116 lines
3.9 KiB
Haskell
116 lines
3.9 KiB
Haskell
{- git-annex file matching
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-
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- Copyright 2012-2014 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 Annex.FileMatcher where
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import qualified Data.Map as M
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import Common.Annex
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import Limit
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import Utility.Matcher
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import Types.Group
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import Logs.Group
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import Logs.Remote
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import Annex.UUID
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import qualified Annex
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import Types.FileMatcher
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import Git.FilePath
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import Types.Remote (RemoteConfig)
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import Data.Either
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import qualified Data.Set as S
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checkFileMatcher :: (FileMatcher Annex) -> FilePath -> Annex Bool
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checkFileMatcher matcher file = checkMatcher matcher Nothing (Just file) S.empty True
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checkMatcher :: (FileMatcher Annex) -> Maybe Key -> AssociatedFile -> AssumeNotPresent -> Bool -> Annex Bool
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checkMatcher matcher mkey afile notpresent d
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| isEmpty matcher = return d
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| otherwise = case (mkey, afile) of
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(_, Just file) -> go =<< fileMatchInfo file
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(Just key, _) -> go (MatchingKey key)
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_ -> return d
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where
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go mi = matchMrun matcher $ \a -> a notpresent mi
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fileMatchInfo :: FilePath -> Annex MatchInfo
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fileMatchInfo file = do
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matchfile <- getTopFilePath <$> inRepo (toTopFilePath file)
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return $ MatchingFile FileInfo
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{ matchFile = matchfile
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, currFile = file
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}
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matchAll :: FileMatcher Annex
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matchAll = generate []
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parsedToMatcher :: [Either String (Token (MatchFiles Annex))] -> Either String (FileMatcher Annex)
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parsedToMatcher parsed = case partitionEithers parsed of
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([], vs) -> Right $ generate vs
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(es, _) -> Left $ unwords $ map ("Parse failure: " ++) es
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exprParser :: FileMatcher Annex -> FileMatcher Annex -> GroupMap -> M.Map UUID RemoteConfig -> Maybe UUID -> String -> [Either String (Token (MatchFiles Annex))]
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exprParser matchstandard matchgroupwanted groupmap configmap mu expr =
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map parse $ tokenizeMatcher expr
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where
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parse = parseToken
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matchstandard
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matchgroupwanted
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(limitPresent mu)
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(limitInDir preferreddir)
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groupmap
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preferreddir = fromMaybe "public" $
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M.lookup "preferreddir" =<< (`M.lookup` configmap) =<< mu
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parseToken :: FileMatcher Annex -> FileMatcher Annex -> MkLimit Annex -> MkLimit Annex -> GroupMap -> String -> Either String (Token (MatchFiles Annex))
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parseToken matchstandard matchgroupwanted checkpresent checkpreferreddir groupmap t
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| t `elem` tokens = Right $ token t
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| t == "standard" = call matchstandard
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| t == "groupwanted" = call matchgroupwanted
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| t == "present" = use checkpresent
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| t == "inpreferreddir" = use checkpreferreddir
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| t == "unused" = Right $ Operation limitUnused
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| otherwise = maybe (Left $ "near " ++ show t) use $ M.lookup k $
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M.fromList
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[ ("include", limitInclude)
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, ("exclude", limitExclude)
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, ("copies", limitCopies)
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, ("lackingcopies", limitLackingCopies False)
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, ("approxlackingcopies", limitLackingCopies True)
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, ("inbackend", limitInBackend)
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, ("largerthan", limitSize (>))
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, ("smallerthan", limitSize (<))
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, ("metadata", limitMetaData)
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, ("inallgroup", limitInAllGroup groupmap)
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]
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where
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(k, v) = separate (== '=') t
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use a = Operation <$> a v
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call sub = Right $ Operation $ \notpresent mi ->
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matchMrun sub $ \a -> a notpresent mi
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{- This is really dumb tokenization; there's no support for quoted values.
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- Open and close parens are always treated as standalone tokens;
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- otherwise tokens must be separated by whitespace. -}
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tokenizeMatcher :: String -> [String]
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tokenizeMatcher = filter (not . null ) . concatMap splitparens . words
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where
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splitparens = segmentDelim (`elem` "()")
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{- Generates a matcher for files large enough (or meeting other criteria)
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- to be added to the annex, rather than directly to git. -}
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largeFilesMatcher :: Annex (FileMatcher Annex)
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largeFilesMatcher = go =<< annexLargeFiles <$> Annex.getGitConfig
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where
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go Nothing = return matchAll
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go (Just expr) = do
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gm <- groupMap
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rc <- readRemoteLog
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u <- getUUID
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either badexpr return $
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parsedToMatcher $ exprParser matchAll matchAll gm rc (Just u) expr
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badexpr e = error $ "bad annex.largefiles configuration: " ++ e
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