walkDirs.js

var files = [];

function walkDirs( start ){
    //since this is happening async how can I tell when it's done to process the files
   fs.readdirSync( start, function( error, data ){

        if( error ){
            console.error( 'Oops!', error );
        }
        else{

            data.forEach( function( dirItem ){
                if( fs.lstatSync( start + '/' +  dirItem ).isDirectory() ){
                   return walkDirs( start + '/' +  dirItem );
                }
                else{
                    allFiles.push( dirItem );
                }
            });
        }
    } );
}