lock and unlock subcommands

Command/Unlock.hs

@@ -0,0 +1,36 @@
+{- git-annex command
+ -
+ - Copyright 2010 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Command.Unlock where
+
+import Control.Monad.State (liftIO)
+import System.Directory
+
+import Command
+import qualified Annex
+import Types
+import Messages
+import Locations
+import Utility
+
+{- The unlock subcommand replaces the symlink with a copy of the file's
+ - content. -}
+start :: SubCmdStartString
+start file = isAnnexed file $ \(key, _) -> do
+	showStart "unlock" file
+	return $ Just $ perform file key
+
+perform :: FilePath -> Key -> SubCmdPerform
+perform dest key = do
+	g <- Annex.gitRepo
+	let src = annexLocation g key
+	liftIO $ removeFile dest
+	showNote "copying..."
+	ok <- liftIO $ boolSystem "cp" ["-p", src, dest]
+        if ok
+                then return $ Just $ return True -- no cleanup needed
+                else error "cp failed!"