better memoize core.sharedrepository handling

It was memoized, but that was not used consistently. Move it to
Types.GitConfig so it will auto-memoize.

Annex.hs

@@ -42,7 +42,6 @@ import Annex.Fixup
 import Git.CatFile
 import Git.CheckAttr
 import Git.CheckIgnore
-import Git.SharedRepository
 import qualified Git.Hook
 import qualified Git.Queue
 import Types.Key
@@ -115,7 +114,6 @@ data AnnexState = AnnexState
 	, uuidmap :: Maybe UUIDMap
 	, preferredcontentmap :: Maybe (FileMatcherMap Annex)
 	, requiredcontentmap :: Maybe (FileMatcherMap Annex)
-	, shared :: Maybe SharedRepository
 	, forcetrust :: TrustMap
 	, trustmap :: Maybe TrustMap
 	, groupmap :: Maybe GroupMap
@@ -161,7 +159,6 @@ newState c r = AnnexState
 	, uuidmap = Nothing
 	, preferredcontentmap = Nothing
 	, requiredcontentmap = Nothing
-	, shared = Nothing
 	, forcetrust = M.empty
 	, trustmap = Nothing
 	, groupmap = Nothing

Annex/Content.hs

@@ -614,39 +614,39 @@ preseedTmp key file = go =<< inAnnex key
  - allow reading it, per core.sharedRepository setting. -}
 freezeContent :: FilePath -> Annex ()
 freezeContent file = unlessM crippledFileSystem $
-	liftIO . go =<< fromRepo getSharedRepository
+	withShared go
   where
-	go GroupShared = modifyFileMode file $
+	go GroupShared = liftIO $ modifyFileMode file $
 		removeModes writeModes .
 		addModes [ownerReadMode, groupReadMode]
-	go AllShared = modifyFileMode file $
+	go AllShared = liftIO $ modifyFileMode file $
 		removeModes writeModes .
 		addModes readModes
-	go _ = modifyFileMode file $
+	go _ = liftIO $ modifyFileMode file $
 		removeModes writeModes .
 		addModes [ownerReadMode]
 
 {- Adjusts read mode of annexed file per core.sharedRepository setting. -}
 chmodContent :: FilePath -> Annex ()
 chmodContent file = unlessM crippledFileSystem $
-	liftIO . go =<< fromRepo getSharedRepository
+	withShared go
   where
-	go GroupShared = modifyFileMode file $
+	go GroupShared = liftIO $ modifyFileMode file $
 		addModes [ownerReadMode, groupReadMode]
-	go AllShared = modifyFileMode file $
+	go AllShared = liftIO $ modifyFileMode file $
 		addModes readModes
-	go _ = modifyFileMode file $
+	go _ = liftIO $ modifyFileMode file $
 		addModes [ownerReadMode]
 
 {- Allows writing to an annexed file that freezeContent was called on
  - before. -}
 thawContent :: FilePath -> Annex ()
 thawContent file = unlessM crippledFileSystem $
-	liftIO . go =<< fromRepo getSharedRepository
+	withShared go
   where
-	go GroupShared = groupWriteRead file
-	go AllShared = groupWriteRead file
-	go _ = allowWrite file
+	go GroupShared = liftIO $ groupWriteRead file
+	go AllShared = liftIO $ groupWriteRead file
+	go _ = liftIO $ allowWrite file
 
 {- Finds files directly inside a directory like gitAnnexBadDir 
  - (not in subdirectories) and returns the corresponding keys. -}

Annex/Perms.hs

@@ -15,6 +15,7 @@ module Annex.Perms (
 	freezeContentDir,
 	thawContentDir,
 	modifyContent,
+	withShared,
 ) where
 
 import Common.Annex
@@ -26,12 +27,7 @@ import Config
 import System.Posix.Types
 
 withShared :: (SharedRepository -> Annex a) -> Annex a
-withShared a = maybe startup a =<< Annex.getState Annex.shared
-  where
-	startup = do
-		shared <- fromRepo getSharedRepository
-		Annex.changeState $ \s -> s { Annex.shared = Just shared }
-		a shared
+withShared a = a =<< coreSharedRepository <$> Annex.getGitConfig
 
 setAnnexFilePerm :: FilePath -> Annex ()
 setAnnexFilePerm = setAnnexPerm False
@@ -90,12 +86,12 @@ createAnnexDirectory dir = walk dir [] =<< top
  -}
 freezeContentDir :: FilePath -> Annex ()
 freezeContentDir file = unlessM crippledFileSystem $
-	liftIO . go =<< fromRepo getSharedRepository
+	withShared go
   where
 	dir = parentDir file
-	go GroupShared = groupWriteRead dir
-	go AllShared = groupWriteRead dir
-	go _ = preventWrite dir
+	go GroupShared = liftIO $ groupWriteRead dir
+	go AllShared = liftIO $ groupWriteRead dir
+	go _ = liftIO $ preventWrite dir
 
 thawContentDir :: FilePath -> Annex ()
 thawContentDir file = unlessM crippledFileSystem $

Types/GitConfig.hs

@@ -16,6 +16,7 @@ import Common
 import qualified Git
 import qualified Git.Config
 import qualified Git.Construct
+import Git.SharedRepository
 import Utility.DataUnits
 import Config.Cost
 import Types.Distribution
@@ -58,6 +59,7 @@ data GitConfig = GitConfig
 	, annexStartupScan :: Bool
 	, annexHardLink :: Bool
 	, coreSymlinks :: Bool
+	, coreSharedRepository :: SharedRepository
 	, gcryptId :: Maybe String
 	, annexDifferences :: Differences
 	, annexUsedRefSpec :: Maybe RefSpec
@@ -97,6 +99,7 @@ extractGitConfig r = GitConfig
 	, annexStartupScan = getbool (annex "startupscan") True
 	, annexHardLink = getbool (annex "hardlink") False
 	, coreSymlinks = getbool "core.symlinks" True
+	, coreSharedRepository = getSharedRepository r
 	, gcryptId = getmaybe "core.gcrypt-id"
 	, annexDifferences = getDifferences r
 	, annexUsedRefSpec = either (const Nothing) Just . parseRefSpec