implement annex.tune.branchhash1

I hope this doesn't impact speed much -- it does have to pull out a value
from Annex state every time it accesses the branch now.

The test case I dropped has never caught any problems that I can remember,
and would have been rather difficult to convert.

11 files changed, 78 insertions, 64 deletions

diff --git a/Annex/DirHashes.hs b/Annex/DirHashes.hs
index 36998821b..b58b5a215 100644
--- a/Annex/DirHashes.hs
+++ b/Annex/DirHashes.hs
@@ -9,6 +9,8 @@ module Annex.DirHashes (
 	Hasher,
 	HashLevels(..),
 	objectHashLevels,
+	branchHashLevels,
+	branchHashDir,
 	dirHashes,
 	hashDirMixed,
 	hashDirLower,
@@ -33,11 +35,19 @@ instance Default HashLevels where
 	def = HashLevels 2
 
 objectHashLevels :: GitConfig -> HashLevels
-objectHashLevels config
-	| hasDifference (== OneLevelObjectHash) (annexDifferences config) =
-		HashLevels 1
+objectHashLevels = configHashLevels OneLevelObjectHash
+
+branchHashLevels :: GitConfig -> HashLevels
+branchHashLevels = configHashLevels OneLevelBranchHash
+
+configHashLevels :: Difference -> GitConfig -> HashLevels
+configHashLevels d config
+	| hasDifference (== d) (annexDifferences config) = HashLevels 1
 	| otherwise = def
 
+branchHashDir :: GitConfig -> Key -> String
+branchHashDir config key = hashDirLower (branchHashLevels config) key
+
 {- Two different directory hashes may be used. The mixed case hash
  - came first, and is fine, except for the problem of case-strict
  - filesystems such as Linux VFAT (mounted with shortname=mixed),
diff --git a/Command/Log.hs b/Command/Log.hs
index 7eaa48f70..7c48388c2 100644
--- a/Command/Log.hs
+++ b/Command/Log.hs
@@ -141,7 +141,8 @@ getLog :: Key -> [CommandParam] -> Annex [String]
 getLog key os = do
 	top <- fromRepo Git.repoPath
 	p <- liftIO $ relPathCwdToFile top
-	let logfile = p </> locationLogFile key
+	config <- Annex.getGitConfig
+	let logfile = p </> locationLogFile config key
 	inRepo $ pipeNullSplitZombie $
 		[ Params "log -z --pretty=format:%ct --raw --abbrev=40"
 		, Param "--remove-empty"
diff --git a/Logs.hs b/Logs.hs
index b0f330e93..1f8cf9f9c 100644
--- a/Logs.hs
+++ b/Logs.hs
@@ -9,6 +9,7 @@ module Logs where
 
 import Common.Annex
 import Types.Key
+import Annex.DirHashes
 
 {- There are several varieties of log file formats. -}
 data LogVariety
@@ -87,8 +88,8 @@ differenceLog :: FilePath
 differenceLog = "difference.log"
 
 {- The pathname of the location log file for a given key. -}
-locationLogFile :: Key -> String
-locationLogFile key = hashDirLower def key ++ keyFile key ++ ".log"
+locationLogFile :: GitConfig -> Key -> String
+locationLogFile config key = branchHashDir config key </> keyFile key ++ ".log"
 
 {- Converts a pathname into a key if it's a location log. -}
 locationLogFileKey :: FilePath -> Maybe Key
@@ -101,15 +102,17 @@ locationLogFileKey path
 	(base, ext) = splitAt (length file - 4) file
 
 {- The filename of the url log for a given key. -}
-urlLogFile :: Key -> FilePath
-urlLogFile key = hashDirLower def key </> keyFile key ++ urlLogExt
+urlLogFile :: GitConfig -> Key -> FilePath
+urlLogFile config key = branchHashDir config key </> keyFile key ++ urlLogExt
 
 {- Old versions stored the urls elsewhere. -}
-oldurlLogs :: Key -> [FilePath]
-oldurlLogs key =
-	[ "remote/web" </> hashDirLower def key </> key2file key ++ ".log"
-	, "remote/web" </> hashDirLower def key </> keyFile key ++ ".log"
+oldurlLogs :: GitConfig -> Key -> [FilePath]
+oldurlLogs config key =
+	[ "remote/web" </> hdir </> key2file key ++ ".log"
+	, "remote/web" </> hdir </> keyFile key ++ ".log"
 	]
+  where
+	hdir = branchHashDir config key
 
 urlLogExt :: String
 urlLogExt = ".log.web"
@@ -130,8 +133,9 @@ isUrlLog :: FilePath -> Bool
 isUrlLog file = urlLogExt `isSuffixOf` file
 
