git-annex/Command/Transferrer.hs
Joey Hess a422a056f2
make getViaTmpFrom no longer update location log
All callers adjusted to update it themselves.

In Command.ReKey, and Command.SetKey, the cleanup action already did,
so it was updating the log twice before.

This fixes a bug when annex.stalldetection is set, as now
Command.Transferrer can skip updating the location log, and let it be
updated by the calling process.
2020-12-11 11:50:13 -04:00

119 lines
4 KiB
Haskell

{- git-annex command
-
- Copyright 2012-2020 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
module Command.Transferrer where
import Command
import qualified Annex
import Annex.Content
import Logs.Location
import Annex.Transfer
import qualified Remote
import Utility.SimpleProtocol (dupIoHandles)
import qualified Database.Keys
import Annex.BranchState
import Types.Messages
import Annex.TransferrerPool
import Types.Transferrer
import qualified Utility.SimpleProtocol as Proto
cmd :: Command
cmd = command "transferrer" SectionPlumbing "transfers content"
paramNothing (withParams seek)
seek :: CmdParams -> CommandSeek
seek = withNothing (commandAction start)
start :: CommandStart
start = do
enableInteractiveBranchAccess
(readh, writeh) <- liftIO dupIoHandles
let outputwriter = sendTransferResponse writeh . TransferOutput
let outputresponsereader = do
l <- hGetLine readh
return $ case Proto.parseMessage l of
Just (TransferSerializedOutputResponse r) -> Just r
Nothing -> Nothing
Annex.setOutput $ SerializedOutput outputwriter outputresponsereader
runRequests readh writeh runner
stop
where
runner (UploadRequest _ key (TransferAssociatedFile file)) remote =
-- This is called by eg, Annex.Transfer.upload,
-- so caller is responsible for doing notification,
-- and for retrying, and updating location log.
upload' (Remote.uuid remote) key file noRetry
(Remote.action . Remote.storeKey remote key file)
noNotification
runner (DownloadRequest _ key (TransferAssociatedFile file)) remote =
-- This is called by eg, Annex.Transfer.download
-- so caller is responsible for doing notification
-- and for retrying, and updating location log.
let go p = getViaTmp (Remote.retrievalSecurityPolicy remote) (RemoteVerify remote) key file $ \t -> do
Remote.verifiedAction (Remote.retrieveKeyFile remote key file (fromRawFilePath t) p)
in download' (Remote.uuid remote) key file noRetry go
noNotification
runner (AssistantUploadRequest _ key (TransferAssociatedFile file)) remote =
notifyTransfer Upload file $
upload' (Remote.uuid remote) key file stdRetry $ \p -> do
tryNonAsync (Remote.storeKey remote key file p) >>= \case
Left e -> do
warning (show e)
return False
Right () -> do
Remote.logStatus remote key InfoPresent
return True
runner (AssistantDownloadRequest _ key (TransferAssociatedFile file)) remote =
notifyTransfer Download file $
download' (Remote.uuid remote) key file stdRetry $ \p ->
logStatusAfter key $ getViaTmp (Remote.retrievalSecurityPolicy remote) (RemoteVerify remote) key file $ \t -> do
r <- tryNonAsync (Remote.retrieveKeyFile remote key file (fromRawFilePath t) p) >>= \case
Left e -> do
warning (show e)
return (False, UnVerified)
Right v -> return (True, v)
-- Make sure we get the current
-- associated files data for the key,
-- not old cached data.
Database.Keys.closeDb
return r
runRequests
:: Handle
-> Handle
-> (TransferRequest -> Remote -> Annex Bool)
-> Annex ()
runRequests readh writeh a = go Nothing Nothing
where
go lastremoteoruuid lastremote = unlessM (liftIO $ hIsEOF readh) $ do
l <- liftIO $ hGetLine readh
case Proto.parseMessage l of
Just tr -> do
let remoteoruuid = transferRequestRemote tr
-- Often the same remote will be used
-- repeatedly, so cache the last one to
-- avoid looking up repeatedly.
mremote <- if lastremoteoruuid == Just remoteoruuid
then pure lastremote
else case remoteoruuid of
TransferRemoteName n ->
eitherToMaybe <$> Remote.byName' n
TransferRemoteUUID u ->
Remote.byUUID u
case mremote of
Just remote -> do
sendresult =<< a tr remote
go (Just remoteoruuid) mremote
Nothing -> transferrerProtocolError l
Nothing -> transferrerProtocolError l
sendresult = liftIO . sendTransferResponse writeh . TransferResult
sendTransferResponse :: Handle -> TransferResponse -> IO ()
sendTransferResponse h r = do
hPutStrLn h $ unwords $ Proto.formatMessage r
hFlush h