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|
{- git-annex assistant unused files
-
- Copyright 2014 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE OverloadedStrings #-}
module Assistant.Unused where
import qualified Data.Map as M
import Assistant.Common
import qualified Git
import Types.Key
import Logs.Unused
import Logs.Location
import Annex.Content
import Utility.DataUnits
import Utility.DiskFree
import Utility.HumanTime
import Utility.Tense
import Data.Time.Clock.POSIX
import qualified Data.Text as T
describeUnused :: Assistant (Maybe TenseText)
describeUnused = describeUnused' False
describeUnusedWhenBig :: Assistant (Maybe TenseText)
describeUnusedWhenBig = describeUnused' True
{- This uses heuristics: 1000 unused keys, or more unused keys
- than the remaining free disk space, or more than 1/10th the total
- disk space being unused keys all suggest a problem. -}
describeUnused' :: Bool -> Assistant (Maybe TenseText)
describeUnused' whenbig = liftAnnex $ go =<< readUnusedLog ""
where
go m = do
let num = M.size m
let diskused = foldl' sumkeysize 0 (M.keys m)
df <- forpath getDiskFree
disksize <- forpath getDiskSize
return $ if num == 0
then Nothing
else if not whenbig || moreused df diskused || tenthused disksize diskused
then Just $ tenseWords
[ UnTensed $ T.pack $ roughSize storageUnits False diskused
, Tensed "are" "were"
, "taken up by unused files"
]
else if num > 1000
then Just $ tenseWords
[ UnTensed $ T.pack $ show num ++ " unused files"
, Tensed "exist" "existed"
]
else Nothing
moreused Nothing _ = False
moreused (Just df) used = df <= used
tenthused Nothing _ = False
tenthused (Just disksize) used = used >= disksize `div` 10
sumkeysize s k = s + fromMaybe 0 (keySize k)
forpath a = inRepo $ liftIO . a . Git.repoPath
{- With a duration, expires all unused files that are older.
- With Nothing, expires *all* unused files. -}
expireUnused :: Maybe Duration -> Assistant ()
expireUnused duration = do
m <- liftAnnex $ readUnusedLog ""
now <- liftIO getPOSIXTime
let oldkeys = M.keys $ M.filter (tooold now) m
forM_ oldkeys $ \k -> do
debug ["removing old unused key", key2file k]
liftAnnex $ do
removeAnnex k
logStatus k InfoMissing
where
boundry = durationToPOSIXTime <$> duration
tooold now (_, mt) = case boundry of
Nothing -> True
Just b -> maybe False (\t -> now - t >= b) mt
|
