Upgrade AWS to version 3

[sebastianfeldmann]

The Amazon AWS SDK should be upgraded to version 3.x

[barryvdh]

Why not replace all your custom Sync drivers with Flysystem: https://github.com/thephpleague/flysystem
Supports AWS, Dropbox, (S)FTP, Copy, Rackspace, Local etc. Also supports streams, so you just create an adapter and use Flysystem the same way for all.

use Aws\S3\S3Client;
use League\Flysystem\AwsS3v3\AwsS3Adapter;
use League\Flysystem\Filesystem;

$client = S3Client::factory([
    'credentials' => [
        'key'    => $this->key,
        'secret' => $this->secret,
    ],
    'region' => $this->region,
    'version' => 'latest',
]);

$adapter = new AwsS3Adapter($client, $this->bucket);
$filesystem = new Filesystem($adapter);

$fh = fopen($sourcePath, 'r');
$filesystem->putStream($targetPath, $fh);

[sebastianfeldmann]

I thought about that too, would make things a lot easier.
I hasitaded so far to keep the dependencies and the PHAR file as small as possible. But maybe it's time to do it the "easy" way.

[sebastianfeldmann]

For now I postponed the migration to Flysystem and added support for "pure" AWS sdk version 3.

I think I will add a generic Flysystem Sync in the future so you can handle all file systems supported by Flysystem with one Sync implementation.