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