53 lines
1.5 KiB
Haskell
53 lines
1.5 KiB
Haskell
{- git-annex file matcher types
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-
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- Copyright 2013-2016 Joey Hess <id@joeyh.name>
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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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module Types.FileMatcher where
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import Types.UUID (UUID)
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import Types.Key (Key)
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import Utility.Matcher (Matcher, Token)
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import Utility.FileSize
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import Control.Monad.IO.Class
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import qualified Data.Map as M
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import qualified Data.Set as S
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data MatchInfo
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= MatchingFile FileInfo
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| MatchingKey Key
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| MatchingInfo (OptInfo FilePath) (OptInfo Key) (OptInfo FileSize)
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data FileInfo = FileInfo
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{ currFile :: FilePath
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-- ^ current path to the file, for operations that examine it
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, matchFile :: FilePath
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-- ^ filepath to match on; may be relative to top of repo or cwd
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}
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type OptInfo a = Either (IO a) a
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-- If the OptInfo is not available, accessing it may result in eg an
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-- exception being thrown.
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getInfo :: MonadIO m => OptInfo a -> m a
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getInfo (Right i) = return i
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getInfo (Left e) = liftIO e
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type FileMatcherMap a = M.Map UUID (Utility.Matcher.Matcher (S.Set UUID -> MatchInfo -> a Bool))
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type MkLimit a = String -> Either String (MatchFiles a)
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type AssumeNotPresent = S.Set UUID
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type MatchFiles a = AssumeNotPresent -> MatchInfo -> a Bool
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type FileMatcher a = Matcher (MatchFiles a)
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-- This is a matcher that can have tokens added to it while it's being
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-- built, and once complete is compiled to an unchangable matcher.
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data ExpandableMatcher a
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= BuildingMatcher [Token (MatchInfo -> a Bool)]
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| CompleteMatcher (Matcher (MatchInfo -> a Bool))
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