node通过npm写一个cli命令行工具(2)
这就是功能命令,定义了一个generate命令,.alias('g')是该命令的缩写,然后.action(function(type, name){xu.run(type, name); });返回一个函数,这个函数就是我们定义这个命令需要做什么事。
编写功能函数
./src/generate.js
这个文件就定义了当我们输入
$ xu g
所做的操作了。
/** * Created by xushaoping on 17/10/11. */ const fs = require('fs-extra') const chalk = require('chalk') exports.run = function(type, name) { switch (type) { case 'page': const pageFile = './src/page/' + name + '/' + name + '.vue' const styleFile = './src/page/' + name + '/' + name + '.less' fs.pathExists(pageFile, (err, exists) => { if (exists) { console.log('this file has created') } else { fs.copy('/usr/local/lib/node_modules/vue-xu-generate/src/template/page.vue', pageFile, err => { if (err) return console.error(err) console.log(pageFile + ' has created') }) fs.copy('/usr/local/lib/node_modules/vue-xu-generate/src/template/page.less', styleFile, err => { if (err) return console.error(err) console.log(styleFile + ' has created') }) } }) break; case 'component': const componentFile = './src/components/' + name + '.vue' fs.pathExists(componentFile, (err, exists) => { if (exists) { console.log('this file has created') } else { fs.copy('/usr/local/lib/node_modules/vue-xu-generate/src/template/component.vue', componentFile, err => { if (err) return console.error(err) console.log(componentFile + ' has created') }) } }) break; case 'store': const storeFile = './src/store/modules' + name + '.js' fs.pathExists(storeFile, (err, exists) => { if (exists) { console.log('this file has created') } else { fs.copy('/usr/local/lib/node_modules/vue-xu-generate/src/template/store.js', storeFile, err => { if (err) return console.error(err) console.log(storeFile + ' has created') }) } }) break; default: console.log(chalk.red(`ERROR: uncaught type , you should input like $ xu g page demo` )) console.log() console.log(' Examples:') console.log() console.log(chalk.gray(' # create a new page')) console.log(' $ xu g page product') console.log() console.log(chalk.gray(' # create a new component')) console.log(' $ xu g component product') console.log() console.log(chalk.gray(' # create a new store')) console.log(' $ xu g store product') console.log() break; } };
这里有2个新的依赖,分别是命令输出颜色和一个文件操作的插件,通过npm安装。