a194e88a62
This seems like something Annex.Sim would need to happen. And generally a really good idea.
73 lines
2.2 KiB
Haskell
73 lines
2.2 KiB
Haskell
{- git-annex uuid log
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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 2010-2023 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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{-# LANGUAGE OverloadedStrings #-}
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module Logs.UUID (
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uuidLog,
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describeUUID,
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uuidDescMap,
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uuidDescMapLoad,
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uuidDescMapRaw,
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) where
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import Types.UUID
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import Annex.Common
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import Annex.VectorClock
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import qualified Annex
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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 Annex.UUID
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import qualified Data.Map.Strict as M
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import qualified Data.ByteString as B
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import qualified Data.ByteString.Lazy as L
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import qualified Data.Attoparsec.ByteString.Lazy as A
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import Data.ByteString.Builder
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import Data.Char
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{- Records a description for a uuid in the log. -}
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describeUUID :: UUID -> UUIDDesc -> Annex ()
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describeUUID uuid desc = do
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c <- currentVectorClock
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Annex.Branch.change (Annex.Branch.RegardingUUID [uuid]) uuidLog $
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buildLogOld builder . changeLog c uuid desc . parseUUIDLog
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Annex.changeState $ \s -> s { Annex.uuiddescmap = Nothing }
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where
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builder (UUIDDesc b) = byteString (escnewline b)
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-- Escape any newline in the description, since newlines cannot
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-- be present in the logged value. This is a one-way escaping.
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escnewline = B.intercalate "\\n" . B.split newline
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newline = fromIntegral (ord '\n')
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{- The map is cached for speed. -}
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uuidDescMap :: Annex UUIDDescMap
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uuidDescMap = maybe uuidDescMapLoad return =<< Annex.getState Annex.uuiddescmap
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{- Read the uuidLog into a map, and cache it for later use.
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-
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- If the current repository has not been described, it is still included
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- in the map with an empty description. -}
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uuidDescMapLoad :: Annex UUIDDescMap
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uuidDescMapLoad = do
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m <- uuidDescMapRaw
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u <- Annex.UUID.getUUID
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let m' = M.insertWith preferold u mempty m
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Annex.changeState $ \s -> s { Annex.uuiddescmap = Just m' }
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return m'
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where
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preferold = flip const
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{- Read the uuidLog into a map. Includes only actually set descriptions. -}
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uuidDescMapRaw :: Annex UUIDDescMap
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uuidDescMapRaw = simpleMap . parseUUIDLog <$> Annex.Branch.get uuidLog
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parseUUIDLog :: L.ByteString -> Log UUIDDesc
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parseUUIDLog = parseLogOld (UUIDDesc <$> A.takeByteString)
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