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|
{- git-annex command
-
- Copyright 2010, 2013 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 Annex.Transfer
import Config.NumCopies
import Annex.Wanted
import qualified Command.Move
def :: [Command]
def = [withOptions getOptions $ command "get" paramPaths seek
SectionCommon "make content of annexed files available"]
getOptions :: [Option]
getOptions = fromOption : keyOptions
seek :: CommandSeek
seek ps = do
from <- getOptionField fromOption Remote.byNameWithUUID
withKeyOptions
(startKeys from)
(withFilesInGit $ whenAnnexed $ start from)
ps
start :: Maybe Remote -> FilePath -> Key -> CommandStart
start from file key = start' expensivecheck from key (Just file)
where
expensivecheck = checkAuto (numCopiesCheck file key (<) <||> wantGet False (Just key) (Just file))
startKeys :: Maybe Remote -> Key -> CommandStart
startKeys from key = start' (return True) from key Nothing
start' :: Annex Bool -> Maybe Remote -> Key -> AssociatedFile -> CommandStart
start' expensivecheck from key afile = stopUnless (not <$> inAnnex key) $
stopUnless expensivecheck $
case from of
Nothing -> go $ perform key afile
Just src ->
stopUnless (Command.Move.fromOk src key) $
go $ Command.Move.fromPerform src False key afile
where
go a = do
showStart' "get" key afile
next a
perform :: Key -> AssociatedFile -> CommandPerform
perform key afile = stopUnless (getViaTmp key $ getKeyFile key afile) $
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 -> AssociatedFile -> FilePath -> Annex Bool
getKeyFile key afile dest = getKeyFile' key afile dest
=<< Remote.keyPossibilities key
getKeyFile' :: Key -> AssociatedFile -> FilePath -> [Remote] -> Annex Bool
getKeyFile' key afile dest = dispatch
where
dispatch [] = do
showNote "not available"
showlocs
return False
dispatch remotes = notifyTransfer Download afile $ trycopy remotes remotes
trycopy full [] _ = do
Remote.showTriedRemotes full
showlocs
return False
trycopy full (r:rs) witness =
ifM (probablyPresent r)
( docopy r witness <||> trycopy full rs witness
, trycopy full rs witness
)
showlocs = Remote.showLocations key []
"No other repository is known to contain the file."
-- 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 = download (Remote.uuid r) key afile noRetry $ \p -> do
showAction $ "from " ++ Remote.name r
Remote.retrieveKeyFile r key afile dest p
|
