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|
{- git-annex command
-
- Copyright 2010,2012 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 Remote
import qualified Git
import qualified Option
import Types.Key
type UnusedMap = M.Map Integer Key
def :: [Command]
def = [withOptions [Command.Drop.fromOption] $
command "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)) $
concatMap unusedSpec params
unusedSpec :: String -> [Integer]
unusedSpec spec
| "-" `isInfixOf` spec = range $ separate (== '-') spec
| otherwise = catMaybes [readish spec]
where
range (a, b) = case (readish a, readish b) of
(Just x, Just y) -> [x..y]
_ -> []
start :: (UnusedMap, UnusedMap, UnusedMap) -> Integer -> CommandStart
start (unused, unusedbad, unusedtmp) n = search
[ (unused, perform)
, (unusedbad, performOther gitAnnexBadLocation)
, (unusedtmp, performOther gitAnnexTmpLocation)
]
where
search [] = stop
search ((m, a):rest) =
case M.lookup n m of
Nothing -> search rest
Just key -> do
showStart "dropunused" (show n)
next $ a key
perform :: Key -> CommandPerform
perform key = maybe droplocal dropremote =<< Remote.byName =<< from
where
dropremote r = do
showAction $ "from " ++ Remote.name r
ok <- Remote.removeKey r key
next $ Command.Drop.cleanupRemote key r ok
droplocal = Command.Drop.performLocal key (Just 0) -- force drop
from = Annex.getField $ Option.name Command.Drop.fromOption
performOther :: (Key -> Git.Repo -> FilePath) -> Key -> CommandPerform
performOther filespec key = do
f <- fromRepo $ filespec key
liftIO $ whenM (doesFileExist f) $ removeFile f
next $ return True
readUnusedLog :: FilePath -> Annex UnusedMap
readUnusedLog prefix = do
f <- fromRepo $ gitAnnexUnusedLog prefix
ifM (liftIO $ doesFileExist f)
( M.fromList . catMaybes . map parse . lines
<$> liftIO (readFile f)
, return M.empty
)
where
parse line =
case (readish tag, readKey rest) of
(Just num, Just key) -> Just (num, key)
_ -> Nothing
where
(tag, rest) = separate (== ' ') line
|
