54ad1b4cfb
Works around this bug in unix-compat: https://github.com/jacobstanley/unix-compat/issues/56 getFileStatus and other FilePath using functions in unix-compat do not do UNC conversion on Windows. Made Utility.RawFilePath use convertToWindowsNativeNamespace to do the necessary conversion on windows to support long filenames. Audited all imports of System.PosixCompat.Files to make sure that no functions that operate on FilePath were imported from it. Instead, use the equvilants from Utility.RawFilePath. In particular the re-export of that module in Common had to be removed, which led to lots of other changes throughout the code. The changes to Build.Configure, Build.DesktopFile, and Build.TestConfig make Utility.Directory not be needed to build setup. And so let it use Utility.RawFilePath, which depends on unix, which cannot be in setup-depends. Sponsored-by: Dartmouth College's Datalad project
104 lines
3 KiB
Haskell
104 lines
3 KiB
Haskell
{- git-annex command
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-
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- Copyright 2010,2015 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.Lock 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.Link
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import Annex.InodeSentinal
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import Annex.Perms
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import Annex.ReplaceFile
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import Utility.InodeCache
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import qualified Database.Keys
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import Annex.Ingest
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import Logs.Location
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import Git.FilePath
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import qualified Utility.RawFilePath as R
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import System.PosixCompat.Files (linkCount)
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cmd :: Command
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cmd = withAnnexOptions [jsonOptions, annexedMatchingOptions] $
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command "lock" SectionCommon
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"undo unlock command"
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paramPaths (withParams seek)
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seek :: CmdParams -> CommandSeek
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seek ps = withFilesInGitAnnex ww seeker =<< workTreeItems ww ps
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where
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ww = WarnUnmatchLsFiles
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seeker = AnnexedFileSeeker
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{ startAction = start
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, checkContentPresent = Nothing
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, usesLocationLog = False
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}
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start :: SeekInput -> RawFilePath -> Key -> CommandStart
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start si file key = ifM (isJust <$> isAnnexLink file)
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( stop
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, starting "lock" (mkActionItem (key, file)) si $
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go =<< liftIO (isPointerFile file)
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)
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where
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go (Just key')
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| key' == key = cont
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| otherwise = errorModified
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go Nothing =
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ifM (isUnmodified key file)
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( cont
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, ifM (Annex.getRead Annex.force)
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( cont
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, errorModified
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)
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)
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cont = perform file key
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perform :: RawFilePath -> Key -> CommandPerform
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perform file key = do
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lockdown =<< calcRepo (gitAnnexLocation key)
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addSymlink file key =<< withTSDelta (liftIO . genInodeCache file)
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next $ return True
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where
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lockdown obj = do
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ifM (isUnmodified key obj)
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( breakhardlink obj
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, repopulate obj
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)
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whenM (liftIO $ R.doesPathExist obj) $
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freezeContent obj
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-- It's ok if the file is hard linked to obj, but if some other
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-- associated file is, we need to break that link to lock down obj.
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breakhardlink obj = whenM (catchBoolIO $ (> 1) . linkCount <$> liftIO (R.getFileStatus obj)) $ do
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mfc <- withTSDelta (liftIO . genInodeCache file)
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unlessM (sameInodeCache obj (maybeToList mfc)) $ do
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modifyContentDir obj $ replaceGitAnnexDirFile (fromRawFilePath obj) $ \tmp -> do
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unlessM (checkedCopyFile key obj (toRawFilePath tmp) Nothing) $
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giveup "unable to lock file"
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Database.Keys.storeInodeCaches key [obj]
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-- Try to repopulate obj from an unmodified associated file.
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repopulate obj = modifyContentDir obj $ do
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g <- Annex.gitRepo
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fs <- map (`fromTopFilePath` g)
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<$> Database.Keys.getAssociatedFiles key
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mfile <- firstM (isUnmodified key) fs
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liftIO $ removeWhenExistsWith R.removeLink obj
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case mfile of
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Just unmodified ->
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ifM (checkedCopyFile key unmodified obj Nothing)
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( Database.Keys.storeInodeCaches key [obj]
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, lostcontent
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)
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Nothing -> lostcontent
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lostcontent = logStatus key InfoMissing
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errorModified :: a
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errorModified = giveup "Locking this file would discard any changes you have made to it. Use 'git annex add' to stage your changes. (Or, use --force to override)"
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