69f2d1dd43
remoteAnnexConfig will avoid bugs like
a3a674d15b
Use now more generic remoteConfig in a couple places that built
non-annex config settings manually before.
276 lines
9.2 KiB
Haskell
276 lines
9.2 KiB
Haskell
{- git-annex assistant repo syncing
|
|
-
|
|
- Copyright 2012 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
{-# LANGUAGE OverloadedStrings #-}
|
|
|
|
module Assistant.Sync where
|
|
|
|
import Assistant.Common
|
|
import Assistant.Pushes
|
|
import Assistant.Alert
|
|
import Assistant.Alert.Utility
|
|
import Assistant.DaemonStatus
|
|
import Assistant.ScanRemotes
|
|
import Assistant.RemoteControl
|
|
import qualified Command.Sync
|
|
import Utility.Parallel
|
|
import qualified Git
|
|
import qualified Git.Command
|
|
import qualified Remote
|
|
import qualified Types.Remote as Remote
|
|
import qualified Remote.List as Remote
|
|
import qualified Annex.Branch
|
|
import Annex.UUID
|
|
import Annex.TaggedPush
|
|
import Annex.Ssh
|
|
import Annex.CurrentBranch
|
|
import qualified Config
|
|
import Git.Config
|
|
import Config.DynamicConfig
|
|
import Assistant.NamedThread
|
|
import Assistant.Threads.Watcher (watchThread, WatcherControl(..))
|
|
import Assistant.TransferSlots
|
|
import Assistant.TransferQueue
|
|
import Assistant.RepoProblem
|
|
import Assistant.Commits
|
|
import Types.Transfer
|
|
import Database.Export
|
|
|
|
import Data.Time.Clock
|
|
import qualified Data.Map as M
|
|
import Control.Concurrent
|
|
|
|
{- Syncs with remotes that may have been disconnected for a while.
|
|
-
|
|
- First gets git in sync, and then prepares any necessary file transfers.
|
|
-
|
|
- An expensive full scan is queued when the git-annex branches of some of
|
|
- the remotes have diverged from the local git-annex branch. Otherwise,
|
|
- it's sufficient to requeue failed transfers.
|
|
-
|
|
- Also handles signaling any connectRemoteNotifiers, after the syncing is
|
|
- done, and records an export commit to make any exports be updated.
|
|
-}
|
|
reconnectRemotes :: [Remote] -> Assistant ()
|
|
reconnectRemotes [] = recordExportCommit
|
|
reconnectRemotes rs = void $ do
|
|
rs' <- liftIO $ filterM (Remote.checkAvailable True) rs
|
|
unless (null rs') $ do
|
|
failedrs <- syncAction rs' (const go)
|
|
forM_ failedrs $ \r ->
|
|
whenM (liftIO $ Remote.checkAvailable False r) $
|
|
repoHasProblem (Remote.uuid r) (syncRemote r)
|
|
mapM_ signal $ filter (`notElem` failedrs) rs'
|
|
recordExportCommit
|
|
where
|
|
gitremotes = liftAnnex $
|
|
filterM (notspecialremote <$$> Remote.getRepo) rs
|
|
notspecialremote r
|
|
| Git.repoIsUrl r = True
|
|
| Git.repoIsLocal r = True
|
|
| Git.repoIsLocalUnknown r = True
|
|
| otherwise = False
|
|
sync currentbranch@(Just _, _) = do
|
|
(failedpull, diverged) <- manualPull currentbranch =<< gitremotes
|
|
now <- liftIO getCurrentTime
|
|
failedpush <- pushToRemotes' now =<< gitremotes
|
|
return (nub $ failedpull ++ failedpush, diverged)
|
|
{- No local branch exists yet, but we can try pulling. -}
|
|
sync (Nothing, _) = manualPull (Nothing, Nothing) =<< gitremotes
|
|
go = do
|
|
(failed, diverged) <- sync =<< liftAnnex getCurrentBranch
|
|
addScanRemotes diverged =<<
|
|
filterM (not <$$> liftIO . getDynamicConfig . remoteAnnexIgnore . Remote.gitconfig) rs
|
|
return failed
|
|
signal r = liftIO . mapM_ (flip tryPutMVar ())
|
|
=<< fromMaybe [] . M.lookup (Remote.uuid r) . connectRemoteNotifiers
|
|
<$> getDaemonStatus
|
|
|
|
{- Pushes the local sync branch to all remotes, in
|
|
- parallel, along with the git-annex branch. This is the same
|
|
- as "git annex sync", except in parallel, and will co-exist with use of
|
|
- "git annex sync".
