add startingNoMessage

Fixes the last wart in the StartMessage transition. A few commands
include other CommandStart actions that generate output, and
do not themselves need to display a start/end message.

Command.hs

@@ -1,6 +1,6 @@
 {- git-annex command infrastructure
  -
- - Copyright 2010-2016 Joey Hess <id@joeyh.name>
+ - Copyright 2010-2019 Joey Hess <id@joeyh.name>
  -
  - Licensed under the GNU AGPL version 3 or higher.
  -}
@@ -82,6 +82,11 @@ starting msg t a = next (StartMessage msg (mkActionItem t), a)
 startingUsualMessages :: MkActionItem t => String -> t -> CommandPerform -> CommandStart
 startingUsualMessages msg t a = next (StartUsualMessages msg (mkActionItem t), a)
 
+{- When no message should be displayed at start/end, but messages can still 
+ - be displayed when using eg includeCommandAction. -}
+startingNoMessage :: MkActionItem t => t -> CommandPerform -> CommandStart
+startingNoMessage t a = next (StartNoMessage (mkActionItem t), a)
+
 {- For commands that do not display usual start or end messages, 
  - but have some other custom output. -}
 startingCustomOutput :: MkActionItem t => t -> CommandPerform -> CommandStart

Command/Map.hs

@@ -40,7 +40,7 @@ seek :: CmdParams -> CommandSeek
 seek = withNothing (commandAction start)
 
 start :: CommandStart
-start = starting "map" (ActionItemOther Nothing) $ do
+start = startingNoMessage (ActionItemOther Nothing) $ do
 	rs <- combineSame <$> (spider =<< gitRepo)
 
 	umap <- uuidDescMap

Command/Move.hs

@@ -247,7 +247,7 @@ toHereStart removewhen afile key ai = case removewhen of
 	RemoveNever -> stopUnless (not <$> inAnnex key) go
 	RemoveSafe -> go
   where
-	go = startingCustomOutput (OnlyActionOn key ai) $ do
+	go = startingNoMessage (OnlyActionOn key ai) $ do
 		rs <- Remote.keyPossibilities key
 		forM_ rs $ \r ->
 			includeCommandAction $

Command/Sync.hs

@@ -630,7 +630,7 @@ seekSyncContent o rs currbranch = do
 		-- Run syncFile as a command action so file transfers run
 		-- concurrently.
 		let ai = OnlyActionOn k (ActionItemKey k)
-		commandAction $ startingCustomOutput ai $ do
+		commandAction $ startingNoMessage ai $ do
 			whenM (syncFile ebloom rs af k) $
 				void $ liftIO $ tryPutMVar mvar ()
 			next $ return True

Messages.hs

@@ -98,13 +98,14 @@ showStartMessage (StartUsualMessages command ai) = do
 		QuietOutput -> Annex.setOutput NormalOutput
 		_ -> noop
 	showStartMessage (StartMessage command ai)
-showStartMessage (CustomOutput _) = do
-	Annex.setOutput QuietOutput
+showStartMessage (StartNoMessage _) = noop
+showStartMessage (CustomOutput _) = Annex.setOutput QuietOutput
 
 -- Only show end result if the StartMessage is one that gets displayed.
 showEndMessage :: StartMessage -> Bool -> Annex ()
 showEndMessage (StartMessage _ _) = showEndResult
 showEndMessage (StartUsualMessages _ _) = showEndResult
+showEndMessage (StartNoMessage _) = const noop
 showEndMessage (CustomOutput _) = const noop
 
 showNote :: String -> Annex ()

Types/Command.hs

@@ -47,14 +47,18 @@ data StartMessage
 	| StartUsualMessages String ActionItem
 	-- ^ Like StartMessage, but makes sure to enable usual message
 	-- display in case it was disabled by cmdnomessages.
+	| StartNoMessage ActionItem
+	-- ^ Starts, without displaying any message but also without
+	-- disabling display of any of the usual messages.
 	| CustomOutput ActionItem
-	-- ^ Prevents any start, end, or other implicit messages from
+	-- ^ Prevents any start, end, or other usual messages from
 	-- being displayed, letting a command output its own custom format.
 	deriving (Show)
 
 instance MkActionItem StartMessage where
 	mkActionItem (StartMessage _ ai) = ai
 	mkActionItem (StartUsualMessages _ ai) = ai
+	mkActionItem (StartNoMessage ai) = ai
 	mkActionItem (CustomOutput ai) = ai
 
 {- A command is defined by specifying these things. -}