Fix -Wall and -Wunused-packages in hlint plugin

Author: jhrcek

haskell-language-server.cabal

@@ -619,21 +619,16 @@ common hlint
     cpp-options: -Dhls_hlint
 
 library hls-hlint-plugin
+  import: warnings
   exposed-modules:    Ide.Plugin.Hlint
   hs-source-dirs:     plugins/hls-hlint-plugin/src
   build-depends:
     , aeson
     , base                  >=4.12    && <5
-    , binary
     , bytestring
     , containers
-    , data-default
     , deepseq
-    , Diff                  ^>=0.4.0
-    , directory
-    , extra
     , filepath
-    , ghc-exactprint        >=0.6.3.4
     , ghcide                == 2.6.0.0
     , hashable
     , hlint                 >= 3.5 && < 3.9
@@ -653,9 +648,6 @@ library hls-hlint-plugin
     , apply-refact
 
   cpp-options:   -DHLINT_ON_GHC_LIB
-  ghc-options:
-    -Wall -Wredundant-constraints -Wno-name-shadowing
-    -Wno-unticked-promoted-constructors
 
   if flag(pedantic)
     ghc-options: -Werror
@@ -666,6 +658,7 @@ library hls-hlint-plugin
     TypeOperators
 
 test-suite hls-hlint-plugin-tests
+  import: warnings
   type:             exitcode-stdio-1.0
   default-language: Haskell2010
   hs-source-dirs:   plugins/hls-hlint-plugin/test

plugins/hls-hlint-plugin/src/Ide/Plugin/Hlint.hs

@@ -16,7 +16,6 @@
 {-# LANGUAGE ScopedTypeVariables       #-}
 {-# LANGUAGE StrictData                #-}
 {-# LANGUAGE TupleSections             #-}
-{-# LANGUAGE TypeApplications          #-}
 {-# LANGUAGE TypeFamilies              #-}
 {-# LANGUAGE ViewPatterns              #-}
 {-# OPTIONS_GHC -Wno-orphans   #-}
@@ -142,8 +141,7 @@ import           Development.IDE.Spans.Pragmas                      (LineSplitTe
                                                                      lineSplitTextEdits,
                                                                      nextPragmaLine)
 import           GHC.Generics                                       (Generic)
-#if MIN_VERSION_apply_refact(0,12,0)
-#else
+#if !MIN_VERSION_apply_refact(0,12,0)
 import           System.Environment                                 (setEnv,
                                                                      unsetEnv)
 #endif

plugins/hls-hlint-plugin/test/Main.hs

@@ -9,17 +9,16 @@ module Main
 
 import           Control.Lens               ((^.))
 import           Control.Monad              (when)
-import           Data.Aeson                 (Value (..), object, toJSON, (.=))
+import           Data.Aeson                 (Value (..), object, (.=))
 import           Data.Functor               (void)
 import           Data.List                  (find)
 import qualified Data.Map                   as Map
 import           Data.Maybe                 (fromJust, isJust)
 import           Data.Row                   ((.+), (.==))
 import qualified Data.Text                  as T
-import           Ide.Plugin.Config          (Config (..), PluginConfig (..))
+import           Ide.Plugin.Config          (Config (..))
 import qualified Ide.Plugin.Config          as Plugin
 import qualified Ide.Plugin.Hlint           as HLint
-import           Ide.Types                  (PluginId)
 import qualified Language.LSP.Protocol.Lens as L
 import           System.FilePath            ((</>))
 import           Test.Hls
@@ -383,10 +382,6 @@ data Point = Point {
   column :: !Int
 }
 
-makePoint line column
-  | line >= 1 && column >= 1 = Point line column
-  | otherwise = error "Line or column is less than 1."
-
 pointToRange :: Point -> Range
 pointToRange Point {..}
   | line <- fromIntegral $ subtract 1 line
@@ -402,10 +397,6 @@ makeCodeActionNotFoundAtString :: Point -> String
 makeCodeActionNotFoundAtString Point {..} =
   "CodeAction not found at line: " <> show line <> ", column: " <> show column
 
-makeCodeActionFoundAtString :: Point -> String
-makeCodeActionFoundAtString Point {..} =
-  "CodeAction found at line: " <> show line <> ", column: " <> show column
-
 ignoreHintGoldenTest :: TestName -> FilePath -> Point -> T.Text -> TestTree
 ignoreHintGoldenTest testCaseName goldenFilename point hintName =
   goldenTest testCaseName goldenFilename point (getIgnoreHintText hintName)
@@ -417,7 +408,7 @@ applyHintGoldenTest testCaseName goldenFilename point hintName = do
 goldenTest :: TestName -> FilePath -> Point -> T.Text -> TestTree
 goldenTest testCaseName goldenFilename point hintText =
   setupGoldenHlintTest testCaseName goldenFilename $ \document -> do
-    waitForDiagnosticsFromSource document "hlint"
+    _ <- waitForDiagnosticsFromSource document "hlint"
     actions <- getCodeActions document $ pointToRange point
     case find ((== Just hintText) . getCodeActionTitle) actions of
       Just (InR codeAction) -> do
@@ -441,7 +432,7 @@ applyHintGoldenResolveTest testCaseName goldenFilename point hintName = do
 goldenResolveTest :: TestName -> FilePath -> Point -> T.Text -> TestTree
 goldenResolveTest testCaseName goldenFilename point hintText =
   setupGoldenHlintResolveTest testCaseName goldenFilename $ \document -> do
-    waitForDiagnosticsFromSource document "hlint"
+    _ <- waitForDiagnosticsFromSource document "hlint"
     actions <- getAndResolveCodeActions document $ pointToRange point
     case find ((== Just hintText) . getCodeActionTitle) actions of
       Just (InR codeAction) -> executeCodeAction codeAction