connect existing meters to the transfer log for downloads

Most remotes have meters in their implementations of retrieveKeyFile
already. Simply hooking these up to the transfer log makes that information
available. Easy peasy.

This is particularly valuable information for encrypted remotes, which
otherwise bypass the assistant's polling of temp files, and so don't have
good progress bars yet.

Still some work to do here (see progressbars.mdwn changes), but this
is entirely an improvement from the lack of progress bars for encrypted
downloads.

Command/AddUrl.hs

@@ -114,7 +114,7 @@ download url file = do
 			)
 		return $ Backend.URL.fromUrl url size
   	runtransfer dummykey tmp = 
-		Transfer.download webUUID dummykey (Just file) Transfer.forwardRetry $ do
+		Transfer.download webUUID dummykey (Just file) Transfer.forwardRetry $ const $ do
 			liftIO $ createDirectoryIfMissing True (parentDir tmp)
 			downloadUrl [url] tmp
 		

Command/Fsck.hs

@@ -150,9 +150,10 @@ performRemote key file backend numcopies remote =
 			( return True
 			, ifM (Annex.getState Annex.fast)
 				( return False
-				, Remote.retrieveKeyFile remote key Nothing tmp
+				, Remote.retrieveKeyFile remote key Nothing tmp dummymeter
 				)
 			)
+	dummymeter _ = noop
 
 {- To fsck a bare repository, fsck each key in the location log. -}
 withBarePresentKeys :: (Key -> CommandStart) -> CommandSeek

Command/Get.hs

@@ -69,7 +69,7 @@ getKeyFile key file dest = dispatch =<< Remote.keyPossibilities key
 			either (const False) id <$> Remote.hasKey r key
 		| otherwise = return True
 	docopy r continue = do
-		ok <- download (Remote.uuid r) key (Just file) noRetry $ do
+		ok <- download (Remote.uuid r) key (Just file) noRetry $ \p -> do
 			showAction $ "from " ++ Remote.name r
-			Remote.retrieveKeyFile r key (Just file) dest
+			Remote.retrieveKeyFile r key (Just file) dest p
 		if ok then return ok else continue

Command/Move.hs

@@ -144,9 +144,9 @@ fromPerform src move key file = moveLock move key $
 		, handle move =<< go
 		)
   where
-	go = download (Remote.uuid src) key (Just file) noRetry $ do
+	go = download (Remote.uuid src) key (Just file) noRetry $ \p -> do
 		showAction $ "from " ++ Remote.name src
-		getViaTmp key $ Remote.retrieveKeyFile src key (Just file)
+		getViaTmp key $ \t -> Remote.retrieveKeyFile src key (Just file) t p
 	handle _ False = stop -- failed
 	handle False True = next $ return True -- copy complete
 	handle True True = do -- finish moving

Command/TransferKey.hs

@@ -52,8 +52,8 @@ toPerform remote key file = go $
 
 fromPerform :: Remote -> Key -> AssociatedFile -> CommandPerform
 fromPerform remote key file = go $
-	download (uuid remote) key file forwardRetry $
-		getViaTmp key $ Remote.retrieveKeyFile remote key file
+	download (uuid remote) key file forwardRetry $ \p ->
+		getViaTmp key $ \t -> Remote.retrieveKeyFile remote key file t p
 
 go :: Annex Bool -> CommandPerform
 go a = ifM a ( liftIO exitSuccess,  liftIO exitFailure)

Command/TransferKeys.hs

@@ -59,8 +59,8 @@ start readh writeh = do
 				when ok $
 					Remote.logStatus remote key InfoPresent
 				return ok
-		| otherwise = download (Remote.uuid remote) key file forwardRetry $
-			getViaTmp key $ Remote.retrieveKeyFile remote key file
+		| otherwise = download (Remote.uuid remote) key file forwardRetry $ \p ->
+			getViaTmp key $ \t -> Remote.retrieveKeyFile remote key file t p
 
 runRequests
 	:: Handle