3a05d53761
No behavior changes (hopefully), just adding SeekInput and plumbing it through to the JSON display code for later use. Over the course of 2 grueling days. withFilesNotInGit reimplemented in terms of seekHelper should be the only possible behavior change. It seems to test as behaving the same. Note that seekHelper dummies up the SeekInput in the case where segmentPaths' gives up on sorting the expanded paths because there are too many input paths. When SeekInput later gets exposed as a json field, that will result in it being a little bit wrong in the case where 100 or more paths are passed to a git-annex command. I think this is a subtle enough problem to not matter. If it does turn out to be a problem, fixing it would require splitting up the input parameters into groups of < 100, which would make git ls-files run perhaps more than is necessary. May want to revisit this, because that fix seems fairly low-impact.
122 lines
3.9 KiB
Haskell
122 lines
3.9 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 AGPL 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, jsonOptions, jsonProgressOption, annexedMatchingOptions] $
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command "get" SectionCommon
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"make content of annexed files available"
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paramPaths (seek <$$> optParser)
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data GetOptions = GetOptions
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{ getFiles :: CmdParams
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, getFrom :: Maybe (DeferredParse Remote)
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, autoMode :: Bool
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, keyOptions :: Maybe KeyOptions
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, batchOption :: BatchMode
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}
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optParser :: CmdParamsDesc -> Parser GetOptions
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optParser desc = GetOptions
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<$> cmdParams desc
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<*> optional (parseRemoteOption <$> parseFromOption)
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<*> parseAutoOption
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<*> optional (parseIncompleteOption <|> parseKeyOptions <|> parseFailedTransfersOption)
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<*> parseBatchOption
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seek :: GetOptions -> CommandSeek
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seek o = startConcurrency downloadStages $ do
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from <- maybe (pure Nothing) (Just <$$> getParsed) (getFrom o)
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let seeker = AnnexedFileSeeker
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{ startAction = start o from
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, checkContentPresent = Just False
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, usesLocationLog = True
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}
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case batchOption o of
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NoBatch -> withKeyOptions (keyOptions o) (autoMode o) seeker
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(commandAction . startKeys from)
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(withFilesInGitAnnex ww seeker)
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=<< workTreeItems ww (getFiles o)
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Batch fmt -> batchAnnexedFilesMatching fmt seeker
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where
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ww = WarnUnmatchLsFiles
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start :: GetOptions -> Maybe Remote -> SeekInput -> RawFilePath -> Key -> CommandStart
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start o from si file key = start' expensivecheck from key afile ai si
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where
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afile = AssociatedFile (Just file)
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ai = mkActionItem (key, afile)
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expensivecheck
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| autoMode o = numCopiesCheck (fromRawFilePath file) key (<)
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<||> wantGet False (Just key) afile
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| otherwise = return True
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startKeys :: Maybe Remote -> (SeekInput, Key, ActionItem) -> CommandStart
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startKeys from (si, key, ai) = checkFailedTransferDirection ai Download $
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start' (return True) from key (AssociatedFile Nothing) ai si
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start' :: Annex Bool -> Maybe Remote -> Key -> AssociatedFile -> ActionItem -> SeekInput -> CommandStart
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start' expensivecheck from key afile ai si =
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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 Command.Move.RemoveNever key afile
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where
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go = starting "get" (OnlyActionOn key ai) si
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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 $ \witness -> do
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ok <- pickRemote remotes $ \r -> ifM (probablyPresent r)
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( docopy r witness
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, return False
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)
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if ok
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then return ok
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else do
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Remote.showTriedRemotes remotes
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showlocs
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return False
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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 (Remote.retrievalSecurityPolicy r) (RemoteVerify r) key $ \dest ->
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download (Remote.uuid r) key afile stdRetry
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(\p -> do
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showAction $ "from " ++ Remote.name r
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Remote.verifiedAction (Remote.retrieveKeyFile r key afile dest p)
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) witness
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