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{- git-annex upgrade support
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Upgrade where
import Common.Annex
import Annex.Version
#ifndef mingw32_HOST_OS
import qualified Upgrade.V0
import qualified Upgrade.V1
#endif
import qualified Upgrade.V2
import qualified Upgrade.V4
checkUpgrade :: Version -> Annex ()
checkUpgrade = maybe noop error <=< needsUpgrade
needsUpgrade :: Version -> Annex (Maybe String)
needsUpgrade v
| v `elem` supportedVersions = ok
| v `elem` autoUpgradeableVersions = ifM (upgrade True)
( ok
, err "Automatic upgrade failed!"
)
| v `elem` upgradableVersions = err "Upgrade this repository: git-annex upgrade"
| otherwise = err "Upgrade git-annex."
where
err msg = return $ Just $ "Repository version " ++ v ++
" is not supported. " ++ msg
ok = return Nothing
upgrade :: Bool -> Annex Bool
upgrade automatic = go =<< getVersion
where
#ifndef mingw32_HOST_OS
go (Just "0") = Upgrade.V0.upgrade
go (Just "1") = Upgrade.V1.upgrade
#else
go (Just "0") = error "upgrade from v0 on Windows not supported"
go (Just "1") = error "upgrade from v1 on Windows not supported"
#endif
go (Just "2") = Upgrade.V2.upgrade
go (Just "4") = Upgrade.V4.upgrade automatic
go _ = return True
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