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|
{- git-annex command
-
- Copyright 2010-2013 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.Move where
import Common.Annex
import Command
import qualified Command.Drop
import qualified Annex
import Annex.Content
import qualified Remote
import Annex.UUID
import qualified Option
import Logs.Presence
import Logs.Transfer
import GitAnnex.Options
import Types.Key
def :: [Command]
def = [withOptions moveOptions $ command "move" paramPaths seek
SectionCommon "move content of files to/from another repository"]
fromOption :: Option
fromOption = Option.field ['f'] "from" paramRemote "source remote"
toOption :: Option
toOption = Option.field ['t'] "to" paramRemote "destination remote"
moveOptions :: [Option]
moveOptions = [fromOption, toOption] ++ keyOptions
seek :: [CommandSeek]
seek =
[ withField toOption Remote.byNameWithUUID $ \to ->
withField fromOption Remote.byNameWithUUID $ \from ->
withKeyOptions (startKey to from True) $
withFilesInGit $ whenAnnexed $ start to from True
]
start :: Maybe Remote -> Maybe Remote -> Bool -> FilePath -> (Key, Backend) -> CommandStart
start to from move file (key, _) = start' to from move (Just file) key
startKey :: Maybe Remote -> Maybe Remote -> Bool -> Key -> CommandStart
startKey to from move key = start' to from move Nothing key
start' :: Maybe Remote -> Maybe Remote -> Bool -> AssociatedFile -> Key -> CommandStart
start' to from move afile key = do
noAuto
case (from, to) of
(Nothing, Nothing) -> error "specify either --from or --to"
(Nothing, Just dest) -> toStart dest move afile key
(Just src, Nothing) -> fromStart src move afile key
(_ , _) -> error "only one of --from or --to can be specified"
where
noAuto = when move $ whenM (Annex.getState Annex.auto) $ error
"--auto is not supported for move"
showMoveAction :: Bool -> Key -> AssociatedFile -> Annex ()
showMoveAction True _ (Just file) = showStart "move" file
showMoveAction False _ (Just file) = showStart "copy" file
showMoveAction True key Nothing = showStart "move" (key2file key)
showMoveAction False key Nothing = showStart "copy" (key2file key)
{- Moves (or copies) the content of an annexed file to a remote.
-
- If the remote already has the content, it is still removed from
- the current repository.
-
- Note that unlike drop, this does not honor annex.numcopies.
- A file's content can be moved even if there are insufficient copies to
- allow it to be dropped.
-}
toStart :: Remote -> Bool -> AssociatedFile -> Key -> CommandStart
toStart dest move afile key = do
u <- getUUID
ishere <- inAnnex key
if not ishere || u == Remote.uuid dest
then stop -- not here, so nothing to do
else do
showMoveAction move key afile
next $ toPerform dest move key afile
toPerform :: Remote -> Bool -> Key -> AssociatedFile -> CommandPerform
toPerform dest move key afile = moveLock move key $ do
-- Checking the remote is expensive, so not done in the start step.
-- In fast mode, location tracking is assumed to be correct,
-- and an explicit check is not done, when copying. When moving,
-- it has to be done, to avoid inaverdent data loss.
fast <- Annex.getState Annex.fast
let fastcheck = fast && not move && not (Remote.hasKeyCheap dest)
isthere <- if fastcheck
then Right <$> expectedpresent
else Remote.hasKey dest key
case isthere of
Left err -> do
showNote err
stop
Right False -> do
showAction $ "to " ++ Remote.name dest
ok <- upload (Remote.uuid dest) key afile noRetry $
Remote.storeKey dest key afile
if ok
then do
Remote.logStatus dest key InfoPresent
finish
else do
when fastcheck $
warning "This could have failed because --fast is enabled."
stop
Right True -> do
unlessM expectedpresent $
Remote.logStatus dest key InfoPresent
finish
where
finish
| move = do
removeAnnex key
next $ Command.Drop.cleanupLocal key
| otherwise = next $ return True
expectedpresent = do
remotes <- Remote.keyPossibilities key
return $ dest `elem` remotes
{- Moves (or copies) the content of an annexed file from a remote
- to the current repository.
-
- If the current repository already has the content, it is still removed
- from the remote.
-}
fromStart :: Remote -> Bool -> AssociatedFile -> Key -> CommandStart
fromStart src move afile key
| move = go
| otherwise = stopUnless (not <$> inAnnex key) go
where
go = stopUnless (fromOk src key) $ do
showMoveAction move key afile
next $ fromPerform src move key afile
fromOk :: Remote -> Key -> Annex Bool
fromOk src key
| Remote.hasKeyCheap src =
either (const expensive) return =<< Remote.hasKey src key
| otherwise = expensive
where
expensive = do
u <- getUUID
remotes <- Remote.keyPossibilities key
return $ u /= Remote.uuid src && elem src remotes
fromPerform :: Remote -> Bool -> Key -> AssociatedFile -> CommandPerform
fromPerform src move key afile = moveLock move key $
ifM (inAnnex key)
( handle move True
, handle move =<< go
)
where
go = download (Remote.uuid src) key afile noRetry $ \p -> do
showAction $ "from " ++ Remote.name src
getViaTmp key $ \t -> Remote.retrieveKeyFile src key afile t p
handle _ False = stop -- failed
handle False True = next $ return True -- copy complete
handle True True = do -- finish moving
ok <- Remote.removeKey src key
next $ Command.Drop.cleanupRemote key src ok
{- Locks a key in order for it to be moved.
- No lock is needed when a key is being copied. -}
moveLock :: Bool -> Key -> Annex a -> Annex a
moveLock True key a = lockContent key a
moveLock False _ a = a
|
