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    <h3>Editing: JsonDescriptor.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Console\Descriptor;

use Symfony\Component\Console\Application;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\InputOption;

/**
 * JSON descriptor.
 *
 * @author Jean-François Simon &lt;contact@jfsimon.fr&gt;
 *
 * @internal
 */
class JsonDescriptor extends Descriptor
{
    /**
     * {@inheritdoc}
     */
    protected function describeInputArgument(InputArgument $argument, array $options = [])
    {
        $this-&gt;writeData($this-&gt;getInputArgumentData($argument), $options);
    }

    /**
     * {@inheritdoc}
     */
    protected function describeInputOption(InputOption $option, array $options = [])
    {
        $this-&gt;writeData($this-&gt;getInputOptionData($option), $options);
        if ($option-&gt;isNegatable()) {
            $this-&gt;writeData($this-&gt;getInputOptionData($option, true), $options);
        }
    }

    /**
     * {@inheritdoc}
     */
    protected function describeInputDefinition(InputDefinition $definition, array $options = [])
    {
        $this-&gt;writeData($this-&gt;getInputDefinitionData($definition), $options);
    }

    /**
     * {@inheritdoc}
     */
    protected function describeCommand(Command $command, array $options = [])
    {
        $this-&gt;writeData($this-&gt;getCommandData($command, $options['short'] ?? false), $options);
    }

    /**
     * {@inheritdoc}
     */
    protected function describeApplication(Application $application, array $options = [])
    {
        $describedNamespace = $options['namespace'] ?? null;
        $description = new ApplicationDescription($application, $describedNamespace, true);
        $commands = [];

        foreach ($description-&gt;getCommands() as $command) {
            $commands[] = $this-&gt;getCommandData($command, $options['short'] ?? false);
        }

        $data = [];
        if ('UNKNOWN' !== $application-&gt;getName()) {
            $data['application']['name'] = $application-&gt;getName();
            if ('UNKNOWN' !== $application-&gt;getVersion()) {
                $data['application']['version'] = $application-&gt;getVersion();
            }
        }

        $data['commands'] = $commands;

        if ($describedNamespace) {
            $data['namespace'] = $describedNamespace;
        } else {
            $data['namespaces'] = array_values($description-&gt;getNamespaces());
        }

        $this-&gt;writeData($data, $options);
    }

    /**
     * Writes data as json.
     */
    private function writeData(array $data, array $options)
    {
        $flags = $options['json_encoding'] ?? 0;

        $this-&gt;write(json_encode($data, $flags));
    }

    private function getInputArgumentData(InputArgument $argument): array
    {
        return [
            'name' =&gt; $argument-&gt;getName(),
            'is_required' =&gt; $argument-&gt;isRequired(),
            'is_array' =&gt; $argument-&gt;isArray(),
            'description' =&gt; preg_replace('/\s*[\r\n]\s*/', ' ', $argument-&gt;getDescription()),
            'default' =&gt; \INF === $argument-&gt;getDefault() ? 'INF' : $argument-&gt;getDefault(),
        ];
    }

    private function getInputOptionData(InputOption $option, bool $negated = false): array
    {
        return $negated ? [
            'name' =&gt; '--no-'.$option-&gt;getName(),
            'shortcut' =&gt; '',
            'accept_value' =&gt; false,
            'is_value_required' =&gt; false,
            'is_multiple' =&gt; false,
            'description' =&gt; 'Negate the &quot;--'.$option-&gt;getName().'&quot; option',
            'default' =&gt; false,
        ] : [
            'name' =&gt; '--'.$option-&gt;getName(),
            'shortcut' =&gt; $option-&gt;getShortcut() ? '-'.str_replace('|', '|-', $option-&gt;getShortcut()) : '',
            'accept_value' =&gt; $option-&gt;acceptValue(),
            'is_value_required' =&gt; $option-&gt;isValueRequired(),
            'is_multiple' =&gt; $option-&gt;isArray(),
            'description' =&gt; preg_replace('/\s*[\r\n]\s*/', ' ', $option-&gt;getDescription()),
            'default' =&gt; \INF === $option-&gt;getDefault() ? 'INF' : $option-&gt;getDefault(),
        ];
    }

    private function getInputDefinitionData(InputDefinition $definition): array
    {
        $inputArguments = [];
        foreach ($definition-&gt;getArguments() as $name =&gt; $argument) {
            $inputArguments[$name] = $this-&gt;getInputArgumentData($argument);
        }

        $inputOptions = [];
        foreach ($definition-&gt;getOptions() as $name =&gt; $option) {
            $inputOptions[$name] = $this-&gt;getInputOptionData($option);
            if ($option-&gt;isNegatable()) {
                $inputOptions['no-'.$name] = $this-&gt;getInputOptionData($option, true);
            }
        }

        return ['arguments' =&gt; $inputArguments, 'options' =&gt; $inputOptions];
    }

    private function getCommandData(Command $command, bool $short = false): array
    {
        $data = [
            'name' =&gt; $command-&gt;getName(),
            'description' =&gt; $command-&gt;getDescription(),
        ];

        if ($short) {
            $data += [
                'usage' =&gt; $command-&gt;getAliases(),
            ];
        } else {
            $command-&gt;mergeApplicationDefinition(false);

            $data += [
                'usage' =&gt; array_merge([$command-&gt;getSynopsis()], $command-&gt;getUsages(), $command-&gt;getAliases()),
                'help' =&gt; $command-&gt;getProcessedHelp(),
                'definition' =&gt; $this-&gt;getInputDefinitionData($command-&gt;getDefinition()),
            ];
        }

        $data['hidden'] = $command-&gt;isHidden();

        return $data;
    }
}
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