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    <h3>Editing: XmlDescriptor.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;

/**
 * XML descriptor.
 *
 * @author Jean-François Simon &lt;contact@jfsimon.fr&gt;
 *
 * @internal
 */
class XmlDescriptor extends Descriptor
{
    public function getInputDefinitionDocument(InputDefinition $definition): \DOMDocument
    {
        $dom = new \DOMDocument('1.0', 'UTF-8');
        $dom-&gt;appendChild($definitionXML = $dom-&gt;createElement('definition'));

        $definitionXML-&gt;appendChild($argumentsXML = $dom-&gt;createElement('arguments'));
        foreach ($definition-&gt;getArguments() as $argument) {
            $this-&gt;appendDocument($argumentsXML, $this-&gt;getInputArgumentDocument($argument));
        }

        $definitionXML-&gt;appendChild($optionsXML = $dom-&gt;createElement('options'));
        foreach ($definition-&gt;getOptions() as $option) {
            $this-&gt;appendDocument($optionsXML, $this-&gt;getInputOptionDocument($option));
        }

        return $dom;
    }

    public function getCommandDocument(Command $command, bool $short = false): \DOMDocument
    {
        $dom = new \DOMDocument('1.0', 'UTF-8');
        $dom-&gt;appendChild($commandXML = $dom-&gt;createElement('command'));

        $commandXML-&gt;setAttribute('id', $command-&gt;getName());
        $commandXML-&gt;setAttribute('name', $command-&gt;getName());
        $commandXML-&gt;setAttribute('hidden', $command-&gt;isHidden() ? 1 : 0);

        $commandXML-&gt;appendChild($usagesXML = $dom-&gt;createElement('usages'));

        $commandXML-&gt;appendChild($descriptionXML = $dom-&gt;createElement('description'));
        $descriptionXML-&gt;appendChild($dom-&gt;createTextNode(str_replace(&quot;\n&quot;, &quot;\n &quot;, $command-&gt;getDescription())));

        if ($short) {
            foreach ($command-&gt;getAliases() as $usage) {
                $usagesXML-&gt;appendChild($dom-&gt;createElement('usage', $usage));
            }
        } else {
            $command-&gt;mergeApplicationDefinition(false);

            foreach (array_merge([$command-&gt;getSynopsis()], $command-&gt;getAliases(), $command-&gt;getUsages()) as $usage) {
                $usagesXML-&gt;appendChild($dom-&gt;createElement('usage', $usage));
            }

            $commandXML-&gt;appendChild($helpXML = $dom-&gt;createElement('help'));
            $helpXML-&gt;appendChild($dom-&gt;createTextNode(str_replace(&quot;\n&quot;, &quot;\n &quot;, $command-&gt;getProcessedHelp())));

            $definitionXML = $this-&gt;getInputDefinitionDocument($command-&gt;getDefinition());
            $this-&gt;appendDocument($commandXML, $definitionXML-&gt;getElementsByTagName('definition')-&gt;item(0));
        }

        return $dom;
    }

    public function getApplicationDocument(Application $application, ?string $namespace = null, bool $short = false): \DOMDocument
    {
        $dom = new \DOMDocument('1.0', 'UTF-8');
        $dom-&gt;appendChild($rootXml = $dom-&gt;createElement('symfony'));

        if ('UNKNOWN' !== $application-&gt;getName()) {
            $rootXml-&gt;setAttribute('name', $application-&gt;getName());
            if ('UNKNOWN' !== $application-&gt;getVersion()) {
                $rootXml-&gt;setAttribute('version', $application-&gt;getVersion());
            }
        }

        $rootXml-&gt;appendChild($commandsXML = $dom-&gt;createElement('commands'));

        $description = new ApplicationDescription($application, $namespace, true);

        if ($namespace) {
            $commandsXML-&gt;setAttribute('namespace', $namespace);
        }

        foreach ($description-&gt;getCommands() as $command) {
            $this-&gt;appendDocument($commandsXML, $this-&gt;getCommandDocument($command, $short));
        }

        if (!$namespace) {
            $rootXml-&gt;appendChild($namespacesXML = $dom-&gt;createElement('namespaces'));

            foreach ($description-&gt;getNamespaces() as $namespaceDescription) {
                $namespacesXML-&gt;appendChild($namespaceArrayXML = $dom-&gt;createElement('namespace'));
                $namespaceArrayXML-&gt;setAttribute('id', $namespaceDescription['id']);

                foreach ($namespaceDescription['commands'] as $name) {
                    $namespaceArrayXML-&gt;appendChild($commandXML = $dom-&gt;createElement('command'));
                    $commandXML-&gt;appendChild($dom-&gt;createTextNode($name));
                }
            }
        }

        return $dom;
    }

    /**
     * {@inheritdoc}
     */
    protected function describeInputArgument(InputArgument $argument, array $options = [])
    {
        $this-&gt;writeDocument($this-&gt;getInputArgumentDocument($argument));
    }

    /**
     * {@inheritdoc}
     */
    protected function describeInputOption(InputOption $option, array $options = [])
    {
        $this-&gt;writeDocument($this-&gt;getInputOptionDocument($option));
    }

