wip RawFilePath 2x git-annex find speedup

Finally builds (oh the agoncy of making it build), but still very
unmergable, only Command.Find is included and lots of stuff is badly
hacked to make it compile.

Benchmarking vs master, this git-annex find is significantly faster!
Specifically:

	num files	old	new	speedup
	48500		4.77	3.73	28%
	12500		1.36	1.02	66%
	20		0.075	0.074	0% (so startup time is unchanged)

That's without really finishing the optimization. Things still to do:

* Eliminate all the fromRawFilePath, toRawFilePath, encodeBS,
  decodeBS conversions.
* Use versions of IO actions like getFileStatus that take a RawFilePath.
* Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy.
* Use ByteString for parsing git config to speed up startup.

It's likely several of those will speed up git-annex find further.
And other commands will certianly benefit even more.

Remote/Directory.hs

@@ -295,18 +295,18 @@ renameExportM d _k oldloc newloc = liftIO $ Just <$> go
 	dest = exportPath d newloc
 
 exportPath :: FilePath -> ExportLocation -> FilePath
-exportPath d loc = d </> fromExportLocation loc
+exportPath d loc = d </> fromRawFilePath (fromExportLocation loc)
 
 {- Removes the ExportLocation's parent directory and its parents, so long as
  - they're empty, up to but not including the topdir. -}
 removeExportLocation :: FilePath -> ExportLocation -> IO ()
 removeExportLocation topdir loc = 
-	go (Just $ takeDirectory $ fromExportLocation loc) (Right ())
+	go (Just $ takeDirectory $ fromRawFilePath $ fromExportLocation loc) (Right ())
   where
 	go _ (Left _e) = return ()
 	go Nothing _ = return ()
 	go (Just loc') _ = go (upFrom loc')
-		=<< tryIO (removeDirectory $ exportPath topdir (mkExportLocation loc'))
+		=<< tryIO (removeDirectory $ exportPath topdir (mkExportLocation (toRawFilePath loc')))
 
 listImportableContentsM :: FilePath -> Annex (Maybe (ImportableContents (ContentIdentifier, ByteSize)))
 listImportableContentsM dir = catchMaybeIO $ liftIO $ do
@@ -319,7 +319,7 @@ listImportableContentsM dir = catchMaybeIO $ liftIO $ do
 		mkContentIdentifier f st >>= \case
 			Nothing -> return Nothing
 			Just cid -> do
-				relf <- relPathDirToFile dir f
+				relf <- toRawFilePath <$> relPathDirToFile dir f
 				sz <- getFileSize' f st
 				return $ Just (mkImportLocation relf, (cid, sz))
 

Remote/Git.hs

@@ -549,7 +549,7 @@ copyFromRemote'' repo forcersync r st@(State connpool _ _ _) key file dest meter
 		u <- getUUID
 		let AssociatedFile afile = file
 		let fields = (Fields.remoteUUID, fromUUID u)
-			: maybe [] (\f -> [(Fields.associatedFile, f)]) afile
+			: maybe [] (\f -> [(Fields.associatedFile, fromRawFilePath f)]) afile
 		Just (cmd, params) <- Ssh.git_annex_shell ConsumeStdin
 			repo "transferinfo" 
 			[Param $ serializeKey key] fields

Remote/Helper/Ssh.hs

@@ -137,7 +137,7 @@ rsyncParamsRemote unlocked r direction key file (AssociatedFile afile) = do
 		-- Send direct field for unlocked content, for backwards
 		-- compatability.
 		: (Fields.direct, if unlocked then "1" else "")
-		: maybe [] (\f -> [(Fields.associatedFile, f)]) afile
+		: maybe [] (\f -> [(Fields.associatedFile, fromRawFilePath f)]) afile
 	repo <- getRepo r
 	Just (shellcmd, shellparams) <- git_annex_shell ConsumeStdin repo
 		(if direction == Download then "sendkey" else "recvkey")

Remote/List.hs

@@ -24,6 +24,7 @@ import qualified Git
 import qualified Git.Config
 
 import qualified Remote.Git
+{-
 import qualified Remote.GCrypt
 import qualified Remote.P2P
 #ifdef WITH_S3
@@ -44,10 +45,12 @@ import qualified Remote.Ddar
 import qualified Remote.GitLFS
 import qualified Remote.Hook
 import qualified Remote.External
+-}
 
 remoteTypes :: [RemoteType]
 remoteTypes = map adjustExportImportRemoteType
 	[ Remote.Git.remote
+{-
 	, Remote.GCrypt.remote
 	, Remote.P2P.remote
 #ifdef WITH_S3
@@ -68,6 +71,7 @@ remoteTypes = map adjustExportImportRemoteType
 	, Remote.GitLFS.remote
 	, Remote.Hook.remote
 	, Remote.External.remote
+-}
 	]
 
 {- Builds a list of all available Remotes.
@@ -129,7 +133,9 @@ updateRemote remote = do
 gitSyncableRemote :: Remote -> Bool
 gitSyncableRemote r = remotetype r `elem`
 	[ Remote.Git.remote
+{-
 	, Remote.GCrypt.remote
 	, Remote.P2P.remote
 	, Remote.GitLFS.remote
+-}
 	]

Remote/Rsync.hs

@@ -268,22 +268,22 @@ storeExportM :: RsyncOpts -> FilePath -> Key -> ExportLocation -> MeterUpdate ->
 storeExportM o src _k loc meterupdate =
 	storeGeneric o meterupdate basedest populatedest
   where
-	basedest = fromExportLocation loc
+	basedest = fromRawFilePath (fromExportLocation loc)
 	populatedest = liftIO . createLinkOrCopy src
 
 retrieveExportM :: RsyncOpts -> Key -> ExportLocation -> FilePath -> MeterUpdate -> Annex Bool
 retrieveExportM o _k loc dest p = rsyncRetrieve o [rsyncurl] dest (Just p)
   where
-	rsyncurl = mkRsyncUrl o (fromExportLocation loc)
+	rsyncurl = mkRsyncUrl o (fromRawFilePath (fromExportLocation loc))
 
 checkPresentExportM :: RsyncOpts -> Key -> ExportLocation -> Annex Bool
 checkPresentExportM o _k loc = checkPresentGeneric o [rsyncurl]
   where
-	rsyncurl = mkRsyncUrl o (fromExportLocation loc)
+	rsyncurl = mkRsyncUrl o (fromRawFilePath (fromExportLocation loc))
 
 removeExportM :: RsyncOpts -> Key -> ExportLocation -> Annex Bool
 removeExportM o _k loc =
-	removeGeneric o (includes (fromExportLocation loc))
+	removeGeneric o $ includes $ fromRawFilePath $ fromExportLocation loc
   where
 	includes f = f : case upFrom f of
 		Nothing -> []
@@ -292,7 +292,7 @@ removeExportM o _k loc =
 removeExportDirectoryM :: RsyncOpts -> ExportDirectory -> Annex Bool
 removeExportDirectoryM o ed = removeGeneric o (allbelow d : includes d)
   where
-	d = fromExportDirectory ed
+	d = fromRawFilePath $ fromExportDirectory ed
 	allbelow f = f </> "***"
 	includes f = f : case upFrom f of
 		Nothing -> []