64 lines
1.7 KiB
Haskell
64 lines
1.7 KiB
Haskell
{- .git/objects
|
|
-
|
|
- Copyright 2013 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
{-# LANGUAGE OverloadedStrings #-}
|
|
|
|
module Git.Objects where
|
|
|
|
import Common
|
|
import Git
|
|
import Git.Sha
|
|
import qualified Utility.OsString as OS
|
|
|
|
import qualified Data.ByteString as B
|
|
objectsDir :: Repo -> OsPath
|
|
objectsDir r = localGitDir r </> literalOsPath "objects"
|
|
|
|
packDir :: Repo -> OsPath
|
|
packDir r = objectsDir r </> literalOsPath "pack"
|
|
|
|
packIdxFile :: OsPath -> OsPath
|
|
packIdxFile = flip replaceExtension (literalOsPath "idx")
|
|
|
|
listPackFiles :: Repo -> IO [OsPath]
|
|
listPackFiles r = filter (literalOsPath ".pack" `OS.isSuffixOf`)
|
|
<$> catchDefaultIO [] (dirContents $ packDir r)
|
|
|
|
listLooseObjectShas :: Repo -> IO [Sha]
|
|
listLooseObjectShas r = catchDefaultIO [] $
|
|
mapMaybe conv <$> emptyWhenDoesNotExist
|
|
(dirContentsRecursiveSkipping ispackdir True (objectsDir r))
|
|
where
|
|
conv :: OsPath -> Maybe Sha
|
|
conv = extractSha
|
|
. fromOsPath
|
|
. OS.concat
|
|
. reverse
|
|
. take 2
|
|
. reverse
|
|
. splitDirectories
|
|
ispackdir f = f == literalOsPath "pack"
|
|
|
|
looseObjectFile :: Repo -> Sha -> OsPath
|
|
looseObjectFile r sha = objectsDir r </> toOsPath prefix </> toOsPath rest
|
|
where
|
|
(prefix, rest) = B.splitAt 2 (fromRef' sha)
|
|
|
|
listAlternates :: Repo -> IO [FilePath]
|
|
listAlternates r = catchDefaultIO [] $
|
|
lines <$> readFile (fromOsPath alternatesfile)
|
|
where
|
|
alternatesfile = objectsDir r </> literalOsPath "info" </> literalOsPath "alternates"
|
|
|
|
{- A repository recently cloned with --shared will have one or more
|
|
- alternates listed, and contain no loose objects or packs. -}
|
|
isSharedClone :: Repo -> IO Bool
|
|
isSharedClone r = allM id
|
|
[ not . null <$> listAlternates r
|
|
, null <$> listLooseObjectShas r
|
|
, null <$> listPackFiles r
|
|
]
|