Cleanup

Setup.hs

@@ -1,2 +1,2 @@
-import Distribution.Simple
+import           Distribution.Simple
 main = defaultMain

demobot.cabal

@@ -34,10 +34,13 @@ library
                      , exceptions
   hs-source-dirs:      src
   default-language:    Haskell2010
+  ghc-options:         -Wall
 
 executable demobot
   main-is:             Main.hs
   other-modules:       Extensions
+                     , Extension.Hello
+                     , AppM
   -- other-extensions:
   build-depends:       base >=4.11 && <4.12
                      , demobot
@@ -49,3 +52,4 @@ executable demobot
                      , exceptions
   hs-source-dirs:      src
   default-language:    Haskell2010
+  ghc-options:         -Wall

release.nix

@@ -9,6 +9,7 @@ let
       ghcid
       cabal-install
       hasktags
+      hlint
       (ghcWithPackages (_: demobot.buildInputs ++ demobot.propagatedBuildInputs))
       nixpkgs.binutils-unwrapped
     ];

src/AppM.hs

@@ -8,7 +8,6 @@ import           Bot.DSL
 import           Control.Monad.Catch  (MonadCatch, MonadThrow)
 import           Control.Monad.Logger
 import           Control.Monad.Trans  (MonadIO, liftIO)
-import           Data.Text            (Text)
 import qualified Data.Text            as T
 import qualified Data.Text.IO         as T
 import qualified Data.Time            as Time
@@ -23,7 +22,7 @@ instance MonadNetwork AppM where
   putMsg Response{..} = liftIO . T.putStrLn $ content
 
 instance MonadData AppM where
-  putData key val = liftIO $ T.putStrLn $ "Would put " <> T.pack key <> " = " <> (T.pack $ show val)
+  putData key val = liftIO $ T.putStrLn $ "Would put " <> T.pack key <> " = " <> T.pack (show val)
   getData key = liftIO (T.putStrLn $ "Would fetch " <> T.pack key) >> return Nothing
 
 instance MonadTime AppM where

src/Bot/Extension.hs

@@ -1,9 +1,9 @@
-{-# Language Safe #-}
-{-# Language RankNTypes #-}
-{-# Language GADTs #-}
+{-# LANGUAGE GADTs      #-}
+{-# LANGUAGE RankNTypes #-}
+{-# LANGUAGE Safe       #-}
 module Bot.Extension where
 
-import Bot.DSL
+import           Bot.DSL
 
 data Extension meta = Extension { act :: forall m. (meta ~ Meta m, MonadExtension m) => Request meta -> m (Maybe (Response meta))
                              , name   :: String }

src/Bot/Lib.hs

@@ -1,7 +1,6 @@
-{-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE Safe                #-}
 {-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE TypeFamilies        #-}
 
 module Bot.Lib where
 
@@ -9,10 +8,9 @@ import           Bot.DSL
 import           Bot.Extension
 import           Bot.Log
 import           Control.Monad       (forever)
-import           Control.Monad.Catch (MonadCatch, SomeException, catch, try)
+import           Control.Monad.Catch (MonadCatch, SomeException, catch)
 import           Data.Maybe          (catMaybes)
 import qualified Data.Text           as T
-import           GHC.Stack
 
 tshow :: Show a => a -> T.Text
 tshow = T.pack . show
@@ -25,5 +23,5 @@ mainLoop extensions = forever $ catch go handleFail
     go :: m ()
     go = do
       msg <- recvMsg
-      responses <- catMaybes <$> mapM (\ext -> (act ext) msg) extensions
+      responses <- catMaybes <$> mapM (`act` msg) extensions
       mapM_ putMsg responses

src/Extension/Hello.hs

@@ -1,11 +1,11 @@
-{-# Language RecordWildCards #-}
-{-# Language OverloadedStrings #-}
-{-# Language ScopedTypeVariables #-}
+{-# LANGUAGE OverloadedStrings   #-}
+{-# LANGUAGE RecordWildCards     #-}
+{-# LANGUAGE ScopedTypeVariables #-}
 module Extension.Hello where
 
-import Bot.Extension
-import Bot.DSL
-import qualified Data.Text as T
+import           Bot.DSL
+import           Bot.Extension
+import qualified Data.Text     as T
 
 extension :: Extension ()
 extension = Extension{..}

src/Extensions.hs

@@ -2,7 +2,6 @@
 
 module Extensions where
 
-import           Bot.DSL
 import           Bot.Extension
 import qualified Extension.Hello as Hello