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{- git-annex assistant sanity checker
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-}
module Assistant.SanityChecker (
sanityCheckerThread
) where
import Common.Annex
import qualified Git.LsFiles
import Assistant.DaemonStatus
import Assistant.ThreadedMonad
import Assistant.Changes
import Utility.ThreadScheduler
import qualified Assistant.Watcher
import Data.Time.Clock.POSIX
{- This thread wakes up occasionally to make sure the tree is in good shape. -}
sanityCheckerThread :: ThreadState -> DaemonStatusHandle -> ChangeChan -> IO ()
sanityCheckerThread st status changechan = forever $ do
waitForNextCheck st status
runThreadState st $
modifyDaemonStatus status $ \s -> s
{ sanityCheckRunning = True }
now <- getPOSIXTime -- before check started
catchIO (check st status changechan)
(runThreadState st . warning . show)
runThreadState st $ do
modifyDaemonStatus status $ \s -> s
{ sanityCheckRunning = False
, lastSanityCheck = Just now
}
{- Only run one check per day, from the time of the last check. -}
waitForNextCheck :: ThreadState -> DaemonStatusHandle -> IO ()
waitForNextCheck st status = do
v <- runThreadState st $
lastSanityCheck <$> getDaemonStatus status
now <- getPOSIXTime
threadDelaySeconds $ Seconds $ calcdelay now v
where
calcdelay _ Nothing = oneDay
calcdelay now (Just lastcheck)
| lastcheck < now = max oneDay $
oneDay - truncate (now - lastcheck)
| otherwise = oneDay
oneDay :: Int
oneDay = 24 * 60 * 60
{- It's important to stay out of the Annex monad as much as possible while
- running potentially expensive parts of this check, since remaining in it
- will block the watcher. -}
check :: ThreadState -> DaemonStatusHandle -> ChangeChan -> IO ()
check st status changechan = do
g <- runThreadState st $ do
showSideAction "Running daily check"
fromRepo id
-- Find old unstaged symlinks, and add them to git.
unstaged <- Git.LsFiles.notInRepo False ["."] g
now <- getPOSIXTime
forM_ unstaged $ \file -> do
ms <- catchMaybeIO $ getSymbolicLinkStatus file
case ms of
Just s | toonew (statusChangeTime s) now -> noop
| isSymbolicLink s ->
addsymlink file ms
_ -> noop
where
toonew timestamp now = now < (realToFrac (timestamp + slop) :: POSIXTime)
slop = fromIntegral tenMinutes
insanity m = runThreadState st $ warning m
addsymlink file s = do
insanity $ "found unstaged symlink: " ++ file
Assistant.Watcher.runHandler st status changechan
Assistant.Watcher.onAddSymlink file s
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