auto
 ?÷     ckage%s [<comment>yes</comment>]? ',
            1 === count($packages) ? '' : 's'
        ))) {
            return $packages;
        }

        throw new \RuntimeException('Installation aborted.');
    }

    /**
     * @param string $constraint
     * @return Link
     */
    private function appendConstraintToLink(Link $link, $constraint)
    {
        $parser = new VersionParser;
        $oldPrettyString = $link->getConstraint()->getPrettyString();
        $newConstraint = MultiConstraint::create(array($link->getConstraint(), $parser->parseConstraints($constraint)));
        $newConstraint->setPrettyString($oldPrettyString.', '.$constraint);

        return new Link(
            $link->getSource(),
            $link->getTarget(),
            $newConstraint,
            /** @phpstan-ignore-next-line */
            $link->getDescription(),
            $link->getPrettyConstraint() . ', ' . $constraint
        );
    }
}
<?php

/*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Composer\Command;

use Composer\Pcre\Preg;
use Composer\Util\Filesystem;
use Composer\Util\Platform;
use Composer\Util\Silencer;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Composer\Config;
use Composer\Config\JsonConfigSource;
use Composer\Factory;
use Composer\IO\IOInterface;
use Composer\Json\JsonFile;
use Composer\Semver\VersionParser;
use Composer\Package\BasePackage;

/**
 * @author Joshua Estes <Joshua.Estes@iostudio.com>
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class ConfigCommand extends BaseCommand
{
    /**
     * @var Config
     */
    protected $config;

    /**
     * @var JsonFile
     */
    protected $configFile;

    /**
     * @var JsonConfigSource
     */
    protected $configSource;

    /**
     * @var JsonFile
     */
    protected $authConfigFile;

    /**
     * @var JsonConfigSource
     */
    protected $authConfigSource;

    /**
     * @return void
     */
    protected function configure()
    {
        $this
            ->setName('config')
            ->setDescription('Sets config options.')
            ->setDefinition(array(
                new InputOption('global', 'g', InputOption::VALUE_NONE, 'Apply command to the global config file'),
                new InputOption('editor', 'e', InputOption::VALUE_NONE, 'Open editor'),
                new InputOption('auth', 'a', InputOption::VALUE_NONE, 'Affect auth config file (only used for --editor)'),
                new InputOption('unset', null, InputOption::VALUE_NONE, 'Unset the given setting-key'),
                new InputOption('list', 'l', InputOption::VALUE_NONE, 'List configuration settings'),
                new InputOption('file', 'f', InputOption::VALUE_REQUIRED, 'If you want to choose a different composer.json or config.json'),
                new InputOption('absolute', null, InputOption::VALUE_NONE, 'Returns absolute paths when fetching *-dir config values instead of relative'),
                new InputOption('json', 'j', InputOption::VALUE_NONE, 'JSON decode the setting value, to be used with extra.* keys'),
                new InputOption('merge', 'm', InputOption::VALUE_NONE, 'Merge the setting value with the current value, to be used with extra.* keys in combination with --json'),
                new InputOption('append', null, InputOption::VALUE_NONE, 'When adding a repository, append it (lowest priority) to the existing ones instead of prepending it (highest priority)'),
                new InputOption('source', null, InputOption::VALUE_NONE, 'Display where the config value is loaded from'),
                new InputArgument('setting-key', null, 'Setting key'),
                new InputArgument('setting-value', InputArgument::IS_ARRAY, 'Setting