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

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

    /**
     * {@inheritdoc}
     */
    protected function describeApplication(Application $application, array $options = [])
    {
        $this-&gt;writeDocument($this-&gt;getApplicationDocument($application, $options['namespace'] ?? null, $options['short'] ?? false));
    }

    /**
     * Appends document children to parent node.
     */
    private function appendDocument(\DOMNode $parentNode, \DOMNode $importedParent)
    {
        foreach ($importedParent-&gt;childNodes as $childNode) {
            $parentNode-&gt;appendChild($parentNode-&gt;ownerDocument-&gt;importNode($childNode, true));
        }
    }

    /**
     * Writes DOM document.
     */
    private function writeDocument(\DOMDocument $dom)
    {
        $dom-&gt;formatOutput = true;
        $this-&gt;write($dom-&gt;saveXML());
    }

    private function getInputArgumentDocument(InputArgument $argument): \DOMDocument
    {
        $dom = new \DOMDocument('1.0', 'UTF-8');

        $dom-&gt;appendChild($objectXML = $dom-&gt;createElement('argument'));
        $objectXML-&gt;setAttribute('name', $argument-&gt;getName());
        $objectXML-&gt;setAttribute('is_required', $argument-&gt;isRequired() ? 1 : 0);
        $objectXML-&gt;setAttribute('is_array', $argument-&gt;isArray() ? 1 : 0);
        $objectXML-&gt;appendChild($descriptionXML = $dom-&gt;createElement('description'));
        $descriptionXML-&gt;appendChild($dom-&gt;createTextNode($argument-&gt;getDescription()));

        $objectXML-&gt;appendChild($defaultsXML = $dom-&gt;createElement('defaults'));
        $defaults = \is_array($argument-&gt;getDefault()) ? $argument-&gt;getDefault() : (\is_bool($argument-&gt;getDefault()) ? [var_export($argument-&gt;getDefault(), true)] : ($argument-&gt;getDefault() ? [$argument-&gt;getDefault()] : []));
        foreach ($defaults as $default) {
            $defaultsXML-&gt;appendChild($defaultXML = $dom-&gt;createElement('default'));
            $defaultXML-&gt;appendChild($dom-&gt;createTextNode($default));
        }

        return $dom;
    }

    private function getInputOptionDocument(InputOption $option): \DOMDocument
    {
        $dom = new \DOMDocument('1.0', 'UTF-8');

        $dom-&gt;appendChild($objectXML = $dom-&gt;createElement('option'));
        $objectXML-&gt;setAttribute('name', '--'.$option-&gt;getName());
        $pos = strpos($option-&gt;getShortcut() ?? '', '|');
        if (false !== $pos) {
            $objectXML-&gt;setAttribute('shortcut', '-'.substr($option-&gt;getShortcut(), 0, $pos));
            $objectXML-&gt;setAttribute('shortcuts', '-'.str_replace('|', '|-', $option-&gt;getShortcut()));
        } else {
            $objectXML-&gt;setAttribute('shortcut', $option-&gt;getShortcut() ? '-'.$option-&gt;getShortcut() : '');
        }
        $objectXML-&gt;setAttribute('accept_value', $option-&gt;acceptValue() ? 1 : 0);
        $objectXML-&gt;setAttribute('is_value_required', $option-&gt;isValueRequired() ? 1 : 0);
        $objectXML-&gt;setAttribute('is_multiple', $option-&gt;isArray() ? 1 : 0);
        $objectXML-&gt;appendChild($descriptionXML = $dom-&gt;createElement('description'));
        $descriptionXML-&gt;appendChild($dom-&gt;createTextNode($option-&gt;getDescription()));

        if ($option-&gt;acceptValue()) {
            $defaults = \is_array($option-&gt;getDefault()) ? $option-&gt;getDefault() : (\is_bool($option-&gt;getDefault()) ? [var_export($option-&gt;getDefault(), true)] : ($option-&gt;getDefault() ? [$option-&gt;getDefault()] : []));
            $objectXML-&gt;appendChild($defaultsXML = $dom-&gt;createElement('defaults'));

            if (!empty($defaults)) {
                foreach ($defaults as $default) {
                    $defaultsXML-&gt;appendChild($defaultXML = $dom-&gt;createElement('default'));
                    $defaultXML-&gt;appendChild($dom-&gt;createTextNode($default));
                }
            }
        }

        if ($option-&gt;isNegatable()) {
            $dom-&gt;appendChild($objectXML = $dom-&gt;createElement('option'));
            $objectXML-&gt;setAttribute('name', '--no-'.$option-&gt;getName());
            $objectXML-&gt;setAttribute('shortcut', '');
            $objectXML-&gt;setAttribute('accept_value', 0);
            $objectXML-&gt;setAttribute('is_value_required', 0);
            $objectXML-&gt;setAttribute('is_multiple', 0);
            $objectXML-&gt;appendChild($descriptionXML = $dom-&gt;createElement('description'));
            $descriptionXML-&gt;appendChild($dom-&gt;createTextNode('Negate the &quot;--'.$option-&gt;getName().'&quot; option'));
        }

        return $dom;
    }
}
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