Node fs.readdir not working in Grunt file

gruntjs, javascript, node.js

Solution

To get the node file system working inside grunt, the task needs to be asynchronous . Here is the code:

var fs = require('fs');

module.exports = function(grunt) {


  grunt.registerTask('showFiles', function() {
    var done = this.async(); // creating an async variable

    fs.readdir('.', function(err, files) {
      console.log(files);
      done(); // call when the task is done
    })
  })

  var files = fs.readdirSync('.');
  console.log('Showing Files Read Synchronously');
  console.log(files);
}

//output

▶ grunt showFiles
Showing Files Read Synchronously
[ 'Gruntfile.js', 'index.js', 'node_modules', 'test.js' ]
Running "showFiles" task
[ 'Gruntfile.js', 'index.js', 'node_modules', 'test.js' ]

Problem

When I ran my commands in Node command prompt, they worked fine. ``` fs= require('fs') fs.readdir('.',function(e,files){console.log(files)}) ``` However, when I inserted the lines above into my gruntfile.js, the callback function was not executed at all. Can you please tell me how I can get a list of files in a certain folder in Gruntfile.js? Gruntfile.js: ``` 'use strict'; var fs= require('fs'); module.exports= function(grunt){ var configs = require('load-grunt-configs')(grunt); grunt.initConfig(configs); require('load-grunt-tasks')(grunt); fs.readdir('.', function(err,files){ console.log(files); }) } ```

Original source