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{- git-annex single-value log
-
- This is used to store a value in a way that can be union merged.
-
- A line of the log will look like: "timestamp value"
-
- The line with the newest timestamp wins.
-
- Copyright 2014 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Logs.SingleValue (
module Logs.SingleValue.Pure,
readLog,
getLog,
setLog,
) where
import Annex.Common
import qualified Annex.Branch
import Logs.SingleValue.Pure
import Annex.VectorClock
import qualified Data.Set as S
readLog :: (Ord v, SingleValueSerializable v) => FilePath -> Annex (Log v)
readLog = parseLog <$$> Annex.Branch.get
getLog :: (Ord v, SingleValueSerializable v) => FilePath -> Annex (Maybe v)
getLog = newestValue <$$> readLog
setLog :: (SingleValueSerializable v) => FilePath -> v -> Annex ()
setLog f v = do
c <- liftIO currentVectorClock
let ent = LogEntry c v
Annex.Branch.change f $ \_old -> buildLog (S.singleton ent)
|
