83c66ccaf8
Added knownRemotes to DaemonStatus. This list is not entirely trivial to calculate, and having it here should make it easier to add/remove remotes on the fly later on. It did require plumbing the daemonstatus through to some more threads.
90 lines
2.9 KiB
Haskell
90 lines
2.9 KiB
Haskell
{- git-annex assistant git pushing threads
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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 Common.Annex
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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 Assistant.ThreadedMonad
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import Assistant.Threads.Merger
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import qualified Command.Sync
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import Utility.ThreadScheduler
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import Utility.Parallel
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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 pushes that failed before. -}
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pushRetryThread :: ThreadState -> FailedPushMap -> IO ()
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pushRetryThread st pushmap = 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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topush <- getFailedPushesBefore pushmap (fromIntegral halfhour)
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unless (null topush) $ do
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now <- getCurrentTime
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pushToRemotes now st 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 :: ThreadState -> DaemonStatusHandle -> CommitChan -> FailedPushMap -> IO ()
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pushThread st daemonstatus commitchan pushmap = do
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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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now <- getCurrentTime
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if shouldPush now commits
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then do
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remotes <- runThreadState st $
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knownRemotes <$> getDaemonStatus daemonstatus
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pushToRemotes now st pushmap remotes
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else refillCommits commitchan commits
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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 :: UTCTime -> [Commit] -> Bool
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shouldPush _now commits
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| not (null commits) = True
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| otherwise = False
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{- Updates the local sync branch, then pushes it to all remotes, in
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- parallel.
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-
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- Avoids running possibly long-duration commands in the Annex monad, so
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- as not to block other threads. -}
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pushToRemotes :: UTCTime -> ThreadState -> FailedPushMap -> [Remote] -> IO ()
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pushToRemotes now st pushmap remotes = do
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(g, branch) <- runThreadState st $
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(,) <$> fromRepo id <*> Command.Sync.currentBranch
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go True branch g remotes
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where
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go shouldretry branch g rs = do
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Command.Sync.updateBranch (Command.Sync.syncBranch branch) g
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(succeeded, failed) <- inParallel (push g branch) rs
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changeFailedPushMap pushmap $ \m ->
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M.union (makemap failed) $
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M.difference m (makemap succeeded)
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unless (null failed || not shouldretry) $
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retry branch g failed
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makemap l = M.fromList $ zip l (repeat now)
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push g branch remote =
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ifM (Command.Sync.pushBranch remote branch g)
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( exitSuccess, exitFailure)
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retry branch g rs = do
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runThreadState st $ manualPull branch rs
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go False branch g rs
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