Simple command line wrapper for forever.js

for.js

#!/usr/bin/env node

/* Simple wrapper for forever.js */

var exec = require('child_process').exec;

var SCRIPT_NAME = 'app.js';
//var FOREVER = './node_modules/forever/bin/forever'; // installed locally
var FOREVER = 'forever'; // installed globally

var dir = __dirname;
var script = '"' + dir + '/' + SCRIPT_NAME + '"';

var date = dateString();
switch(process.argv[2]) {

  case 'start':
    var command = FOREVER + ' start -p ' + dir +
      ' -l logs/forever_' + date + '.log' +
      ' -o ' + dir + '/logs/out_' + date + '.log' +
      ' -e ' + dir + '/logs/err_' + date + '.log ' +
      script;
    console.log('$ ' + command);
    exec(command, function (err, stdout, stderr) {
      if (err) {
        throw err;
      }
      if (stdout) {
        console.log(stdout);
      }
      if (stderr) {
        console.error(stderr);
      }
    });
    break;

  case 'stop':
    var command = FOREVER + ' stop -p ' + dir + ' ' + script;
    console.log('$ ' + command);
    exec(command, function (err, stdout, stderr) {
      if (err) {
        throw err;
      }
      if(stdout) {
        console.log(stdout);
      }
      if (stderr) {
        console.error(stderr);
      }
    });
    break;

  // doesn't work
  case 'list':
    var command = FOREVER + ' list -p ' + dir + ' ' + script;
    console.log('$ ' + command);
    exec(command, function (err, stdout, stderr) {
      if (err) {
        throw err;
      }
      if(stdout) {
        console.log(stdout);
      }
      if (stderr) {
        console.error(stderr);
      }
    });
    break;

  // delete all log & pid file
  case 'clear':
    var command = 'rm -rf ' + dir + '/logs/* ' + dir + '/pids/* ' + dir + '/sock';
    console.log('$ ' + command);
    exec(command, function (err, stdout, stderr) {
      if (err) {
        throw err;
      }
      if(stdout) {
        console.log(stdout);
      }
      if (stderr) {
        console.error(stderr);
      }
    });
    break;
  // show help
  case 'help':
  case '-h':
  default:
    console.log('# Control "' + SCRIPT_NAME + '" with forever');
    console.log('## usage');
    console.log('  $ npm install -g forever');
    console.log('  $ node eizoku.js <command>');
    console.log('## commands');
    console.log('  start: start "' + SCRIPT_NAME + '"');
    console.log('  stop: stop "' + SCRIPT_NAME + '"');
//    console.log('  list: list "' + SCRIPT_NAME + '"');
    console.log('  clear: delete logs/* pids/*');
    console.log('  help: show this message');
    break;
}

function fillZero(s, n) {
  var zero = '';
  for (var i = 0; i < n; i++) {
    zero += '0';
  }
  return (zero + s).slice(-n);
}

function dateString() {
  var date = new Date();

  var year = date.getFullYear();
  var month = fillZero((date.getMonth() + 1), 2);
  var day = fillZero(date.getDate(), 2);
  var hours = fillZero(date.getHours(), 2);
  var minutes = fillZero(date.getMinutes(), 2);
  var seconds = fillZero(date.getSeconds(), 2);

  return year + '' + month + '' + day + '' + hours + '' + minutes + '' + seconds;
}