Clean up a bunch of hlint suggestions

src/Stack/Build.hs

@@ -178,7 +178,7 @@ checkCabalVersion = do
             versionString cabalVer ++
             " was found."
 
-data CabalVersionException = CabalVersionException { unCabalVersionException :: String }
+newtype CabalVersionException = CabalVersionException { unCabalVersionException :: String }
     deriving (Typeable)
 
 instance Show CabalVersionException where show = unCabalVersionException

src/Stack/SDist.hs

@@ -68,7 +68,7 @@ import qualified System.FilePath as FP
 -- | Special exception to throw when you want to fail because of bad results
 -- of package check.
 
-data CheckException
+newtype CheckException
   = CheckException (NonEmpty Check.PackageCheck)
   deriving (Typeable)
 

src/Stack/Types/Build.hs

@@ -367,8 +367,8 @@ newtype PkgDepsOracle =
     deriving (Show,Typeable,Eq,Hashable,Store,NFData)
 
 -- | Stored on disk to know whether the files have changed.
-data BuildCache = BuildCache
-    { buildCacheTimes :: !(Map FilePath FileCacheInfo)
+newtype BuildCache = BuildCache
+    { buildCacheTimes :: Map FilePath FileCacheInfo
       -- ^ Modification times of files.
     }
     deriving (Generic, Eq, Show, Data, Typeable)

src/Stack/Types/Config.hs

@@ -1690,8 +1690,8 @@ explicitSetupDeps name = do
                     Nothing -> False -- default value
 
 -- | Data passed into Docker container for the Docker entrypoint's use
-data DockerEntrypoint = DockerEntrypoint
-    { deUser :: !(Maybe DockerUser)
+newtype DockerEntrypoint = DockerEntrypoint
+    { deUser :: Maybe DockerUser
       -- ^ UID/GID/etc of host user, if we wish to perform UID/GID switch in container
     } deriving (Read,Show)
 

src/Stack/Types/Config/Build.hs

@@ -319,12 +319,12 @@ instance Monoid TestOptsMonoid where
 
 
 -- | Haddock Options
-data HaddockOpts =
-  HaddockOpts { hoAdditionalArgs :: ![String] -- ^ Arguments passed to haddock program
+newtype HaddockOpts =
+  HaddockOpts { hoAdditionalArgs :: [String] -- ^ Arguments passed to haddock program
               } deriving (Eq,Show)
 
-data HaddockOptsMonoid =
-  HaddockOptsMonoid {hoMonoidAdditionalArgs :: ![String]
+newtype HaddockOptsMonoid =
+  HaddockOptsMonoid {hoMonoidAdditionalArgs :: [String]
                     } deriving (Show, Generic)
 
 defaultHaddockOpts :: HaddockOpts

src/Stack/Types/FlagName.hs

@@ -40,7 +40,7 @@ import           Language.Haskell.TH
 import           Language.Haskell.TH.Syntax
 
 -- | A parse fail.
-data FlagNameParseFail
+newtype FlagNameParseFail
   = FlagNameParseFail Text
   deriving (Typeable)
 instance Exception FlagNameParseFail

src/Stack/Types/GhcPkgId.hs

@@ -26,7 +26,7 @@ import           GHC.Generics
 import           Prelude -- Fix AMP warning
 
 -- | A parse fail.
-data GhcPkgIdParseFail
+newtype GhcPkgIdParseFail
   = GhcPkgIdParseFail Text
   deriving Typeable
 instance Show GhcPkgIdParseFail where

src/Stack/Types/Image.hs

@@ -18,8 +18,8 @@ import Path
 import Prelude -- Fix redundant import warnings
 
 -- | Image options. Currently only Docker image options.
-data ImageOpts = ImageOpts
-    { imgDockers :: ![ImageDockerOpts]
+newtype ImageOpts = ImageOpts
+    { imgDockers :: [ImageDockerOpts]
       -- ^ One or more stanzas for docker image settings.
     } deriving (Show)
 
@@ -39,8 +39,8 @@ data ImageDockerOpts = ImageDockerOpts
       -- ^ Filenames of executables to add (if Nothing, add them all)
     } deriving (Show)
 