|
|
-
|
|
- Avoids running possibly long-duration commands in the Annex monad, so
|
|
- as not to block other threads.
|
|
-
|
|
- This can fail, when the remote's sync branch (or git-annex branch) has
|
|
- been updated by some other remote pushing into it, or by the remote
|
|
- itself. To handle failure, a manual pull and merge is done, and the push
|
|
- is retried.
|
|
-
|
|
- When there's a lot of activity, we may fail more than once.
|
|
- On the other hand, we may fail because the remote is not available.
|
|
- Rather than retrying indefinitely, after the first retry we enter a
|
|
- fallback mode, where our push is guarenteed to succeed if the remote is
|
|
- reachable. If the fallback fails, the push is queued to be retried
|
|
- later.
|
|
-
|
|
- Returns any remotes that it failed to push to.
|
|
-}
|
|
pushToRemotes :: [Remote] -> Assistant [Remote]
|
|
pushToRemotes remotes = do
|
|
now <- liftIO getCurrentTime
|
|
let remotes' = filter (wantpush . Remote.gitconfig) remotes
|
|
syncAction remotes' (pushToRemotes' now)
|
|
where
|
|
wantpush gc
|
|
| remoteAnnexReadOnly gc = False
|
|
| not (remoteAnnexPush gc) = False
|
|
| otherwise = True
|
|
|
|
pushToRemotes' :: UTCTime -> [Remote] -> Assistant [Remote]
|
|
pushToRemotes' now remotes = do
|
|
(g, branch, u) <- liftAnnex $ do
|
|
Annex.Branch.commit =<< Annex.Branch.commitMessage
|
|
(,,)
|
|
<$> gitRepo
|
|
<*> getCurrentBranch
|
|
<*> getUUID
|
|
ret <- go True branch g u remotes
|
|
return ret
|
|
where
|
|
go _ (Nothing, _) _ _ _ = return [] -- no branch, so nothing to do
|
|
go _ _ _ _ [] = return [] -- no remotes, so nothing to do
|
|
go shouldretry currbranch@(Just branch, _) g u rs = do
|
|
debug ["pushing to", show rs]
|
|
(succeeded, failed) <- parallelPush g rs (push branch)
|
|
updatemap succeeded []
|
|
if null failed
|
|
then return []
|
|
else if shouldretry
|
|
then retry currbranch g u failed
|
|
else fallback branch g u failed
|
|
|
|
updatemap succeeded failed = do
|
|
v <- getAssistant failedPushMap
|
|
changeFailedPushMap v $ \m ->
|
|
M.union (makemap failed) $
|
|
M.difference m (makemap succeeded)
|
|
makemap l = M.fromList $ zip l (repeat now)
|
|
|
|
retry currbranch g u rs = do
|
|
debug ["trying manual pull to resolve failed pushes"]
|
|
void $ manualPull currbranch rs
|
|
go False currbranch g u rs
|
|
|
|
fallback branch g u rs = do
|
|
debug ["fallback pushing to", show rs]
|
|
(succeeded, failed) <- parallelPush g rs (taggedPush u Nothing branch)
|
|
updatemap succeeded failed
|
|
return failed
|
|
|
|
push branch remote = Command.Sync.pushBranch remote (Just branch)
|
|
|
|
parallelPush :: Git.Repo -> [Remote] -> (Remote -> Git.Repo -> IO Bool)-> Assistant ([Remote], [Remote])
|
|
parallelPush g rs a = do
|
|
rgs <- liftAnnex $ mapM topush rs
|
|
(succeededrgs, failedrgs) <- liftIO $ inParallel (uncurry a) rgs
|
|
return (map fst succeededrgs, map fst failedrgs)
|
|
where
|
|
topush r = (,)
|
|
<$> pure r
|
|
<*> (Remote.getRepo r >>= \repo ->
|
|
sshOptionsTo repo (Remote.gitconfig r) g)
|
|
|
|
{- Displays an alert while running an action that syncs with some remotes,
|
|
- and returns any remotes that it failed to sync with.
|
|
-
|
|
- Readonly remotes are also hidden (to hide the web special remote).
