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{- git-annex location log
-
- git-annex keeps track of which repositories have the contents of annexed
- files.
-
- Repositories record their UUID and the date when they --get or --drop
- a value.
-
- Copyright 2010-2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module LocationLog (
LogStatus(..),
logChange,
readLog,
writeLog,
keyLocations,
loggedKeys
) where
import System.FilePath
import Control.Monad (when)
import Data.Maybe
import qualified Git
import qualified Branch
import UUID
import Types
import Locations
import PresenceLog
{- Log a change in the presence of a key's value in a repository. -}
logChange :: Git.Repo -> Key -> UUID -> LogStatus -> Annex ()
logChange repo key u s = do
when (null u) $
error $ "unknown UUID for " ++ Git.repoDescribe repo ++
" (have you run git annex init there?)"
line <- logNow s u
let f = logFile key
ls <- readLog f
writeLog f (compactLog $ line:ls)
{- Returns a list of repository UUIDs that, according to the log, have
- the value of a key. -}
keyLocations :: Key -> Annex [UUID]
keyLocations key = currentLog $ logFile key
{- Finds all keys that have location log information.
- (There may be duplicate keys in the list.) -}
loggedKeys :: Annex [Key]
loggedKeys =
return . catMaybes . map (logFileKey . takeFileName) =<< Branch.files
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