Accidentally swapped the files

Main.hs

@@ -1,2 +1,44 @@
-import Distribution.Simple
+import Control.Monad
-main = defaultMain
+import Data.Char            (toLower)
+import Text.Printf          (printf)
+import Crypto.Hash.SHA1     (hash)
+import System.Environment   (getArgs)
+import System.Directory
+import System.FilePath.Posix
+import qualified Data.ByteString as B
+
+getDirectoryFiles :: FilePath -> IO [FilePath]
+getDirectoryFiles path =
+  map (path </>) <$> getDirectoryContents path >>= filterM doesFileExist
+
+fileHash :: FilePath -> IO String
+fileHash = fmap (hex . hash) . B.readFile
+
+hex :: B.ByteString -> String
+hex bytes = B.unpack bytes >>= printf "%02X"
+
+
+newName :: FilePath -> IO FilePath
+newName path = do
+  hash <- take 10 <$> fileHash path
+  let (file, ext) = splitExtension path
+      (dir, base) = splitFileName  file
+      new = dir </> hash <.> map toLower ext
+  if null base
+    then return path
+    else return new
+
+main = do
+  args <- getArgs
+  path <- case args of
+    []  -> getCurrentDirectory
+    x:_ -> return x
+  putStrLn ("Renaming files in " ++ path)
+  files <- getDirectoryFiles path
+  names <- mapM newName files
+  forM (zip files names) $ \(x, y) -> do
+    let x' = takeFileName x
+        y' = takeFileName y
+    putStrLn (printf "%s -> %s" x' y')
+    renameFile x y
+  putStrLn "Files renamed successfully"

Setup.hs

@@ -1,44 +1,2 @@
-import Control.Monad
+import Distribution.Simple
-import Data.Char            (toLower)
+main = defaultMain
-import Text.Printf          (printf)
-import Crypto.Hash.SHA1     (hash)
-import System.Environment   (getArgs)
-import System.Directory
-import System.FilePath.Posix
-import qualified Data.ByteString as B
-
-getDirectoryFiles :: FilePath -> IO [FilePath]
-getDirectoryFiles path =
-  map (path </>) <$> getDirectoryContents path >>= filterM doesFileExist
-
-fileHash :: FilePath -> IO String
-fileHash = fmap (hex . hash) . B.readFile
-
-hex :: B.ByteString -> String
-hex bytes = B.unpack bytes >>= printf "%02X"
-
-
-newName :: FilePath -> IO FilePath
-newName path = do
-  hash <- take 10 <$> fileHash path
-  let (file, ext) = splitExtension path
-      (dir, base) = splitFileName  file
-      new = dir </> hash <.> map toLower ext
-  if null base
-    then return path
-    else return new
-
-main = do
-  args <- getArgs
-  path <- case args of
-    []  -> getCurrentDirectory
-    x:_ -> return x
-  putStrLn ("Renaming files in " ++ path)
-  files <- getDirectoryFiles path
-  names <- mapM newName files
-  forM (zip files names) $ \(x, y) -> do
-    let x' = takeFileName x
-        y' = takeFileName y
-    putStrLn (printf "%s -> %s" x' y')
-    renameFile x y
-  putStrLn "Files renamed successfully"