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|
{- git-annex group log
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Logs.Group (
groupSet,
lookupGroups,
groupMap,
) where
import qualified Data.Map as M
import qualified Data.Set as S
import Data.Time.Clock.POSIX
import Common.Annex
import qualified Annex.Branch
import qualified Annex
import Logs.UUIDBased
import Types.Group
{- Filename of group.log. -}
groupLog :: FilePath
groupLog = "group.log"
{- Returns the groups of a given repo UUID. -}
lookupGroups :: UUID -> Annex (S.Set Group)
lookupGroups u = (fromMaybe S.empty . M.lookup u) <$> groupMap
{- Changes the groups for a uuid in the groupLog. -}
groupSet :: UUID -> S.Set Group -> Annex ()
groupSet uuid@(UUID _) groups = do
ts <- liftIO getPOSIXTime
Annex.Branch.change groupLog $
showLog (unwords . S.toList) . changeLog ts uuid groups .
parseLog (Just . S.fromList . words)
Annex.changeState $ \s -> s { Annex.groupmap = Nothing }
groupSet NoUUID _ = error "unknown UUID; cannot modify group"
{- Read the groupLog into a map. The map is cached for speed. -}
groupMap :: Annex GroupMap
groupMap = do
cached <- Annex.getState Annex.groupmap
case cached of
Just m -> return m
Nothing -> do
m <- simpleMap . parseLog (Just . S.fromList . words) <$>
Annex.Branch.get groupLog
Annex.changeState $ \s -> s { Annex.groupmap = Just m }
return m
|
