vendor/illuminate/database/Console/Seeds/SeedCommand.php

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<?php

namespace Illuminate\Database\Console\Seeds;

use Illuminate\Console\Command;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Console\ConfirmableTrait;
use Symfony\Component\Console\Input\InputOption;
use Illuminate\Database\ConnectionResolverInterface as Resolver;

class SeedCommand extends Command
{
    use ConfirmableTrait;

    /**
     * The console command name.
     *
     * @var string
     */
    protected $name = 'db:seed';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Seed the database with records';

    /**
     * The connection resolver instance.
     *
     * @var \Illuminate\Database\ConnectionResolverInterface
     */
    protected $resolver;

    /**
     * Create a new database seed command instance.
     *
     * @param  \Illuminate\Database\ConnectionResolverInterface  $resolver
     * @return void
     */
    public function __construct(Resolver $resolver)
    {
        parent::__construct();

        $this->resolver = $resolver;
    }

    /**
     * Execute the console command.
     *
     * @return void
     */
    public function handle()
    {
        if (! $this->confirmToProceed()) {
            return;
        }

        $this->resolver->setDefaultConnection($this->getDatabase());