-data ImageOptsMonoid = ImageOptsMonoid
-    { imgMonoidDockers :: ![ImageDockerOpts]
+newtype ImageOptsMonoid = ImageOptsMonoid
+    { imgMonoidDockers :: [ImageDockerOpts]
     } deriving (Show, Generic)
 
 instance FromJSON (WithJSONWarnings ImageOptsMonoid) where

src/Stack/Types/PackageIdentifier.hs

@@ -35,7 +35,7 @@ import           Stack.Types.PackageName
 import           Stack.Types.Version
 
 -- | A parse fail.
-data PackageIdentifierParseFail
+newtype PackageIdentifierParseFail
   = PackageIdentifierParseFail Text
   deriving (Typeable)
 instance Show PackageIdentifierParseFail where

src/Stack/Types/Version.hs

@@ -57,7 +57,7 @@ import           Prelude -- Fix warning: Word in Prelude from base-4.8.
 import           Text.PrettyPrint (render)
 
 -- | A parse fail.
-data VersionParseFail =
+newtype VersionParseFail =
   VersionParseFail Text
   deriving (Typeable)
 instance Exception VersionParseFail

src/Stack/Upgrade.hs

@@ -88,8 +88,8 @@ data BinaryOpts = BinaryOpts
     , _boGithubRepo :: !(Maybe String)
     }
     deriving Show
-data SourceOpts = SourceOpts
-    { _soRepo :: !(Maybe String)
+newtype SourceOpts = SourceOpts
+    { _soRepo :: Maybe String
     }
     deriving Show
 

src/Stack/Upload.hs

@@ -248,8 +248,8 @@ printBody res = runConduit $ getResponseBody res .| CB.sinkHandle stdout
 -- Typically, you want to use this with 'upload'.
 --
 -- Since 0.1.0.0
-data Uploader = Uploader
-    { upload_ :: !(String -> L.ByteString -> IO ())
+newtype Uploader = Uploader
+    { upload_ :: String -> L.ByteString -> IO ()
     }
 
 -- | Upload a single tarball with the given @Uploader@.

src/System/Process/Read.hs

@@ -423,7 +423,7 @@ getEnvOverride platform =
           mkEnvOverride platform
         . Map.fromList . map (T.pack *** T.pack)
 
-data PathException = PathsInvalidInPath [FilePath]
+newtype PathException = PathsInvalidInPath [FilePath]
     deriving Typeable
 
 instance Exception PathException

src/test/Network/HTTP/Download/VerifiedSpec.hs

@@ -2,14 +2,11 @@
 module Network.HTTP.Download.VerifiedSpec where
 
 import           Control.Applicative
-import           Control.Monad.IO.Class         (MonadIO)
-import           Control.Monad.Logger           (LoggingT, runStdoutLoggingT)
-import           Control.Monad.Trans.Reader
+import           Control.Monad.Logger           (runStdoutLoggingT)
 import           Control.Retry                  (limitRetries)
 import           Crypto.Hash
 import           Data.Maybe
 import           Network.HTTP.Client.Conduit
-import           Network.HTTP.Client.TLS        (getGlobalManager)
 import           Network.HTTP.Download.Verified
 import           Path
 import           Path.IO
@@ -65,76 +62,61 @@ isWrongDigest :: VerifiedDownloadException -> Bool
 isWrongDigest WrongDigest{} = True
 isWrongDigest _ = False
 
-data T = T
-  { manager :: Manager
-  }
-
-runWith :: MonadIO m => Manager -> ReaderT Manager (LoggingT m) r -> m r
-runWith manager = runStdoutLoggingT . flip runReaderT manager
-
-setup :: IO T
-setup = do
-  manager <- getGlobalManager
-  return T{..}
-
-teardown :: T -> IO ()
-teardown _ = return ()
-
 spec :: Spec
-spec = beforeAll setup $ afterAll teardown $ do
+spec = do
   let exampleProgressHook _ = return ()
 
   describe "verifiedDownload" $ do
     -- Preconditions:
     -- * the exampleReq server is running
     -- * the test runner has working internet access to it
-    it "downloads the file correctly" $ \T{..} -> withTempDir' $ \dir -> do
+    it "downloads the file correctly" $ withTempDir' $ \dir -> do
       examplePath <- getExamplePath dir
       doesFileExist examplePath `shouldReturn` False
-      let go = runWith manager $ verifiedDownload exampleReq examplePath exampleProgressHook
+      let go = runStdoutLoggingT $ verifiedDownload exampleReq examplePath exampleProgressHook
       go `shouldReturn` True
       doesFileExist examplePath `shouldReturn` True
 
