30 lines
699 B
Haskell
30 lines
699 B
Haskell
{- git-annex "SHA1" 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.SHA1 (backend) where
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import Control.Monad.State
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import Data.String.Utils
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import System.Cmd.Utils
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import System.IO
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import qualified Backend.File
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import TypeInternals
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backend = Backend.File.backend {
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name = "SHA1",
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getKey = keyValue
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}
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-- checksum the file to get its key
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keyValue :: FilePath -> Annex (Maybe Key)
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keyValue file = liftIO $ pOpen ReadFromPipe "sha1sum" [file] $ \h -> do
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line <- hGetLine h
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let bits = split " " line
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if (null bits)
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then error "sha1sum parse error"
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else return $ Just $ Key ((name backend), bits !! 0)
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