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.)
99 lines
2.9 KiB
Haskell
99 lines
2.9 KiB
Haskell
{- git-annex group log
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-
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- Copyright 2012, 2019 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 Logs.Group (
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groupLog,
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groupChange,
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groupSet,
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lookupGroups,
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groupMap,
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groupMapLoad,
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getStandardGroup,
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inUnwantedGroup
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) where
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import qualified Data.Map as M
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import qualified Data.Set as S
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import qualified Data.Attoparsec.ByteString as A
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import qualified Data.Attoparsec.ByteString.Char8 as A8
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import Data.ByteString.Builder
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import Annex.Common
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import Logs
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import qualified Annex.Branch
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import qualified Annex
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import Logs.UUIDBased
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import Types.Group
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import Types.StandardGroups
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{- Returns the groups of a given repo UUID. -}
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lookupGroups :: UUID -> Annex (S.Set Group)
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lookupGroups u = (fromMaybe S.empty . M.lookup u) . groupsByUUID <$> groupMap
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{- Applies a set modifier to change the groups for a uuid in the groupLog. -}
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groupChange :: UUID -> (S.Set Group -> S.Set Group) -> Annex ()
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groupChange uuid@(UUID _) modifier = do
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curr <- lookupGroups uuid
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c <- liftIO currentVectorClock
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Annex.Branch.change groupLog $
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buildLogOld buildGroup . changeLog c uuid (modifier curr) . parseLogOld parseGroup
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-- The changed group invalidates the preferred content cache.
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Annex.changeState $ \s -> s
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{ Annex.groupmap = Nothing
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, Annex.preferredcontentmap = Nothing
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}
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groupChange NoUUID _ = error "unknown UUID; cannot modify"
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buildGroup :: S.Set Group -> Builder
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buildGroup = go . S.toList
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where
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go [] = mempty
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go (g:gs) = bld g <> mconcat [ charUtf8 ' ' <> bld g' | g' <- gs ]
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bld (Group g) = byteString g
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parseGroup :: A.Parser (S.Set Group)
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parseGroup = S.fromList <$> go []
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where
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go l = (A.endOfInput *> pure l)
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<|> ((getgroup <* A8.char ' ') >>= go . (:l))
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<|> ((:l) <$> getgroup)
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-- allow extra writespace before or after a group name
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<|> (A8.char ' ' >>= const (go l))
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getgroup = Group <$> A8.takeWhile1 (/= ' ')
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groupSet :: UUID -> S.Set Group -> Annex ()
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groupSet u g = groupChange u (const g)
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{- The map is cached for speed. -}
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groupMap :: Annex GroupMap
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groupMap = maybe groupMapLoad return =<< Annex.getState Annex.groupmap
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{- Loads the map, updating the cache. -}
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groupMapLoad :: Annex GroupMap
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groupMapLoad = do
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m <- makeGroupMap . simpleMap . parseLogOld parseGroup
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<$> Annex.Branch.get groupLog
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Annex.changeState $ \s -> s { Annex.groupmap = Just m }
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return m
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makeGroupMap :: M.Map UUID (S.Set Group) -> GroupMap
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makeGroupMap byuuid = GroupMap byuuid bygroup
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where
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bygroup = M.fromListWith S.union $
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concatMap explode $ M.toList byuuid
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explode (u, s) = map (\g -> (g, S.singleton u)) (S.toList s)
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{- If a repository is in exactly one standard group, returns it. -}
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getStandardGroup :: S.Set Group -> Maybe StandardGroup
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getStandardGroup s = case mapMaybe toStandardGroup $ S.toList s of
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[g] -> Just g
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_ -> Nothing
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inUnwantedGroup :: UUID -> Annex Bool
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inUnwantedGroup u = elem UnwantedGroup
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. mapMaybe toStandardGroup . S.toList <$> lookupGroups u
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