Stylistic changes to scaffolded main

yesod/scaffold/main.hs.cg

@@ -15,44 +15,54 @@ import Yesod.Logger (makeLogger)
 main :: IO ()
 main = do
     logger <- makeLogger
-    args <- cmdArgs argConfig
-    env <- getAppEnv args
+    args   <- cmdArgs argConfig
+    env    <- getAppEnv args
     config <- loadConfig env
-    let c = if (port args) /= 0 then config {appPort = (port args) } else config
+    let c = if port args /= 0
+            then config { appPort = port args }
+            else config
+
 #if PRODUCTION
     with~sitearg~ c logger $ run (appPort c)
 #else
     logString logger $ (show env) ++ " application launched, listening on port " ++ show (appPort c)
     with~sitearg~ c logger $ run (appPort c) . debugHandle (logHandle logger)
     flushLogger logger
-  where
-    logHandle logger msg = logLazyText logger msg >> flushLogger logger
+
+    where
+        logHandle logger msg = logLazyText logger msg >> flushLogger logger
 #endif
 
-data ArgConfig = ArgConfig {environment :: String, port :: Int}
-                 deriving (Show, Data, Typeable)
+data ArgConfig = ArgConfig
+    { environment :: String
+    , port        :: Int
+    } deriving (Show, Data, Typeable)
 
 argConfig :: ArgConfig
-argConfig = ArgConfig{ environment = def 
-  &= help ("application environment, one of: " ++ (foldl1 (\a b -> a ++ ", " ++ b) environments))
-  &= typ "ENVIRONMENT"
-  ,port = def &= typ "PORT"
-}
+argConfig = ArgConfig
+    { environment = def 
+        &= help ("application environment, one of: " ++ (foldl1 (\a b -> a ++ ", " ++ b) environments))
+        &= typ "ENVIRONMENT"
+    , port = def
+        &= typ "PORT"
+    }
 
 environments :: [String]
 environments = map ((map toLower) . show) ([minBound..maxBound] :: [AppEnvironment])
 
 -- | retrieve the -e environment option
-getAppEnv :: ArgConfig ->  IO AppEnvironment
+getAppEnv :: ArgConfig -> IO AppEnvironment
 getAppEnv cfg = do
-    let e = if (environment cfg) /= "" then (environment cfg)
+    let e = if environment cfg /= ""
+            then environment cfg
             else
 #if PRODUCTION
-                  "production"
+                "production"
 #else
-                  "development"
+                "development"
 #endif
     return $ read $ capitalize e
-  where
-    capitalize [] = []
-    capitalize (x:xs) = toUpper x : map toLower xs
+
+    where
+        capitalize [] = []
+        capitalize (x:xs) = toUpper x : map toLower xs