pixelfed/app/Console/Commands/MediaGarbageCollector.php

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use App\{Media, Status};
use Carbon\Carbon;

class MediaGarbageCollector extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'media:gc';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Delete media uploads not attached to any active statuses';

    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        $gc = Media::whereNull('status_id')
        ->where('created_at', '<', Carbon::now()->subHours(6)->toDateTimeString())
        ->orderBy('created_at','asc')
        ->take(500)
        ->get();

        foreach($gc as $media) {
            $path = storage_path("app/$media->media_path");
            $thumb = storage_path("app/$media->thumbnail_path");
            if(is_file($path)) {
                unlink($path);
            }
            if(is_file($thumb)) {
                unlink($thumb);
            }
            $media->forceDelete();
        }
    }
}