6869e6023e
The only fully supported thing is to have the main repository on one disk, and .git/annex on another. Only commands that move data in/out of the annex will need to copy it across devices. There is only partial support for putting arbitrary subdirectories of .git/annex on different devices. For one thing, but this can require more copies to be done. For example, when .git/annex/tmp is on one device, and .git/annex/journal on another, every journal write involves a call to mv(1). Also, there are a few places that make hard links between various subdirectories of .git/annex with createLink, that are not handled. In the common case without cross-device, the new moveFile is actually faster than renameFile, avoiding an unncessary stat to check that a file (not a directory) is being moved. Of course if a cross-device move is needed, it is as slow as mv(1) of the data.
85 lines
2.4 KiB
Haskell
85 lines
2.4 KiB
Haskell
{- git-annex command
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-
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- Copyright 2010 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Command.Add where
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import Common.Annex
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import Annex.Exception
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import Command
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import qualified Annex
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import qualified Annex.Queue
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import qualified Backend
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import Logs.Location
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import Annex.Content
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import Utility.Touch
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import Backend
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def :: [Command]
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def = [command "add" paramPaths seek "add files to annex"]
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{- Add acts on both files not checked into git yet, and unlocked files. -}
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seek :: [CommandSeek]
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seek = [withFilesNotInGit start, withFilesUnlocked start]
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{- The add subcommand annexes a file, storing it in a backend, and then
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- moving it into the annex directory and setting up the symlink pointing
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- to its content. -}
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start :: BackendFile -> CommandStart
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start p@(_, file) = notBareRepo $ notAnnexed file $ do
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s <- liftIO $ getSymbolicLinkStatus file
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if isSymbolicLink s || not (isRegularFile s)
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then stop
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else do
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showStart "add" file
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next $ perform p
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perform :: BackendFile -> CommandPerform
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perform (backend, file) = Backend.genKey file backend >>= go
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where
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go Nothing = stop
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go (Just (key, _)) = do
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handle (undo file key) $ moveAnnex key file
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next $ cleanup file key True
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{- On error, put the file back so it doesn't seem to have vanished.
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- This can be called before or after the symlink is in place. -}
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undo :: FilePath -> Key -> IOException -> Annex a
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undo file key e = do
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unlessM (inAnnex key) rethrow -- no cleanup to do
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liftIO $ whenM (doesFileExist file) $ removeFile file
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handle tryharder $ fromAnnex key file
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logStatus key InfoMissing
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rethrow
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where
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rethrow = throw e
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-- fromAnnex could fail if the file ownership is weird
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tryharder :: IOException -> Annex ()
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tryharder _ = do
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src <- fromRepo $ gitAnnexLocation key
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liftIO $ moveFile src file
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cleanup :: FilePath -> Key -> Bool -> CommandCleanup
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cleanup file key hascontent = do
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handle (undo file key) $ do
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link <- calcGitLink file key
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liftIO $ createSymbolicLink link file
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when hascontent $ do
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logStatus key InfoPresent
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-- touch the symlink to have the same mtime as the
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-- file it points to
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liftIO $ do
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mtime <- modificationTime <$> getFileStatus file
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touch file (TimeSpec mtime) False
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force <- Annex.getState Annex.force
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if force
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then Annex.Queue.add "add" [Param "-f", Param "--"] [file]
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else Annex.Queue.add "add" [Param "--"] [file]
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return True
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