public static function handle(PackageEvent $event)
    {
        $operation = $event->getOperation();
        if ($operation instanceof InstallOperation) {
            $package = $operation->getPackage();
        } elseif ($operation instanceof UpdateOperation) {
            $package = $operation->getTargetPackage();
        } else {
            return;
        }

        $extra = $package->getExtra();
        if ($package->getType() !== 'bolt-extension' || !isset($extra['bolt-assets'])) {
            return;
        }

        $rootExtra = $event->getComposer()->getPackage()->getExtra();
        if (realpath($rootExtra['bolt-web-path']) === realpath($rootExtra['bolt-root-path'])) {
            return;
        }

        // Copy package assets to main web path
        $src = 'vendor/' . $package->getName() . '/' . $extra['bolt-assets'];
        $dest = $rootExtra['bolt-web-path'] . '/extensions/vendor/' . $package->getName();

        self::mirror($src, $dest, $event);
    }