Liip\RMT\Action\UpdateVersionClassAction::updateFile PHP Method

    protected function updateFile($filename)
    {
        $current = Context::getParam('current-version');
        $next = Context::getParam('new-version');
        $content = file_get_contents($filename);
        if (false === strpos($content, $current)) {
            throw new Exception('The version class ' . $filename . " does not contain the current version {$current}");
        }
        if (isset($this->options['pattern'])) {
            $current = str_replace('%version%', $current, $this->options['pattern']);
            $next = str_replace('%version%', $next, $this->options['pattern']);
        }
        $content = str_replace($current, $next, $content);
        if (false === strpos($content, $next)) {
            throw new Exception('The version class ' . $filename . " could not be updated with version {$next}");
        }
        file_put_contents($filename, $content);
    }