6280af2901
Especially from borg, where the content identifier logs all end up being the same identical file! But also, for other imports, the location tracking logs can, in some cases, be identical files. Bonus optimisation: Avoid looking up (and parsing when set) GIT_ANNEX_VECTOR_CLOCK env var every time a log is written to. Although the lookup does happen at startup even when no log will be written now.
43 lines
1.1 KiB
Haskell
43 lines
1.1 KiB
Haskell
{- git-annex multicast fingerprint log
|
|
-
|
|
- Copyright 2017, 2019 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
module Logs.Multicast (
|
|
Fingerprint(..),
|
|
recordFingerprint,
|
|
knownFingerPrints,
|
|
) where
|
|
|
|
import Annex.Common
|
|
import qualified Annex.Branch
|
|
import Logs
|
|
import Logs.UUIDBased
|
|
|
|
import qualified Data.Map as M
|
|
import qualified Data.Attoparsec.ByteString.Lazy as A
|
|
import Data.ByteString.Builder
|
|
|
|
newtype Fingerprint = Fingerprint String
|
|
deriving (Eq, Read, Show)
|
|
|
|
recordFingerprint :: Fingerprint -> UUID -> Annex ()
|
|
recordFingerprint fp uuid = do
|
|
c <- currentVectorClock
|
|
Annex.Branch.change multicastLog $
|
|
buildLogOld buildFindgerPrint
|
|
. changeLog c uuid fp
|
|
. parseLogOld fingerprintParser
|
|
|
|
knownFingerPrints :: Annex (M.Map UUID Fingerprint)
|
|
knownFingerPrints = simpleMap . parseLogOld fingerprintParser
|
|
<$> Annex.Branch.get activityLog
|
|
|
|
fingerprintParser :: A.Parser Fingerprint
|
|
fingerprintParser = maybe (fail "fingerprint parse failed") pure
|
|
. readish . decodeBS =<< A.takeByteString
|
|
|
|
buildFindgerPrint :: Fingerprint -> Builder
|
|
buildFindgerPrint = byteString . encodeBS . show
|