git-annex/Git/Index.hs

32 lines
654 B
Haskell

{- git index file stuff
-
- Copyright 2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Git.Index where
import Common
import Git
import Utility.Env
{- Forces git to use the specified index file.
-
- Returns an action that will reset back to the default
- index file.
-
- Warning: Not thread safe.
-}
override :: FilePath -> IO (IO ())
override index = do
res <- getEnv var
void $ setEnv var index True
return $ void $ reset res
where
var = "GIT_INDEX_FILE"
reset (Just v) = setEnv var v True
reset _ = unsetEnv var
indexFile :: Repo -> FilePath
indexFile r = localGitDir r </> "index"