public static function loadFromFile($file)
{
$yaml = Yaml::parse(file_get_contents($file));
$configuration = new Configuration(ProviderManager::fromDefaults());
if (isset($yaml['parameters'])) {
$parameters = $yaml['parameters'];
} else {
$parameters = array();
}
if (isset($yaml['hosts'])) {
foreach ($yaml['hosts'] as $host => $hostData) {
if (!isset($hostData['provider'])) {
throw new InvalidHostException('No provider key set.', $host);
}
$providerId = $hostData['provider'];
unset($hostData['provider']);
$hostData = self::replacePlaceholders($hostData, $parameters);
$configuration->addHost($host, $providerId, $hostData);
}
}
return $configuration;
}
