1 files changed, 32 insertions, 0 deletions
diff --git a/Git/Index.hs b/Git/Index.hs
new file mode 100644
index 0000000..d9d5b03
--- /dev/null
+++ b/Git/Index.hs
@@ -0,0 +1,32 @@
+{- 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"