var xcode = require ('xcode'),
    fs = require('fs'),
    projectpath='HelloWorld.xcodeproj/projec.pbxproj',
    myProj = xcode.project(projectPath);

myproj.parse(function(err){
    myProj.addResourceFile('manisha-rules-camdo.plist');
        fs.writeFileSync(projectPath, myProj.writeSync());
    console.log('new project written');
});

module.js:340
    throw err;
          ^
Error: Cannot find module 'xcode'
    at Function.Module._resolveFilename (module.js:338:15)
    at Function.Module._load (module.js:280:25)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (/Users/NileshAgrawal/Desktop/sample-cordova/hello/platforms/ios/sample1.js:1:81)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)