node.js fs.readdir recursive directory search -

any ideas on async directory search using fs.readdir? realise introduce recursion , call read directory function next directory read, little worried not being async...

any ideas? i've looked @ node-walk great, doesn't give me files in array, readdir does. although

looking output like...

['file1.txt', 'file2.txt', 'dir/file3.txt'] 

there 2 ways of accomplishing this. in async environment you'll notice there 2 kinds of loops: serial , parallel. serial loop waits 1 iteration complete before moves onto next iteration - guarantees every iteration of loop completes in order. in parallel loop, iterations started @ same time, , 1 may complete before another, however, faster serial loop. in case, it's better use parallel loop because doesn't matter order walk completes in, long completes , returns results (unless want them in order).

a parallel loop this:

var fs = require('fs'); var path = require('path'); var walk = function(dir, done) {   var results = [];   fs.readdir(dir, function(err, list) {     if (err) return done(err);     var pending = list.length;     if (!pending) return done(null, results);     list.foreach(function(file) {       file = path.resolve(dir, file);       fs.stat(file, function(err, stat) {         if (stat && stat.isdirectory()) {           walk(file, function(err, res) {             results = results.concat(res);             if (!--pending) done(null, results);           });         } else {           results.push(file);           if (!--pending) done(null, results);         }       });     });   }); }; 

a serial loop this:

var fs = require('fs'); var walk = function(dir, done) {   var results = [];   fs.readdir(dir, function(err, list) {     if (err) return done(err);     var = 0;     (function next() {       var file = list[i++];       if (!file) return done(null, results);       file = dir + '/' + file;       fs.stat(file, function(err, stat) {         if (stat && stat.isdirectory()) {           walk(file, function(err, res) {             results = results.concat(res);             next();           });         } else {           results.push(file);           next();         }       });     })();   }); }; 

and test out on home directory (warning: results list huge if have lot of stuff in home directory):

walk(process.env.home, function(err, results) {   if (err) throw err;   console.log(results); }); 

edit: improved examples.