PhpCsFixer\Console\Command\ReadmeCommand::getLatestDownloadUrl PHP Method

    private function getLatestDownloadUrl()
    {
        $version = $this->getApplication()->getVersion();
        $changelogFile = __DIR__ . '/../../../CHANGELOG.md';
        if (is_file($changelogFile)) {
            $currentMajor = (int) $version;
            $changelog = file_get_contents($changelogFile);
            for ($i = $currentMajor; $i > 0; --$i) {
                preg_match('/Changelog for v(' . $i . '.\\d+.\\d+)/', $changelog, $matches);
                if (2 === count($matches)) {
                    $version = $matches[1];
                    break;
                }
            }
            if (null === $version) {
                throw new \RuntimeException('Invalid changelog data!');
            }
        }
        return sprintf('https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases/download/v%s/php-cs-fixer.phar', $version);
    }