 {- The filename of the remote state log for a given key. -}
-remoteStateLogFile :: Key -> FilePath
-remoteStateLogFile key = hashDirLower def key </> keyFile key ++ remoteStateLogExt
+remoteStateLogFile :: GitConfig -> Key -> FilePath
+remoteStateLogFile config key = branchHashDir config key 
+	</> keyFile key ++ remoteStateLogExt
 
 remoteStateLogExt :: String
 remoteStateLogExt = ".log.rmt"
@@ -140,8 +144,8 @@ isRemoteStateLog :: FilePath -> Bool
 isRemoteStateLog path = remoteStateLogExt `isSuffixOf` path
 
 {- The filename of the chunk log for a given key. -}
-chunkLogFile :: Key -> FilePath
-chunkLogFile key = hashDirLower def key </> keyFile key ++ chunkLogExt
+chunkLogFile :: GitConfig -> Key -> FilePath
+chunkLogFile config key = branchHashDir config key </> keyFile key ++ chunkLogExt
 
 chunkLogFileKey :: FilePath -> Maybe Key
 chunkLogFileKey path
@@ -159,35 +163,11 @@ isChunkLog :: FilePath -> Bool
 isChunkLog path = chunkLogExt `isSuffixOf` path
 
 {- The filename of the metadata log for a given key. -}
-metaDataLogFile :: Key -> FilePath
-metaDataLogFile key = hashDirLower def key </> keyFile key ++ metaDataLogExt
+metaDataLogFile :: GitConfig -> Key -> FilePath
+metaDataLogFile config key = branchHashDir config key </> keyFile key ++ metaDataLogExt
 
 metaDataLogExt :: String
 metaDataLogExt = ".log.met"
 
 isMetaDataLog :: FilePath -> Bool
 isMetaDataLog path = metaDataLogExt `isSuffixOf` path
-
-prop_logs_sane :: Key -> Bool
-prop_logs_sane dummykey = and
-	[ isNothing (getLogVariety "unknown")
-	, expect gotUUIDBasedLog (getLogVariety uuidLog)
-	, expect gotPresenceLog (getLogVariety $ locationLogFile dummykey)
-	, expect gotPresenceLog (getLogVariety $ urlLogFile dummykey)
-	, expect gotNewUUIDBasedLog (getLogVariety $ remoteStateLogFile dummykey)
-	, expect gotChunkLog (getLogVariety $ chunkLogFile dummykey)
-	, expect gotOtherLog (getLogVariety $ metaDataLogFile dummykey)
-	, expect gotOtherLog (getLogVariety numcopiesLog)
-	]
-  where
-	expect = maybe False
-	gotUUIDBasedLog UUIDBasedLog = True
-	gotUUIDBasedLog _ = False
-	gotNewUUIDBasedLog NewUUIDBasedLog = True
-	gotNewUUIDBasedLog _ = False
-	gotChunkLog (ChunkLog k) = k == dummykey
-	gotChunkLog _ = False
-	gotPresenceLog (PresenceLog k) = k == dummykey
-	gotPresenceLog _ = False
-	gotOtherLog OtherLog = True
-	gotOtherLog _ = False
diff --git a/Logs/Chunk.hs b/Logs/Chunk.hs
index 8ca3ffed3..8f0e7cedb 100644
--- a/Logs/Chunk.hs
+++ b/Logs/Chunk.hs
@@ -29,6 +29,7 @@ import Logs
 import Logs.MapLog
 import qualified Annex.Branch
 import Logs.Chunk.Pure
+import qualified Annex
 
 import qualified Data.Map as M
 import Data.Time.Clock.POSIX
@@ -36,14 +37,17 @@ import Data.Time.Clock.POSIX
 chunksStored :: UUID -> Key -> ChunkMethod -> ChunkCount -> Annex ()
 chunksStored u k chunkmethod chunkcount = do
 	ts <- liftIO getPOSIXTime
-	Annex.Branch.change (chunkLogFile k) $
+	config <- Annex.getGitConfig
+	Annex.Branch.change (chunkLogFile config k) $
 		showLog . changeMapLog ts (u, chunkmethod) chunkcount . parseLog
 
 chunksRemoved :: UUID -> Key -> ChunkMethod -> Annex ()
 chunksRemoved u k chunkmethod = chunksStored u k chunkmethod 0
 
 getCurrentChunks :: UUID -> Key -> Annex [(ChunkMethod, ChunkCount)]
-getCurrentChunks u k = select . parseLog <$> Annex.Branch.get (chunkLogFile k)
+getCurrentChunks u k = do
+	config <- Annex.getGitConfig
+	select . parseLog <$> Annex.Branch.get (chunkLogFile config k)
   where
 	select = filter (\(_m, ct) -> ct > 0)
 		. map (\((_ku, m), l) -> (m, value l))
diff --git a/Logs/Location.hs b/Logs/Location.hs
index d0109b848..7c6888c0b 100644
--- a/Logs/Location.hs
+++ b/Logs/Location.hs
@@ -29,6 +29,7 @@ import Logs
 import Logs.Presence
 import Annex.UUID
 import Git.Types (RefDate)
+import qualified Annex
 
