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{- git-annex
-}
module Annex where
import Backend
import System.Posix.Files
import System.Directory
import GitRepo
import Utility
{- An annexed file's content is stored somewhere under .git/annex/ -}
annexLoc repo key = do
dir <- gitDir repo
return $ dir ++ "/annex/" ++ key
{- Annexes a file, storing it in a backend, and then moving it into
- the annex directory and setting up the symlink pointing to its content. -}
annexFile :: [Backend] -> GitRepo -> FilePath -> IO ()
annexFile backends repo file = do
alreadyannexed <- lookupBackend backends repo file
case (alreadyannexed) of
Just _ -> error $ "already annexed " ++ file
Nothing -> do
stored <- storeFile backends repo file
case (stored) of
Nothing -> error $ "no backend could store " ++ file
Just key -> symlink key
where
symlink key = do
dest <- annexLoc repo key
createDirectoryIfMissing True (parentDir dest)
renameFile file dest
createSymbolicLink dest file
gitAdd repo file
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