git-annex-3.20110702: Command/Lock.hs

{- git-annex command
 -
 - Copyright 2010 Joey Hess <joey@kitenet.net>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

module Command.Lock where

import Control.Monad.State (liftIO)
import System.Directory

import Command
import Messages
import qualified AnnexQueue
import Utility
	
command :: [Command]
command = [repoCommand "lock" paramPath seek "undo unlock command"]

seek :: [CommandSeek]
seek = [withFilesUnlocked start, withFilesUnlockedToBeCommitted start]

{- Undo unlock -}
start :: CommandStartBackendFile
start (file, _) = do
	showStart "lock" file
	next $ perform file

perform :: FilePath -> CommandPerform
perform file = do
	liftIO $ removeFile file
	-- Checkout from HEAD to get rid of any changes that might be 
	-- staged in the index, and get back to the previous symlink to
	-- the content.
	AnnexQueue.add "checkout" [Param "HEAD", Param "--"] file
	next $ return True -- no cleanup needed