Deploy to multiple environments on Nodejitsu with the same application

deploy.js

// Nodejitsu multiple environment deploy
// 
// Prerequisits:
// Jitsu deploy CLI
// 
// Usage:
// Include this file in root of project along with configured 
// jitsu_conf.json file
// Run by calling:
// node deploy [ENV]

var fs = require('fs');
var child_process = require('child_process');
var tty = require('tty');
var backup_pkg = './package.json.BAK';

// Helper
var copyFileSync = function(srcFile, destFile, encoding) {
  var content = fs.readFileSync(srcFile, encoding);
  fs.writeFileSync(destFile, content, encoding);
};

// Get the stuff
var pkg = require('./package.json');
var config = require('./jitsu_conf.json');

// Create temp copy of package.json
copyFileSync('./package.json', backup_pkg, 'utf-8');

// Deploy env argument
var env = process.argv[2];

// Set params
for (var key in config[env]) {
  pkg[key] = config[env][key];
}

// Write temp package.json for deploy
fs.writeFile('./package.json', JSON.stringify(pkg, null, 4), function (err) {
  // Write error
  if (err) {
    throw err;
  }

  // Run the deploy process
  var runner = child_process.spawn('jitsu', [ 'deploy' ]);

  // Process STDIN
  function inData(c) {
    runner.stdin.write(c);
  }

  // Process STDOUT
  function outData(c) {
    process.stdout.write(c);
  }

  process.stdin.resume();
  process.stdin.on('data', inData);
  runner.stdout.on('data', outData);
  tty.setRawMode(true);

  // On complete
  runner.on('exit', function(code) {
    tty.setRawMode(false);
    process.stdin.pause();
    process.stdin.removeListener('data', inData);
    runner.stdout.removeListener('data', outData);

    // Get original package.json
    var backup = fs.readFileSync(backup_pkg);
    // Re-Write original package.json
    fs.writeFile('./package.json', backup, function (err) {
      if (err) {
        console.log('ERROR: Could not reset package.json');
      } else {
        // Remove backup
        fs.unlinkSync(backup_pkg);
      }
    });
  });
});

jitsu_conf.json

{
  "dev": {
    "name": "myapp-dev",
    "subdomain": "myapp-dev",
    "domains": [
      "myapp-dev.com"
    ]
  },
  "test": {
    "name": "myapp-test",
    "subdomain": "myapp-test",
    "domains": [
      "myapp-test.com"
    ]
  },
  "prod": {
    "name": "myapp-prod",
    "subdomain": "myapp-prod",
    "domains": [
      "myapp-prod.com"
    ]
  }
}