428c91606b
Before only unlocked files were included. The initial scan now scans for locked as well as unlocked files. This does mean it gets a little bit slower, although I optimised it as well as I think it can be. reconcileStaged changed to diff from the current index to the tree of the previous index. This lets it handle deletions as well, removing associated files for both locked and unlocked files, which did not always happen before. On upgrade, there will be no recorded previous tree, so it will diff from the empty tree to current index, and so will fully populate the associated files, as well as removing any stale associated files that were present due to them not being removed before. reconcileStaged now does a bit more work. Most of the time, this will just be due to running more often, after some change is made to the index, and since there will be few changes since the last time, it will not be a noticable overhead. What may turn out to be a noticable slowdown is after changing to a branch, it has to go through the diff from the previous index to the new one, and if there are lots of changes, that could take a long time. Also, after adding a lot of files, or deleting a lot of files, or moving a large subdirectory, etc. Command.Lock used removeAssociatedFile, but now that's wrong because a newly locked file still needs to have its associated file tracked. Command.Rekey used removeAssociatedFile when the file was unlocked. It could remove it also when it's locked, but it is not really necessary, because it changes the index, and so the next time git-annex run and accesses the keys db, reconcileStaged will run and update it. There are probably several other places that use addAssociatedFile and don't need to any more for similar reasons. But there's no harm in keeping them, and it probably is a good idea to, if only to support mixing this with older versions of git-annex. However, mixing this and older versions does risk reconcileStaged not running, if the older version already ran it on a given index state. So it's not a good idea to mix versions. This problem could be dealt with by changing the name of the gitAnnexKeysDbIndexCache, but that would leave the old file dangling, or it would need to keep trying to remove it.
101 lines
2.9 KiB
Haskell
101 lines
2.9 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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cmd :: Command
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cmd = withGlobalOptions [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.getState 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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addLink (CheckGitIgnore False) file key
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=<< 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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modifyContent 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 = modifyContent 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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unlessM (checkedCopyFile key unmodified obj Nothing)
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lostcontent
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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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