Ionic 2 auto-upgrade app version

upgrade-version.js

/*
 * Instructions:
 * -------------
 * 
 * 1) Run npm install xml2js --save
 * 
 * 2) Add in the script section if your package.json
 * "scripts": {
 *   "clean": "ionic-app-scripts clean",
 *   "build": "ionic-app-scripts build",
 *   "lint": "ionic-app-scripts lint",
 *   "ionic:build": "ionic-app-scripts build",
 *   "ionic:serve": "ionic-app-scripts serve",
 *   "upgrade-version": "node upgrade-version.js"
 * }
 * 
 * 3) Create a upgrade-version.js in the root of the project
 * 
 * 4) Paste the code below
 */

var fs = require('fs');
var xml2js = require('xml2js');
var parser = new xml2js.Parser();
var builder = new xml2js.Builder();
var version;

fs.readFile(__dirname + '/config.xml', function(err, data) {
    parser.parseString(data, function (err, result) {
      if (err) {
        return console.log(err);
      }

      version = result['widget']['$'].version;
      console.log("Actual version:" + version);
      let versionSplit = version.split('.');
      let newVersion = versionSplit[0] + '.' + versionSplit[1] + '.' + (parseInt(versionSplit[2]) + 1);
      console.log("New version:" + newVersion);
      
      result['widget']['$'].version = newVersion;
      let xml = builder.buildObject(result);
      fs.writeFile('config.xml', xml, function(err) {
        if (err) {
          return console.log(err);
        }

        console.log("config.xml file updated: " + newVersion);
      });
    });
});