79 lines
2.6 KiB
Haskell
79 lines
2.6 KiB
Haskell
{- git-annex assistant git pushing thread
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-
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- Copyright 2012 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Assistant.Threads.Pusher 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.Alert
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import Assistant.DaemonStatus
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import Assistant.Sync
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import Utility.ThreadScheduler
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import qualified Remote
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import qualified Types.Remote as Remote
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import Data.Time.Clock
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thisThread :: ThreadName
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thisThread = "Pusher"
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{- This thread retries pushes that failed before. -}
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pushRetryThread :: NamedThread
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pushRetryThread = NamedThread "PushRetrier" $ runEvery (Seconds halfhour) <~> do
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-- We already waited half an hour, now wait until there are failed
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-- pushes to retry.
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pushmap <- getAssistant failedPushMap
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topush <- liftIO $ getFailedPushesBefore pushmap (fromIntegral halfhour)
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unless (null topush) $ do
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debug ["retrying", show (length topush), "failed pushes"]
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now <- liftIO $ getCurrentTime
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st <- getAssistant threadState
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pushnotifier <- getAssistant pushNotifier
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dstatus <- getAssistant daemonStatusHandle
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void $ liftIO $ alertWhile dstatus (pushRetryAlert topush) $
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pushToRemotes thisThread now st (Just pushnotifier) (Just pushmap) topush
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where
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halfhour = 1800
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{- This thread pushes git commits out to remotes soon after they are made. -}
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pushThread :: NamedThread
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pushThread = NamedThread "Pusher" $ runEvery (Seconds 2) <~> 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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commits <- getCommits <<~ commitChan
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-- Now see if now's a good time to push.
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if shouldPush commits
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then do
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remotes <- filter pushable . syncRemotes <$> daemonStatus
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unless (null remotes) $ do
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now <- liftIO $ getCurrentTime
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st <- getAssistant threadState
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pushmap <- getAssistant failedPushMap
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pushnotifier <- getAssistant pushNotifier
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dstatus <- getAssistant daemonStatusHandle
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void $ liftIO $ alertWhile dstatus (pushAlert remotes) $
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pushToRemotes thisThread now st (Just pushnotifier) (Just pushmap) remotes
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else do
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debug ["delaying push of", show (length commits), "commits"]
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flip refillCommits commits <<~ commitChan
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where
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pushable r
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| Remote.specialRemote r = False
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| Remote.readonly r = False
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| otherwise = True
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{- Decide if now is a good time to push to remotes.
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-
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- Current strategy: Immediately push all commits. The commit machinery
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- already determines batches of changes, so we can't easily determine
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- batches better.
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-}
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shouldPush :: [Commit] -> Bool
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shouldPush commits
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| not (null commits) = True
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| otherwise = False
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