added direct and indirect commands

Command/Direct.hs

@@ -0,0 +1,67 @@
+{- git-annex command
+ -
+ - Copyright 2012 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Command.Direct where
+
+import Common.Annex
+import Command
+import qualified Git
+import qualified Git.Command
+import qualified Git.LsFiles
+import Config
+import Annex.Content
+import Annex.Content.Direct
+
+def :: [Command]
+def = [command "direct" paramNothing seek "switch repository to direct mode"]
+
+seek :: [CommandSeek]
+seek = [withNothing start]
+
+start :: CommandStart
+start = notBareRepo $
+	ifM isDirect
+		( stop , next perform )
+
+perform :: CommandPerform
+perform = do
+	showStart "commit" ""
+	showOutput
+	_ <- inRepo $ Git.Command.runBool "commit"
+		[Param "-a", Param "-m", Param "commit before switching to direct mode"]
+	top <- fromRepo Git.repoPath
+	(l, clean) <- inRepo $ Git.LsFiles.inRepo [top]
+	forM_ l go
+	void $ liftIO clean
+	next cleanup
+  where
+	{- Walk tree from top and move all present objects to the
+	 - files that link to them, while updating direct mode mappings. -}
+	go = whenAnnexed $ \f (k, _) -> do
+		loc <- inRepo $ gitAnnexLocation k
+		createContentDir loc -- thaws directory too
+		locs <- filter (/= f) <$> addAssociatedFile k f
+		case locs of
+			[] -> whenM (liftIO $ doesFileExist loc) $ do
+				{- Move content from annex to direct file. -}
+				showStart "direct" f
+				updateCache k loc
+				thawContent loc
+				liftIO $ replaceFile f $ moveFile loc
+				showEndOk
+			(loc':_) -> do
+				{- Another direct file has the content, so
+				 - hard link to it. -}
+				showStart "direct" f
+				liftIO $ replaceFile f $ createLink loc'
+				showEndOk
+		return Nothing
+
+cleanup :: CommandCleanup
+cleanup = do
+	setDirect True
+	return True