alloy.jmk to bump version on build

alloy.jmk

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

task("pre:compile", function(event, logger) {
	var tiappxml = path.join(event.dir.project, 'tiapp.xml');
	
	var tiapp = fs.readFileSync(tiappxml, {
		encoding : 'utf-8'
	});

    tiapp = tiapp.replace(/(android:versionCode=")([^"]+)(")/, function(match, before, versionCode, after) {
      versionCode = parseInt(versionCode, 10) + 1;

      logger.info('Bumped android:versionCode to: ' + versionCode);

      return before + versionCode + after;
    });

    tiapp = tiapp.replace(/(<key>CFBundleVersion<\/key>\s*<string>)([^<]+)(<\/string>)/mg, function(match, before, CFBundleVersion, after) {
      CFBundleVersion = parseInt(CFBundleVersion, 10) + 1;

      logger.info('Bumped CFBundleVersion to: ' + CFBundleVersion);

      return before + CFBundleVersion + after;
    });

    fs.writeFileSync(tiappxml, tiapp);

	logger.info('building project at ' + event.dir.project);
});

task("post:compile", function(event, logger) {
	logger.info('compile finished!');
});