40ecf58d4b
This does not change the overall license of the git-annex program, which was already AGPL due to a number of sources files being AGPL already. Legally speaking, I'm adding a new license under which these files are now available; I already released their current contents under the GPL license. Now they're dual licensed GPL and AGPL. However, I intend for all my future changes to these files to only be released under the AGPL license, and I won't be tracking the dual licensing status, so I'm simply changing the license statement to say it's AGPL. (In some cases, others wrote parts of the code of a file and released it under the GPL; but in all cases I have contributed a significant portion of the code in each file and it's that code that is getting the AGPL license; the GPL license of other contributors allows combining with AGPL code.)
52 lines
1.4 KiB
Haskell
52 lines
1.4 KiB
Haskell
{- 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 AGPL 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
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= AddRef Ref
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| AddMatching Glob
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| AddRefLog
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| 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 $ splitc ':' 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 "reflog" = Right AddRefLog
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mk s = Left $ "bad refspec item \"" ++ s ++ "\" (expected + or - prefix)"
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applyRefSpec :: Monad m => RefSpec -> [Ref] -> m [Sha] -> m [Ref]
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applyRefSpec refspec rs getreflog = go [] refspec
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where
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go c [] = return (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 (AddRefLog : rest) = do
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reflog <- getreflog
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go (reflog ++ 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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