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{- git-annex difference log
-
- Copyright 2015 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
module Logs.Difference (
recordDifferences,
recordedDifferences,
recordedDifferencesFor,
module Logs.Difference.Pure
) where
import qualified Data.Map as M
import qualified Data.Attoparsec.ByteString as A
import Data.ByteString.Builder
import Annex.Common
import Types.Difference
import qualified Annex.Branch
import Logs
import Logs.UUIDBased
import Logs.Difference.Pure
recordDifferences :: Differences -> UUID -> Annex ()
recordDifferences ds@(Differences {}) uuid = do
c <- currentVectorClock
Annex.Branch.change differenceLog $
buildLogOld byteString
. changeLog c uuid (encodeBS $ showDifferences ds)
. parseLogOld A.takeByteString
recordDifferences UnknownDifferences _ = return ()
-- Map of UUIDs that have Differences recorded.
-- If a new version of git-annex has added a Difference this version
-- doesn't know about, it will contain UnknownDifferences.
recordedDifferences :: Annex (M.Map UUID Differences)
recordedDifferences = parseDifferencesLog <$> Annex.Branch.get differenceLog
recordedDifferencesFor :: UUID -> Annex Differences
recordedDifferencesFor u = fromMaybe mempty . M.lookup u <$> recordedDifferences
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