167523f09d
Rename Locations functions for better consitency, and make their values more consistent too. Used </> rather than manually building paths. There are still more places that manually do so, but are tricky, due to the behavior of </> when the second FilePath is absolute. So I only changed places where it obviously was relative.
62 lines
1.4 KiB
Haskell
62 lines
1.4 KiB
Haskell
{- 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 System.Directory
|
|
|
|
import qualified Backend.File
|
|
import BackendTypes
|
|
import Messages
|
|
import qualified Annex
|
|
import Locations
|
|
import Content
|
|
import Types
|
|
|
|
backend :: Backend Annex
|
|
backend = Backend.File.backend {
|
|
name = "SHA1",
|
|
getKey = keyValue,
|
|
fsckKey = Backend.File.checkKey checkKeySHA1
|
|
}
|
|
|
|
sha1 :: FilePath -> Annex String
|
|
sha1 file = do
|
|
showNote "checksum..."
|
|
liftIO $ pOpen ReadFromPipe "sha1sum" [file] $ \h -> do
|
|
line <- hGetLine h
|
|
let bits = split " " line
|
|
if null bits
|
|
then error "sha1sum parse error"
|
|
else return $ head bits
|
|
|
|
-- A key is a sha1 of its contents.
|
|
keyValue :: FilePath -> Annex (Maybe Key)
|
|
keyValue file = do
|
|
s <- sha1 file
|
|
return $ Just $ Key (name backend, s)
|
|
|
|
-- A key's sha1 is checked during fsck.
|
|
checkKeySHA1 :: Key -> Annex Bool
|
|
checkKeySHA1 key = do
|
|
g <- Annex.gitRepo
|
|
let file = gitAnnexLocation g key
|
|
present <- liftIO $ doesFileExist file
|
|
if not present
|
|
then return True
|
|
else do
|
|
s <- sha1 file
|
|
if s == keyName key
|
|
then return True
|
|
else do
|
|
dest <- moveBad key
|
|
warning $ "Bad file content; moved to "++dest
|
|
return False
|