PhpBrew\Command\SelfUpdateCommand::execute PHP Method

    public function execute($branch = 'master')
    {
        global $argv;
        $script = realpath($argv[0]);
        if (!is_writable($script)) {
            throw new Exception("{$script} is not writable.");
        }
        // fetch new version phpbrew
        $this->logger->info("Updating phpbrew {$script} from {$branch}...");
        $url = "https://raw.githubusercontent.com/phpbrew/phpbrew/{$branch}/phpbrew";
        //download to a tmp file first
        $downloader = DownloadFactory::getInstance($this->logger, $this->options, array(DownloadFactory::METHOD_CURL, DownloadFactory::METHOD_WGET));
        //the phar file is large so we prefer the commands rather than extensions.
        $tempFile = $downloader->download($url);
        if ($tempFile === false) {
            throw new RuntimeException('Update Failed', 1);
        }
        chmod($tempFile, 0755);
        //todo we can check the hash here in order to make sure we have download the phar successfully
        //move the tmp file to executable path
        $code = rename($tempFile, $script);
        if ($code === false) {
            //fallback to system move
            $code = system("mv -f {$tempFile}, {$script}");
            if (!$code == 0) {
                throw new RuntimeException('Update Failed', 3);
            }
        }
        $this->logger->info('Version updated.');
        system($script . ' init');
        system($script . ' --version');
    }