addurl: Added --batch option.

CmdLine/Batch.hs

@@ -12,15 +12,13 @@ import Command
 
 data BatchMode = Batch | NoBatch
 
-batchOption :: Parser BatchMode
-batchOption = flag NoBatch Batch
+parseBatchOption :: Parser BatchMode
+parseBatchOption = flag NoBatch Batch
 	( long "batch"
 	<> help "enable batch mode"
 	)
 
-type Batchable t = BatchMode -> t -> CommandStart
-
--- A Batchable command can run in batch mode, or not.
+-- A batchable command can run in batch mode, or not.
 -- In batch mode, one line at a time is read, parsed, and a reply output to
 -- stdout. In non batch mode, the command's parameters are parsed and
 -- a reply output for each.
@@ -29,7 +27,7 @@ batchable handler parser paramdesc = batchseeker <$> batchparser
   where
 	batchparser = (,,)
 		<$> parser
-		<*> batchOption
+		<*> parseBatchOption
 		<*> cmdParams paramdesc
 	
 	batchseeker (opts, NoBatch, params) = mapM_ (go NoBatch opts) params
@@ -52,3 +50,13 @@ batchable handler parser paramdesc = batchseeker <$> batchparser
 batchBadInput :: BatchMode -> Annex ()
 batchBadInput NoBatch = liftIO exitFailure
 batchBadInput Batch = liftIO $ putStrLn ""
+
+-- Reads lines of batch mode input and passes to the action to handle.
+batchSeek :: (String -> Annex ()) -> Annex ()
+batchSeek a = do
+	mp <- liftIO $ catchMaybeIO getLine
+	case mp of
+		Nothing -> return ()
+		Just p -> do
+			a p
+			batchSeek a