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{- git-annex presence log
-
- This is used to store presence information in the git-annex branch in
- a way that can be union merged.
-
- A line of the log will look like: "date N INFO"
- Where N=1 when the INFO is present, and 0 otherwise.
-
- Copyright 2010-2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Logs.Presence (
module X,
addLog,
readLog,
logNow,
currentLog
) where
import Data.Time.Clock.POSIX
import Logs.Presence.Pure as X
import Common.Annex
import qualified Annex.Branch
addLog :: FilePath -> LogLine -> Annex ()
addLog file line = Annex.Branch.change file $ \s ->
showLog $ compactLog (line : parseLog s)
{- Reads a log file.
- Note that the LogLines returned may be in any order. -}
readLog :: FilePath -> Annex [LogLine]
readLog = parseLog <$$> Annex.Branch.get
{- Generates a new LogLine with the current date. -}
logNow :: LogStatus -> String -> Annex LogLine
logNow s i = do
now <- liftIO getPOSIXTime
return $ LogLine now s i
{- Reads a log and returns only the info that is still in effect. -}
currentLog :: FilePath -> Annex [String]
currentLog file = map info . filterPresent <$> readLog file
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