src/Console/ExportCommand.php
protected function parseCommandArguments()
    {
        $this->path = $this->argument('path');
        if (! is_dir($this->path) || ! is_writable($this->path)) {
            throw new \InvalidArgumentException("Path '$this->path' doesn't exist or is not writable.");
        }

        $this->state = strtolower($this->argument('state'));
        if (! in_array($this->state, ['ready', 'buried', 'delayed'])) {
            throw new \InvalidArgumentException("Invalid state '$this->state'.");
        }

        if ($this->argument('count')) {
            if (false === ($this->count = filter_var($this->argument('count'), FILTER_VALIDATE_INT, ['options' => ['min_range' => 1]]))) {
                throw new \InvalidArgumentException('Count should be a positive integer.');
            }
        }
    }
protected function parseCommandArguments()
    {
        $this->path = $this->argument('path');
        if (! is_dir($this->path) || ! is_writable($this->path)) {
            throw new \InvalidArgumentException("Path '$this->path' doesn't exist or is not writable.");
        }

        $this->state = strtolower($this->argument('state'));
        if (! in_array($this->state, ['ready', 'buried', 'delayed'])) {
            throw new \InvalidArgumentException("Invalid state '$this->state'.");
        }

        if ($this->argument('count')) {
            if (false === ($this->count = filter_var($this->argument('count'), FILTER_VALIDATE_INT, ['options' => ['min_range' => 1]]))) {
                throw new \InvalidArgumentException('Count should be a positive integer.');
            }
        }
    }
{@inheritdoc}