Remove unused imports and variables

servant-client-core/src/Servant/Client/Core/HasClient.hs

@@ -32,7 +32,6 @@ import           Control.Arrow
                  (left, (+++))
 import           Control.Monad
                  (unless)
-import qualified Data.ByteString as BS
 import qualified Data.ByteString.Lazy as BL
 import           Data.Either
                  (partitionEithers)
@@ -78,7 +77,7 @@ import           Servant.API
                  ReflectMethod (..), RemoteHost, ReqBody', SBoolI, Stream,
                  StreamBody', Summary, ToHttpApiData, ToSourceIO (..), Vault,
                  Verb, WithNamedContext, WithStatus (..), contentType, getHeadersHList,
-                 getResponse, toEncodedUrlPiece, toUrlPiece, NamedRoutes)
+                 getResponse, toEncodedUrlPiece, NamedRoutes)
 import           Servant.API.Generic
                  (GenericMode(..), ToServant, ToServantApi
                  , GenericServant, toServant, fromServant)

servant-client/src/Servant/Client/Internal/HttpClient.hs

@@ -43,14 +43,12 @@ import qualified Data.ByteString             as BS
 import           Data.ByteString.Builder
                  (toLazyByteString)
 import qualified Data.ByteString.Lazy        as BSL
-import           Data.Either
-                 (either)
 import           Data.Foldable
                  (foldl',toList)
 import           Data.Functor.Alt
                  (Alt (..))
 import           Data.Maybe
-                 (maybe, maybeToList)
+                 (maybeToList)
 import           Data.Proxy
                  (Proxy (..))
 import           Data.Sequence
@@ -63,7 +61,7 @@ import           GHC.Generics
 import           Network.HTTP.Media
                  (renderHeader)
 import           Network.HTTP.Types
-                 (hContentType, renderQuery, statusIsSuccessful, urlEncode, Status)
+                 (hContentType, statusIsSuccessful, urlEncode, Status)
 import           Servant.Client.Core
 
 import qualified Network.HTTP.Client         as Client

servant-client/src/Servant/Client/Internal/HttpClient/Streaming.hs

@@ -24,8 +24,6 @@ import           Control.DeepSeq
                  (NFData, force)
 import           Control.Exception
                  (evaluate, throwIO)
-import           Control.Monad
-                 (unless)
 import           Control.Monad.Base
                  (MonadBase (..))
 import           Control.Monad.Codensity

servant-client/test/Servant/StreamSpec.hs

@@ -21,16 +21,9 @@
 
 module Servant.StreamSpec (spec) where
 
-import           Control.Monad
-                 (when)
-import           Control.Monad.Codensity
-                 (Codensity (..))
-import           Control.Monad.IO.Class
-                 (MonadIO (..))
 import           Control.Monad.Trans.Except
 import qualified Data.ByteString               as BS
 import           Data.Proxy
-import qualified Data.TDigest                  as TD
 import qualified Network.HTTP.Client           as C
 import           Prelude ()
 import           Prelude.Compat
@@ -46,20 +39,10 @@ import           System.Entropy
                  (getEntropy, getHardwareEntropy)
 import           System.IO.Unsafe
                  (unsafePerformIO)
-import           System.Mem
-                 (performGC)
 import           Test.Hspec
 import           Servant.ClientTestUtils (Person(..))
 import qualified Servant.ClientTestUtils as CT
 
-#if MIN_VERSION_base(4,10,0)
-import           GHC.Stats
-                 (gc, gcdetails_live_bytes, getRTSStats)
-#else
-import           GHC.Stats
-                 (currentBytesUsed, getGCStats)
-#endif
-
 -- This declaration simply checks that all instances are in place.
 -- Note: this is streaming client
 _ = client comprehensiveAPI
@@ -78,9 +61,9 @@ api :: Proxy StreamApi
 api = Proxy
 
 getGetNL, getGetNS :: ClientM (SourceIO Person)
-getGetALot :: ClientM (SourceIO BS.ByteString)
+_getGetALot :: ClientM (SourceIO BS.ByteString)
 getStreamBody :: SourceT IO BS.ByteString -> ClientM (SourceIO BS.ByteString)
-getGetNL :<|> getGetNS :<|> getGetALot :<|> getStreamBody = client api
+getGetNL :<|> getGetNS :<|> _getGetALot :<|> getStreamBody = client api
 
