let fs = require('fs')
let path = require('path')


// 获取命令行参数
let parm = process.argv.splice(2)
// 第一个参数是路径
let rootPath = parm[0]
// 后面的所有参数都是文件后缀
let types = parm.splice(1)
// 需要过滤的文件夹
let filter = ['./node_modules']
// 统计结果
let num = 0


// 获取行数
async function line(path) {
    let rep = await fs.readFileSync(path)
    rep = rep.toString()
    let lines = rep.split('\n')
    console.log(path + ' ' + lines.length)
    num += lines.length
}


// 递归所有文件夹统计
async function start(pt) {
    let files = fs.readdirSync(pt)
    files
        .map(file => {
            return `${pt}/${file}`
        })
        .forEach(file => {
            let stat = fs.statSync(file)
            if (stat.isDirectory()) {
                if (filter.indexOf(pt) != -1) {
                    return
                }
                start(file)
                return
            }
            let ext = path.extname(file)
            if (types.indexOf(ext) != -1) {
                line(file)
            }
        })
}


;(async () => {
    await start(rootPath)
    console.log(`总代码行数：${num}`)
})()
