83056e7b53
Every remote that sets localpath also implements an availability that reutrns Unavailable when a local directory is not available. This makes external remotes, and others that get support for availability Unavailable to be used by checkAvailable. (Which is only used by the assistant.) Had to keep localpath though, since other parts of the assistant use it to eg, sync with a remote when a removable drive is plugged in. Sponsored-by: Jack Hill on Patreon
80 lines
2.7 KiB
Haskell
80 lines
2.7 KiB
Haskell
{- git-annex assistant export updating thread
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-
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- Copyright 2017 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Assistant.Threads.Exporter where
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import Assistant.Common
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import Assistant.Commits
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import Assistant.Pushes
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import Assistant.DaemonStatus
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import Annex.Concurrent
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import Annex.CurrentBranch
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import Utility.ThreadScheduler
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import qualified Annex
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import qualified Remote
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import qualified Types.Remote as Remote
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import qualified Command.Sync
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import Control.Concurrent.Async
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import Data.Time.Clock
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import qualified Data.Map as M
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{- This thread retries exports that failed before. -}
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exportRetryThread :: NamedThread
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exportRetryThread = namedThread "ExportRetrier" $ runEvery (Seconds halfhour) <~> do
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-- We already waited half an hour, now wait until there are failed
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-- exports to retry.
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toexport <- getFailedPushesBefore (fromIntegral halfhour)
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=<< getAssistant failedExportMap
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unless (null toexport) $ do
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debug ["retrying", show (length toexport), "failed exports"]
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void $ exportToRemotes toexport
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where
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halfhour = 1800
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{- This thread updates exports soon after git commits are made. -}
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exportThread :: NamedThread
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exportThread = namedThread "Exporter" $ runEvery (Seconds 30) <~> do
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-- We already waited two seconds as a simple rate limiter.
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-- Next, wait until at least one commit has been made
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void getExportCommits
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-- Now see if now's a good time to push.
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void $ exportToRemotes =<< exportTargets
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{- We want to avoid exporting to remotes that are marked readonly.
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-
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- Also, avoid exporting to local remotes we can easily tell are not available,
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- to avoid ugly messages when a removable drive is not attached.
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-}
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exportTargets :: Assistant [Remote]
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exportTargets = liftAnnex . filterM (Remote.checkAvailable True)
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=<< candidates <$> getDaemonStatus
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where
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candidates = filter (not . Remote.readonly) . exportRemotes
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exportToRemotes :: [Remote] -> Assistant ()
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exportToRemotes rs = do
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-- This is a long-duration action which runs in the Annex monad,
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-- so don't just liftAnnex to run it; fork the Annex state.
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runner <- liftAnnex $ forkState $
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forM rs $ \r -> do
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Annex.changeState $ \st -> st { Annex.errcounter = 0 }
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start <- liftIO getCurrentTime
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void $ Command.Sync.seekExportContent Nothing rs
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=<< getCurrentBranch
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-- Look at command error counter to see if the export
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-- didn't work.
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failed <- (> 0) <$> Annex.getState Annex.errcounter
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Annex.changeState $ \st -> st { Annex.errcounter = 0 }
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return $ if failed
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then Just (r, start)
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else Nothing
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failed <- catMaybes
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<$> (liftAnnex =<< liftIO . wait =<< liftIO (async runner))
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unless (null failed) $ do
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v <- getAssistant failedExportMap
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changeFailedPushMap v $ M.union $ M.fromList failed
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