public function getConfigForHost($host)
    {
        $matches = array();
        foreach ($this->configs as $config) {
            if (fnmatch($config['host'], $host)) {
                $matches[] = $config;
            }
        }
        if (count($matches) == 0) {
            throw new RuntimeException("Unable to find configuration for host '{$host}'");
        }
        usort($matches, function ($a, $b) {
            return strlen($a['host']) > strlen($b['host']);
        });
        $result = array();
        foreach ($matches as $match) {
            $result = array_merge($result, $match);
        }
        unset($result['host']);
        if (isset($result['identityfile'])) {
            $result['identityfile'] = $this->processPath($result['identityfile']);
        } else if (file_exists($file = $this->processPath($this->getIdentity()))) {
            $result['identityfile'] = $file;
        }

        return $result;
    }