Upgrade to league/flysystem V3

[razvanphp]

https://flysystem.thephpleague.com/docs/upgrade-from-1.x/
https://flysystem.thephpleague.com/docs/what-is-new/

Can we do this without breaking everything? Would be nice to keep this extension alive.

I can work on the PR, but a little afraid without unit tests....

Thanks!
R

[schmunk42]

@eluhr @handcode You worked with Flysystem lately, WDYT?

[royalrex]

I'd like to see this happen too - and can help out with a PR.

As I read the code, there is not much to do, other than just update the dependency. All code around flysystem and S3 is external:
https://github.com/creocoder/yii2-flysystem/blob/master/src/AwsS3Filesystem.php#L126

This means, that such a package update will be a breaking change. I wonder if it would be an idea to create a small wrapper that maps the old methods to the new (as described in the upgrade guide) and give deprecation warnings when they are used?

[schmunk42]

@royalrex @razvanphp PRs welcome, we are not very actively developing this extension anymore to be honest.