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{- git check-attr interface, with handle automatically stored in the Annex monad
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}

module Annex.CheckAttr (
checkAttr,
checkAttrHandle
) where

import Common.Annex
import qualified Git.CheckAttr as Git
import qualified Annex

{- All gitattributes used by git-annex. -}
annexAttrs :: [Git.Attr]
annexAttrs =
[ "annex.backend"
, "annex.numcopies"
]

checkAttr :: Git.Attr -> FilePath -> Annex String
checkAttr attr file = do
h <- checkAttrHandle
liftIO $ Git.checkAttr h attr file

checkAttrHandle :: Annex Git.CheckAttrHandle
checkAttrHandle = maybe startup return =<< Annex.getState Annex.checkattrhandle
where
startup = do
h <- inRepo $ Git.checkAttrStart annexAttrs
Annex.changeState $ \s -> s { Annex.checkattrhandle = Just h }
return h
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