 {- Log a change in the presence of a key's value in current repository. -}
 logStatus :: Key -> LogStatus -> Annex ()
@@ -38,7 +39,9 @@ logStatus key s = do
 
 {- Log a change in the presence of a key's value in a repository. -}
 logChange :: Key -> UUID -> LogStatus -> Annex ()
-logChange key (UUID u) s = addLog (locationLogFile key) =<< logNow s u
+logChange key (UUID u) s = do
+	config <- Annex.getGitConfig
+	addLog (locationLogFile config key) =<< logNow s u
 logChange _ NoUUID _ = noop
 
 {- Returns a list of repository UUIDs that, according to the log, have
@@ -51,7 +54,9 @@ loggedLocationsHistorical :: RefDate -> Key -> Annex [UUID]
 loggedLocationsHistorical = getLoggedLocations . historicalLog
 
 getLoggedLocations :: (FilePath -> Annex [String]) -> Key -> Annex [UUID]
-getLoggedLocations getter key = map toUUID <$> (getter . locationLogFile) key
+getLoggedLocations getter key = do
+	config <- Annex.getGitConfig
+	map toUUID <$> (getter . locationLogFile config) key
 
 {- Finds all keys that have location log information.
  - (There may be duplicate keys in the list.) -}
diff --git a/Logs/MetaData.hs b/Logs/MetaData.hs
index 3091935cf..ed4e2363e 100644
--- a/Logs/MetaData.hs
+++ b/Logs/MetaData.hs
@@ -38,6 +38,7 @@ import Common.Annex
 import Types.MetaData
 import Annex.MetaData.StandardFields
 import qualified Annex.Branch
+import qualified Annex
 import Logs
 import Logs.SingleValue
 
@@ -52,7 +53,9 @@ instance SingleValueSerializable MetaData where
 	deserialize = Types.MetaData.deserialize
 
 getMetaDataLog :: Key -> Annex (Log MetaData)
-getMetaDataLog = readLog . metaDataLogFile
+getMetaDataLog key = do
+	config <- Annex.getGitConfig
+	readLog $ metaDataLogFile config key
 
 {- Go through the log from oldest to newest, and combine it all
  - into a single MetaData representing the current state.
@@ -97,10 +100,12 @@ addMetaData k metadata = addMetaData' k metadata =<< liftIO getPOSIXTime
 addMetaData' :: Key -> MetaData -> POSIXTime -> Annex ()
 addMetaData' k d@(MetaData m) now
 	| d == emptyMetaData = noop
-	| otherwise = Annex.Branch.change (metaDataLogFile k) $
-		showLog . simplifyLog 
-			. S.insert (LogEntry now metadata)
-			. parseLog
+	| otherwise = do
+		config <- Annex.getGitConfig
+		Annex.Branch.change (metaDataLogFile config k) $
+			showLog . simplifyLog 
+				. S.insert (LogEntry now metadata)
+				. parseLog
   where
 	metadata = MetaData $ M.filterWithKey (\f _ -> not (isLastChangedField f)) m
 
@@ -181,6 +186,7 @@ copyMetaData oldkey newkey
 	| oldkey == newkey = noop
 	| otherwise = do
 		l <- getMetaDataLog oldkey
-		unless (S.null l) $
-			Annex.Branch.change (metaDataLogFile newkey) $
+		unless (S.null l) $ do
+			config <- Annex.getGitConfig
+			Annex.Branch.change (metaDataLogFile config newkey) $
 				const $ showLog l
diff --git a/Logs/RemoteState.hs b/Logs/RemoteState.hs
index 7b3859a35..b302b739a 100644
--- a/Logs/RemoteState.hs
+++ b/Logs/RemoteState.hs
@@ -14,6 +14,7 @@ import Common.Annex
 import Logs
 import Logs.UUIDBased
 import qualified Annex.Branch
+import qualified Annex
 
 import qualified Data.Map as M
 import Data.Time.Clock.POSIX
@@ -23,11 +24,14 @@ type RemoteState = String
 setRemoteState :: UUID -> Key -> RemoteState -> Annex ()
 setRemoteState u k s = do
 	ts <- liftIO getPOSIXTime
-	Annex.Branch.change (remoteStateLogFile k) $
+	config <- Annex.getGitConfig
+	Annex.Branch.change (remoteStateLogFile config k) $
 		showLogNew id . changeLog ts u s . parseLogNew Just
 
