avoid unnecessary read of trust.log

Backend/File.hs

@@ -52,7 +52,7 @@ dummyStore _ _ = return True
  - and copy it to here. -}
 copyKeyFile :: Key -> FilePath -> Annex Bool
 copyKeyFile key file = do
-	(remotes, _) <- Remote.keyPossibilities key
+	remotes <- Remote.keyPossibilities key
 	if null remotes
 		then do
 			showNote "not available"
@@ -95,7 +95,7 @@ checkRemoveKey key numcopiesM = do
 	if force || numcopiesM == Just 0
 		then return True
 		else do
-			(remotes, trusteduuids) <- Remote.keyPossibilities key
+			(remotes, trusteduuids) <- Remote.keyPossibilitiesTrusted key
 			untrusteduuids <- trustGet UnTrusted
 			let tocheck = Remote.remotesWithoutUUID remotes (trusteduuids++untrusteduuids)
 			numcopies <- getNumCopies numcopiesM

Command/Move.hs

@@ -89,7 +89,7 @@ toPerform dest move key = do
 	let fastcheck = fast && not move && not (Remote.hasKeyCheap dest)
 	isthere <- if fastcheck
 		then do
-			(remotes, _) <- Remote.keyPossibilities key
+			remotes <- Remote.keyPossibilities key
 			return $ Right $ dest `elem` remotes
 		else Remote.hasKey dest key
 	case isthere of
@@ -123,7 +123,7 @@ fromStart :: Remote.Remote Annex -> Bool -> CommandStartString
 fromStart src move file = isAnnexed file $ \(key, _) -> do
 	g <- Annex.gitRepo
 	u <- getUUID g
-	(remotes, _) <- Remote.keyPossibilities key
+	remotes <- Remote.keyPossibilities key
 	if (u == Remote.uuid src) || (null $ filter (== src) remotes)
 		then stop
 		else do

Remote.hs

@@ -15,6 +15,7 @@ module Remote (
 	hasKey,
 	hasKeyCheap,
 	keyPossibilities,
+	keyPossibilitiesTrusted,
 	forceTrust,
 
 	remoteTypes,
@@ -127,13 +128,30 @@ remotesWithUUID rs us = filter (\r -> uuid r `elem` us) rs
 remotesWithoutUUID :: [Remote Annex] -> [UUID] -> [Remote Annex]
 remotesWithoutUUID rs us = filter (\r -> uuid r `notElem` us) rs
 
+{- Cost ordered lists of remotes that the LocationLog indicate may have a key.
+ -}
+keyPossibilities :: Key -> Annex [Remote Annex]
+keyPossibilities key = do
+	g <- Annex.gitRepo
+	u <- getUUID g
+
+	-- get uuids of all remotes that are recorded to have the key
+	uuids <- keyLocations key
+	let validuuids = filter (/= u) uuids
+
+	-- remotes that match uuids that have the key
+	allremotes <- genList
+	let validremotes = remotesWithUUID allremotes validuuids
+
+	return $ sort validremotes
+
 {- Cost ordered lists of remotes that the LocationLog indicate may have a key.
  -
  - Also returns a list of UUIDs that are trusted to have the key
  - (some may not have configured remotes).
  -}
-keyPossibilities :: Key -> Annex ([Remote Annex], [UUID])
-keyPossibilities key = do
+keyPossibilitiesTrusted :: Key -> Annex ([Remote Annex], [UUID])
+keyPossibilitiesTrusted key = do
 	g <- Annex.gitRepo
 	u <- getUUID g
 	trusted <- trustGet Trusted

debian/changelog

@@ -5,7 +5,6 @@ git-annex (3.20110611) UNRELEASED; urgency=low
   * merge: New subcommand. Auto-merges the new git-annex branch.
   * Improved handling of bare git repos with annexes. Many more commands will
     work in them.
-  * Sped up many commands.
   * git-annex is now more robust; it will never leave state files
     uncommitted when some other git process comes along and locks the index
     at an inconvenient time.