5f391179f1Only done on those calls to getFileStatus that had a RawFilePath, not a FilePath. The others would probably be just as fast if converted to use it with toRawFilePath, but I'm not 100% sure. Note that genInodeCache' uses fromRawFilePath, but that value only gets used on Windows, so on unix the thunk will never be evaluated.
130 lines
4.2 KiB
Haskell
130 lines
4.2 KiB
Haskell
{- git-annex command
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-
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- Copyright 2012-2016 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Command.ReKey where
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import Command
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import qualified Annex
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import Annex.Content
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import Annex.Ingest
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import Annex.Link
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import Annex.Perms
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import Annex.ReplaceFile
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import Logs.Location
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import Git.FilePath
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import qualified Database.Keys
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import Annex.InodeSentinal
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import Utility.InodeCache
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import qualified Utility.RawFilePath as R
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cmd :: Command
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cmd = command "rekey" SectionPlumbing
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"change keys used for files"
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(paramRepeating $ paramPair paramPath paramKey)
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(seek <$$> optParser)
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data ReKeyOptions = ReKeyOptions
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{ reKeyThese :: CmdParams
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, batchOption :: BatchMode
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}
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optParser :: CmdParamsDesc -> Parser ReKeyOptions
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optParser desc = ReKeyOptions
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<$> cmdParams desc
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<*> parseBatchOption
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-- Split on the last space, since a FilePath can contain whitespace,
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-- but a Key very rarely does.
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batchParser :: String -> Either String (RawFilePath, Key)
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batchParser s = case separate (== ' ') (reverse s) of
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(rk, rf)
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| null rk || null rf -> Left "Expected: \"file key\""
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| otherwise -> case deserializeKey (reverse rk) of
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Nothing -> Left "bad key"
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Just k -> Right (toRawFilePath (reverse rf), k)
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seek :: ReKeyOptions -> CommandSeek
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seek o = case batchOption o of
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Batch fmt -> batchInput fmt batchParser (batchCommandAction . start)
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NoBatch -> withPairs (commandAction . start . parsekey) (reKeyThese o)
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where
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parsekey (file, skey) =
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(toRawFilePath file, fromMaybe (giveup "bad key") (deserializeKey skey))
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start :: (RawFilePath, Key) -> CommandStart
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start (file, newkey) = ifAnnexed file go stop
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where
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go oldkey
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| oldkey == newkey = stop
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| otherwise = starting "rekey" (ActionItemWorkTreeFile file) $
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perform file oldkey newkey
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perform :: RawFilePath -> Key -> Key -> CommandPerform
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perform file oldkey newkey = do
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ifM (inAnnex oldkey)
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( unlessM (linkKey file oldkey newkey) $
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giveup "failed creating link from old to new key"
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, unlessM (Annex.getState Annex.force) $
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giveup $ fromRawFilePath file ++ " is not available (use --force to override)"
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)
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next $ cleanup file oldkey newkey
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{- Make a hard link to the old key content (when supported),
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- to avoid wasting disk space. -}
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linkKey :: RawFilePath -> Key -> Key -> Annex Bool
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linkKey file oldkey newkey = ifM (isJust <$> isAnnexLink file)
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{- If the object file is already hardlinked to elsewhere, a hard
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- link won't be made by getViaTmpFromDisk, but a copy instead.
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- This avoids hard linking to content linked to an
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- unlocked file, which would leave the new key unlocked
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- and vulnerable to corruption. -}
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( getViaTmpFromDisk RetrievalAllKeysSecure DefaultVerify newkey $ \tmp -> unVerified $ do
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oldobj <- calcRepo (gitAnnexLocation oldkey)
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isJust <$> linkOrCopy' (return True) newkey oldobj tmp Nothing
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, do
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{- The file being rekeyed is itself an unlocked file; if
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- it's hard linked to the old key, that link must be broken. -}
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oldobj <- calcRepo (gitAnnexLocation oldkey)
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v <- tryNonAsync $ do
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st <- liftIO $ R.getFileStatus file
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when (linkCount st > 1) $ do
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freezeContent oldobj
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replaceFile (fromRawFilePath file) $ \tmp -> do
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unlessM (checkedCopyFile oldkey oldobj tmp Nothing) $
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error "can't lock old key"
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thawContent tmp
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ic <- withTSDelta (liftIO . genInodeCache' file)
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case v of
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Left e -> do
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warning (show e)
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return False
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Right () -> do
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r <- linkToAnnex newkey (fromRawFilePath file) ic
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return $ case r of
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LinkAnnexFailed -> False
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LinkAnnexOk -> True
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LinkAnnexNoop -> True
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)
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cleanup :: RawFilePath -> Key -> Key -> CommandCleanup
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cleanup file oldkey newkey = do
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ifM (isJust <$> isAnnexLink file)
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( do
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-- Update symlink to use the new key.
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liftIO $ removeFile (fromRawFilePath file)
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addLink (fromRawFilePath file) newkey Nothing
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, do
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mode <- liftIO $ catchMaybeIO $ fileMode <$> R.getFileStatus file
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liftIO $ whenM (isJust <$> isPointerFile file) $
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writePointerFile file newkey mode
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stagePointerFile file mode =<< hashPointerFile newkey
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Database.Keys.removeAssociatedFile oldkey
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=<< inRepo (toTopFilePath (fromRawFilePath file))
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)
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whenM (inAnnex newkey) $
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logStatus newkey InfoPresent
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return True
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