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77 lines
2.3 KiB
Elm
77 lines
2.3 KiB
Elm
module NoExposingEverything exposing (rule)
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{-|
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@docs rule
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-}
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import Elm.Syntax.Exposing as Exposing
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import Elm.Syntax.Module as Module exposing (Module)
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import Elm.Syntax.Node as Node exposing (Node)
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import Review.Rule as Rule exposing (Error, Rule)
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{-| Forbids exporting everything from a module.
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Modules should have hidden implementation details with an explicit API so that the module is used in a proper and controlled way.
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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.
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Therefore, the API should be explicitly defined and ideally as small as possible.
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config =
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[ NoExposingEverything.rule
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]
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If you would like to expose everything in your tests, you can configure the rule
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in the following manner:
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config =
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[ NoExposingEverything.rule
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|> Rule.ignoreErrorsForDirectories [ "tests/" ]
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]
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## Fail
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module A exposing (..)
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## Success
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module A exposing (B(..), C, d)
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## Try it out
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You can try this rule out by running the following command:
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```bash
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elm-review --template jfmengels/elm-review-common/example --rules NoExposingEverything
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```
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-}
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rule : Rule
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rule =
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Rule.newModuleRuleSchema "NoExposingEverything" ()
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|> Rule.withSimpleModuleDefinitionVisitor moduleDefinitionVisitor
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|> Rule.fromModuleRuleSchema
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moduleDefinitionVisitor : Node Module -> List (Error {})
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moduleDefinitionVisitor moduleNode =
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case Module.exposingList <| Node.value moduleNode of
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Exposing.All range ->
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[ Rule.error
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{ message = "Module exposes everything implicitly \"(..)\""
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, details =
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[ "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 it's internal details. Therefore, the API should be explicitly defined and ideally as small as possible."
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]
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}
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{ start = { row = range.start.row, column = range.start.column - 1 }
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, end = { row = range.end.row, column = range.end.column + 1 }
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}
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]
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Exposing.Explicit _ ->
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[]
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