|
|
-}
|
|
syncAction :: [Remote] -> ([Remote] -> Assistant [Remote]) -> Assistant [Remote]
|
|
syncAction rs a
|
|
| null visibleremotes = a rs
|
|
| otherwise = do
|
|
i <- addAlert $ syncAlert visibleremotes
|
|
failed <- a rs
|
|
failed' <- filterM (not . Git.repoIsLocalUnknown <$$> liftAnnex . Remote.getRepo) failed
|
|
let succeeded = filter (`notElem` failed) visibleremotes
|
|
if null succeeded && null failed'
|
|
then removeAlert i
|
|
else updateAlertMap $ mergeAlert i $
|
|
syncResultAlert succeeded failed'
|
|
return failed
|
|
where
|
|
visibleremotes = filter (not . Remote.readonly) rs
|
|
|
|
{- Manually pull from remotes and merge their branches. Returns any
|
|
- remotes that it failed to pull from, and a Bool indicating
|
|
- whether the git-annex branches of the remotes and local had
|
|
- diverged before the pull.
|
|
-}
|
|
manualPull :: Command.Sync.CurrBranch -> [Remote] -> Assistant ([Remote], Bool)
|
|
manualPull currentbranch remotes = do
|
|
g <- liftAnnex gitRepo
|
|
failed <- forM remotes $ \r -> if wantpull $ Remote.gitconfig r
|
|
then do
|
|
g' <- liftAnnex $ do
|
|
repo <- Remote.getRepo r
|
|
sshOptionsTo repo (Remote.gitconfig r) g
|
|
ifM (liftIO $ Git.Command.runBool [Param "fetch", Param $ Remote.name r] g')
|
|
( return Nothing
|
|
, return $ Just r
|
|
)
|
|
else return Nothing
|
|
haddiverged <- liftAnnex Annex.Branch.forceUpdate
|
|
forM_ remotes $ \r ->
|
|
liftAnnex $ Command.Sync.mergeRemote r
|
|
currentbranch Command.Sync.mergeConfig def
|
|
when haddiverged $
|
|
updateExportTreeFromLogAll
|
|
return (catMaybes failed, haddiverged)
|
|
where
|
|
wantpull gc = remoteAnnexPull gc
|
|
|
|
{- Start syncing a remote, using a background thread. -}
|
|
syncRemote :: Remote -> Assistant ()
|
|
syncRemote remote = do
|
|
updateSyncRemotes
|
|
thread <- asIO $ do
|
|
reconnectRemotes [remote]
|
|
addScanRemotes True [remote]
|
|
void $ liftIO $ forkIO $ thread
|
|
|
|
{- Use Nothing to change autocommit setting; or a remote to change
|
|
- its sync setting. -}
|
|
changeSyncable :: Maybe Remote -> Bool -> Assistant ()
|
|
changeSyncable Nothing enable = do
|
|
liftAnnex $ Config.setConfig key (boolConfig enable)
|
|
liftIO . maybe noop (`throwTo` signal)
|
|
=<< namedThreadId watchThread
|
|
where
|
|
key = Config.annexConfig "autocommit"
|
|
signal
|
|
| enable = ResumeWatcher
|
|
| otherwise = PauseWatcher
|
|
changeSyncable (Just r) True = do
|
|
liftAnnex $ changeSyncFlag r True
|
|
syncRemote r
|
|
sendRemoteControl RELOAD
|
|
changeSyncable (Just r) False = do
|
|
liftAnnex $ changeSyncFlag r False
|
|
updateSyncRemotes
|
|
{- Stop all transfers to or from this remote.
|
|
- XXX Can't stop any ongoing scan, or git syncs. -}
|
|
void $ dequeueTransfers tofrom
|
|
mapM_ (cancelTransfer False) =<<
|
|
filter tofrom . M.keys . currentTransfers <$> getDaemonStatus
|
|
where
|
|
tofrom t = transferUUID t == Remote.uuid r
|
|
|
|
changeSyncFlag :: Remote -> Bool -> Annex ()
|
|
changeSyncFlag r enabled = do
|
|
repo <- Remote.getRepo r
|
|
let key = Config.remoteAnnexConfig repo "sync"
|
|
Config.setConfig key (boolConfig enabled)
|
|
void Remote.remoteListRefresh
|
|
|
|
updateExportTreeFromLogAll :: Assistant ()
|
|
updateExportTreeFromLogAll = do
|
|
rs <- exportRemotes <$> getDaemonStatus
|
|
forM_ rs $ \r -> liftAnnex $
|
|
openDb (Remote.uuid r) >>= updateExportTreeFromLog
|