-    it "is idempotent, and doesn't redownload unnecessarily" $ \T{..} -> withTempDir' $ \dir -> do
+    it "is idempotent, and doesn't redownload unnecessarily" $ withTempDir' $ \dir -> do
       examplePath <- getExamplePath dir
       doesFileExist examplePath `shouldReturn` False
-      let go = runWith manager $ verifiedDownload exampleReq examplePath exampleProgressHook
+      let go = runStdoutLoggingT $ verifiedDownload exampleReq examplePath exampleProgressHook
       go `shouldReturn` True
       doesFileExist examplePath `shouldReturn` True
       go `shouldReturn` False
       doesFileExist examplePath `shouldReturn` True
 
     -- https://github.com/commercialhaskell/stack/issues/372
-    it "does redownload when the destination file is wrong" $ \T{..} -> withTempDir' $ \dir -> do
+    it "does redownload when the destination file is wrong" $ withTempDir' $ \dir -> do
       examplePath <- getExamplePath dir
       let exampleFilePath = toFilePath examplePath
       writeFile exampleFilePath exampleWrongContent
       doesFileExist examplePath `shouldReturn` True
       readFile exampleFilePath `shouldReturn` exampleWrongContent
-      let go = runWith manager $ verifiedDownload exampleReq examplePath exampleProgressHook
+      let go = runStdoutLoggingT $ verifiedDownload exampleReq examplePath exampleProgressHook
       go `shouldReturn` True
       doesFileExist examplePath `shouldReturn` True
       readFile exampleFilePath `shouldNotReturn` exampleWrongContent
 
-    it "rejects incorrect content length" $ \T{..} -> withTempDir' $ \dir -> do
+    it "rejects incorrect content length" $ withTempDir' $ \dir -> do
       examplePath <- getExamplePath dir
       let wrongContentLengthReq = exampleReq
             { drLengthCheck = Just exampleWrongContentLength
             }
-      let go = runWith manager $ verifiedDownload wrongContentLengthReq examplePath exampleProgressHook
+      let go = runStdoutLoggingT $ verifiedDownload wrongContentLengthReq examplePath exampleProgressHook
       go `shouldThrow` isWrongContentLength
       doesFileExist examplePath `shouldReturn` False
 
-    it "rejects incorrect digest" $ \T{..} -> withTempDir' $ \dir -> do
+    it "rejects incorrect digest" $ withTempDir' $ \dir -> do
       examplePath <- getExamplePath dir
       let wrongHashCheck = exampleHashCheck { hashCheckHexDigest = exampleWrongDigest }
       let wrongDigestReq = exampleReq { drHashChecks = [wrongHashCheck] }
-      let go = runWith manager $ verifiedDownload wrongDigestReq examplePath exampleProgressHook
+      let go = runStdoutLoggingT $ verifiedDownload wrongDigestReq examplePath exampleProgressHook
       go `shouldThrow` isWrongDigest
       doesFileExist examplePath `shouldReturn` False
 
     -- https://github.com/commercialhaskell/stack/issues/240
-    it "can download hackage tarballs" $ \T{..} -> withTempDir' $ \dir -> do
+    it "can download hackage tarballs" $ withTempDir' $ \dir -> do
       dest <- (dir </>) <$> parseRelFile "acme-missiles-0.3.tar.gz"
       let req = parseRequest_ "http://hackage.haskell.org/package/acme-missiles-0.3/acme-missiles-0.3.tar.gz"
       let dReq = DownloadRequest
@@ -143,7 +125,7 @@ spec = beforeAll setup $ afterAll teardown $ do
             , drLengthCheck = Nothing
             , drRetryPolicy = limitRetries 1
             }
-      let go = runWith manager $ verifiedDownload dReq dest exampleProgressHook
+      let go = runStdoutLoggingT $ verifiedDownload dReq dest exampleProgressHook
       doesFileExist dest `shouldReturn` False
       go `shouldReturn` True
       doesFileExist dest `shouldReturn` True