git-annex/Command/TransferKey.hs
Joey Hess 0f921307e7 mirror: New command, makes two repositories contain the same set of files.
This is a simple approach for setting up a mirroring repository.

It will work with any type of remotes.

Mirror --from is more expensive than mirror --to in general.
OTOH, mirror --from will get the file from any remote that has it, not only
the named mirror remote. And if the named mirror remote is not the fastest
available remote with a file, that can speed things up.

It would be possible to make the assistant or watch command do a more
dynamic mirroring, that didn't need to scan every time.
2013-08-20 15:46:35 -04:00

59 lines
1.8 KiB
Haskell

{- git-annex command, used internally by old versions of assistant;
- kept around for now so running daemons don't break when upgraded
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.TransferKey where
import Common.Annex
import Command
import Annex.Content
import Logs.Location
import Logs.Transfer
import qualified Remote
import Types.Remote
import GitAnnex.Options
import qualified Option
def :: [Command]
def = [withOptions transferKeyOptions $
noCommit $ command "transferkey" paramKey seek SectionPlumbing
"transfers a key from or to a remote"]
transferKeyOptions :: [Option]
transferKeyOptions = fileOption : fromToOptions
fileOption :: Option
fileOption = Option.field [] "file" paramFile "the associated file"
seek :: [CommandSeek]
seek = [withField toOption Remote.byNameWithUUID $ \to ->
withField fromOption Remote.byNameWithUUID $ \from ->
withField fileOption return $ \file ->
withKeys $ start to from file]
start :: Maybe Remote -> Maybe Remote -> AssociatedFile -> Key -> CommandStart
start to from file key =
case (from, to) of
(Nothing, Just dest) -> next $ toPerform dest key file
(Just src, Nothing) -> next $ fromPerform src key file
_ -> error "specify either --from or --to"
toPerform :: Remote -> Key -> AssociatedFile -> CommandPerform
toPerform remote key file = go $
upload (uuid remote) key file forwardRetry $ \p -> do
ok <- Remote.storeKey remote key file p
when ok $
Remote.logStatus remote key InfoPresent
return ok
fromPerform :: Remote -> Key -> AssociatedFile -> CommandPerform
fromPerform remote key file = go $
download (uuid remote) key file forwardRetry $ \p ->
getViaTmp key $ \t -> Remote.retrieveKeyFile remote key file t p
go :: Annex Bool -> CommandPerform
go a = ifM a ( liftIO exitSuccess, liftIO exitFailure)