Simple lightweight `minderd` frontend/output parser written for/in node/js

lantern.js

#!/usr/bin/env node
var spawn = require('child_process').spawn,
  util = require('util'),
  child;
var bin= './minerd.exe',
args = { 
  algo: 'scrypt',
  threads: 8,
  user: 'LXKwG9oYazZPUc6ozF5t3zyf6xBxbEbTXP',
  pass: 'x',
  url: 'http://buf.snicter.com:9327',
  scantime: 15
};
var args=  Object.keys(args).map(function(i){ return '--'+i+" "+args[i]}).join(' ').split(' ');
var cores=[],log=[];
child = spawn(bin,args);

var updateSpeed = function(){
  var speed = cores.reduce(function(c,i){
    return c+i.speed;
  },0);
  speed = Math.round(speed*100)/100.0;
  util.print("\u001b[2J\u001b[0;0H");
  util.print("Speed: \t"+speed+" \tkhash/s\n");
  log.splice(0,log.length - 15);
  log.forEach(function(line){
    util.print(line);
  });
};
child.stdout.on('data',function(data){
  log.push("out: "+data.toString());
});
child.stderr.on('data',function(data){
  var line = data.toString();
  var m = line.match(/thread (\d+): (\d+) hashes, (\d+(:?\.\d+)?) khash\/s/);
  if(m){
    cores[parseInt(m[1])]={nhashes:parseInt(m[2]),speed: parseFloat(m[3])};
  }else{
    log.push('Err: ' + line);
  }
  updateSpeed();
});

child.on('close',function(code){
  console.log(bin,'Exited with code:',code);
  updateSpeed();
});