public function findNamespace($namespace)
{
$allNamespaces = $this->getNamespaces();
$expr = preg_replace_callback('{([^:]+|)}', function ($matches) {
return preg_quote($matches[1]) . '[^:]*';
}, $namespace);
$namespaces = preg_grep('{^' . $expr . '}', $allNamespaces);
if (empty($namespaces)) {
$message = sprintf('There are no commands defined in the "%s" namespace.', $namespace);
if ($alternatives = $this->findAlternatives($namespace, $allNamespaces)) {
if (1 == count($alternatives)) {
$message .= "\n\nDid you mean this?\n ";
} else {
$message .= "\n\nDid you mean one of these?\n ";
}
$message .= implode("\n ", $alternatives);
}
throw new CommandNotFoundException($message, $alternatives);
}
$exact = in_array($namespace, $namespaces, true);
if (count($namespaces) > 1 && !$exact) {
throw new CommandNotFoundException(sprintf("The namespace \"%s\" is ambiguous.\nDid you mean one of these?\n%s", $namespace, $this->getAbbreviationSuggestions(array_values($namespaces))), array_values($namespaces));
}
return $exact ? $namespace : reset($namespaces);
}