record transfers for git-annex-shell

Not yet tested and places git-annex-shell is run need to be modified to
pass the new field settings.

Note that rsyncServerSend was changed to fork, rather than directly exec
rsync, because it needs to keep the transfer lock held, and clean up the
transfer log when done.

Command/SendKey.hs

@@ -1,6 +1,6 @@
 {- git-annex command
  -
- - Copyright 2010 Joey Hess <joey@kitenet.net>
+ - Copyright 2010,2012 Joey Hess <joey@kitenet.net>
  -
  - Licensed under the GNU GPL version 3 or higher.
  -}
@@ -11,6 +11,7 @@ import Common.Annex
 import Command
 import Annex.Content
 import Utility.RsyncFile
+import Logs.Transfer
 
 def :: [Command]
 def = [oneShot $ command "sendkey" paramKey seek
@@ -20,9 +21,12 @@ seek :: [CommandSeek]
 seek = [withKeys start]
 
 start :: Key -> CommandStart
-start key = do
-	file <- inRepo $ gitAnnexLocation key
-	whenM (inAnnex key) $
-		liftIO $ rsyncServerSend file -- does not return
-	warning "requested key is not present"
-	liftIO exitFailure
+start key = ifM (inAnnex key)
+	( fieldTransfer Upload key $ do
+		file <- inRepo $ gitAnnexLocation key
+		liftIO $ ifM (rsyncServerSend file)
+			( exitSuccess , exitFailure )
+	, do
+		warning "requested key is not present"
+		liftIO exitFailure
+	)