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{- git-annex "SHA1" backend
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Backend.SHA1 (backend) where
import Control.Monad.State
import Data.String.Utils
import System.Cmd.Utils
import System.IO
import qualified Backend.File
import TypeInternals
backend = Backend.File.backend {
name = "SHA1",
getKey = keyValue
}
-- checksum the file to get its key
keyValue :: FilePath -> Annex (Maybe Key)
keyValue file = liftIO $ pOpen ReadFromPipe "sha1sum" [file] $ \h -> do
line <- hGetLine h
let bits = split " " line
if (null bits)
then error "sha1sum parse error"
else return $ Just $ Key ((name backend), bits !! 0)
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