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|
{- git-annex command
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.ReKey where
import System.PosixCompat.Files
import Common.Annex
import Command
import qualified Annex
import Types.Key
import Annex.Content
import qualified Command.Add
import Logs.Web
import Logs.Location
import Config
import Utility.CopyFile
def :: [Command]
def = [notDirect $ command "rekey"
(paramOptional $ paramRepeating $ paramPair paramPath paramKey)
seek SectionPlumbing "change keys used for files"]
seek :: [CommandSeek]
seek = [withPairs start]
start :: (FilePath, String) -> CommandStart
start (file, keyname) = ifAnnexed file go stop
where
newkey = fromMaybe (error "bad key") $ file2key keyname
go (oldkey, _)
| oldkey == newkey = stop
| otherwise = do
showStart "rekey" file
next $ perform file oldkey newkey
perform :: FilePath -> Key -> Key -> CommandPerform
perform file oldkey newkey = do
present <- inAnnex oldkey
_ <- if present
then linkKey oldkey newkey
else do
unlessM (Annex.getState Annex.force) $
error $ file ++ " is not available (use --force to override)"
return True
next $ cleanup file oldkey newkey
{- Make a hard link to the old key content, to avoid wasting disk space. -}
linkKey :: Key -> Key -> Annex Bool
linkKey oldkey newkey = getViaTmpUnchecked newkey $ \tmp -> do
src <- calcRepo $ gitAnnexLocation oldkey
ifM (liftIO $ doesFileExist tmp)
( return True
, ifM crippledFileSystem
( liftIO $ copyFileExternal src tmp
, do
liftIO $ createLink src tmp
return True
)
)
cleanup :: FilePath -> Key -> Key -> CommandCleanup
cleanup file oldkey newkey = do
-- If the old key had some associated urls, record them for
-- the new key as well.
urls <- getUrls oldkey
unless (null urls) $
mapM_ (setUrlPresent newkey) urls
-- Update symlink to use the new key.
liftIO $ removeFile file
Command.Add.addLink file newkey True
logStatus newkey InfoPresent
return True
|
