git-annex/Upgrade.hs

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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 #-}
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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
import qualified Upgrade.V0
import qualified Upgrade.V1
#endif
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import qualified Upgrade.V2
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upgrade :: Annex Bool
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upgrade = go =<< getVersion
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where
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#ifndef mingw32_HOST_OS
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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
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go (Just "2") = Upgrade.V2.upgrade
go _ = return True