80 lines
2.2 KiB
Haskell
80 lines
2.2 KiB
Haskell
{- git-annex command
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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 Command.DropUnused where
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import qualified Data.Map as M
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import Common.Annex
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import Command
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import qualified Annex
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import qualified Command.Drop
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import qualified Remote
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import qualified Git
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import qualified Option
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import Types.Key
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type UnusedMap = M.Map String Key
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def :: [Command]
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def = [withOptions [Command.Drop.fromOption] $
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command "dropunused" (paramRepeating paramNumber)
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seek "drop unused file content"]
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seek :: [CommandSeek]
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seek = [withUnusedMaps]
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{- Read unused logs once, and pass the maps to each start action. -}
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withUnusedMaps :: CommandSeek
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withUnusedMaps params = do
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unused <- readUnusedLog ""
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unusedbad <- readUnusedLog "bad"
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unusedtmp <- readUnusedLog "tmp"
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return $ map (start (unused, unusedbad, unusedtmp)) params
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start :: (UnusedMap, UnusedMap, UnusedMap) -> FilePath -> CommandStart
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start (unused, unusedbad, unusedtmp) s = search
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[ (unused, perform)
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, (unusedbad, performOther gitAnnexBadLocation)
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, (unusedtmp, performOther gitAnnexTmpLocation)
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]
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where
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search [] = stop
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search ((m, a):rest) =
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case M.lookup s m of
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Nothing -> search rest
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Just key -> do
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showStart "dropunused" s
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next $ a key
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perform :: Key -> CommandPerform
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perform key = maybe droplocal dropremote =<< Remote.byName =<< from
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where
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dropremote r = do
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showAction $ "from " ++ Remote.name r
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ok <- Remote.removeKey r key
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next $ Command.Drop.cleanupRemote key r ok
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droplocal = Command.Drop.performLocal key (Just 0) -- force drop
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from = Annex.getField $ Option.name Command.Drop.fromOption
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performOther :: (Key -> Git.Repo -> FilePath) -> Key -> CommandPerform
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performOther filespec key = do
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f <- fromRepo $ filespec key
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liftIO $ whenM (doesFileExist f) $ removeFile f
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next $ return True
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readUnusedLog :: FilePath -> Annex UnusedMap
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readUnusedLog prefix = do
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f <- fromRepo $ gitAnnexUnusedLog prefix
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e <- liftIO $ doesFileExist f
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if e
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then M.fromList . map parse . lines <$> liftIO (readFile f)
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else return M.empty
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where
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parse line = (num, fromJust $ readKey rest)
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where
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(num, rest) = separate (== ' ') line
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