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|
{- git-annex-shell command
-
- Copyright 2014 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.NotifyChanges where
import Command
import Annex.ChangedRefs
import RemoteDaemon.Transport.Ssh.Types
import Utility.SimpleProtocol
import Control.Concurrent.Async
cmd :: Command
cmd = noCommit $
command "notifychanges" SectionPlumbing
"sends notification when git refs are changed"
paramNothing (withParams seek)
seek :: CmdParams -> CommandSeek
seek = withNothing start
start :: CommandStart
start = do
h <- watchChangedRefs
-- No messages need to be received from the caller,
-- but when it closes the connection, notice and terminate.
let receiver = forever $ void $ getProtocolLine stdin
let sender = forever $ send . CHANGED =<< waitChangedRefs h
liftIO $ send READY
void $ liftIO $ concurrently sender receiver
liftIO $ stopWatchingChangedRefs h
stop
send :: Notification -> IO ()
send n = do
putStrLn $ unwords $ formatMessage n
hFlush stdout
|
