Node fs.readdir not working in Grunt file

Question

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);
    })


}

I answered a similar question here: http://stackoverflow.com/questions/28597314/retrieving-output-from-node-script-in-a-grunt-task/28597528?noredirect=1#comment45525856_28597528 — sctskw, Feb 20 '15 at 01:34

score 7 · Accepted Answer · edited Dec 06 '16 at 20:00

7

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' ]

edited Dec 06 '16 at 20:00

isnvi23h4

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answered Feb 20 '15 at 04:24

sctskw

1,588
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fixed. didn't seem to affect it though :) – sctskw Feb 20 '15 at 04:32
@sctskw: sorry mate. I got it now. Thanks so much :) – TrongBang Feb 21 '15 at 12:00
No problem. Select an answer if you're satisfied. Cheers – sctskw Feb 21 '15 at 18:22

Node fs.readdir not working in Grunt file

1 Answers1