108 lines
3.2 KiB
Haskell
108 lines
3.2 KiB
Haskell
{- git-annex command
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-
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- Copyright 2010, 2013 Joey Hess <id@joeyh.name>
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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 Command
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import qualified Remote
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import Annex.Content
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import Annex.Transfer
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import Annex.NumCopies
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import Annex.Wanted
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import qualified Command.Move
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cmd :: Command
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cmd = withGlobalOptions (jobsOption : annexedMatchingOptions) $
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command "get" SectionCommon
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"make content of annexed files available"
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paramPaths (seek <$$> optParser)
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data GetOptions = GetOptions
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{ getFiles :: CmdParams
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, getFrom :: Maybe (DeferredParse Remote)
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, autoMode :: Bool
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, keyOptions :: Maybe KeyOptions
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}
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optParser :: CmdParamsDesc -> Parser GetOptions
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optParser desc = GetOptions
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<$> cmdParams desc
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<*> optional parseFromOption
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<*> parseAutoOption
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<*> optional (parseKeyOptions True)
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seek :: GetOptions -> CommandSeek
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seek o = allowConcurrentOutput $ do
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from <- maybe (pure Nothing) (Just <$$> getParsed) (getFrom o)
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withKeyOptions (keyOptions o) (autoMode o)
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(startKeys from)
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(withFilesInGit $ whenAnnexed $ start o from)
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(getFiles o)
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start :: GetOptions -> Maybe Remote -> FilePath -> Key -> CommandStart
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start o from file key = start' expensivecheck from key (Just file)
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where
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expensivecheck
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| autoMode o = numCopiesCheck file key (<) <||> wantGet False (Just key) (Just file)
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| otherwise = return True
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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 (getKey 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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getKey :: Key -> AssociatedFile -> Annex Bool
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getKey key afile = getKey' key afile =<< Remote.keyPossibilities key
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getKey' :: Key -> AssociatedFile -> [Remote] -> Annex Bool
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getKey' key afile = 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 = notifyTransfer Download afile $ 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) witness =
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ifM (probablyPresent r)
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( docopy r witness <||> trycopy full rs witness
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, trycopy full rs witness
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)
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showlocs = Remote.showLocations False 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 witness = getViaTmp (RemoteVerify r) key $ \dest ->
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download (Remote.uuid r) key afile noRetry noObserver
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(\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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) witness
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