103 lines
3 KiB
Haskell
103 lines
3 KiB
Haskell
{- git-annex numcopies log
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-
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- Copyright 2014 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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{-# OPTIONS_GHC -fno-warn-orphans #-}
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module Logs.NumCopies (
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module Types.NumCopies,
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setGlobalNumCopies,
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getGlobalNumCopies,
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globalNumCopiesLoad,
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getFileNumCopies,
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getGlobalFileNumCopies,
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getNumCopies,
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numCopiesCheck,
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deprecatedNumCopies,
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defaultNumCopies
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) where
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import Common.Annex
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import qualified Annex
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import Types.NumCopies
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import Logs
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import Logs.SingleValue
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import Logs.Trust
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import Annex.CheckAttr
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import qualified Remote
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instance SingleValueSerializable NumCopies where
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serialize (NumCopies n) = show n
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deserialize = NumCopies <$$> readish
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setGlobalNumCopies :: NumCopies -> Annex ()
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setGlobalNumCopies = setLog numcopiesLog
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{- Value configured in the numcopies log. Cached for speed. -}
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getGlobalNumCopies :: Annex (Maybe NumCopies)
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getGlobalNumCopies = maybe globalNumCopiesLoad (return . Just)
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=<< Annex.getState Annex.globalnumcopies
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globalNumCopiesLoad :: Annex (Maybe NumCopies)
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globalNumCopiesLoad = do
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v <- getLog numcopiesLog
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Annex.changeState $ \s -> s { Annex.globalnumcopies = v }
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return v
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defaultNumCopies :: NumCopies
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defaultNumCopies = NumCopies 1
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fromSources :: [Annex (Maybe NumCopies)] -> Annex NumCopies
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fromSources = fromMaybe defaultNumCopies <$$> getM id
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{- The git config annex.numcopies is deprecated. -}
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deprecatedNumCopies :: Annex (Maybe NumCopies)
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deprecatedNumCopies = annexNumCopies <$> Annex.getGitConfig
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{- Value forced on the command line by --numcopies. -}
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getForcedNumCopies :: Annex (Maybe NumCopies)
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getForcedNumCopies = Annex.getState Annex.forcenumcopies
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{- Numcopies value from any of the non-.gitattributes configuration
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- sources. -}
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getNumCopies :: Annex NumCopies
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getNumCopies = fromSources
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[ getForcedNumCopies
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, getGlobalNumCopies
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, deprecatedNumCopies
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]
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{- Numcopies value for a file, from any configuration source, including the
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- deprecated git config. -}
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getFileNumCopies :: FilePath -> Annex NumCopies
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getFileNumCopies f = fromSources
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[ getForcedNumCopies
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, getFileNumCopies' f
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, deprecatedNumCopies
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]
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{- This is the globally visible numcopies value for a file. So it does
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- not include local configuration in the git config or command line
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- options. -}
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getGlobalFileNumCopies :: FilePath -> Annex NumCopies
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getGlobalFileNumCopies f = fromSources
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[ getFileNumCopies' f
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]
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getFileNumCopies' :: FilePath -> Annex (Maybe NumCopies)
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getFileNumCopies' file = maybe getGlobalNumCopies (return . Just) =<< getattr
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where
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getattr = (NumCopies <$$> readish)
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<$> checkAttr "annex.numcopies" file
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{- Checks if numcopies are satisfied for a file by running a comparison
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- between the number of (not untrusted) copies that are
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- belived to exist, and the configured value. -}
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numCopiesCheck :: FilePath -> Key -> (Int -> Int -> v) -> Annex v
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numCopiesCheck file key vs = do
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NumCopies needed <- getFileNumCopies file
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have <- trustExclude UnTrusted =<< Remote.keyLocations key
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return $ length have `vs` needed
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