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|
{- git-annex command
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.DropUnused where
import qualified Data.Map as M
import Common.Annex
import Command
import qualified Annex
import qualified Command.Drop
import qualified Command.Move
import qualified Remote
import qualified Git
import Types.Key
type UnusedMap = M.Map String Key
command :: [Command]
command = [repoCommand "dropunused" (paramRepeating paramNumber) seek
"drop unused file content"]
seek :: [CommandSeek]
seek = [withUnusedMaps]
{- Read unused logs once, and pass the maps to each start action. -}
withUnusedMaps :: CommandSeek
withUnusedMaps params = do
unused <- readUnusedLog ""
unusedbad <- readUnusedLog "bad"
unusedtmp <- readUnusedLog "tmp"
return $ map (start (unused, unusedbad, unusedtmp)) params
start :: (UnusedMap, UnusedMap, UnusedMap) -> FilePath -> CommandStart
start (unused, unusedbad, unusedtmp) s = notBareRepo $ search
[ (unused, perform)
, (unusedbad, performOther gitAnnexBadLocation)
, (unusedtmp, performOther gitAnnexTmpLocation)
]
where
search [] = stop
search ((m, a):rest) =
case M.lookup s m of
Nothing -> search rest
Just key -> do
showStart "dropunused" s
next $ a key
perform :: Key -> CommandPerform
perform key = maybe droplocal dropremote =<< Annex.getState Annex.fromremote
where
dropremote name = do
r <- Remote.byName name
showAction $ "from " ++ Remote.name r
next $ Command.Move.fromCleanup r True key
droplocal = Command.Drop.perform key (Just 0) -- force drop
performOther :: (Git.Repo -> Key -> FilePath) -> Key -> CommandPerform
performOther filespec key = do
g <- gitRepo
let f = filespec g key
liftIO $ whenM (doesFileExist f) $ removeFile f
next $ return True
readUnusedLog :: FilePath -> Annex UnusedMap
readUnusedLog prefix = do
g <- gitRepo
let f = gitAnnexUnusedLog prefix g
e <- liftIO $ doesFileExist f
if e
then return . M.fromList . map parse . lines
=<< liftIO (readFile f)
else return M.empty
where
parse line = (head ws, fromJust $ readKey $ unwords $ tail ws)
where
ws = words line
|
