileList = fileList.filter(item => !item.startsWith('.') && item !== 'node_modules')
    return fileList && fileList.length > 0
  }
}
function init(argv) {
  return new initCommand(argv)
}
module.exports = init
module.exports.initCommand = initCommand