81d402216d
This will speed up the common case where a Key is deserialized from disk, but is then serialized to build eg, the path to the annex object. Previously attempted in4536c93bb2and reverted in96aba8eff7. The problems mentioned in the latter commit are addressed now: Read/Show of KeyData is backwards-compatible with Read/Show of Key from before this change, so Types.Distribution will keep working. The Eq instance is fixed. Also, Key has smart constructors, avoiding needing to remember to update the cached serialization. Used git-annex benchmark: find is 7% faster whereis is 3% faster get when all files are already present is 5% faster Generally, the benchmarks are running 0.1 seconds faster per 2000 files, on a ram disk in my laptop.
80 lines
2.4 KiB
Haskell
80 lines
2.4 KiB
Haskell
{- Data type for a distribution of git-annex
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-
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- Copyright 2013, 2017 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 Types.Distribution where
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import Utility.PartialPrelude
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import Utility.Split
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import Types.Key
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import Key
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import Data.Time.Clock
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import Git.Config (isTrue, boolConfig)
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import Control.Applicative
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import Prelude
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type GitAnnexVersion = String
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data GitAnnexDistribution = GitAnnexDistribution
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{ distributionUrl :: String
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, distributionKey :: KeyData
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-- ^ This used to be a Key, but now KeyData serializes
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-- to Key { ... }, so back-compat for Read and Show is preserved.
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, distributionVersion :: GitAnnexVersion
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, distributionReleasedate :: UTCTime
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, distributionUrgentUpgrade :: Maybe GitAnnexVersion
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}
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deriving (Read, Show, Eq)
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{- The first line of the info file is in the format old versions of
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- git-annex expect to read a GitAnnexDistribution.
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- The remainder of the file is in the new format.
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- This works because old versions of git-annex used readish to parse
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- the file, and that ignores the second line.
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-}
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formatInfoFile :: GitAnnexDistribution -> String
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formatInfoFile d = replace "keyVariant = " "keyBackendName = " (show d) ++
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"\n" ++ formatGitAnnexDistribution d
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parseInfoFile :: String -> Maybe GitAnnexDistribution
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parseInfoFile s = case lines s of
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(_oldformat:rest) -> parseGitAnnexDistribution (unlines rest)
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_ -> Nothing
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formatGitAnnexDistribution :: GitAnnexDistribution -> String
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formatGitAnnexDistribution d = unlines
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[ distributionUrl d
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, serializeKey $ mkKey $ const $ distributionKey d
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, distributionVersion d
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, show (distributionReleasedate d)
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, maybe "" show (distributionUrgentUpgrade d)
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]
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parseGitAnnexDistribution :: String -> Maybe GitAnnexDistribution
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parseGitAnnexDistribution s = case lines s of
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(u:k:v:d:uu:_) -> GitAnnexDistribution
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<$> pure u
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<*> fmap (fromKey id) (deserializeKey k)
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<*> pure v
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<*> readish d
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<*> pure (readish uu)
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_ -> Nothing
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data AutoUpgrade = AskUpgrade | AutoUpgrade | NoAutoUpgrade
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deriving (Eq)
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toAutoUpgrade :: Maybe String -> AutoUpgrade
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toAutoUpgrade Nothing = AskUpgrade
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toAutoUpgrade (Just s)
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| s == "ask" = AskUpgrade
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| isTrue s == Just True = AutoUpgrade
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| otherwise = NoAutoUpgrade
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fromAutoUpgrade :: AutoUpgrade -> String
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fromAutoUpgrade AskUpgrade = "ask"
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fromAutoUpgrade AutoUpgrade = boolConfig True
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fromAutoUpgrade NoAutoUpgrade = boolConfig False
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