56 lines
1.4 KiB
Haskell
56 lines
1.4 KiB
Haskell
{- git-annex upgrade support
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-
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- Copyright 2010, 2013 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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{-# LANGUAGE CPP #-}
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module Upgrade where
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import Common.Annex
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import Annex.Version
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#ifndef mingw32_HOST_OS
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import qualified Upgrade.V0
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import qualified Upgrade.V1
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#endif
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import qualified Upgrade.V2
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import qualified Upgrade.V3
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import qualified Upgrade.V4
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checkUpgrade :: Version -> Annex ()
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checkUpgrade = maybe noop error <=< needsUpgrade
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needsUpgrade :: Version -> Annex (Maybe String)
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needsUpgrade v
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| v == supportedVersion = ok
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| v `elem` autoUpgradeableVersions = ifM (upgrade True)
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( ok
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, err "Automatic upgrade failed!"
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)
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| v `elem` upgradableVersions = err "Upgrade this repository: git-annex upgrade"
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| otherwise = err "Upgrade git-annex."
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where
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err msg = return $ Just $ "Repository version " ++ v ++
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" is not supported. " ++ msg
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ok = return Nothing
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upgrade :: Bool -> Annex Bool
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upgrade automatic = do
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upgraded <- go =<< getVersion
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when upgraded $
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setVersion supportedVersion
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return upgraded
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where
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#ifndef mingw32_HOST_OS
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go (Just "0") = Upgrade.V0.upgrade
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go (Just "1") = Upgrade.V1.upgrade
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#else
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go (Just "0") = error "upgrade from v0 on Windows not supported"
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go (Just "1") = error "upgrade from v1 on Windows not supported"
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#endif
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go (Just "2") = Upgrade.V2.upgrade
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go (Just "3") = Upgrade.V3.upgrade automatic
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go (Just "4") = Upgrade.V4.upgrade automatic
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go _ = return True
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