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