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|
{- git-annex command
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.Get where
import Common.Annex
import Command
import qualified Remote
import Annex.Content
import qualified Command.Move
def :: [Command]
def = [withOptions [Command.Move.fromOption] $ command "get" paramPaths seek
"make content of annexed files available"]
seek :: [CommandSeek]
seek = [withField Command.Move.fromOption Remote.byName $ \from ->
withFilesInGit $ whenAnnexed $ start from]
start :: Maybe Remote -> FilePath -> (Key, Backend) -> CommandStart
start from file (key, _) = stopUnless (not <$> inAnnex key) $
autoCopies file key (<) $ \_numcopies ->
case from of
Nothing -> go $ perform key
Just src -> do
-- get --from = copy --from
stopUnless (Command.Move.fromOk src key) $
go $ Command.Move.fromPerform src False key
where
go a = do
showStart "get" file
next a
perform :: Key -> CommandPerform
perform key = stopUnless (getViaTmp key $ getKeyFile key) $
next $ return True -- no cleanup needed
{- Try to find a copy of the file in one of the remotes,
- and copy it to here. -}
getKeyFile :: Key -> FilePath -> Annex Bool
getKeyFile key file = dispatch =<< Remote.keyPossibilities key
where
dispatch [] = do
showNote "not available"
Remote.showLocations key []
return False
dispatch remotes = trycopy remotes remotes
trycopy full [] = do
Remote.showTriedRemotes full
Remote.showLocations key []
return False
trycopy full (r:rs) =
ifM (probablyPresent r)
( docopy r (trycopy full rs)
, trycopy full rs
)
-- This check is to avoid an ugly message if a remote is a
-- drive that is not mounted.
probablyPresent r
| Remote.hasKeyCheap r =
either (const False) id <$> Remote.hasKey r key
| otherwise = return True
docopy r continue = do
showAction $ "from " ++ Remote.name r
ifM (Remote.retrieveKeyFile r key file)
( return True , continue)
|
