81 lines
2.5 KiB
Haskell
81 lines
2.5 KiB
Haskell
{- git-annex uuid log
|
|
-
|
|
- uuid.log stores a list of known uuids, and their descriptions.
|
|
-
|
|
- Copyright 2010-2012 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
module Logs.UUID (
|
|
uuidLog,
|
|
describeUUID,
|
|
uuidDescMap,
|
|
uuidDescMapLoad
|
|
) where
|
|
|
|
import Types.UUID
|
|
import Annex.Common
|
|
import Annex.VectorClock
|
|
import qualified Annex
|
|
import qualified Annex.Branch
|
|
import Logs
|
|
import Logs.UUIDBased
|
|
import qualified Annex.UUID
|
|
|
|
import qualified Data.Map.Strict as M
|
|
|
|
{- Records a description for a uuid in the log. -}
|
|
describeUUID :: UUID -> UUIDDesc -> Annex ()
|
|
describeUUID uuid desc = do
|
|
c <- liftIO currentVectorClock
|
|
Annex.Branch.change uuidLog $
|
|
showLog id . changeLog c uuid (fromUUIDDesc desc) . fixBadUUID . parseLog Just
|
|
|
|
{- Temporarily here to fix badly formatted uuid logs generated by
|
|
- versions 3.20111105 and 3.20111025.
|
|
-
|
|
- Those logs contain entries with the UUID and description flipped.
|
|
- Due to parsing, if the description is multiword, only the first
|
|
- will be taken to be the UUID. So, if the UUID of an entry does
|
|
- not look like a UUID, and the last word of the description does,
|
|
- flip them back.
|
|
-}
|
|
fixBadUUID :: Log String -> Log String
|
|
fixBadUUID = M.fromList . map fixup . M.toList
|
|
where
|
|
fixup (k, v)
|
|
| isbad = (fixeduuid, LogEntry (newertime v) fixedvalue)
|
|
| otherwise = (k, v)
|
|
where
|
|
kuuid = fromUUID k
|
|
isbad = not (isuuid kuuid) && not (null ws) && isuuid lastword
|
|
ws = words $ value v
|
|
lastword = Prelude.last ws
|
|
fixeduuid = toUUID lastword
|
|
fixedvalue = unwords $ kuuid: Prelude.init ws
|
|
-- For the fixed line to take precidence, it should be
|
|
-- slightly newer, but only slightly.
|
|
newertime (LogEntry (VectorClock c) _) = VectorClock (c + minimumPOSIXTimeSlice)
|
|
newertime (LogEntry Unknown _) = VectorClock minimumPOSIXTimeSlice
|
|
minimumPOSIXTimeSlice = 0.000001
|
|
isuuid s = length s == 36 && length (splitc '-' s) == 5
|
|
|
|
{- The map is cached for speed. -}
|
|
uuidDescMap :: Annex UUIDDescMap
|
|
uuidDescMap = maybe uuidDescMapLoad return =<< Annex.getState Annex.uuiddescmap
|
|
|
|
{- Read the uuidLog into a simple Map.
|
|
-
|
|
- The UUID of the current repository is included explicitly, since
|
|
- it may not have been described and otherwise would not appear. -}
|
|
uuidDescMapLoad :: Annex UUIDDescMap
|
|
uuidDescMapLoad = do
|
|
m <- (simpleMap . parseLog (Just . UUIDDesc . encodeBS))
|
|
<$> Annex.Branch.get uuidLog
|
|
u <- Annex.UUID.getUUID
|
|
let m' = M.insertWith preferold u mempty m
|
|
Annex.changeState $ \s -> s { Annex.uuiddescmap = Just m' }
|
|
return m'
|
|
where
|
|
preferold = flip const
|