Slimmed down dependencies

Yesod/Form.hs

@@ -25,10 +25,9 @@ import Yesod.Handler
 import Control.Applicative hiding (optional)
 import Data.Time (Day)
 import Data.Convertible.Text
-import Data.Attempt
+import Control.Monad.Attempt
 import Data.Maybe (fromMaybe)
 import "transformers" Control.Monad.IO.Class (MonadIO)
-import qualified Safe.Failure
 
 noParamNameError :: String
 noParamNameError = "No param name (miscalling of Yesod.Form library)"
@@ -118,9 +117,9 @@ checkBool = applyForm $ \pv -> Right $ case pv of
 
 checkInteger :: Form ParamValue -> Form Integer
 checkInteger = applyForm $ \pv ->
-    case Safe.Failure.read pv of
-        Nothing -> Left "Invalid integer"
-        Just i -> Right i
+    case reads pv of
+        [] -> Left "Invalid integer"
+        ((i, _):_) -> Right i
 
 -- | Instead of calling 'failure' with an 'InvalidArgs', return the error
 -- messages.

Yesod/Request.hs

@@ -39,7 +39,6 @@ module Yesod.Request
     ) where
 
 import qualified Network.Wai as W
-import Data.Function.Predicate (equals)
 import Yesod.Definitions
 import Web.Encodings
 import qualified Data.ByteString as B
@@ -119,7 +118,10 @@ iothunk = fmap go . newMVar . Left where
 
 -- | All cookies with the given name.
 cookies :: Request -> ParamName -> [ParamValue]
-cookies rr name = map snd . filter (fst `equals` name) . reqCookies $ rr
+cookies rr name =
+    map snd . filter (fst `equals` name) . reqCookies $ rr
+  where
+    equals f x y = f y == x
 
 parseWaiRequest :: W.Request
                 -> [(B.ByteString, B.ByteString)] -- ^ session

yesod.cabal

@@ -37,27 +37,19 @@ library
     else
         Buildable: True
     build-depends:   base >= 4 && < 5,
-                     old-locale >= 1.0.0.1 && < 1.1,
                      time >= 1.1.3 && < 1.2,
-                     wai >= 0.0.0 && < 0.1,
-                     wai-extra >= 0.0.0 && < 0.1,
-                     split >= 0.1.1 && < 0.2,
+                     wai >= 0.2.0 && < 0.3,
+                     wai-extra >= 0.0.0 && < 0.3,
                      authenticate >= 0.6 && < 0.7,
-                     predicates >= 0.1 && < 0.2,
                      bytestring >= 0.9.1.4 && < 0.10,
-                     web-encodings >= 0.2.4 && < 0.3,
+                     web-encodings >= 0.2.4 && < 0.5,
                      data-object >= 0.2.0 && < 0.3,
                      directory >= 1 && < 1.1,
                      transformers >= 0.2.0 && < 0.3,
                      control-monad-attempt >= 0.2.0 && < 0.3,
-                     syb,
                      text >= 0.5 && < 0.8,
                      convertible-text >= 0.2.0 && < 0.3,
-                     data-object-json >= 0.0.0 && < 0.1,
-                     attempt >= 0.2.1 && < 0.3,
                      template-haskell,
-                     failure >= 0.0.0 && < 0.1,
-                     safe-failure >= 0.4.0 && < 0.5,
                      web-routes >= 0.22 && < 0.23,
                      web-routes-quasi >= 0.0 && < 0.1,
                      hamlet >= 0.0 && < 0.1