45 lines
1.2 KiB
Haskell
45 lines
1.2 KiB
Haskell
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{- This is not the same as git's fetch/push refspecs.
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-
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- Copyright 2015 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.RefSpec where
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import Common
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import Utility.Glob
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import Git.Types
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import Data.Either
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type RefSpec = [RefSpecPart]
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data RefSpecPart = AddRef Ref | AddMatching Glob | RemoveMatching Glob
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allRefSpec :: RefSpec
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allRefSpec = [AddMatching $ compileGlob "*" CaseSensative]
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parseRefSpec :: String -> Either String RefSpec
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parseRefSpec v = case partitionEithers (map mk $ split ":" v) of
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([],refspec) -> Right refspec
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(e:_,_) -> Left e
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where
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mk ('+':s)
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| any (`elem` s) "*?" =
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Right $ AddMatching $ compileGlob s CaseSensative
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| otherwise = Right $ AddRef $ Ref s
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mk ('-':s) = Right $ RemoveMatching $ compileGlob s CaseSensative
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mk s = Left $ "bad refspec item \"" ++ s ++ "\" (expected + or - prefix)"
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applyRefSpec :: RefSpec -> [Ref] -> [Ref]
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applyRefSpec refspec rs = go [] refspec
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where
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go c [] = reverse c
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go c (AddRef r : rest) = go (r:c) rest
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go c (AddMatching g : rest) =
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let add = filter (matchGlob g . fromRef) rs
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in go (add ++ c) rest
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go c (RemoveMatching g : rest) =
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go (filter (not . matchGlob g . fromRef) c) rest
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