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|
{- git-annex unused log file
-
- Copyright 2010,2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Logs.Unused (
UnusedMap,
UnusedMaps(..),
writeUnusedLog,
readUnusedLog,
withUnusedMaps,
startUnused,
) where
import qualified Data.Map as M
import Common.Annex
import Command
import Types.Key
import Utility.Tmp
writeUnusedLog :: FilePath -> [(Int, Key)] -> Annex ()
writeUnusedLog prefix l = do
logfile <- fromRepo $ gitAnnexUnusedLog prefix
liftIO $ viaTmp writeFile logfile $
unlines $ map (\(n, k) -> show n ++ " " ++ key2file k) l
readUnusedLog :: FilePath -> Annex UnusedMap
readUnusedLog prefix = do
f <- fromRepo $ gitAnnexUnusedLog prefix
ifM (liftIO $ doesFileExist f)
( M.fromList . mapMaybe parse . lines
<$> liftIO (readFile f)
, return M.empty
)
where
parse line = case (readish tag, file2key rest) of
(Just num, Just key) -> Just (num, key)
_ -> Nothing
where
(tag, rest) = separate (== ' ') line
type UnusedMap = M.Map Int Key
data UnusedMaps = UnusedMaps
{ unusedMap :: UnusedMap
, unusedBadMap :: UnusedMap
, unusedTmpMap :: UnusedMap
}
{- Read unused logs once, and pass the maps to each start action. -}
withUnusedMaps :: (UnusedMaps -> Int -> CommandStart) -> CommandSeek
withUnusedMaps a params = do
unused <- readUnusedLog ""
unusedbad <- readUnusedLog "bad"
unusedtmp <- readUnusedLog "tmp"
return $ map (a $ UnusedMaps unused unusedbad unusedtmp) $
concatMap unusedSpec params
unusedSpec :: String -> [Int]
unusedSpec spec
| "-" `isInfixOf` spec = range $ separate (== '-') spec
| otherwise = maybe badspec (: []) (readish spec)
where
range (a, b) = case (readish a, readish b) of
(Just x, Just y) -> [x..y]
_ -> badspec
badspec = error $ "Expected number or range, not \"" ++ spec ++ "\""
{- Start action for unused content. Finds the number in the maps, and
- calls either of 3 actions, depending on the type of unused file. -}
startUnused :: String
-> (Key -> CommandPerform)
-> (Key -> CommandPerform)
-> (Key -> CommandPerform)
-> UnusedMaps -> Int -> CommandStart
startUnused message unused badunused tmpunused maps n = search
[ (unusedMap maps, unused)
, (unusedBadMap maps, badunused)
, (unusedTmpMap maps, tmpunused)
]
where
search [] = stop
search ((m, a):rest) =
case M.lookup n m of
Nothing -> search rest
Just key -> do
showStart message (show n)
next $ a key
|
