better avoid switching to direct mode in clone of adjusted branch repo

Annex/AdjustedBranch.hs

@@ -20,6 +20,7 @@ module Annex.AdjustedBranch (
 	adjustToCrippledFileSystem,
 	updateAdjustedBranch,
 	propigateAdjustedCommits,
+	AdjustedClone(..),
 	checkAdjustedClone,
 	isGitVersionSupported,
 	checkVersionSupported,
@@ -539,6 +540,8 @@ diffTreeToTreeItem dti = TreeItem
 	(Git.DiffTree.dstmode dti)
 	(Git.DiffTree.dstsha dti)
 
+data AdjustedClone = InAdjustedClone | NotInAdjustedClone | NeedUpgradeForAdjustedClone
+
 {- Cloning a repository that has an adjusted branch checked out will
  - result in the clone having the same adjusted branch checked out -- but
  - the origbranch won't exist in the clone, nor will the basis.
@@ -547,12 +550,12 @@ diffTreeToTreeItem dti = TreeItem
  - The repository may also need to be upgraded to a new version, if the
  - current version is too old to support adjusted branches. Returns True
  - when this is the case. -}
-checkAdjustedClone :: Annex Bool
+checkAdjustedClone :: Annex AdjustedClone
 checkAdjustedClone = go =<< inRepo Git.Branch.current
   where
-	go Nothing = return False
+	go Nothing = return NotInAdjustedClone
 	go (Just currbranch) = case adjustedToOriginal currbranch of
-		Nothing -> return False
+		Nothing -> return NotInAdjustedClone
 		Just (adj, origbranch) -> do
 			let remotebranch = Git.Ref.underBase "refs/remotes/origin" origbranch
 			let basis@(BasisBranch bb) = basisBranch (originalToAdjusted origbranch adj)
@@ -560,7 +563,10 @@ checkAdjustedClone = go =<< inRepo Git.Branch.current
 				setBasisBranch basis remotebranch
 			unlessM (inRepo $ Git.Ref.exists origbranch) $
 				inRepo $ Git.Branch.update' origbranch remotebranch
-			not <$> versionSupportsUnlockedPointers
+			ifM versionSupportsUnlockedPointers
+				( return InAdjustedClone
+				, return NeedUpgradeForAdjustedClone
+				)
 
 -- git 2.2.0 needed for GIT_COMMON_DIR which is needed
 -- by updateAdjustedBranch to use withWorkTreeRelated.

Annex/Init.hs

@@ -93,8 +93,11 @@ initialize' mversion = do
 	whenM versionSupportsUnlockedPointers $ do
 		configureSmudgeFilter
 		Database.Keys.scanAssociatedFiles
-	whenM checkAdjustedClone $
-		void $ upgrade True
+	v <- checkAdjustedClone
+	case v of
+		NeedUpgradeForAdjustedClone -> void $ upgrade True
+		InAdjustedClone -> return ()
+		NotInAdjustedClone ->
 			ifM (crippledFileSystem <&&> (not <$> isBare))
 				( ifM versionSupportsUnlockedPointers
 					( adjustToCrippledFileSystem