git-annex/Logs/Config.hs
Joey Hess bfc9039ead
convert git-annex branch access to ByteStrings and Builders
Most of the individual logs are not converted yet, only presense logs
have an efficient ByteString Builder implemented so far. The rest
convert to and from String.
2019-01-03 13:21:48 -04:00

54 lines
1.5 KiB
Haskell

{- git-annex repository-global config log
-
- Copyright 2017 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Logs.Config (
ConfigName,
ConfigValue,
setGlobalConfig,
unsetGlobalConfig,
getGlobalConfig,
loadGlobalConfig,
) where
import Annex.Common
import Logs
import Logs.MapLog
import qualified Annex.Branch
import qualified Data.Map as M
type ConfigName = String
type ConfigValue = String
setGlobalConfig :: ConfigName -> ConfigValue -> Annex ()
setGlobalConfig name new = do
curr <- getGlobalConfig name
when (curr /= Just new) $
setGlobalConfig' name new
setGlobalConfig' :: ConfigName -> ConfigValue -> Annex ()
setGlobalConfig' name new = do
c <- liftIO currentVectorClock
Annex.Branch.change configLog $
encodeBL . showMapLog id id . changeMapLog c name new . parseGlobalConfig . decodeBL
unsetGlobalConfig :: ConfigName -> Annex ()
unsetGlobalConfig name = do
curr <- getGlobalConfig name
when (curr /= Nothing) $
setGlobalConfig' name "" -- set to empty string to unset
-- Reads the global config log every time.
getGlobalConfig :: ConfigName -> Annex (Maybe ConfigValue)
getGlobalConfig name = M.lookup name <$> loadGlobalConfig
parseGlobalConfig :: String -> MapLog ConfigName ConfigValue
parseGlobalConfig = parseMapLog Just Just
loadGlobalConfig :: Annex (M.Map ConfigName ConfigValue)
loadGlobalConfig = M.filter (not . null) . simpleMap . parseGlobalConfig . decodeBL
<$> Annex.Branch.get configLog