more standard names for whenM and unlessM operators

These are defined in ifelse, but it's not currently available and I don't
want to pull in a library for 6 lines of code anyhow.

Also, ifelse sets the fixity to 1, which does not allow >>? error $ ...

GitRepo.hs

@@ -331,7 +331,7 @@ gitCommandLine repo _ = assertLocal repo $ error "internal"
 run :: Repo -> String -> [CommandParam] -> IO ()
 run repo subcommand params = assertLocal repo $
 	boolSystem "git" (gitCommandLine repo ((Param subcommand):params))
-		<|> error $ "git " ++ show params ++ " failed"
+		>>! error $ "git " ++ show params ++ " failed"
 
 {- Runs a git subcommand and returns it output, lazily. 
  -

Remote/Bup.hs

@@ -75,7 +75,7 @@ bupSetup u c = do
 	-- bup init will create the repository.
 	-- (If the repository already exists, bup init again appears safe.)
 	showNote "bup init"
-	bup "init" buprepo [] <|> error "bup init failed"
+	bup "init" buprepo [] >>! error "bup init failed"
 
 	storeBupUUID u buprepo
 
@@ -173,7 +173,7 @@ storeBupUUID u buprepo = do
 			showNote "storing uuid"
 			onBupRemote r boolSystem "git"
 				[Params $ "config annex.uuid " ++ u]
-				<|> error "ssh failed"
+					>>! error "ssh failed"
 		else liftIO $ do
 			r' <- Git.configRead r
 			let olduuid = Git.configGet r' "annex.uuid" ""

Remote/Directory.hs

@@ -63,7 +63,7 @@ directorySetup u c = do
 	let dir = maybe (error "Specify directory=") id $
 		M.lookup "directory" c
 	liftIO $ doesDirectoryExist dir
-		<|> error $ "Directory does not exist: " ++ dir
+		>>! error $ "Directory does not exist: " ++ dir
 	c' <- encryptionSetup c
 
 	-- The directory is stored in git config, not in this remote's

Remote/Rsync.hs

@@ -169,7 +169,7 @@ withRsyncScratchDir a = do
 	return res
 	where
 		nuke d = liftIO $ 
-			doesDirectoryExist d <&> removeDirectoryRecursive d
+			doesDirectoryExist d >>? removeDirectoryRecursive d
 
 rsyncRemote :: RsyncOpts -> [CommandParam] -> Annex Bool
 rsyncRemote o params = do

Utility.hs

@@ -27,9 +27,9 @@ module Utility (
 	myHomeDir,
 	catchBool,
 	whenM,
-	(<&>),
+	(>>?),
 	unlessM,
-	(<|>),
+	(>>!),
 	
 	prop_idempotent_shellEscape,
 	prop_idempotent_shellEscape_multiword,
@@ -271,12 +271,12 @@ whenM c a = c >>= flip when a
 unlessM :: Monad m => m Bool -> m () -> m ()
 unlessM c a = c >>= flip unless a
 
-(<&>) :: Monad m => m Bool -> m () -> m ()
-(<&>) = whenM
+(>>?) :: Monad m => m Bool -> m () -> m ()
+(>>?) = whenM
 
-(<|>) :: Monad m => m Bool -> m () -> m ()
-(<|>) = unlessM
+(>>!) :: Monad m => m Bool -> m () -> m ()
+(>>!) = unlessM
 
 -- low fixity allows eg, foo bar <|> error $ "failed " ++ meep
-infixr 0 <&>
-infixr 0 <|>
+infixr 0 >>?
+infixr 0 >>!