RoboFile.php

<?php

use Symfony\Component\Finder\Finder;

/**
 * This is project's console commands configuration for Robo task runner.
 *
 * @see http://robo.li/
 */
class RoboFile extends \Robo\Tasks {
    public function update_copyright() {
        $current_year = strftime("%Y");

        $finder = new Finder();
        $finder->in(['tests', 'www/core', 'www/upgrade'])->name('*.php')->append(['COPYING.txt']);

        foreach($finder as $file) {
            $this->taskReplaceInFile($file)
                ->regex('/Copyright \(C\) Kelvin Mo (\d{4})-(\d{4})(\R)/m')
                ->to('Copyright (C) Kelvin Mo $1-'. $current_year . '$3')
                ->run();
            $this->taskReplaceInFile($file)
                ->regex('/Copyright \(C\) Kelvin Mo (\d{4})(\R)/m')
                ->to('Copyright (C) Kelvin Mo $1-'. $current_year . '$2')
                ->run();
        }
    }
}