assistant: Fix one-way assistant->assistant sync in direct mode.

When in direct mode, update the master branch after committing to the
annex/direct/master branch. Also, update the synced/master branch.

This fixes a topology A->B where both A and B are in direct mode and
running the assistant, and a change is made to B. Before this fix, A pulled
the changes from B, but since they were only on the annex/direct/master
branch, it did not merge them.

Note that I considered making the assistant merge the
remotes/B/annex/direct/master, but decided to keep it simple and only merge
the sync branches as before.

Assistant/Sync.hs

@@ -96,7 +96,7 @@ reconnectRemotes notifypushes rs = void $ do
 		=<< fromMaybe [] . M.lookup (Remote.uuid r) . connectRemoteNotifiers
 			<$> getDaemonStatus
 
-{- Updates the local sync branch, then pushes it to all remotes, in
+{- Pushes the local sync branch to all remotes, in
  - parallel, along with the git-annex branch. This is the same
  - as "git annex sync", except in parallel, and will co-exist with use of
  - "git annex sync".
@@ -148,7 +148,6 @@ pushToRemotes' now notifypushes remotes = do
 	go _ _ _ _ [] = return [] -- no remotes, so nothing to do
 	go shouldretry (Just branch) g u rs =  do
 		debug ["pushing to", show rs]
-		liftIO $ Command.Sync.updateBranch (Command.Sync.syncBranch branch) g
 		(succeeded, failed) <- liftIO $ inParallel (push g branch) rs
 		updatemap succeeded []
 		if null failed

Assistant/Threads/Committer.hs

@@ -35,6 +35,7 @@ import qualified Annex
 import Utility.InodeCache
 import Annex.Content.Direct
 import qualified Command.Sync
+import qualified Git.Branch
 
 import Data.Time.Clock
 import Data.Tuple.Utils
@@ -219,7 +220,11 @@ commitStaged = do
 	v <- tryAnnex Annex.Queue.flush
 	case v of
 		Left _ -> return False
-		Right _ -> Command.Sync.commitStaged ""
+		Right _ -> do
+			ok <- Command.Sync.commitStaged ""
+			when ok $
+				Command.Sync.updateSyncBranch =<< inRepo Git.Branch.current
+			return ok
 
 {- OSX needs a short delay after a file is added before locking it down,
  - when using a non-direct mode repository, as pasting a file seems to

Command/Sync.hs

@@ -172,8 +172,13 @@ mergeLocal (Just branch) = go =<< needmerge
 		next $ next $ autoMergeFrom syncbranch (Just branch)
 
 pushLocal :: Maybe Git.Ref -> CommandStart
-pushLocal Nothing = stop
-pushLocal (Just branch) = do
+pushLocal b = do
+	updateSyncBranch b
+	stop
+
+updateSyncBranch :: Maybe Git.Ref -> Annex ()
+updateSyncBranch Nothing = noop
+updateSyncBranch (Just branch) = do
 	-- Update the sync branch to match the new state of the branch
 	inRepo $ updateBranch $ syncBranch branch
 	-- In direct mode, we're operating on some special direct mode
@@ -181,7 +186,6 @@ pushLocal (Just branch) = do
 	-- branch.
 	whenM isDirect $
 		inRepo $ updateBranch $ fromDirectBranch branch
-	stop
 
 updateBranch :: Git.Ref -> Git.Repo -> IO ()
 updateBranch syncbranch g = 

debian/changelog

@@ -1,3 +1,9 @@
+git-annex (5.20140614) UNRELEASED; urgency=medium
+
+  * assistant: Fix one-way assistant->assistant sync in direct mode.
+
+ -- Joey Hess <joeyh@debian.org>  Mon, 16 Jun 2014 11:28:42 -0400
+
 git-annex (5.20140613) unstable; urgency=medium
 
   * Ignore setsid failures.

doc/bugs/failed_sync_with_direct_mode_repo.mdwn

@@ -5,3 +5,5 @@ When a change is made on A, the assistant commits it to annex/direct/master. But
 B notices there is a change, pulls from A. Gets annex/direct/master, but does not merge it into its local branch at all.
 
 [[!tag confirmed]]
+
+> [[fixed|done]] --[[Joey]]