node-cli-demo-lbb/bin/Generator.js

const {getRepoList,getTagList} = require("./http")
const ora = require('ora')
const inquirer = require("inquirer")
const downloadGitRepo = require('download-git-repo')
const util = require('util')
const path = require('path')
const chalk = require('chalk')


async function wrapLoading(fn,message,...args){
    const spinner = ora(message);
    spinner.start()
    try {
        const result = await fn(...args)
        spinner.succeed()
        return result
    } catch (error) {
        spinner.fail('Request failed,refetch')
    }
    
}
class Generator {
    constructor(name,targetDir){
        this.name = name;
        this.targetDir = targetDir
        this.downloadGitRepo = util.promisify(downloadGitRepo);
    }
    async getRepo(){
        const repoList = await wrapLoading(getRepoList,'waiting fetch template')
        if(!repoList) return;

        const repos = repoList.map(item => item.name);

        const {repo} = await inquirer.prompt({
            name:"repo",
            type:'list',
            choices:repos,
            message:'Please choose a template to create project'
        })
        return repo
    }

    async getTag(repo){
        const tags = await wrapLoading(getTagList, 'waiting fetch tag', repo);

        if(!tags) return;

        const tagList = tags.map(item => item.name)

        const {tag} = await inquirer.prompt({
            name:'tag',
            type:'list',
            choices:tagList,
            message: 'Place choose a tag to create project'
        })
        return tag
    }

    async download(repo,tag){
        const requestUrl = `zhurong-cli/${repo}${tag?'#'+tag:''}`;
        await wrapLoading(this.downloadGitRepo,
            'waiting download template', // 加载提示信息
            requestUrl, // 参数1: 下载地址
            path.resolve(process.cwd(), this.targetDir)
        )
    }
    async create(){
        const repo = await this.getRepo()

        const tag = await this.getTag(repo)

        // 3）下载模板到模板目录
        await this.download(repo, tag)

        console.log(`\r\nSuccessfully created project ${chalk.cyan(this.name)}`)
        console.log(`\r\n  cd ${chalk.cyan(this.name)}`)
        console.log('  npm run dev\r\n')
        //console.log('用户选择了，repo=' + repo+',tag='+ tag)
    }
}
module.exports = Generator