a818bc5e73
Does not yet have a way to update with new information from the git-annex branch, which will be needed when multiple repos are importing from the same remote.
56 lines
1.5 KiB
Haskell
56 lines
1.5 KiB
Haskell
{- Remote content identifier logs, pure operations.
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-
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- Copyright 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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{-# LANGUAGE OverloadedStrings #-}
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module Logs.ContentIdentifier.Pure
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( ContentIdentifierLog
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, parseLog
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, buildLog
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) where
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import Annex.Common
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import Logs.MapLog
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import Types.Remote (ContentIdentifier(..))
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import Utility.Base64
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import qualified Data.ByteString as S
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import qualified Data.ByteString.Char8 as S8
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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 qualified Data.Attoparsec.ByteString.Char8 as A8
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import Data.ByteString.Builder
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type ContentIdentifierLog = MapLog UUID [ContentIdentifier]
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buildLog :: ContentIdentifierLog -> Builder
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buildLog = buildMapLog buildUUID valuebuilder
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where
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valuebuilder [] = mempty
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valuebuilder [c] = buildcid c
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valuebuilder (c:cs) = buildcid c <> charUtf8 ' ' <> valuebuilder cs
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buildcid (ContentIdentifier c)
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| S8.any (`elem` [' ', '\r', '\n']) c || "!" `S8.isPrefixOf` c =
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charUtf8 '!' <> byteString (toB64' c)
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| otherwise = byteString c
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parseLog :: L.ByteString -> ContentIdentifierLog
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parseLog = parseMapLog
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(toUUID <$> A.takeByteString)
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(reverse . catMaybes <$> valueparser [])
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where
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valueparser l = do
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b <- A8.takeWhile1 (/= ' ')
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let cid = if "!" `S8.isPrefixOf` b
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then ContentIdentifier <$> fromB64Maybe' (S.drop 1 b)
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else Just $ ContentIdentifier b
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ifM A8.atEnd
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( return (cid:l)
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, do
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_ <- A8.char ' '
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valueparser (cid:l)
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)
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