git-annex/Command/TransferKey.hs
Joey Hess 4c47568876
refactoring
This is groundwork for using git-annex transferkeys to run transfers,
in order to allow stalled transfers to be interrupted and retried.

The new upload and download are closer to what git-annex transferkeys
does, so the plan is to make them use it.

Then things that were left using upload' and download' won't recover
from stalls. Notably, that includes import and export. But
at least get/move/copy will be able to. (Also the assistant hopefully,
but not yet.)

This commit was sponsored by Jake Vosloo on Patreon.
2020-12-07 14:49:17 -04:00

74 lines
2.3 KiB
Haskell

{- git-annex plumbing command (for use by old assistant, and users)
-
- Copyright 2012 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
module Command.TransferKey where
import Command
import Annex.Content
import Logs.Location
import Annex.Transfer
import qualified Remote
import Types.Remote
cmd :: Command
cmd = noCommit $
command "transferkey" SectionPlumbing
"transfers a key from or to a remote"
paramKey (seek <--< optParser)
data TransferKeyOptions = TransferKeyOptions
{ keyOptions :: CmdParams
, fromToOptions :: FromToOptions
, fileOption :: AssociatedFile
}
optParser :: CmdParamsDesc -> Parser TransferKeyOptions
optParser desc = TransferKeyOptions
<$> cmdParams desc
<*> parseFromToOptions
<*> (AssociatedFile <$> optional (strOption
( long "file" <> metavar paramFile
<> help "the associated file"
)))
instance DeferredParseClass TransferKeyOptions where
finishParse v = TransferKeyOptions
<$> pure (keyOptions v)
<*> finishParse (fromToOptions v)
<*> pure (fileOption v)
seek :: TransferKeyOptions -> CommandSeek
seek o = withKeys (commandAction . start o) (keyOptions o)
start :: TransferKeyOptions -> (SeekInput, Key) -> CommandStart
start o (_, key) = startingCustomOutput key $ case fromToOptions o of
ToRemote dest -> toPerform key (fileOption o) =<< getParsed dest
FromRemote src -> fromPerform key (fileOption o) =<< getParsed src
toPerform :: Key -> AssociatedFile -> Remote -> CommandPerform
toPerform key file remote = go Upload file $
upload' (uuid remote) key file stdRetry $ \p -> do
tryNonAsync (Remote.storeKey remote key file p) >>= \case
Right () -> do
Remote.logStatus remote key InfoPresent
return True
Left e -> do
warning (show e)
return False
fromPerform :: Key -> AssociatedFile -> Remote -> CommandPerform
fromPerform key file remote = go Upload file $
download' (uuid remote) key file stdRetry $ \p ->
getViaTmp (retrievalSecurityPolicy remote) (RemoteVerify remote) key file $ \t ->
tryNonAsync (Remote.retrieveKeyFile remote key file (fromRawFilePath t) p) >>= \case
Right v -> return (True, v)
Left e -> do
warning (show e)
return (False, UnVerified)
go :: Direction -> AssociatedFile -> (NotifyWitness -> Annex Bool) -> CommandPerform
go direction file a = notifyTransfer direction file a >>= liftIO . exitBool