 alice :: Person
 alice = Person "Alice" 42
@@ -134,50 +117,3 @@ streamSpec = beforeAll (CT.startWaiApp server) $ afterAll CT.endWaiApp $ do
         where
           input = ["foo", "", "bar"]
           output = ["foo", "bar"]
-
-{-
-    it "streams in constant memory" $ \(_, baseUrl) -> do
-        Right rs <- runClient getGetALot baseUrl
-        performGC
-        -- usage0 <- getUsage
-        -- putStrLn $ "Start:  " ++ show usage0
-        tdigest <- memoryUsage $ joinCodensitySourceT rs
-
-        -- putStrLn $ "Median: " ++ show (TD.median tdigest)
-        -- putStrLn $ "Mean:   " ++ show (TD.mean tdigest)
-        -- putStrLn $ "Stddev: " ++ show (TD.stddev tdigest)
-
-        -- forM_ [0.01, 0.1, 0.2, 0.5, 0.8, 0.9, 0.99] $ \q ->
-        --    putStrLn $ "q" ++ show q ++ ": " ++ show (TD.quantile q tdigest)
-
-        let Just stddev = TD.stddev tdigest
-
-        -- standard deviation of 100k is ok, we generate 256M of data after all.
-        -- On my machine deviation is 40k-50k
-        stddev `shouldSatisfy` (< 100000)
-
-memoryUsage :: SourceT IO BS.ByteString -> IO (TD.TDigest 25)
-memoryUsage src = unSourceT src $ loop mempty (0 :: Int)
-  where
-    loop !acc !_ Stop          = return acc
-    loop !_   !_ (Error err)   = fail err -- !
-    loop !acc !n (Skip s)      = loop acc n s
-    loop !acc !n (Effect ms)   = ms >>= loop acc n
-    loop !acc !n (Yield _bs s) =  do
-        usage  <- liftIO getUsage
-        -- We perform GC in between as we generate garbage.
-        when (n `mod` 1024 == 0) $ liftIO performGC
-        loop (TD.insert usage acc) (n + 1) s
-
-getUsage :: IO Double
-getUsage = fromIntegral .
-#if MIN_VERSION_base(4,10,0)
-    gcdetails_live_bytes . gc <$> getRTSStats
-#else
-    currentBytesUsed <$> getGCStats
-#endif
-       memUsed `shouldSatisfy` (< megabytes 22)
-
-megabytes :: Num a => a -> a
-megabytes n = n * (1000 ^ (2 :: Int))
--}

servant-conduit/example/Main.hs

@@ -17,8 +17,6 @@ import           Data.Maybe
                  (fromMaybe)
 import           Network.HTTP.Client
                  (defaultManagerSettings, newManager)
-import           Network.Wai
-                 (Application)
 import           System.Environment
                  (getArgs, lookupEnv)
 import           Text.Read

servant-docs/src/Servant/Docs/Internal.hs

@@ -55,7 +55,7 @@ import           Data.String.Conversions
 import           Data.Text
                  (Text, unpack)
 import           GHC.Generics
-                 (Generic, Rep, K1(K1), M1(M1), U1(U1), V1,
+                 (K1(K1), M1(M1), U1(U1), V1,
                  (:*:)((:*:)), (:+:)(L1, R1))
 import qualified GHC.Generics               as G
 import           GHC.TypeLits
@@ -964,7 +964,7 @@ instance {-# OVERLAPPABLE #-}
 
 instance (ReflectMethod method) =>
          HasDocs (NoContentVerb method) where
-  docsFor Proxy (endpoint, action) DocOptions{..} =
+  docsFor Proxy (endpoint, action) _ =
     single endpoint' action'
 
     where endpoint' = endpoint & method .~ method'
@@ -982,7 +982,7 @@ instance (ReflectMethod method) =>
 instance {-# OVERLAPPABLE #-}
         (Accept ct, KnownNat status, ReflectMethod method)
     => HasDocs (Stream method status framing ct a) where
-  docsFor Proxy (endpoint, action) DocOptions{..} =
+  docsFor Proxy (endpoint, action) _ =
     single endpoint' action'
 
     where endpoint' = endpoint & method .~ method'

servant-machines/example/Main.hs

@@ -17,8 +17,6 @@ import           Data.Void
                  (Void)
 import           Network.HTTP.Client
                  (defaultManagerSettings, newManager)
-import           Network.Wai
-                 (Application)
 import           System.Environment
                  (getArgs, lookupEnv)
 import           Text.Read

servant-pipes/example/Main.hs

@@ -15,8 +15,6 @@ import           Data.Maybe
                  (fromMaybe)
 import           Network.HTTP.Client
                  (defaultManagerSettings, newManager)
-import           Network.Wai
-                 (Application)
 import           System.Environment
                  (getArgs, lookupEnv)
 import           System.IO

servant-server/src/Servant/Server/Internal.hs

@@ -95,8 +95,6 @@ import           Servant.API.TypeErrors
 import           Web.HttpApiData
                  (FromHttpApiData, parseHeader, parseQueryParam, parseUrlPiece,
                  parseUrlPieces)
-import           Data.Kind
-                 (Type)
 
 import           Servant.Server.Internal.BasicAuth
 import           Servant.Server.Internal.Context
@@ -110,7 +108,7 @@ import           Servant.Server.Internal.RoutingApplication
 import           Servant.Server.Internal.ServerError
 
 import           GHC.TypeLits
-                 (ErrorMessage (..), TypeError)
+                 (ErrorMessage (..))
 import           Servant.API.TypeLevel
                  (AtLeastOneFragment, FragmentUnique)
 

servant-swagger/src/Servant/Swagger/Internal.hs

@@ -38,7 +38,6 @@ import           Network.HTTP.Media                     (MediaType)
 import           Servant.API
 import           Servant.API.Description                (FoldDescription,
                                                          reflectDescription)
-import           Servant.API.Generic                    (ToServantApi, AsApi)
 import           Servant.API.Modifiers                  (FoldRequired)
 
 import           Servant.Swagger.Internal.TypeLevel.API

servant/src/Servant/API/TypeErrors.hs

@@ -16,7 +16,6 @@ module Servant.API.TypeErrors (
   NoInstanceForSub,
 ) where
 
-import Data.Kind
 import GHC.TypeLits
 
 -- | No instance exists for @tycls (expr :> ...)@ because