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|
{- .git/objects
-
- Copyright 2013 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Git.Objects where
import Common
import Git
import Git.Sha
objectsDir :: Repo -> FilePath
objectsDir r = localGitDir r </> "objects"
packDir :: Repo -> FilePath
packDir r = objectsDir r </> "pack"
packIdxFile :: FilePath -> FilePath
packIdxFile = flip replaceExtension "idx"
listPackFiles :: Repo -> IO [FilePath]
listPackFiles r = filter (".pack" `isSuffixOf`)
<$> catchDefaultIO [] (dirContents $ packDir r)
listLooseObjectShas :: Repo -> IO [Sha]
listLooseObjectShas r = catchDefaultIO [] $
mapMaybe (extractSha . concat . reverse . take 2 . reverse . splitDirectories)
<$> dirContentsRecursiveSkipping (== "pack") True (objectsDir r)
looseObjectFile :: Repo -> Sha -> FilePath
looseObjectFile r sha = objectsDir r </> prefix </> rest
where
(prefix, rest) = splitAt 2 (fromRef sha)
listAlternates :: Repo -> IO [FilePath]
listAlternates r = catchDefaultIO [] (lines <$> readFile alternatesfile)
where
alternatesfile = objectsDir r </> "info" </> "alternates"
{- A repository recently cloned with --shared will have one or more
- alternates listed, and contain no loose objects or packs. -}
isSharedClone :: Repo -> IO Bool
isSharedClone r = allM id
[ not . null <$> listAlternates r
, null <$> listLooseObjectShas r
, null <$> listPackFiles r
]
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