 getRemoteState :: UUID -> Key -> Annex (Maybe RemoteState)
-getRemoteState u k = extract . parseLogNew Just
-	<$> Annex.Branch.get (remoteStateLogFile k)
+getRemoteState u k = do
+	config <- Annex.getGitConfig
+	extract . parseLogNew Just
+		<$> Annex.Branch.get (remoteStateLogFile config k)
   where
 	extract m = value <$> M.lookup u m
diff --git a/Logs/Web.hs b/Logs/Web.hs
index 4729cead4..38993c33c 100644
--- a/Logs/Web.hs
+++ b/Logs/Web.hs
@@ -37,7 +37,8 @@ import Utility.Url
 {- Gets all urls that a key might be available from. -}
 getUrls :: Key -> Annex [URLString]
 getUrls key = do
-	l <- go $ urlLogFile key : oldurlLogs key
+	config <- Annex.getGitConfig
+	l <- go $ urlLogFile config key : oldurlLogs config key
 	tmpl <- Annex.getState (maybeToList . M.lookup key . Annex.tempurls)
 	return (tmpl ++ l)
   where
@@ -54,13 +55,15 @@ getUrlsWithPrefix key prefix = filter (prefix `isPrefixOf`) <$> getUrls key
 setUrlPresent :: UUID -> Key -> URLString -> Annex ()
 setUrlPresent uuid key url = do
 	us <- getUrls key
-	unless (url `elem` us) $
-		addLog (urlLogFile key) =<< logNow InfoPresent url
+	unless (url `elem` us) $ do
+		config <- Annex.getGitConfig
+		addLog (urlLogFile config key) =<< logNow InfoPresent url
 	logChange key uuid InfoPresent
 
 setUrlMissing :: UUID -> Key -> URLString -> Annex ()
 setUrlMissing uuid key url = do
-	addLog (urlLogFile key) =<< logNow InfoMissing url
+	config <- Annex.getGitConfig
+	addLog (urlLogFile config key) =<< logNow InfoMissing url
 	whenM (null <$> getUrls key) $
 		logChange key uuid InfoMissing
 
diff --git a/Test.hs b/Test.hs
index 8d432cb61..633ef3690 100644
--- a/Test.hs
+++ b/Test.hs
@@ -38,7 +38,6 @@ import qualified Types.KeySource
 import qualified Types.Backend
 import qualified Types.TrustLevel
 import qualified Types
-import qualified Logs
 import qualified Logs.MapLog
 import qualified Logs.Trust
 import qualified Logs.Remote
@@ -138,7 +137,6 @@ properties = localOption (QuickCheckTests 1000) $ testGroup "QuickCheck"
 	, testProperty "prop_idempotent_key_decode" Types.Key.prop_idempotent_key_decode
 	, testProperty "prop_idempotent_shellEscape" Utility.SafeCommand.prop_idempotent_shellEscape
 	, testProperty "prop_idempotent_shellEscape_multiword" Utility.SafeCommand.prop_idempotent_shellEscape_multiword
-	, testProperty "prop_logs_sane" Logs.prop_logs_sane
 	, testProperty "prop_idempotent_configEscape" Logs.Remote.prop_idempotent_configEscape
 	, testProperty "prop_parse_show_Config" Logs.Remote.prop_parse_show_Config
 	, testProperty "prop_upFrom_basics" Utility.Path.prop_upFrom_basics
diff --git a/Upgrade/V2.hs b/Upgrade/V2.hs
index 2b0b277e8..0f09205ff 100644
--- a/Upgrade/V2.hs
+++ b/Upgrade/V2.hs
@@ -12,6 +12,7 @@ import qualified Git
 import qualified Git.Command
 import qualified Git.Ref
 import qualified Annex.Branch
+import qualified Annex
 import Annex.Content
 import Utility.Tmp
 import Logs
@@ -47,7 +48,8 @@ upgrade = do
 
 	e <- liftIO $ doesDirectoryExist old
 	when e $ do
-		mapM_ (\(k, f) -> inject f $ locationLogFile k) =<< locationLogs
+		config <- Annex.getGitConfig
+		mapM_ (\(k, f) -> inject f $ locationLogFile config k) =<< locationLogs
 		mapM_ (\f -> inject f f) =<< logFiles old
 
 	saveState False
diff --git a/debian/changelog b/debian/changelog
index 8aa351fea..529d460c8 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -26,7 +26,8 @@ git-annex (5.20150114) UNRELEASED; urgency=medium
     http://git-annex.branchable.com/tuning/
   * merge: Refuse to merge changes from a git-annex branch of a repo
     that has been tuned in incompatable ways.
-  * Support annex.tune.objecthash1 and annex.tune.objecthashlower.
+  * Support annex.tune.objecthash1, annex.tune.objecthashlower, and
+    annex.tune.branchhash1.
 
  -- Joey Hess <id@joeyh.name>  Tue, 13 Jan 2015 17:03:39 -0400