git annex init works on Windows!

git hash-object and cat-file both only use \n at ends of line, even on Windows.

Git/CatFile.hs

@@ -59,6 +59,9 @@ catObjectDetails h object = CoProcess.query h send receive
 		hPutStrLn to $ show object
 	receive from = do
 		fileEncoding from
+#ifdef __WINDOWS__
+		hSetNewlineMode from noNewlineTranslation
+#endif
 		header <- hGetLine from
 		case words header of
 			[sha, objtype, size]
@@ -73,13 +76,10 @@ catObjectDetails h object = CoProcess.query h send receive
 				| otherwise -> error $ "unknown response from git cat-file " ++ show (header, object)
 	readcontent bytes from sha = do
 		content <- S.hGet from bytes
-#ifdef __WINDOWS__
-		eatchar '\r' from
-#endif
 		eatchar '\n' from
 		return $ Just (L.fromChunks [content], Ref sha)
 	dne = return Nothing
 	eatchar expected from = do
 		c <- hGetChar from
 		when (c /= expected) $
-			error $ "missing " ++ (show c) ++ " from git cat-file"
+			error $ "missing " ++ (show expected) ++ " from git cat-file"

Git/HashObject.hs

@@ -5,6 +5,8 @@
  - Licensed under the GNU GPL version 3 or higher.
  -}
 
+{-# LANGUAGE CPP #-}
+
 module Git.HashObject where
 
 import Common
@@ -32,8 +34,15 @@ hashFile h file = CoProcess.query h send receive
   where
 	send to = do
 		fileEncoding to
+#ifdef __WINDOWS__
+		hSetNewlineMode to noNewlineTranslation
+#endif
 		hPutStrLn to file
-	receive from = getSha "hash-object" $ hGetLine from
+	receive from = getSha "hash-object" $ do
+#ifdef __WINDOWS__
+		hSetNewlineMode from noNewlineTranslation
+#endif
+		hGetLine from
 
 {- Injects some content into git, returning its Sha. -}
 hashObject :: ObjectType -> String -> Repo -> IO Sha