const fs = require('fs')const path = require('path')const child_process = require('child_process')const fsEx = require('fs-extra')/** * @des 該包為實(shí)驗(yàn)性API */const fsPromises = require('fs').promises

/** * @param { copiedPath: String } (被復(fù)制文件的地址，相對(duì)地址) * @param { resultPath: String } (放置復(fù)制文件的地址，相對(duì)地址) */function copyFile(copiedPath, resultPath) { copiedPath = path.join(__dirname, copiedPath) resultPath = path.join(__dirname, resultPath) try {  /**   * @des 方式一   */  // fs.writeFileSync(resultPath, fs.readFileSync(copiedPath))  /**   * @des 方式二   */  // fs.copyFileSync(copiedPath, resultPath)  console.log('success'); } catch (error) {  console.log(error); } /**  * @des 方式三  */ fsPromises.copyFile(copiedPath, resultPath)  .then(() => {   console.log('success');  }).catch((err) => {   console.log(err);  });}

/** * @param { delPath：String } （需要?jiǎng)h除文件的地址） * @param { direct：Boolean } （是否需要處理地址） */function deleteFile(delPath, direct) { delPath = direct ? delPath : path.join(__dirname, delPath) try {  /**   * @des 判斷文件或文件夾是否存在   */  if (fs.existsSync(delPath)) {   fs.unlinkSync(delPath);  } else {   console.log('inexistence path：', delPath);  } } catch (error) {  console.log('del error', error); }}

/** * @des 參數(shù)解釋同上 */function copyFolder(copiedPath, resultPath, direct) {  if(!direct) {    copiedPath = path.join(__dirname, copiedPath)    resultPath = path.join(__dirname, resultPath)  }  function createDir (dirPath) {    fs.mkdirSync(dirPath)      }  if (fs.existsSync(copiedPath)) {    createDir(resultPath)    /**     * @des 方式一：利用子進(jìn)程操作命令行方式     */    // child_process.spawn('cp', ['-r', copiedPath, resultPath])    /**     * @des 方式二：     */    const files = fs.readdirSync(copiedPath, { withFileTypes: true });    for (let i = 0; i < files.length; i++) {      const cf = files[i]      const ccp = path.join(copiedPath, cf.name)      const crp = path.join(resultPath, cf.name)       if (cf.isFile()) {        /**         * @des 創(chuàng)建文件,使用流的形式可以讀寫大文件         */        const readStream = fs.createReadStream(ccp)        const writeStream = fs.createWriteStream(crp)        readStream.pipe(writeStream)      } else {        try {          /**           * @des 判斷讀(R_OK | W_OK)寫權(quán)限           */          fs.accessSync(path.join(crp, '..'), fs.constants.W_OK)          copyFolder(ccp, crp, true)        } catch (error) {          console.log('folder write error:', error);        }      }    }  } else {    console.log('do not exist path: ', copiedPath);  }}

function deleteFolder(delPath) {  delPath = path.join(__dirname, delPath)  try {    if (fs.existsSync(delPath)) {      const delFn = function (address) {        const files = fs.readdirSync(address)        for (let i = 0; i < files.length; i++) {          const dirPath = path.join(address, files[i])          if (fs.statSync(dirPath).isDirectory()) {            delFn(dirPath)          } else {            deleteFile(dirPath, true)          }        }        /**        * @des 只能刪空文件夾        */        fs.rmdirSync(address);      }      delFn(delPath);    } else {      console.log('do not exist: ', delPath);    }  } catch (error) {    console.log('del folder error', error);  }}

/** * @des 獲取命令行傳遞的參數(shù) */const type = process.argv[2]function execute() {  /**   * @des 請(qǐng)根據(jù)不同的條件傳遞參數(shù)   */  if (type === 'copyFile') {    copyFile('./p/a.txt', './c/k.txt')  }  if (type === 'copyFolder') {    copyFolder('./p', './a')  }  if (type === 'delFile') {    deleteFile('./c/ss.txt')  }  if (type === 'delFolder') {    deleteFolder('./a')  }}execute()

/** * @des 命令行傳參 * 執(zhí)行 node ./xxx/index.js 111 222 * 輸出： * 0: C:/Program Files/nodejs/node.exe * 1: G:/GitHub/xxx/xxxx/index.js * 2: 111 * 3: 222 */process.argv.forEach((val, index) => {  console.log(`${index}: ${val}`);});

/** * @des fs-extra 包實(shí)現(xiàn) * api參考: https://github.com/jprichardson/node-fs-extra */function fsExtra() {  async function copy() {    try {      await fsEx.copy(path.join(__dirname + '/p'), path.join(__dirname + '/d'))      console.log('success');    } catch (error) {      console.log(error);    }  }  copy()}