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|
{- git-annex command
-
- Copyright 2010-2011 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
def :: [Command]
def = [withOptions options $ command "move" paramPaths seek
"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"
options :: [Option]
options = [fromOption, toOption]
seek :: [CommandSeek]
seek = [withField toOption Remote.byName $ \to ->
withField fromOption Remote.byName $ \from ->
withFilesInGit $ whenAnnexed $ start to from True]
start :: Maybe Remote -> Maybe Remote -> Bool -> FilePath -> (Key, Backend) -> CommandStart
start to from move file (key, _) = do
noAuto
case (from, to) of
(Nothing, Nothing) -> error "specify either --from or --to"
(Nothing, Just dest) -> toStart dest move file key
(Just src, Nothing) -> fromStart src move file 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 -> FilePath -> Annex ()
showMoveAction True file = showStart "move" file
showMoveAction False file = showStart "copy" file
{- 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 -> FilePath -> Key -> CommandStart
toStart dest move file 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 file
next $ toPerform dest move key file
toPerform :: Remote -> Bool -> Key -> FilePath -> CommandPerform
toPerform dest move key file = 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 do
remotes <- Remote.keyPossibilities key
return $ Right $ dest `elem` remotes
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 (Just file) noRetry $
Remote.storeKey dest key (Just file)
if ok
then finish True
else do
when fastcheck $
warning "This could have failed because --fast is enabled."
stop
Right True -> finish False
where
finish remotechanged = do
when remotechanged $
Remote.logStatus dest key InfoPresent
if move
then do
whenM (inAnnex key) $ removeAnnex key
next $ Command.Drop.cleanupLocal key
else next $ return True
{- 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 -> FilePath -> Key -> CommandStart
fromStart src move file key
| move = go
| otherwise = stopUnless (not <$> inAnnex key) go
where
go = stopUnless (fromOk src key) $ do
showMoveAction move file
next $ fromPerform src move key file
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 -> FilePath -> CommandPerform
fromPerform src move key file = moveLock move key $
ifM (inAnnex key)
( handle move True
, handle move =<< go
)
where
go = download (Remote.uuid src) key (Just file) noRetry $ do
showAction $ "from " ++ Remote.name src
getViaTmp key $ Remote.retrieveKeyFile src key (Just file)
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
|
