avoid logging to location log when in a bare repo

This assumes that changes to content in bare repos are made from some
non-bare repo, and that the location log is updated on that side.

That's true for move --from and move --to.

It's *not* true for dropkey and setkey and recvkey. But those are plumbing
level commands, so I guess it's ok to assume that someone running those
in a bare repo knows what they're doing. And git-annex-shell is used to
run those, and if the bare repo is non-local, it needs to be able to use
them even though they cannot update the location log. So this seems
unavoidable.

Command/Move.hs

@@ -51,6 +51,11 @@ showAction :: Bool -> FilePath -> Annex ()
 showAction True file = showStart "move" file
 showAction False file = showStart "copy" file
 
+{- Used to log a change in a remote's having a key. The change is logged
+ - in the local repo, not on the remote. The process of transferring the
+ - key to the remote, or removing the key from it *may* log the change
+ - on the remote, but this cannot be relied on. For example, it's not done
+ - for bare repos. -}
 remoteHasKey :: Git.Repo -> Key -> Bool -> Annex ()
 remoteHasKey remote key present	= do
 	g <- Annex.gitRepo

Content.hs

@@ -23,7 +23,7 @@ import System.IO.Error (try)
 import System.Directory
 import Control.Monad.State (liftIO)
 import System.Path
-import Control.Monad (when, filterM)
+import Control.Monad (when, unless, filterM)
 import System.Posix.Files
 import System.FilePath
 
@@ -54,13 +54,19 @@ calcGitLink file key = do
 	return $ relPathDirToDir (parentDir absfile) 
 			(Git.workTree g) </> ".git" </> annexLocation key
 
-{- Updates the LocationLog when a key's presence changes. -}
+{- Updates the LocationLog when a key's presence changes.
+ -
+ - Note that the LocationLog is not updated in bare repositories.
+ - Operations that change a bare repository should be done from
+ - a non-bare repository, and the LocationLog in that repository be
+ - updated instead. -}
 logStatus :: Key -> LogStatus -> Annex ()
 logStatus key status = do
 	g <- Annex.gitRepo
-	u <- getUUID g
+	unless (Git.repoIsLocalBare g) $ do
-	logfile <- liftIO $ logChange g key u status
+		u <- getUUID g
-	Annex.queue "add" [Param "--"] logfile
+		logfile <- liftIO $ logChange g key u status
+		Annex.queue "add" [Param "--"] logfile
 
 {- Runs an action, passing it a temporary filename to download,
  - and if the action succeeds, moves the temp file into