added direct and indirect commands

Command/Indirect.hs

@@ -0,0 +1,80 @@
+{- git-annex command
+ -
+ - Copyright 2012 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Command.Indirect where
+
+import Common.Annex
+import Command
+import qualified Git
+import qualified Git.Command
+import qualified Git.LsFiles
+import Config
+import Annex.Direct
+import Annex.Content
+import Annex.CatFile
+
+def :: [Command]
+def = [command "indirect" paramNothing seek "switch repository to indirect mode"]
+
+seek :: [CommandSeek]
+seek = [withNothing start]
+
+start :: CommandStart
+start = notBareRepo $
+	ifM isDirect
+		( next perform, stop )
+
+perform :: CommandPerform
+perform = do
+	showStart "commit" ""
+	whenM (stageDirect) $ do
+		showOutput
+		void $ inRepo $ Git.Command.runBool "commit"
+			[Param "-m", Param "commit before switching to indirect mode"]
+
+	-- Note that we set indirect mode early, so that we can use
+	-- moveAnnex in indirect mode.
+	setDirect False
+
+	top <- fromRepo Git.repoPath
+	(l, clean) <- inRepo $ Git.LsFiles.stagedDetails [top]
+	forM_ l go
+	void $ liftIO clean
+	next cleanup
+  where
+	{- Walk tree from top and move all present direct mode files into
+	 - the annex, replacing with symlinks. Also delete direct mode
+	 - caches and mappings. -}
+	go (_, Nothing) = noop
+	go (f, Just sha) = do
+		r <- liftIO $ catchMaybeIO $ getSymbolicLinkStatus f
+		case r of
+			Just s
+				| isSymbolicLink s -> void $ flip whenAnnexed f $
+					\_ (k, _) -> do
+						cleandirect k
+						return Nothing
+				| otherwise -> 
+					maybe noop (fromdirect f)
+						=<< catKey sha
+			_ -> noop
+
+	fromdirect f k = do
+		showStart "indirect" f
+		cleandirect k -- clean before content directory gets frozen
+		whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do
+			moveAnnex k f
+			l <- calcGitLink f k
+			liftIO $ createSymbolicLink l f
+		showEndOk
+
+	cleandirect k = do
+		liftIO . nukeFile =<< inRepo (gitAnnexCache k)
+		liftIO . nukeFile =<< inRepo (gitAnnexMapping k)
+
+cleanup :: CommandCleanup
+cleanup = return True