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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 Types
import qualified Annex
import qualified Git
import Config
type Version = String
defaultVersion :: Version
defaultVersion = "3"
supportedVersions :: [Version]
supportedVersions = [defaultVersion]
upgradableVersions :: [Version]
upgradableVersions = ["0", "1", "2"]
versionField :: String
versionField = "annex.version"
getVersion :: Annex (Maybe Version)
getVersion = do
g <- Annex.gitRepo
let v = Git.configGet g versionField ""
if not $ null v
then return $ Just v
else return Nothing
setVersion :: Annex ()
setVersion = setConfig versionField defaultVersion
checkVersion :: Version -> Annex ()
checkVersion v
| v `elem` supportedVersions = return ()
| v `elem` upgradableVersions = err "Upgrade this repository: git-annex upgrade"
| otherwise = err "Upgrade git-annex."
where
err msg = error $ "Repository version " ++ v ++
" is not supported. " ++ msg
|
