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{- 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 System.Posix.Env (setEnv, unsetEnv, getEnv)
{- 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
setEnv var index True
return $ reset res
where
var = "GIT_INDEX_FILE"
reset (Just v) = setEnv var v True
reset _ = unsetEnv var
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