Direct mode .git/annex/objects directories are no longer left writable

Because that allowed writing to symlinks of files that are not present,
which followed the link and put bad content in an object location.

fsck: Fix up .git/annex/object directory permissions.

This commit was sponsored by an anonymous bitcoin donor.

Annex/Content/Direct.hs

@@ -10,6 +10,7 @@ module Annex.Content.Direct (
 	associatedFilesRelative,
 	removeAssociatedFile,
 	removeAssociatedFileUnchecked,
+	removeAssociatedFiles,
 	addAssociatedFile,
 	goodContent,
 	recordedInodeCache,
@@ -64,8 +65,8 @@ changeAssociatedFiles key transform = do
 	files <- associatedFilesRelative key
 	let files' = transform files
 	when (files /= files') $ do
-		createContentDir mapping
-		liftIO $ viaTmp write mapping $ unlines files'
+		modifyContent mapping $
+			liftIO $ viaTmp write mapping $ unlines files'
 	top <- fromRepo Git.repoPath
 	return $ map (top </>) files'
   where
@@ -75,6 +76,13 @@ changeAssociatedFiles key transform = do
  		hPutStr h content
 		hClose h
 
+{- Removes the list of associated files. -}
+removeAssociatedFiles :: Key -> Annex ()
+removeAssociatedFiles key = do
+	mapping <- calcRepo $ gitAnnexMapping key
+	modifyContent mapping $
+		liftIO $ nukeFile mapping
+
 {- Removes an associated file. Returns new associatedFiles value.
  - Checks if this was the last copy of the object, and updates location
  - log. -}
@@ -142,16 +150,16 @@ addInodeCache key cache = do
 
 {- Writes inode cache for a key. -}
 writeInodeCache :: Key -> [InodeCache] -> Annex ()
-writeInodeCache key caches = withInodeCacheFile key $ \f -> do
-	createContentDir f
-	liftIO $ writeFile f $
-		unlines $ map showInodeCache caches
+writeInodeCache key caches = withInodeCacheFile key $ \f -> 
+	modifyContent f $
+		liftIO $ writeFile f $
+			unlines $ map showInodeCache caches
 
 {- Removes an inode cache. -}
 removeInodeCache :: Key -> Annex ()
-removeInodeCache key = withInodeCacheFile key $ \f -> do
-	createContentDir f -- also thaws directory
-	liftIO $ nukeFile f
+removeInodeCache key = withInodeCacheFile key $ \f ->
+	modifyContent f $
+		liftIO $ nukeFile f
 
 withInodeCacheFile :: Key -> (FilePath -> Annex a) -> Annex a
 withInodeCacheFile key a = a =<< calcRepo (gitAnnexInodeCache key)