02ec8ea012
This avoids forking another process, avoids polling, fixes a race, and avoids a rare forkProcess thread hang that I saw once time when starting the webapp.
38 lines
964 B
Haskell
38 lines
964 B
Haskell
{- git-annex watch command
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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 Command.Watch where
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import Common.Annex
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import Assistant
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import Command
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import Option
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def :: [Command]
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def = [withOptions [foregroundOption, stopOption] $
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command "watch" paramNothing seek "watch for changes"]
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mkSeek :: Bool -> [CommandSeek]
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mkSeek assistant = [withFlag stopOption $ \stopdaemon ->
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withFlag foregroundOption $ \foreground ->
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withNothing $ start assistant foreground stopdaemon]
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seek :: [CommandSeek]
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seek = mkSeek False
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foregroundOption :: Option
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foregroundOption = Option.flag [] "foreground" "do not daemonize"
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stopOption :: Option
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stopOption = Option.flag [] "stop" "stop daemon"
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start :: Bool -> Bool -> Bool -> CommandStart
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start assistant foreground stopdaemon = notBareRepo $ do
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if stopdaemon
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then stopDaemon
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else startDaemon assistant foreground Nothing -- does not return
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stop
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