与ES7一起使用Promise

与mz/fs的异步使用

mz模块提供了核心节点库的预期版本。使用它们很简单。首先安装库。。。

npm install mz

然后

const fs = require('mz/fs');
fs.readdir('./myDir').then(listing => console.log(listing))
  .catch(err => console.error(err));

或者，您可以在ES7中的异步函数中编写它们：

async function myReaddir () {
  try {
    const file = await fs.readdir('./myDir/');
  }
  catch (err) { console.error( err ) }
};

更新递归列表

一些用户已经指定希望看到递归列表（尽管不在问题中）。。。使用fs promise。它是mz的一个薄包装。

npm install fs-promise;

然后

const fs = require('fs-promise');
fs.walk('./myDir').then(
    listing => listing.forEach(file => console.log(file.path))
).catch(err => console.error(err));

这是一个TypeScript，可选递归，可选错误日志和异步解决方案。可以为要查找的文件名指定正则表达式。

我使用了fs extra，因为这是对fs的一个简单的超集改进。

import * as FsExtra from 'fs-extra'

/**
 * Finds files in the folder that match filePattern, optionally passing back errors .
 * If folderDepth isn't specified, only the first level is searched. Otherwise anything up
 * to Infinity is supported.
 *
 * @static
 * @param {string} folder The folder to start in.
 * @param {string} [filePattern='.*'] A regular expression of the files you want to find.
 * @param {(Error[] | undefined)} [errors=undefined]
 * @param {number} [folderDepth=0]
 * @returns {Promise<string[]>}
 * @memberof FileHelper
 */
public static async findFiles(
    folder: string,
    filePattern: string = '.*',
    errors: Error[] | undefined = undefined,
    folderDepth: number = 0
): Promise<string[]> {
    const results: string[] = []

    // Get all files from the folder
    let items = await FsExtra.readdir(folder).catch(error => {
        if (errors) {
            errors.push(error) // Save errors if we wish (e.g. folder perms issues)
        }

        return results
    })

    // Go through to the required depth and no further
    folderDepth = folderDepth - 1

    // Loop through the results, possibly recurse
    for (const item of items) {
        try {
            const fullPath = Path.join(folder, item)

            if (
                FsExtra.statSync(fullPath).isDirectory() &&
                folderDepth > -1)
            ) {
                // Its a folder, recursively get the child folders' files
                results.push(
                    ...(await FileHelper.findFiles(fullPath, filePattern, errors, folderDepth))
                )
            } else {
                // Filter by the file name pattern, if there is one
                if (filePattern === '.*' || item.search(new RegExp(filePattern, 'i')) > -1) {
                    results.push(fullPath)
                }
            }
        } catch (error) {
            if (errors) {
                errors.push(error) // Save errors if we wish
            }
        }
    }

    return results
}

使用flatMap：

function getFiles(dir) {
  return fs.readdirSync(dir).flatMap((item) => {
    const path = `${dir}/${item}`;
    if (fs.statSync(path).isDirectory()) {
      return getFiles(path);
    }

    return path;
  });
}

给定以下目录：

dist
├── 404.html
├── app-AHOLRMYQ.js
├── img
│   ├── demo.gif
│   └── start.png
├── index.html
└── sw.js

用法：

getFiles("dist")

输出：

[
  'dist/404.html',
  'dist/app-AHOLRMYQ.js',
  'dist/img/demo.gif',
  'dist/img/start.png',
  'dist/index.html'
]

使用npm列表内容模块。它读取给定目录的内容和子内容，并返回文件和文件夹路径列表。

const list = require('list-contents');

list("./dist",(o)=>{
  if(o.error) throw o.error;
   console.log('Folders: ', o.dirs);
   console.log('Files: ', o.files);
});

获取排序的文件名。您可以基于特定扩展名（如“.txt”、“.jpg”等）过滤结果。

import * as fs from 'fs';
import * as Path from 'path';

function getFilenames(path, extension) {
    return fs
        .readdirSync(path)
        .filter(
            item =>
                fs.statSync(Path.join(path, item)).isFile() &&
                (extension === undefined || Path.extname(item) === extension)
        )
        .sort();
}

获取所有分区中的文件

const fs=require('fs');

function getFiles (dir, files_){
    files_ = files_ || [];
    var files = fs.readdirSync(dir);
    for (var i in files){
        var name = dir + '/' + files[i];
        if (fs.statSync(name).isDirectory()){
            getFiles(name, files_);
        } else {
            files_.push(name);
        }
    }
    return files_;
}

console.log(getFiles('path/to/dir'))