71 lines
1.8 KiB
Haskell
71 lines
1.8 KiB
Haskell
{- git-annex uuids
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-
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- Each git repository used by git-annex has an annex.uuid setting that
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- uniquely identifies that repository.
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-
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- UUIDs of remotes are cached in git config, using keys named
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- remote.<name>.annex-uuid
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-
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- uuid.log stores a list of known uuids, and their descriptions.
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-
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- Copyright 2010-2012 Joey Hess <joey@kitenet.net>
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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.UUID (
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uuidLog,
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describeUUID,
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recordUUID,
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uuidMap,
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uuidMapLoad
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) where
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import qualified Data.Map as M
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import Data.Time.Clock.POSIX
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import Types.UUID
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import Common.Annex
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import qualified Annex
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import qualified Annex.Branch
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import Logs.UUIDBased
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import qualified Annex.UUID
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{- Filename of uuid.log. -}
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uuidLog :: FilePath
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uuidLog = "uuid.log"
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{- Records a description for a uuid in the log. -}
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describeUUID :: UUID -> String -> Annex ()
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describeUUID uuid desc = do
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ts <- liftIO getPOSIXTime
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Annex.Branch.change uuidLog $
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showLog id . changeLog ts uuid desc . parseLog Just
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{- Records the uuid in the log, if it's not already there. -}
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recordUUID :: UUID -> Annex ()
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recordUUID u = go . M.lookup u =<< uuidMap
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where
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go (Just "") = set
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go Nothing = set
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go _ = noop
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set = describeUUID u ""
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{- The map is cached for speed. -}
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uuidMap :: Annex UUIDMap
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uuidMap = maybe uuidMapLoad return =<< Annex.getState Annex.uuidmap
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{- Read the uuidLog into a simple Map.
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-
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- The UUID of the current repository is included explicitly, since
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- it may not have been described and so otherwise would not appear. -}
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uuidMapLoad :: Annex UUIDMap
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uuidMapLoad = do
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m <- (simpleMap . parseLog Just)
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<$> Annex.Branch.get uuidLog
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m' <- maybe m (\u -> M.insertWith' preferold u "" m)
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<$> Annex.UUID.getUUID
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Annex.changeState $ \s -> s { Annex.uuidmap = Just m' }
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return m'
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where
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preferold = flip const
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