This script is a simple Cordova hook to incremente Version number each time you build.

increment_version.js

#!/usr/bin/env node
// This script increments patch number (mayor.minor.patch) but you can
// choose to increment any other segment by modifying lines `45` to `53`.
//
// 1. Make sure you've installed *xml2js*: `$ npm install xml2js -D`
// 2. Save this file under `project_root/hooks/before_prepare/`
// 3. Done!

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

// Read config.xml
fs.readFile('config.xml', 'utf8', function (err, data) {
  if (err) {
    return console.log(err);
  }

  // Get XML
  var xml = data;

  // Parse XML to JS Obj
  xml2js.parseString(xml, function (err, result) {
    if (err) {
      return console.log(err);
    }

    // Get version inside widget attributes or create it
    var obj = result;
    var version = obj['widget']['$']['version'];
    if (!version) version = "0.1";

    var mayor = version.split('.')[0];
    var minor = version.split('.')[1];
    var patch = version.split('.')[2];

    // Add missing segments.
    minor = minor ? minor : '0';
    patch = patch ? patch : '0';

    // ----------------------------------------------------
    // Increment patch: you can change it to incremente
    // the segment you prefer: mayor, minor or patch
    // ----------------------------------------------------
   
    // To increment patch
    patchNum = parseInt(patch);
    patchNum++;
    patch = patchNum.toString();
  
    // Uncomment to increment minor 
    /*minorNum = parseInt(minor);
    minorNum++;
    minor = minorNum.toString();*/

    // Join segments into string
    version = [mayor, minor, patch].join('.');

    obj['widget']['$']['version'] = version;

    // Build XML from JS Obj
    var builder = new xml2js.Builder();
    var xml = builder.buildObject(obj);

    // Write config.xml
    fs.writeFile('config.xml', xml, function (err) {
      if (err) {
        return console.log(err);
      }

      console.log('Version incremented to %s', version);
    });

  });
});