Forbids exporting everything from a module.

Modules should have hidden implementation details with an explicit API so that the module is used in a proper and controlled way. The users of this module should not have to know about what is inside a module it is using, and they shouldn't need to access its internal details. Therefore, the API should be explicitly defined and ideally as small as possible.

config =
    [ NoExposingEverything.rule
    ]

If you would like to expose everything in your tests, you can configure the rule in the following manner:

config =
    [ NoExposingEverything.rule
        |> Rule.ignoreErrorsForDirectories [ "tests/" ]
    ]

Fail

module A exposing (..)

Success

module A exposing (B(..), C, d)