git-annex/Command/Unlock.hs
Joey Hess 161823d6ea Only use cp -a if it is supported, falling back to cp -p or plain cp.
* cp --reflink=auto is used if supported, and will make git annex unlock
  much faster on filesystems like btrfs that support copy of write.
2010-11-18 13:49:01 -04:00

43 lines
977 B
Haskell

{- 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 hiding (copyFile)
import Command
import qualified Annex
import Types
import Messages
import Locations
import Utility
import Core
import CopyFile
seek :: [SubCmdSeek]
seek = [withFilesInGit start]
{- 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 $ copyFile src dest
if ok
then do
liftIO $ allowWrite dest
return $ Just $ return True
else error "copy failed!"