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|
{- git-annex command
-
- Copyright 2010-2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.Fsck where
import Common.Annex
import Command
import qualified Remote
import qualified Types.Backend
import qualified Types.Key
import qualified Backend
import Annex.Content
import Logs.Location
import Logs.Trust
import Annex.UUID
import Utility.DataUnits
import Utility.FileMode
import Config
def :: [Command]
def = [command "fsck" paramPaths seek "check for problems"]
seek :: [CommandSeek]
seek =
[ withNumCopies $ \n -> whenAnnexed $ start n
, withBarePresentKeys startBare
]
start :: Maybe Int -> FilePath -> (Key, Backend) -> CommandStart
start numcopies file (key, backend) = do
showStart "fsck" file
next $ perform key file backend numcopies
perform :: Key -> FilePath -> Backend -> Maybe Int -> CommandPerform
perform key file backend numcopies = check
-- order matters
[ verifyLocationLog key file
, checkKeySize key
, checkBackend backend key
, checkKeyNumCopies key file numcopies
]
{- To fsck a bare repository, fsck each key in the location log. -}
withBarePresentKeys :: (Key -> CommandStart) -> CommandSeek
withBarePresentKeys a params = isBareRepo >>= go
where
go False = return []
go True = do
unless (null params) $
error "fsck should be run without parameters in a bare repository"
prepStart a loggedKeys
startBare :: Key -> CommandStart
startBare key = case Backend.maybeLookupBackendName (Types.Key.keyBackendName key) of
Nothing -> stop
Just backend -> do
showStart "fsck" (show key)
next $ performBare key backend
{- Note that numcopies cannot be checked in a bare repository, because
- getting the numcopies value requires a working copy with .gitattributes
- files. -}
performBare :: Key -> Backend -> CommandPerform
performBare key backend = check
[ verifyLocationLog key (show key)
, checkKeySize key
, checkBackend backend key
]
check :: [Annex Bool] -> CommandPerform
check = sequence >=> dispatch
where
dispatch vs
| all (== True) vs = next $ return True
| otherwise = stop
{- Checks that the location log reflects the current status of the key,
in this repository only. -}
verifyLocationLog :: Key -> String -> Annex Bool
verifyLocationLog key desc = do
present <- inAnnex key
-- Since we're checking that a key's file is present, throw
-- in a permission fixup here too.
when present $ do
f <- inRepo $ gitAnnexLocation key
liftIO $ do
preventWrite f
preventWrite (parentDir f)
u <- getUUID
uuids <- keyLocations key
case (present, u `elem` uuids) of
(True, False) -> do
fix u InfoPresent
-- There is no data loss, so do not fail.
return True
(False, True) -> do
fix u InfoMissing
warning $
"** Based on the location log, " ++ desc
++ "\n** was expected to be present, " ++
"but its content is missing."
return False
_ -> return True
where
fix u s = do
showNote "fixing location log"
logChange key u s
{- The size of the data for a key is checked against the size encoded in
- the key's metadata, if available. -}
checkKeySize :: Key -> Annex Bool
checkKeySize key = do
file <- inRepo $ gitAnnexLocation key
present <- liftIO $ doesFileExist file
case (present, Types.Key.keySize key) of
(_, Nothing) -> return True
(False, _) -> return True
(True, Just size) -> do
stat <- liftIO $ getFileStatus file
let size' = fromIntegral (fileSize stat)
if size == size'
then return True
else do
dest <- moveBad key
warning $ "Bad file size (" ++
compareSizes storageUnits True size size' ++
"); moved to " ++ dest
return False
checkBackend :: Backend -> Key -> Annex Bool
checkBackend = Types.Backend.fsckKey
checkKeyNumCopies :: Key -> FilePath -> Maybe Int -> Annex Bool
checkKeyNumCopies key file numcopies = do
needed <- getNumCopies numcopies
(untrustedlocations, safelocations) <- trustPartition UnTrusted =<< keyLocations key
let present = length safelocations
if present < needed
then do
ppuuids <- Remote.prettyPrintUUIDs "untrusted" untrustedlocations
warning $ missingNote file present needed ppuuids
return False
else return True
missingNote :: String -> Int -> Int -> String -> String
missingNote file 0 _ [] =
"** No known copies exist of " ++ file
missingNote file 0 _ untrusted =
"Only these untrusted locations may have copies of " ++ file ++
"\n" ++ untrusted ++
"Back it up to trusted locations with git-annex copy."
missingNote file present needed [] =
"Only " ++ show present ++ " of " ++ show needed ++
" trustworthy copies exist of " ++ file ++
"\nBack it up with git-annex copy."
missingNote file present needed untrusted =
missingNote file present needed [] ++
"\nThe following untrusted locations may also have copies: " ++
"\n" ++ untrusted
|
