92 lines
2.7 KiB
Haskell
92 lines
2.7 KiB
Haskell
{- 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
|
|
|
|
cmd :: [Command]
|
|
cmd = [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
|