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|
{- git-annex trust
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Trust (
TrustLevel(..),
trustLog,
trustGet,
trustMap,
trustMapParse,
trustSet
) where
import Control.Monad.State
import qualified Data.Map as M
import TrustLevel
import qualified GitRepo as Git
import Types
import UUID
import Locations
import qualified Annex
import Utility
{- Filename of trust.log. -}
trustLog :: Annex FilePath
trustLog = do
g <- Annex.gitRepo
return $ gitStateDir g ++ "trust.log"
{- Returns a list of UUIDs at the specified trust level. -}
trustGet :: TrustLevel -> Annex [UUID]
trustGet level = do
m <- trustMap
return $ M.keys $ M.filter (== level) m
{- Read the trustLog into a map, overriding with any
- values from forcetrust -}
trustMap :: Annex (M.Map UUID TrustLevel)
trustMap = do
logfile <- trustLog
overrides <- Annex.getState Annex.forcetrust
s <- liftIO $ catch (readFile logfile) ignoreerror
return $ M.fromList $ trustMapParse s ++ overrides
where
ignoreerror _ = return ""
{- Trust map parser. -}
trustMapParse :: String -> [(UUID, TrustLevel)]
trustMapParse s = map pair $ filter (not . null) $ lines s
where
pair l
| length w > 1 = (w !! 0, read (w !! 1) :: TrustLevel)
-- for back-compat; the trust log used to only
-- list trusted uuids
| otherwise = (w !! 0, Trusted)
where
w = words l
{- Changes the trust level for a uuid in the trustLog, and commits it. -}
trustSet :: UUID -> TrustLevel -> Annex ()
trustSet uuid level = do
when (null uuid) $
error "unknown UUID; cannot modify trust level"
m <- trustMap
when (M.lookup uuid m /= Just level) $ do
let m' = M.insert uuid level m
logfile <- trustLog
liftIO $ safeWriteFile logfile (serialize m')
g <- Annex.gitRepo
liftIO $ Git.run g "add" [File logfile]
liftIO $ Git.run g "commit"
[ Params "-q -m"
, Param "git annex trust change"
, File logfile
]
where
serialize m = unlines $ map showpair $ M.toList m
showpair (u, t) = u ++ " " ++ show t
|
