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{- git-annex-shell command
-
- Copyright 2015 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.LockContent where
import Command
import Annex.Content
import Remote.Helper.Ssh (contentLockedMarker)
import Utility.SimpleProtocol
cmd :: Command
cmd = noCommit $
command "lockcontent" SectionPlumbing
"locks key's content in the annex, preventing it being dropped"
paramKey
(withParams seek)
seek :: CmdParams -> CommandSeek
seek = withWords start
-- First, lock the content. Then, make sure the content is actually
-- present, and print out "OK". Wait for the caller to send a line before
-- dropping the lock.
start :: [String] -> CommandStart
start [ks] = do
ok <- lockContentShared k (const locksuccess)
`catchNonAsync` (const $ return False)
liftIO $ if ok
then exitSuccess
else exitFailure
where
k = fromMaybe (giveup "bad key") (file2key ks)
locksuccess = ifM (inAnnex k)
( liftIO $ do
putStrLn contentLockedMarker
hFlush stdout
_ <- getProtocolLine stdin
return True
, return False
)
start _ = giveup "Specify exactly 1 key."
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