Javascript: List of files and directories

JS: Asynchronous programming
Last update: 24 Jan 23:20
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ls.js

Implement and export as default a function that takes a path (absolute or relative) and returns information about files and directories found there. The data is returned as an array of objects, each containing details on a single file: a path and permissions (stat.mode). The objects in the array must be sorted by file name.

Examples

import ls from '../ls.js';

await ls('/var');
// [
//   { filepath: '/var/local', mode: 17917 },
//   { filepath: '/var/lock', mode: 17407 },
//   { filepath: '/var/log', mode: 16877 },
// ];

await ls('/etc/passwd');
// [{ filepath: '/etc/passwd', mode: 33188 }];

await ls('../../../../etc/passwd');
// [{ filepath: '/etc/passwd', mode: 33188 }];

Along with processing directories, this function must be able to handle files as well. In this scenario, an array with one object – information about the current file — is returned.

Tips

  • readdir() reads directory
  • stat() provides a file info. isFile() checks if it's a file, mode gives a permission description
  • zipWith() is a helper function from lodash

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