13bbb61a51
Needed for resuming from chunks. Url keys are considered not stable. I considered treating url keys with a known size as stable, but just don't feel that is enough information.
41 lines
859 B
Haskell
41 lines
859 B
Haskell
{- git-annex "URL" backend -- keys whose content is available from urls.
|
|
-
|
|
- Copyright 2011 Joey Hess <joey@kitenet.net>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
module Backend.URL (
|
|
backends,
|
|
fromUrl
|
|
) where
|
|
|
|
import Common.Annex
|
|
import Types.Backend
|
|
import Types.Key
|
|
import Backend.Utilities
|
|
|
|
backends :: [Backend]
|
|
backends = [backend]
|
|
|
|
backend :: Backend
|
|
backend = Backend
|
|
{ name = "URL"
|
|
, getKey = const $ return Nothing
|
|
, fsckKey = Nothing
|
|
, canUpgradeKey = Nothing
|
|
, fastMigrate = Nothing
|
|
-- The content of an url can change at any time, so URL keys are
|
|
-- not stable.
|
|
, isStableKey = const False
|
|
}
|
|
|
|
{- Every unique url has a corresponding key. -}
|
|
fromUrl :: String -> Maybe Integer -> Annex Key
|
|
fromUrl url size = do
|
|
n <- genKeyName url
|
|
return $ stubKey
|
|
{ keyName = n
|
|
, keyBackendName = "URL"
|
|
, keySize = size
|
|
}
|