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|
{- git-annex command
-
- Copyright 2012 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.ReKey where
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 Utility.CopyFile
import qualified Remote
cmd :: Command
cmd = notDirect $
command "rekey" SectionPlumbing
"change keys used for files"
(paramRepeating $ paramPair paramPath paramKey)
(withParams seek)
seek :: CmdParams -> 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 (when supported),
- to avoid wasting disk space. -}
linkKey :: Key -> Key -> Annex Bool
linkKey oldkey newkey = getViaTmp' DefaultVerify newkey $ \tmp -> unVerified $ do
src <- calcRepo $ gitAnnexLocation oldkey
liftIO $ ifM (doesFileExist tmp)
( return True
, createLinkOrCopy src tmp
)
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
forM_ urls $ \url -> do
r <- Remote.claimingUrl url
setUrlPresent (Remote.uuid r) newkey url
-- Update symlink to use the new key.
liftIO $ removeFile file
Command.Add.addLink file newkey Nothing
logStatus newkey InfoPresent
return True
|
