CLI Add an instance to an user for guacamole

guacamole-add-connection.js

var parseString = require('xml2js').parseString
var builder = new (require('xml2js').Builder)()
var fs = require('fs')
var argv = require('optimist')
          .usage('Usage: $0 --input <input.xml> --name <machine-name>')
          .options('hostname', {default: '@host'})
          .options('port', {default: '3389'})
          .options('serverLayout', {default: 'fr-fr-azerty'})
          .options('colorDepth', {default: '16'})
          .demand('name')
          .argv
var filename = argv.input || 'user-mapping.xml'
var xmlFile = fs.readFileSync(filename)
// var inspect = require('util').inspect

parseString(xmlFile, function (err, result) { 
  if (err) throw err
  var connection = { 
    'protocol': [(argv.protocol || 'rdp')],
    'param': [ 
      {'_': (argv.hostname || '@host'), '$': {'name': 'hostname'}},
      {'_': (argv.port || '3389'), '$': {'name': 'port'}},
      {'_': (argv.serverLayout || 'fr-fr-azerty'), '$': {'name': 'server-layout'}},
      {'_': (argv.colorDepth || '16'), '$': {'name': 'color-depth'}}
    ],
    '$': {'name': argv.name}
  } 
  result['user-mapping']['authorize'][0]['connection'][1] = connection
  var xml = builder.buildObject(result)
  console.log(xml)
  fs.writeFileSync(filename, xml)
})