append extend 8 to android code version.

append_8_to_version_code.js

#!/usr/bin/env node

var path = require('path');
var fs = require('fs');
var xml2js = require('xml2js');
var deferral;

function log(message) {
    console.log(message);
}

function onError(error) {
    log("ERROR: " + error);
    deferral.resolve();
}

function xmlFileToJs(filename, cb) {
  var filepath = path.normalize(path.join(__dirname, filename));
  fs.readFile(filepath, 'utf8', function (err, xmlStr) {
      if (err) throw (err);
      xml2js.parseString(xmlStr, {}, cb);
  });
}

function jsToXmlFile(filename, obj, cb) {
  try {
    var filepath = path.normalize(path.join(__dirname, filename));
    var builder = new xml2js.Builder();
    var xml = builder.buildObject(obj);
    fs.writeFile(filepath, xml, cb);    
  } catch (e) {
      onError("EXCEPTION: " + e.toString());
  } 
}

function run() {
  var androidManifestRPath = '../platforms/android/app/src/main/AndroidManifest.xml';  
  xmlFileToJs(androidManifestRPath, function(error, data) {    
    var config = data;    
    config.manifest.$['android:versionCode'] += '8';
    jsToXmlFile(androidManifestRPath, config, function() {
      deferral.resolve();
    });
  });  
}

function attempt(fn) {
    return function () {
        try {
            fn.apply(this, arguments);
        } catch (e) {
            onError("EXCEPTION: " + e.toString());
        }
    }
}

module.exports = function (ctx) {
    try{
        deferral = require('q').defer();
    }catch(e){
        e.message = 'Unable to load node module dependency \'q\': '+e.message;
        log(e.message);
        throw e;
    }

    attempt(run)();
    return deferral.promise;
};