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|
{- git-annex command
-
- Copyright 2010-2015 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Command.Fix where
import Command
import Config
import qualified Annex
import Annex.Version
import Annex.ReplaceFile
import Annex.Content
import Annex.Perms
import qualified Annex.Queue
import qualified Database.Keys
#if ! defined(mingw32_HOST_OS) && ! defined(__ANDROID__)
import Utility.Touch
#endif
cmd :: Command
cmd = notDirect $ noCommit $ withGlobalOptions [annexedMatchingOptions] $
command "fix" SectionMaintenance
"fix up links to annexed content"
paramPaths (withParams seek)
seek :: CmdParams -> CommandSeek
seek ps = unlessM crippledFileSystem $ do
fixwhat <- ifM versionSupportsUnlockedPointers
( return FixAll
, return FixSymlinks
)
l <- workTreeItems ps
flip withFilesInGit l $ whenAnnexed $ start fixwhat
data FixWhat = FixSymlinks | FixAll
start :: FixWhat -> FilePath -> Key -> CommandStart
start fixwhat file key = do
currlink <- liftIO $ catchMaybeIO $ readSymbolicLink file
wantlink <- calcRepo $ gitAnnexLink file key
case currlink of
Just l
| l /= wantlink -> fixby $ fixSymlink file wantlink
| otherwise -> stop
Nothing -> case fixwhat of
FixAll -> fixthin
FixSymlinks -> stop
where
fixby a = do
showStart "fix" file
next a
fixthin = do
obj <- calcRepo $ gitAnnexLocation key
stopUnless (isUnmodified key file <&&> isUnmodified key obj) $ do
thin <- annexThin <$> Annex.getGitConfig
fs <- liftIO $ catchMaybeIO $ getFileStatus file
os <- liftIO $ catchMaybeIO $ getFileStatus obj
case (linkCount <$> fs, linkCount <$> os, thin) of
(Just 1, Just 1, True) ->
fixby $ makeHardLink file key
(Just n, Just n', False) | n > 1 && n == n' ->
fixby $ breakHardLink file key obj
_ -> stop
breakHardLink :: FilePath -> Key -> FilePath -> CommandPerform
breakHardLink file key obj = do
replaceFile file $ \tmp -> do
mode <- liftIO $ catchMaybeIO $ fileMode <$> getFileStatus file
unlessM (checkedCopyFile key obj tmp mode) $
error "unable to break hard link"
thawContent tmp
modifyContent obj $ freezeContent obj
Database.Keys.storeInodeCaches key [file]
next $ return True
makeHardLink :: FilePath -> Key -> CommandPerform
makeHardLink file key = do
replaceFile file $ \tmp -> do
mode <- liftIO $ catchMaybeIO $ fileMode <$> getFileStatus file
linkFromAnnex key tmp mode >>= \case
LinkAnnexFailed -> error "unable to make hard link"
_ -> noop
next $ return True
fixSymlink :: FilePath -> FilePath -> CommandPerform
fixSymlink file link = do
liftIO $ do
#if ! defined(mingw32_HOST_OS) && ! defined(__ANDROID__)
-- preserve mtime of symlink
mtime <- catchMaybeIO $ TimeSpec . modificationTime
<$> getSymbolicLinkStatus file
#endif
createDirectoryIfMissing True (parentDir file)
removeFile file
createSymbolicLink link file
#if ! defined(mingw32_HOST_OS) && ! defined(__ANDROID__)
maybe noop (\t -> touch file t False) mtime
#endif
next $ cleanupSymlink file
cleanupSymlink :: FilePath -> CommandCleanup
cleanupSymlink file = do
Annex.Queue.addCommand "add" [Param "--force", Param "--"] [file]
return True
|
