60 lines
1.6 KiB
Haskell
60 lines
1.6 KiB
Haskell
{- git-annex presence log
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-
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- This is used to store presence information in the git-annex branch in
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- a way that can be union merged.
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-
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- A line of the log will look like: "date N INFO"
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- Where N=1 when the INFO is present, and 0 otherwise.
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-
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- Copyright 2010-2014 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Logs.Presence (
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module X,
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addLog,
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readLog,
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logNow,
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currentLog,
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currentLogInfo,
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historicalLogInfo,
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) where
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import Data.Time.Clock.POSIX
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import Logs.Presence.Pure as X
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import Common.Annex
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import qualified Annex.Branch
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import Git.Types (RefDate)
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addLog :: FilePath -> LogLine -> Annex ()
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addLog file line = Annex.Branch.change file $ \s ->
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showLog $ compactLog (line : parseLog s)
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{- Reads a log file.
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- Note that the LogLines returned may be in any order. -}
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readLog :: FilePath -> Annex [LogLine]
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readLog = parseLog <$$> Annex.Branch.get
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{- Generates a new LogLine with the current date. -}
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logNow :: LogStatus -> String -> Annex LogLine
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logNow s i = do
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now <- liftIO getPOSIXTime
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return $ LogLine now s i
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{- Reads a log and returns only the info that is still in effect. -}
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currentLogInfo :: FilePath -> Annex [String]
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currentLogInfo file = map info <$> currentLog file
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currentLog :: FilePath -> Annex [LogLine]
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currentLog file = filterPresent <$> readLog file
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{- Reads a historical version of a log and returns the info that was in
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- effect at that time.
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-
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- The date is formatted as shown in gitrevisions man page.
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-}
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historicalLogInfo :: RefDate -> FilePath -> Annex [String]
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historicalLogInfo refdate file = map info . filterPresent . parseLog
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<$> Annex.Branch.getHistorical refdate file
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