Symfony\Component\Console\Descriptor\TextDescriptor::describeInputOption PHP Method

    protected function describeInputOption(InputOption $option, array $options = array())
    {
        if ($option->acceptValue() && null !== $option->getDefault() && (!is_array($option->getDefault()) || count($option->getDefault()))) {
            $default = sprintf('<comment> [default: %s]</comment>', $this->formatDefaultValue($option->getDefault()));
        } else {
            $default = '';
        }
        $value = '';
        if ($option->acceptValue()) {
            $value = '=' . strtoupper($option->getName());
            if ($option->isValueOptional()) {
                $value = '[' . $value . ']';
            }
        }
        $totalWidth = isset($options['total_width']) ? $options['total_width'] : $this->calculateTotalWidthForOptions(array($option));
        $synopsis = sprintf('%s%s', $option->getShortcut() ? sprintf('-%s, ', $option->getShortcut()) : '    ', sprintf('--%s%s', $option->getName(), $value));
        $spacingWidth = $totalWidth - strlen($synopsis);
        $this->writeText(sprintf('  <info>%s</info>  %s%s%s%s', $synopsis, str_repeat(' ', $spacingWidth), preg_replace('/\\s*[\\r\\n]\\s*/', "\n" . str_repeat(' ', $totalWidth + 4), $option->getDescription()), $default, $option->isArray() ? '<comment> (multiple values allowed)</comment>' : ''), $options);
    }