think\console\Input::addLongOption PHP Method

    private function addLongOption($name, $value)
    {
        if (!$this->definition->hasOption($name)) {
            throw new \RuntimeException(sprintf('The "--%s" option does not exist.', $name));
        }
        $option = $this->definition->getOption($name);
        if (false === $value) {
            $value = null;
        }
        if (null !== $value && !$option->acceptValue()) {
            throw new \RuntimeException(sprintf('The "--%s" option does not accept a value.', $name, $value));
        }
        if (null === $value && $option->acceptValue() && count($this->parsed)) {
            $next = array_shift($this->parsed);
            if (isset($next[0]) && '-' !== $next[0]) {
                $value = $next;
            } elseif (empty($next)) {
                $value = '';
            } else {
                array_unshift($this->parsed, $next);
            }
        }
        if (null === $value) {
            if ($option->isValueRequired()) {
                throw new \RuntimeException(sprintf('The "--%s" option requires a value.', $name));
            }
            if (!$option->isArray()) {
                $value = $option->isValueOptional() ? $option->getDefault() : true;
            }
        }
        if ($option->isArray()) {
            $this->options[$name][] = $value;
        } else {
            $this->options[$name] = $value;
        }
    }