112 lines
3.1 KiB
Haskell
112 lines
3.1 KiB
Haskell
{- git-annex command
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-
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- Copyright 2015 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.Smudge where
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import Command
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import qualified Annex
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import Annex.Content
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import Annex.Link
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import Annex.FileMatcher
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import Annex.Ingest
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import Annex.CatFile
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import Logs.Location
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import qualified Database.Keys
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import Git.FilePath
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import Backend
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import qualified Data.ByteString.Lazy as B
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cmd :: Command
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cmd = noCommit $ noMessages $
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command "smudge" SectionPlumbing
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"git smudge filter"
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paramFile (seek <$$> optParser)
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data SmudgeOptions = SmudgeOptions
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{ smudgeFile :: FilePath
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, cleanOption :: Bool
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}
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optParser :: CmdParamsDesc -> Parser SmudgeOptions
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optParser desc = SmudgeOptions
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<$> argument str ( metavar desc )
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<*> switch ( long "clean" <> help "clean filter" )
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seek :: SmudgeOptions -> CommandSeek
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seek o = commandAction $
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(if cleanOption o then clean else smudge) (smudgeFile o)
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-- Smudge filter is fed git file content, and if it's a pointer to an
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-- available annex object, should output its content.
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smudge :: FilePath -> CommandStart
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smudge file = do
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b <- liftIO $ B.hGetContents stdin
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case parseLinkOrPointer b of
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Nothing -> liftIO $ B.putStr b
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Just k -> do
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Database.Keys.addAssociatedFile k =<< inRepo (toTopFilePath file)
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-- A previous unlocked checkout of the file may have
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-- led to the annex object getting modified;
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-- don't provide such modified content as it
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-- will be confusing. inAnnex will detect such
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-- modifications.
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ifM (inAnnex k)
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( do
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content <- calcRepo (gitAnnexLocation k)
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whenM (annexThin <$> Annex.getGitConfig) $
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warning $ "Not able to honor annex.thin when git is checking out " ++ file ++ " (run git annex fix to re-thin files)"
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liftIO $ B.putStr . fromMaybe b
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=<< catchMaybeIO (B.readFile content)
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, liftIO $ B.putStr b
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)
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stop
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-- Clean filter is fed file content on stdin, decides if a file
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-- should be stored in the annex, and outputs a pointer to its
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-- injested content.
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clean :: FilePath -> CommandStart
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clean file = do
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b <- liftIO $ B.hGetContents stdin
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if isJust (parseLinkOrPointer b)
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then liftIO $ B.hPut stdout b
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else ifM (shouldAnnex file)
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( do
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-- Even though we ingest the actual file,
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-- and not stdin, we need to consume all
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-- stdin, or git will get annoyed.
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B.length b `seq` return ()
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-- Look up the backend that was used
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-- for this file before, so that when
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-- git re-cleans a file its backend does
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-- not change.
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currbackend <- maybe Nothing (maybeLookupBackendName . keyBackendName)
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<$> catKeyFile file
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liftIO . emitPointer
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=<< go
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=<< ingest' currbackend
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=<< lockDown cfg file
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, liftIO $ B.hPut stdout b
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)
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stop
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where
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go (Just k, _) = do
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logStatus k InfoPresent
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return k
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go _ = error "could not add file to the annex"
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cfg = LockDownConfig
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{ lockingFile = False
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, hardlinkFileTmp = False
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}
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shouldAnnex :: FilePath -> Annex Bool
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shouldAnnex file = do
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matcher <- largeFilesMatcher
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checkFileMatcher matcher file
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emitPointer :: Key -> IO ()
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emitPointer = putStr . formatPointer
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