128 lines
3.3 KiB
Haskell
128 lines
3.3 KiB
Haskell
{- A "remote" that is just a filesystem directory.
|
||
-
|
||
- Copyright 2011 Joey Hess <joey@kitenet.net>
|
||
-
|
||
- Licensed under the GNU GPL version 3 or higher.
|
||
-}
|
||
|
||
module Remote.Directory (remote) where
|
||
|
||
import qualified Data.ByteString.Lazy.Char8 as L
|
||
import IO
|
||
import Control.Exception.Extensible (IOException)
|
||
import qualified Data.Map as M
|
||
import Control.Monad (when)
|
||
import Control.Monad.State (liftIO)
|
||
import System.Directory hiding (copyFile)
|
||
import System.FilePath
|
||
|
||
import Types
|
||
import Types.Remote
|
||
import qualified GitRepo as Git
|
||
import qualified Annex
|
||
import UUID
|
||
import Locations
|
||
import CopyFile
|
||
import Config
|
||
import Content
|
||
import Utility
|
||
import Remote.Special
|
||
import Remote.Encryptable
|
||
import Crypto
|
||
|
||
remote :: RemoteType Annex
|
||
remote = RemoteType {
|
||
typename = "directory",
|
||
enumerate = findSpecialRemotes "directory",
|
||
generate = gen,
|
||
setup = directorySetup
|
||
}
|
||
|
||
gen :: Git.Repo -> UUID -> Maybe RemoteConfig -> Annex (Remote Annex)
|
||
gen r u c = do
|
||
dir <- getConfig r "directory" (error "missing directory")
|
||
cst <- remoteCost r cheapRemoteCost
|
||
return $ encryptableRemote c
|
||
(storeEncrypted dir)
|
||
(retrieveEncrypted dir)
|
||
Remote {
|
||
uuid = u,
|
||
cost = cst,
|
||
name = Git.repoDescribe r,
|
||
storeKey = store dir,
|
||
retrieveKeyFile = retrieve dir,
|
||
removeKey = remove dir,
|
||
hasKey = checkPresent dir,
|
||
hasKeyCheap = True,
|
||
config = Nothing
|
||
}
|
||
|
||
directorySetup :: UUID -> RemoteConfig -> Annex RemoteConfig
|
||
directorySetup u c = do
|
||
-- verify configuration is sane
|
||
let dir = maybe (error "Specify directory=") id $
|
||
M.lookup "directory" c
|
||
liftIO $ doesDirectoryExist dir
|
||
>>! error $ "Directory does not exist: " ++ dir
|
||
c' <- encryptionSetup c
|
||
|
||
-- The directory is stored in git config, not in this remote's
|
||
-- persistant state, so it can vary between hosts.
|
||
gitConfigSpecialRemote u c' "directory" dir
|
||
return $ M.delete "directory" c'
|
||
|
||
dirKey :: FilePath -> Key -> FilePath
|
||
dirKey d k = d </> hashDirMixed k </> f </> f
|
||
where
|
||
f = keyFile k
|
||
|
||
store :: FilePath -> Key -> Annex Bool
|
||
store d k = do
|
||
g <- Annex.gitRepo
|
||
let src = gitAnnexLocation g k
|
||
let dest = dirKey d k
|
||
liftIO $ catchBool $ storeHelper dest $ copyFile src dest
|
||
|
||
storeEncrypted :: FilePath -> (Cipher, Key) -> Key -> Annex Bool
|
||
storeEncrypted d (cipher, enck) k = do
|
||
g <- Annex.gitRepo
|
||
let src = gitAnnexLocation g k
|
||
let dest = dirKey d enck
|
||
liftIO $ catchBool $ storeHelper dest $ encrypt src dest
|
||
where
|
||
encrypt src dest = do
|
||
withEncryptedContent cipher (L.readFile src) $ L.writeFile dest
|
||
return True
|
||
|
||
storeHelper :: FilePath -> IO Bool -> IO Bool
|
||
storeHelper dest a = do
|
||
let dir = parentDir dest
|
||
createDirectoryIfMissing True dir
|
||
allowWrite dir
|
||
ok <- a
|
||
when ok $ do
|
||
preventWrite dest
|
||
preventWrite dir
|
||
return ok
|
||
|
||
retrieve :: FilePath -> Key -> FilePath -> Annex Bool
|
||
retrieve d k f = liftIO $ copyFile (dirKey d k) f
|
||
|
||
retrieveEncrypted :: FilePath -> (Cipher, Key) -> FilePath -> Annex Bool
|
||
retrieveEncrypted d (cipher, enck) f =
|
||
liftIO $ catchBool $ do
|
||
withDecryptedContent cipher (L.readFile (dirKey d enck)) $ L.writeFile f
|
||
return True
|
||
|
||
remove :: FilePath -> Key -> Annex Bool
|
||
remove d k = liftIO $ catchBool $ do
|
||
allowWrite dir
|
||
removeFile file
|
||
removeDirectory dir
|
||
return True
|
||
where
|
||
file = dirKey d k
|
||
dir = parentDir file
|
||
|
||
checkPresent :: FilePath -> Key -> Annex (Either IOException Bool)
|
||
checkPresent d k = liftIO $ try $ doesFileExist (dirKey d k)
|