git-annex/Backend/URL.hs
Joey Hess 5fa25a812a fsck improvements
* fsck: Check if annex.numcopies is satisfied.
* fsck: Verify the sha1 of files when the SHA1 backend is used.
* fsck: Verify the size of files when the WORM backend is used.
* fsck: Allow specifying individual files to fsk if fscking everything
  is not desired.
* fsck: Fix bug, introduced in 0.04, in detection of unused data.
2010-11-13 14:59:27 -04:00

49 lines
1.2 KiB
Haskell

{- git-annex "URL" backend
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Backend.URL (backend) where
import Control.Monad.State (liftIO)
import Data.String.Utils
import TypeInternals
import Utility
import Messages
backend :: Backend
backend = Backend {
name = "URL",
getKey = keyValue,
storeFileKey = dummyStore,
retrieveKeyFile = downloadUrl,
-- allow keys to be removed; presumably they can always be
-- downloaded again
removeKey = dummyOk,
-- similarly, keys are always assumed to be out there on the web
hasKey = dummyOk,
-- and nothing needed to fsck
fsckKey = dummyOk
}
-- cannot generate url from filename
keyValue :: FilePath -> Annex (Maybe Key)
keyValue _ = return Nothing
-- cannot change url contents
dummyStore :: FilePath -> Key -> Annex Bool
dummyStore _ _ = return False
dummyOk :: Key -> Annex Bool
dummyOk _ = return True
downloadUrl :: Key -> FilePath -> Annex Bool
downloadUrl key file = do
showNote "downloading"
showProgress -- make way for curl progress bar
liftIO $ boolSystem "curl" ["-#", "-o", file, url]
where
url = join ":" $ drop 1 $ split ":" $ show key