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|
{- git-annex repository versioning
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Version where
import Control.Monad.State (liftIO)
import System.Directory
import Types
import qualified Annex
import qualified GitRepo as Git
import Locations
type Version = String
defaultVersion :: Version
defaultVersion = "2"
supportedVersions :: [Version]
supportedVersions = [defaultVersion]
versionField :: String
versionField = "annex.version"
getVersion :: Annex Version
getVersion = do
g <- Annex.gitRepo
let v = Git.configGet g versionField ""
if not $ null v
then return v
else do
-- version 0 was not recorded in .git/config;
-- such a repo should have an gitAnnexDir but no
-- gitAnnexObjectDir.
--
-- version 1 may not be recorded if the user
-- forgot to init. Such a repo should have a
-- gitAnnexObjectDir already.
d <- liftIO $ doesDirectoryExist $ gitAnnexDir g
o <- liftIO $ doesDirectoryExist $ gitAnnexObjectDir g
case (d, o) of
(True, False) -> return "0"
(True, True) -> return "1"
_ -> do
setVersion
return defaultVersion
setVersion :: Annex ()
setVersion = Annex.setConfig versionField defaultVersion
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