Fix -Wall and -Wunused-package in gadt plugin (#4008)

* Fix -Wall and -Wunused-package in gadt plugin

* stylish-haskell

Author: jhrcek

plugins/hls-gadt-plugin/hls-gadt-plugin.cabal

@@ -19,7 +19,15 @@ source-repository head
     type:     git
     location: https://github.com/haskell/haskell-language-server.git
 
+common warnings
+  ghc-options:
+    -Wall
+    -Wunused-packages
+    -Wno-name-shadowing
+    -Wno-unticked-promoted-constructors
+
 library
+  import: warnings
   exposed-modules:    Ide.Plugin.GADT
   other-modules:      Ide.Plugin.GHC
 
@@ -31,7 +39,6 @@ library
     , extra
     , ghc
     , ghcide                 == 2.6.0.0
-    , ghc-boot-th
     , ghc-exactprint
     , hls-plugin-api         == 2.6.0.0
     , hls-refactor-plugin
@@ -40,16 +47,12 @@ library
     , mtl
     , text
     , transformers
-    , unordered-containers
 
-  ghc-options:
-    -Wall
-    -Wno-name-shadowing
-    -Wno-unticked-promoted-constructors
   default-language:   Haskell2010
   default-extensions: DataKinds
 
 test-suite tests
+  import: warnings
   type:             exitcode-stdio-1.0
   default-language: Haskell2010
   hs-source-dirs:   test
@@ -60,7 +63,4 @@ test-suite tests
     , filepath
     , hls-gadt-plugin
     , hls-test-utils              == 2.6.0.0
-    , lens
-    , lsp
-    , lsp-test
     , text

plugins/hls-gadt-plugin/src/Ide/Plugin/GADT.hs

@@ -57,7 +57,7 @@ toGADTSyntaxCommandId = "GADT.toGADT"
 -- | A command replaces H98 data decl with GADT decl in place
 toGADTCommand :: PluginId -> CommandFunction IdeState ToGADTParams
 toGADTCommand pId@(PluginId pId') state ToGADTParams{..} = withExceptT handleGhcidePluginError $ do
-    nfp <- withExceptT (GhcidePluginErrors) $ getNormalizedFilePathE uri
+    nfp <- withExceptT GhcidePluginErrors $ getNormalizedFilePathE uri
     (decls, exts) <- getInRangeH98DeclsAndExts state range nfp
     (L ann decl) <- case decls of
         [d] -> pure d
@@ -88,7 +88,7 @@ toGADTCommand pId@(PluginId pId') state ToGADTParams{..} = withExceptT handleGhc
 
 codeActionHandler :: PluginMethodHandler IdeState Method_TextDocumentCodeAction
 codeActionHandler state plId (CodeActionParams _ _ doc range _) = withExceptT handleGhcidePluginError $ do
-    nfp <- withExceptT (GhcidePluginErrors) $ getNormalizedFilePathE (doc ^. L.uri)
+    nfp <- withExceptT GhcidePluginErrors $ getNormalizedFilePathE (doc ^. L.uri)
     (inRangeH98Decls, _) <- getInRangeH98DeclsAndExts state range nfp
     let actions = map (mkAction . printOutputable . tcdLName . unLoc) inRangeH98Decls
     pure $ InL actions
@@ -138,8 +138,8 @@ handleGhcidePluginError = \case
     UnexpectedNumberOfDeclarations nums -> do
         PluginInternalError $ "Expected one declaration but found: " <> T.pack (show nums)
     FailedToFindDataDeclRange ->
-        PluginInternalError $ "Unable to get data decl range"
+        PluginInternalError "Unable to get data decl range"
     PrettyGadtError errMsg ->
-        PluginInternalError $ errMsg
+        PluginInternalError errMsg
     GhcidePluginErrors errors ->
         errors

plugins/hls-gadt-plugin/src/Ide/Plugin/GHC.hs

@@ -5,22 +5,17 @@
 {-# LANGUAGE PatternSynonyms  #-}
 {-# LANGUAGE RankNTypes       #-}
 {-# LANGUAGE RecordWildCards  #-}
-{-# LANGUAGE TupleSections    #-}
 {-# LANGUAGE TypeApplications #-}
 {-# OPTIONS_GHC -Wno-missing-signatures #-}
 {-# OPTIONS_GHC -Wno-overlapping-patterns #-}
 module Ide.Plugin.GHC where
 
 import           Data.Functor                            ((<&>))
 import           Data.List.Extra                         (stripInfix)
-import qualified Data.List.NonEmpty                      as NE
 import qualified Data.Text                               as T
 import           Development.IDE
 import           Development.IDE.GHC.Compat
 import           Development.IDE.GHC.Compat.ExactPrint
-import           Ide.PluginUtils                         (subRange)
-import           Language.Haskell.GHC.ExactPrint.Parsers (parseDecl)
-
 import           GHC.Parser.Annotation                   (AddEpAnn (..),
                                                           Anchor (Anchor),
                                                           AnchorOperation (MovedAnchor),
@@ -30,10 +25,14 @@ import           GHC.Parser.Annotation                   (AddEpAnn (..),
                                                           EpaLocation (EpaDelta),
                                                           SrcSpanAnn' (SrcSpanAnn),
                                                           spanAsAnchor)
+import           Ide.PluginUtils                         (subRange)
+import           Language.Haskell.GHC.ExactPrint         (showAst)
+import           Language.Haskell.GHC.ExactPrint.Parsers (parseDecl)
+
 #if MIN_VERSION_ghc(9,5,0)
+import qualified Data.List.NonEmpty                      as NE
 import           GHC.Parser.Annotation                   (TokenLocation (..))
 #endif
-import           Language.Haskell.GHC.ExactPrint         (showAst)
 
 type GP = GhcPass Parsed
 
@@ -229,4 +228,4 @@ noUsed = EpAnnNotUsed
 pattern UserTyVar' :: LIdP pass -> HsTyVarBndr flag pass
 pattern UserTyVar' s <- UserTyVar _ _ s
 
-implicitTyVars = (wrapXRec @GP mkHsOuterImplicit)
+implicitTyVars = wrapXRec @GP mkHsOuterImplicit