git-annex/Logs/Difference.hs
Joey Hess ec267aa1ea rejigger imports for clean build with ghc 7.10's AMP changes
The explict import Prelude after import Control.Applicative is a trick
to avoid a warning.
2015-05-10 16:20:30 -04:00

40 lines
1.2 KiB
Haskell

{- git-annex difference log
-
- Copyright 2015 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Logs.Difference (
recordDifferences,
recordedDifferences,
recordedDifferencesFor,
module Logs.Difference.Pure
) where
import Data.Time.Clock.POSIX
import qualified Data.Map as M
import Common.Annex
import Types.Difference
import qualified Annex.Branch
import Logs
import Logs.UUIDBased
import Logs.Difference.Pure
recordDifferences :: Differences -> UUID -> Annex ()
recordDifferences (Differences differences) uuid = do
ts <- liftIO getPOSIXTime
Annex.Branch.change differenceLog $
showLog id . changeLog ts uuid (show differences) . parseLog Just
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