DownloadCommand.php

<?php
namespace Demo;

use League\Flysystem\Filesystem;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Helper\ProgressBar;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class DownloadCommand extends Command
{
    /**
     * @var \Symfony\Component\Console\Helper\ProgressBar
     */
    private $progressBar;

    /**
     * @var \Symfony\Component\Console\Output\OutputInterface
     */
    private $output;

    /**
     * @var \League\Flysystem\Filesystem
     */
    private $files;

    /**
     * @param \League\Flysystem\Filesystem $files
     */
    public function __construct(Filesystem $files)
    {
        $this->files = $files;
        parent::__construct();
    }

    /**
     * Configure method.
     */
    public function configure()
    {
        $this->setName('download:file');
        $this->setDescription('Give a source file name and a destination file name and we\'ll beam it over');
        $this->addArgument('source', InputArgument::REQUIRED, 'Source file');
        $this->addArgument('destination', InputArgument::REQUIRED, 'Destination file name');
    }

    /**
     * @param \Symfony\Component\Console\Input\InputInterface $input
     * @param \Symfony\Component\Console\Output\OutputInterface $output
     *
     * @return int|null
     */
    public function execute(InputInterface $input, OutputInterface $output)
    {
        $this->output = $output;

        // Create stream context.
        $context = stream_context_create([], ['notification' => [$this, 'progress']]);

        // Pipe file.
        $resource = fopen($input->getArgument('source'), 'r', null, $context);
        $this->files->putStream($input->getArgument('destination'), $resource);

        // End output.
        $this->progressBar->finish();
        $this->output->writeln('finished');
    }

    /**
     * @param int $notificationCode
     * @param int $severity
     * @param string $message
     * @param int $messageCode
     * @param int $bytesTransferred
     * @param int $bytesMax
     */
    public function progress($notificationCode, $severity, $message, $messageCode, $bytesTransferred, $bytesMax)
    {
        if (STREAM_NOTIFY_REDIRECTED === $notificationCode) {
            $this->progressBar->clear();
            $this->progressBar = null;
            return;
        }

        if (STREAM_NOTIFY_FILE_SIZE_IS === $notificationCode) {
            if ($this->progressBar) {
                $this->progressBar->clear();
            }
            $this->progressBar = new ProgressBar($this->output, $bytesMax);
        }

        if (STREAM_NOTIFY_PROGRESS === $notificationCode) {
            if (is_null($this->progressBar)) {
                $this->progressBar = new ProgressBar($this->output);
            }
            $this->progressBar->setProgress($bytesTransferred);
        }

        if (STREAM_NOTIFY_COMPLETED === $notificationCode) {
            $this->finish($bytesTransferred);
        }
    }
}

Thank you!