Cannot build library using `ferry` 0.16.1

[rneswold]

We have a library that uses ferry. An app of ours uses the library but no longer builds due to dependency issues. Our library uses subscriptions and, in trying to use the latest ferry versions, we're not able to build because of version conflicts. A portion of our pubspec.yaml dependencies:

    ferry: ^0.16.1
    gql_http_link: ^1.1.0
    gql_websocket_link: ^2.0.1
    gql_code_builder: ^0.13.0

ferry v0.16.1 pulls in web_socket_channel v3.0.2. For WebSockets, your documentation recommends gql_websocket_link for non-Apollo applications. Unfortunately, web_socket_channel v3.0 wants rxdart v0.28 whereas gql_websocket_link wants rxdart < v0.28.

Does ferry v0.16.1 recommend a different WebSocket package? Does anyone have a set of dependencies to get subscriptions working with the latest ferry?

(We'd stay at the previous version, but a different package the app uses already wants rxdart v0.28, so we thought we'd take the opportunity to update ferry.)

Thanks for any help you can provide!

[knaeckeKami]

Ferry should not depend on web_socket_channel. if it does, that's a bug.

web_socket_channel should only be a dependency of gql_websocket_link.

unfortunately, there have been some issues with upgrading to web_socket_channel 3.0.0, see gql-dart/gql#475

[rneswold]

Ah, you're right! While commenting out various combinations, I found this:

Because ferry >=0.16.1-dev.0+2 depends on rxdart ^0.28.0 and
    gql_websocket_link >=0.3.4-alpha+1659810970399 depends on rxdart >=0.26.0 <0.28.0,
ferry >=0.16.1-dev.0+2 is incompatible with gql_websocket_link >=0.3.4-alpha+1659810970399.

This makes less sense, though, because ferry and gql_websocket_link are projects from the same organization, right?

I guess we'll try to downgrade the other packages and stick with ferry v0.16.0.