67 lines
1.6 KiB
Haskell
67 lines
1.6 KiB
Haskell
{- git-annex trust
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-
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- Copyright 2010 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 Trust (
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TrustLevel(..),
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trustLog,
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trustGet,
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trustMap,
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trustMapParse,
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trustSet
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) where
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import Control.Monad.State
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import qualified Data.Map as M
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import TrustLevel
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import qualified Branch
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import Types
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import UUID
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import qualified Annex
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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 at the specified trust level. -}
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trustGet :: TrustLevel -> Annex [UUID]
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trustGet level = do
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m <- trustMap
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return $ M.keys $ M.filter (== level) m
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{- Read the trustLog into a map, overriding with any
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- values from forcetrust -}
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trustMap :: Annex (M.Map UUID TrustLevel)
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trustMap = do
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overrides <- Annex.getState Annex.forcetrust
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s <- Branch.get trustLog
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return $ M.fromList $ trustMapParse s ++ overrides
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{- Trust map parser. -}
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trustMapParse :: String -> [(UUID, TrustLevel)]
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trustMapParse s = map pair $ filter (not . null) $ lines s
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where
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pair l
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| length w > 1 = (w !! 0, read (w !! 1) :: TrustLevel)
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-- for back-compat; the trust log used to only
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-- list trusted uuids
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| otherwise = (w !! 0, Trusted)
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where
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w = words l
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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 level = do
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when (null uuid) $
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error "unknown UUID; cannot modify trust level"
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m <- trustMap
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when (M.lookup uuid m /= Just level) $ do
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let m' = M.insert uuid level m
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Branch.change trustLog (serialize m')
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where
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serialize m = unlines $ map showpair $ M.toList m
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showpair (u, t) = u ++ " " ++ show t
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