avoid unnecessary reading of git-annex branch data when matching on annex.largefiles

This makes git annex clean not look at the git-annex branch at all,
and so speeds it up by 50% or more.

Annex/FileMatcher.hs

@@ -14,7 +14,6 @@ import Limit
 import Utility.Matcher
 import Types.Group
 import Logs.Group
-import Logs.Remote
 import Annex.UUID
 import qualified Annex
 import Types.FileMatcher
@@ -53,8 +52,8 @@ parsedToMatcher parsed = case partitionEithers parsed of
 	([], vs) -> Right $ generate vs
 	(es, _) -> Left $ unwords $ map ("Parse failure: " ++) es
 
-exprParser :: FileMatcher Annex -> FileMatcher Annex -> GroupMap -> M.Map UUID RemoteConfig -> Maybe UUID -> String -> [Either String (Token (MatchFiles Annex))]
-exprParser matchstandard matchgroupwanted groupmap configmap mu expr =
+exprParser :: FileMatcher Annex -> FileMatcher Annex -> Annex GroupMap -> M.Map UUID RemoteConfig -> Maybe UUID -> String -> [Either String (Token (MatchFiles Annex))]
+exprParser matchstandard matchgroupwanted getgroupmap configmap mu expr =
 	map parse $ tokenizeMatcher expr
   where
 	parse = parseToken
@@ -62,12 +61,12 @@ exprParser matchstandard matchgroupwanted groupmap configmap mu expr =
 		matchgroupwanted
 		(limitPresent mu)
 		(limitInDir preferreddir)
-		groupmap
+		getgroupmap
 	preferreddir = fromMaybe "public" $
 		M.lookup "preferreddir" =<< (`M.lookup` configmap) =<< mu
 
-parseToken :: FileMatcher Annex -> FileMatcher Annex -> MkLimit Annex -> MkLimit Annex -> GroupMap -> String -> Either String (Token (MatchFiles Annex))
-parseToken matchstandard matchgroupwanted checkpresent checkpreferreddir groupmap t
+parseToken :: FileMatcher Annex -> FileMatcher Annex -> MkLimit Annex -> MkLimit Annex -> Annex GroupMap -> String -> Either String (Token (MatchFiles Annex))
+parseToken matchstandard matchgroupwanted checkpresent checkpreferreddir getgroupmap t
 	| t `elem` tokens = Right $ token t
 	| t == "standard" = call matchstandard
 	| t == "groupwanted" = call matchgroupwanted
@@ -86,7 +85,7 @@ parseToken matchstandard matchgroupwanted checkpresent checkpreferreddir groupma
 			, ("largerthan", limitSize (>))
 			, ("smallerthan", limitSize (<))
 			, ("metadata", limitMetaData)
-			, ("inallgroup", limitInAllGroup groupmap)
+			, ("inallgroup", limitInAllGroup getgroupmap)
 			]
   where
 	(k, v) = separate (== '=') t
@@ -109,9 +108,12 @@ largeFilesMatcher = go =<< annexLargeFiles <$> Annex.getGitConfig
   where
 	go Nothing = return matchAll
 	go (Just expr) = do
-		gm <- groupMap
-		rc <- readRemoteLog
 		u <- getUUID
+		-- No need to read remote configs, that's only needed for
+		-- inpreferreddir, which is used in preferred content
+		-- expressions but does not make sense in the 
+		-- annex.largefiles expression.
+		let emptyconfig = M.empty
 		either badexpr return $
-			parsedToMatcher $ exprParser matchAll matchAll gm rc (Just u) expr
+			parsedToMatcher $ exprParser matchAll matchAll groupMap emptyconfig (Just u) expr
 	badexpr e = error $ "bad annex.largefiles configuration: " ++ e

Limit.hs

@@ -201,22 +201,22 @@ limitAnything _ _ = return True
 {- Adds a limit to skip files not believed to be present in all
  - repositories in the specified group. -}
 addInAllGroup :: String -> Annex ()
-addInAllGroup groupname = do
-	m <- groupMap
-	addLimit $ limitInAllGroup m groupname
+addInAllGroup groupname = addLimit $ limitInAllGroup groupMap groupname
 
-limitInAllGroup :: GroupMap -> MkLimit Annex
-limitInAllGroup m groupname
-	| S.null want = Right $ const $ const $ return True
-	| otherwise = Right $ \notpresent -> checkKey $ check notpresent
-  where
-	want = fromMaybe S.empty $ M.lookup groupname $ uuidsByGroup m
-	check notpresent key
+limitInAllGroup :: Annex GroupMap -> MkLimit Annex
+limitInAllGroup getgroupmap groupname = Right $ \notpresent mi -> do
+	m <- getgroupmap
+	let want = fromMaybe S.empty $ M.lookup groupname $ uuidsByGroup m
+	if S.null want
+		then return True
 		-- optimisation: Check if a wanted uuid is notpresent.
-		| not (S.null (S.intersection want notpresent))	= return False
-		| otherwise = do
-			present <- S.fromList <$> Remote.keyLocations key
-			return $ S.null $ want `S.difference` present
+		else if not (S.null (S.intersection want notpresent))
+			then return False
+			else checkKey (check want) mi
+  where
+	check want key = do
+		present <- S.fromList <$> Remote.keyLocations key
+		return $ S.null $ want `S.difference` present
 
 {- Adds a limit to skip files not using a specified key-value backend. -}
 addInBackend :: String -> Annex ()

Logs/PreferredContent.hs

@@ -102,7 +102,7 @@ makeMatcher groupmap configmap groupwantedmap u = go True True
 		| null (lefts tokens) = generate $ rights tokens
 		| otherwise = unknownMatcher u
 	  where
-		tokens = exprParser matchstandard matchgroupwanted groupmap configmap (Just u) expr
+		tokens = exprParser matchstandard matchgroupwanted (pure groupmap) configmap (Just u) expr
 		matchstandard
 			| expandstandard = maybe (unknownMatcher u) (go False False)
 				(standardPreferredContent <$> getStandardGroup mygroups)
@@ -133,7 +133,7 @@ checkPreferredContentExpression expr = case parsedToMatcher tokens of
 	Left e -> Just e
 	Right _ -> Nothing
   where
-	tokens = exprParser matchAll matchAll emptyGroupMap M.empty Nothing expr
+	tokens = exprParser matchAll matchAll (pure emptyGroupMap) M.empty Nothing expr
 
 {- Puts a UUID in a standard group, and sets its preferred content to use
  - the standard expression for that group (unless preferred content is