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|
{- git-annex "URL" backend
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Backend.URL (backends) where
import Control.Monad.State (liftIO)
import Types
import BackendClass
import Utility
import Messages
import Key
backends :: [Backend Annex]
backends = [backend]
backend :: Backend Annex
backend = Backend {
name = "URL",
getKey = keyValue,
storeFileKey = dummyStore,
retrieveKeyFile = downloadUrl,
-- allow keys to be removed; presumably they can always be
-- downloaded again
removeKey = dummyRemove,
-- similarly, keys are always assumed to be out there on the web
hasKey = dummyOk,
-- and nothing needed to fsck
fsckKey = dummyFsck,
-- and key upgrade not needed
upgradableKey = \_ -> return False
}
-- 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
dummyRemove :: Key -> Maybe a -> Annex Bool
dummyRemove _ _ = return True
dummyFsck :: Key -> Maybe FilePath -> Maybe a -> Annex Bool
dummyFsck _ _ _ = return True
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" [Params "-# -o", File file, File url]
where
url = keyName key
|
