Revert "multiple -m"

This reverts commit cee12f6a2f.

This commit broke git-annex init run in a repo that was cloned from a
repo with an adjusted branch checked out.

The problem is that findAdjustingCommit was not able to identify the
commit that created the adjusted branch. It seems that there is an extra
"\n" at the end of the commit message that it does not expect.

Since backwards compatability needs to be maintained, cannot just make
findAdjustingCommit accept it with the "\n". Will have to instead
have one commitTree variant that uses the old method, and use it for
adjusted branch committing.

Command/Import.hs

@@ -1,6 +1,6 @@
 {- git-annex command
  -
- - Copyright 2012-2024 Joey Hess <id@joeyh.name>
+ - Copyright 2012-2021 Joey Hess <id@joeyh.name>
  -
  - Licensed under the GNU AGPL version 3 or higher.
  -}
@@ -70,7 +70,7 @@ data ImportOptions
 		, importToSubDir :: Maybe FilePath
 		, importContent :: Bool
 		, checkGitIgnoreOption :: CheckGitIgnore
-		, messageOption :: [String]
+		, messageOption :: Maybe String
 		}
 
 optParser :: CmdParamsDesc -> Parser ImportOptions
@@ -82,7 +82,7 @@ optParser desc = do
 		)
 	dupmode <- fromMaybe Default <$> optional duplicateModeParser
 	ic <- Command.Add.checkGitIgnoreSwitch
-	message <- many (strOption
+	message <- optional (strOption
 		( long "message" <> short 'm' <> metavar "MSG"
 		<> help "commit message"
 		))
@@ -322,8 +322,8 @@ verifyExisting key destfile (yes, no) = do
 	verifyEnoughCopiesToDrop [] key Nothing needcopies mincopies [] preverified tocheck
 		(const yes) no
 
-seekRemote :: Remote -> Branch -> Maybe TopFilePath -> Bool -> CheckGitIgnore -> [String] -> CommandSeek
-seekRemote remote branch msubdir importcontent ci importmessages = do
+seekRemote :: Remote -> Branch -> Maybe TopFilePath -> Bool -> CheckGitIgnore -> Maybe String -> CommandSeek
+seekRemote remote branch msubdir importcontent ci mimportmessage = do
 	importtreeconfig <- case msubdir of
 		Nothing -> return ImportTree
 		Just subdir ->
@@ -336,7 +336,7 @@ seekRemote remote branch msubdir importcontent ci importmessages = do
 	
 	trackingcommit <- fromtrackingbranch Git.Ref.sha
 	cmode <- annexCommitMode <$> Annex.getGitConfig
-	let importcommitconfig = ImportCommitConfig trackingcommit cmode importmessages'
+	let importcommitconfig = ImportCommitConfig trackingcommit cmode importmessage
 	let commitimport = commitRemote remote branch tb trackingcommit importtreeconfig importcommitconfig
 
 	importabletvar <- liftIO $ newTVarIO Nothing
@@ -353,9 +353,9 @@ seekRemote remote branch msubdir importcontent ci importmessages = do
 				includeCommandAction $ 
 					commitimport imported
   where
-	importmessages'
-		| null importmessages = ["import from " ++ Remote.name remote]
-		| otherwise = importmessages
+	importmessage = fromMaybe 
+		("import from " ++ Remote.name remote)
+		mimportmessage
 
 	tb = mkRemoteTrackingBranch remote branch