Grunt Replace Example

Gruntfile.js

module.exports = function (grunt) {
	// measures the time each task takes
	require('time-grunt')(grunt);
	
	grunt.loadNpmTasks('grunt-replace');
	
	grunt.initConfig({
		// Store your Package file so you can reference its specific data whenever necessary
		pkg: grunt.file.readJSON('package.json'),
		
		replace: {
			asset_version: {
				options: {
					// usePrefix: false,
					patterns: [
						{
							match: /define\('CSS_VERSION\', '([0-9]*)'\)/,
							replacement: function(){
								return "define('CSS_VERSION', '" + (parseInt(arguments[1]) + 1) + "')";
							}
						},
						{
							match: /define\('JS_VERSION\', '([0-9]*)'\)/,
							replacement: function(){
								return "define('JS_VERSION', '" + (parseInt(arguments[1]) + 1) + "')";
							}
						}
					]
				},
				files: [
					{ expand: true, flatten: true, src: ['config.php'], dest: './' }
				]
			}
		}
	});
	
	grunt.registerTask('default', ['replace']);
};