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.
52 lines
1.4 KiB
Haskell
52 lines
1.4 KiB
Haskell
{- git-annex activity log
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-
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- Copyright 2015-2019 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Logs.Activity (
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Log,
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Activity(..),
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recordActivity,
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lastActivities,
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) where
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import Annex.Common
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import qualified Annex.Branch
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import Logs
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import Logs.UUIDBased
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import qualified Data.ByteString as S
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import qualified Data.Attoparsec.ByteString as A
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import Data.ByteString.Builder
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data Activity
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= Fsck
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deriving (Eq, Read, Show, Enum, Bounded)
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recordActivity :: Activity -> UUID -> Annex ()
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recordActivity act uuid = do
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c <- currentVectorClock
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Annex.Branch.change activityLog $
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buildLogOld buildActivity
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. changeLog c uuid (Right act)
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. parseLogOld parseActivity
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lastActivities :: Maybe Activity -> Annex (Log Activity)
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lastActivities wantact = parseLogOld (onlywanted =<< parseActivity)
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<$> Annex.Branch.get activityLog
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where
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onlywanted (Right a) | wanted a = pure a
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onlywanted _ = fail "unwanted activity"
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wanted a = maybe True (a ==) wantact
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buildActivity :: Either S.ByteString Activity -> Builder
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buildActivity (Right a) = byteString $ encodeBS $ show a
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buildActivity (Left b) = byteString b
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-- Allow for unknown activities to be added later by preserving them.
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parseActivity :: A.Parser (Either S.ByteString Activity)
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parseActivity = go <$> A.takeByteString
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where
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go b = maybe (Left b) Right $ readish $ decodeBS b
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