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|
{- 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 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 RemoteClass
import Types
import qualified GitRepo as Git
import qualified Annex
import UUID
import Locations
import CopyFile
import Config
import Content
import Utility
import Remote.Special
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 _ = do
dir <- getConfig r "directory" (error "missing directory")
cst <- remoteCost r cheapRemoteCost
return $ 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 = case M.lookup "directory" c of
Nothing -> error "Specify directory="
Just d -> d
e <- liftIO $ doesDirectoryExist dir
when (not e) $ error $ "Directory does not exist: " ++ dir
-- 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
liftIO $ catch (copy src) (const $ return False)
where
dest = dirKey d k
dir = parentDir dest
copy src = do
createDirectoryIfMissing True dir
allowWrite dir
ok <- copyFile src dest
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
remove :: FilePath -> Key -> Annex Bool
remove d k = liftIO $ catch del (const $ return False)
where
file = dirKey d k
dir = parentDir file
del = do
allowWrite dir
removeFile file
removeDirectory dir
return True
checkPresent :: FilePath -> Key -> Annex (Either IOException Bool)
checkPresent d k = liftIO $ try $ doesFileExist (dirKey d k)
|
