94 lines
2.8 KiB
Haskell
94 lines
2.8 KiB
Haskell
{- git-annex command
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-
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- Copyright 2010, 2013 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.Get where
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import Common.Annex
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import Command
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import qualified Remote
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import Annex.Content
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import Logs.Transfer
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import Config.NumCopies
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import Annex.Wanted
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import qualified Command.Move
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def :: [Command]
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def = [withOptions getOptions $ command "get" paramPaths seek
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SectionCommon "make content of annexed files available"]
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getOptions :: [Option]
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getOptions = fromOption : keyOptions
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seek :: CommandSeek
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seek ps = do
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from <- getOptionField fromOption Remote.byNameWithUUID
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withKeyOptions
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(startKeys from)
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(withFilesInGit $ whenAnnexed $ start from)
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ps
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start :: Maybe Remote -> FilePath -> (Key, Backend) -> CommandStart
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start from file (key, _) = start' expensivecheck from key (Just file)
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where
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expensivecheck = checkAuto (numCopiesCheck file key (<) <||> wantGet False (Just key) (Just file))
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startKeys :: Maybe Remote -> Key -> CommandStart
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startKeys from key = start' (return True) from key Nothing
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start' :: Annex Bool -> Maybe Remote -> Key -> AssociatedFile -> CommandStart
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start' expensivecheck from key afile = stopUnless (not <$> inAnnex key) $
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stopUnless expensivecheck $
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case from of
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Nothing -> go $ perform key afile
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Just src ->
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stopUnless (Command.Move.fromOk src key) $
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go $ Command.Move.fromPerform src False key afile
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where
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go a = do
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showStart' "get" key afile
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next a
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perform :: Key -> AssociatedFile -> CommandPerform
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perform key afile = stopUnless (getViaTmp key $ getKeyFile key afile) $
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next $ return True -- no cleanup needed
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{- Try to find a copy of the file in one of the remotes,
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- and copy it to here. -}
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getKeyFile :: Key -> AssociatedFile -> FilePath -> Annex Bool
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getKeyFile key afile dest = getKeyFile' key afile dest
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=<< Remote.keyPossibilities key
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getKeyFile' :: Key -> AssociatedFile -> FilePath -> [Remote] -> Annex Bool
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getKeyFile' key afile dest = dispatch
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where
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dispatch [] = do
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showNote "not available"
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showlocs
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return False
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dispatch remotes = trycopy remotes remotes
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trycopy full [] = do
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Remote.showTriedRemotes full
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showlocs
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return False
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trycopy full (r:rs) =
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ifM (probablyPresent r)
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( docopy r (trycopy full rs)
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, trycopy full rs
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)
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showlocs = Remote.showLocations key []
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"No other repository is known to contain the file."
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-- This check is to avoid an ugly message if a remote is a
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-- drive that is not mounted.
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probablyPresent r
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| Remote.hasKeyCheap r =
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either (const False) id <$> Remote.hasKey r key
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| otherwise = return True
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docopy r continue = do
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ok <- download (Remote.uuid r) key afile noRetry $ \p -> do
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showAction $ "from " ++ Remote.name r
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Remote.retrieveKeyFile r key afile dest p
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if ok then return ok else continue
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