better exception display

Assistant/Threads/Watcher.hs

@@ -184,7 +184,7 @@ runHandler :: Handler -> FilePath -> Maybe FileStatus -> Assistant ()
 runHandler handler file filestatus = void $ do
 	r <- tryIO <~> handler (normalize file) filestatus
 	case r of
-		Left e -> liftIO $ print e
+		Left e -> liftIO $ warningIO $ show e
 		Right Nothing -> noop
 		Right (Just change) -> do
 			-- Just in case the commit thread is not

Remote/Directory.hs

@@ -114,10 +114,10 @@ prepareStore d chunkconfig k = ifM (checkDiskSpace (Just d) k 0)
 
 store :: FilePath -> ChunkConfig -> Storer
 store d chunkconfig k b p = do
-	void $ liftIO $ tryIO $ createDirectoryIfMissing True tmpdir
+	void $ tryIO $ createDirectoryIfMissing True tmpdir
 	case chunkconfig of
 		LegacyChunks chunksize -> Legacy.store chunksize finalizer k b p tmpdir destdir
-		_ -> flip catchNonAsync (\e -> print e >> return False) $ do
+		_ -> flip catchNonAsync (\e -> warningIO (show e) >> return False) $ do
 			let tmpf = tmpdir </> keyFile k
 			meteredWriteFile p tmpf b
 			finalizer tmpdir destdir

Remote/Helper/Chunked.hs

@@ -77,7 +77,7 @@ numChunks = pred . fromJust . keyChunkNum . fst . nextChunkKeyStream
  -}
 storeChunks :: UUID -> ChunkConfig -> Key -> FilePath -> MeterUpdate -> (Key -> L.ByteString -> MeterUpdate -> IO Bool) -> Annex Bool
 storeChunks u chunkconfig k f p storer = metered (Just p) k $ \meterupdate ->
-	either (\e -> liftIO (print e) >> return False) (go meterupdate)
+	either (\e -> warning (show e) >> return False) (go meterupdate)
 		=<< (liftIO $ tryIO $ L.readFile f)
   where
 	go meterupdate b = case chunkconfig of
@@ -190,7 +190,9 @@ retrieveChunks retriever u chunkconfig encryptor basek basep sink = do
 	ls <- chunkKeys u chunkconfig basek
 	liftIO $ flip catchNonAsync giveup (firstavail ls)
   where
-	giveup e = print e >> return False
+	giveup e = do
+		warningIO (show e)
+		return False
 
 	firstavail [] = return False
 	firstavail ([]:ls) = firstavail ls

Remote/Helper/Chunked/Legacy.hs

@@ -74,7 +74,7 @@ storeChunks key tmp dest storer recorder finalizer = either onerr return
 		finalizer tmp dest
 		return (not $ null stored)
 	onerr e = do
-		print e
+		warningIO (show e)
 		return False
 
 	basef = tmp ++ keyFile key
@@ -105,7 +105,7 @@ storeChunked chunksize dests storer content = either onerr return
 		| otherwise = storechunks sz [] dests content
 		
 	onerr e = do
-		print e
+		warningIO (show e)
 		return []
 	
 	storechunks _ _ [] _ = return [] -- ran out of dests

Remote/WebDAV.hs

@@ -113,7 +113,7 @@ storeHelper :: Remote -> Key -> DavUrl -> DavUser -> DavPass -> L.ByteString ->
 storeHelper r k baseurl user pass b = catchBoolIO $ do
 	mkdirRecursiveDAV tmpurl user pass
 	case chunkconfig of
-		NoChunks -> flip catchNonAsync (\e -> print e >> return False) $ do
+		NoChunks -> flip catchNonAsync (\e -> warningIO (show e) >> return False) $ do
 			storehttp tmpurl b
 			finalizer tmpurl keyurl
 			return True