c7c2015435
Monitors git-annex branch for changes, which are noticed by the Merger thread whenever the branch ref is changed (either due to an incoming push, or a local change), and refreshes cached config values for modified config files. Rate limited to run no more often than once per minute. This is important because frequent git-annex branch changes happen when files are being added, or transferred, etc. A primary use case is that, when preferred content changes are made, and get pushed to remotes, the remotes start honoring those settings. Other use cases include propigating repository description and trust changes to remotes, and learning when a remote has added a new special remote, so the webapp can present the GUI to enable that special remote locally. Also added a uuid.log cache. All other config files already had caches.
111 lines
3.2 KiB
Haskell
111 lines
3.2 KiB
Haskell
{- git-annex trust log
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-
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- Copyright 2010-2012 Joey Hess <joey@kitenet.net>
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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 Logs.Trust (
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trustLog,
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TrustLevel(..),
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trustGet,
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trustSet,
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trustPartition,
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lookupTrust,
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trustMapLoad,
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trustMapRaw,
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) where
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import qualified Data.Map as M
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import Data.Time.Clock.POSIX
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import Common.Annex
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import Types.TrustLevel
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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 Remote.List
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import Config
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import qualified Types.Remote
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{- Filename of trust.log. -}
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trustLog :: FilePath
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trustLog = "trust.log"
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{- Returns a list of UUIDs that the trustLog indicates have the
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- specified trust level.
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- Note that the list can be incomplete for SemiTrusted, since that's
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- the default. -}
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trustGet :: TrustLevel -> Annex [UUID]
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trustGet level = M.keys . M.filter (== level) <$> trustMap
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{- Changes the trust level for a uuid in the trustLog. -}
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trustSet :: UUID -> TrustLevel -> Annex ()
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trustSet uuid@(UUID _) level = do
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ts <- liftIO getPOSIXTime
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Annex.Branch.change trustLog $
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showLog showTrustLog .
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changeLog ts uuid level .
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parseLog (Just . parseTrustLog)
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Annex.changeState $ \s -> s { Annex.trustmap = Nothing }
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trustSet NoUUID _ = error "unknown UUID; cannot modify"
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{- Returns the TrustLevel of a given repo UUID. -}
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lookupTrust :: UUID -> Annex TrustLevel
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lookupTrust u = (fromMaybe SemiTrusted . M.lookup u) <$> trustMap
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{- Partitions a list of UUIDs to those matching a TrustLevel and not. -}
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trustPartition :: TrustLevel -> [UUID] -> Annex ([UUID], [UUID])
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trustPartition level ls
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| level == SemiTrusted = do
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t <- trustGet Trusted
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u <- trustGet UnTrusted
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d <- trustGet DeadTrusted
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let uncandidates = t ++ u ++ d
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return $ partition (`notElem` uncandidates) ls
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| otherwise = do
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candidates <- trustGet level
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return $ partition (`elem` candidates) ls
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{- trustLog in a map, overridden with any values from forcetrust or
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- the git config. The map is cached for speed. -}
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trustMap :: Annex TrustMap
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trustMap = maybe trustMapLoad return =<< Annex.getState Annex.trustmap
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{- Loads the map, updating the cache, -}
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trustMapLoad :: Annex TrustMap
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trustMapLoad = do
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overrides <- Annex.getState Annex.forcetrust
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logged <- trustMapRaw
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configured <- M.fromList . catMaybes
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<$> (mapM configuredtrust =<< remoteList)
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let m = M.union overrides $ M.union configured logged
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Annex.changeState $ \s -> s { Annex.trustmap = Just m }
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return m
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where
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configuredtrust r =
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maybe Nothing (\l -> Just (Types.Remote.uuid r, l)) <$>
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maybe Nothing readTrustLevel
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<$> getTrustLevel (Types.Remote.repo r)
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{- Does not include forcetrust or git config values, just those from the
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- log file. -}
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trustMapRaw :: Annex TrustMap
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trustMapRaw = simpleMap . parseLog (Just . parseTrustLog)
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<$> Annex.Branch.get trustLog
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{- The trust.log used to only list trusted repos, without a field for the
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- trust status, which is why this defaults to Trusted. -}
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parseTrustLog :: String -> TrustLevel
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parseTrustLog s = maybe Trusted parse $ headMaybe $ words s
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where
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parse "1" = Trusted
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parse "0" = UnTrusted
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parse "X" = DeadTrusted
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parse _ = SemiTrusted
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showTrustLog :: TrustLevel -> String
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showTrustLog Trusted = "1"
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showTrustLog UnTrusted = "0"
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showTrustLog DeadTrusted = "X"
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showTrustLog SemiTrusted = "?"
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