Adding an S3 filesystem for Bolt

boltS3.php

<?php
use Aws\S3\S3Client;
use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\AwsS3 as Adapter;

$client = S3Client::factory(array(
    'key'    => '[your key]',
    'secret' => '[your secret]',
    'region' => '[aws-region]'
));

$adapter = new Adapter($client, 'bucket-name', 'optional-prefix');
$filesystem = new Filesystem($adapter);

// Then with Bolt App
$app['filesystem']->mountFilesystem('s3fs', $filesystem);