70 lines
1.6 KiB
Haskell
70 lines
1.6 KiB
Haskell
{- git-annex repository versioning
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-
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- Copyright 2010 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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module Version where
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import Control.Monad.State (liftIO)
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import Control.Monad (unless)
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import System.Directory
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import Types
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import qualified Annex
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import qualified GitRepo as Git
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import Locations
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import Config
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type Version = String
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defaultVersion :: Version
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defaultVersion = "2"
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supportedVersions :: [Version]
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supportedVersions = [defaultVersion]
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upgradableVersions :: [Version]
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upgradableVersions = ["0", "1"]
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versionField :: String
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versionField = "annex.version"
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getVersion :: Annex Version
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getVersion = do
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g <- Annex.gitRepo
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let v = Git.configGet g versionField ""
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if not $ null v
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then return v
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else do
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-- version 0 was not recorded in .git/config;
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-- such a repo should have an gitAnnexDir but no
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-- gitAnnexObjectDir.
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--
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-- version 1 may not be recorded if the user
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-- forgot to init. Such a repo should have a
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-- gitAnnexObjectDir already.
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d <- liftIO $ doesDirectoryExist $ gitAnnexDir g
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o <- liftIO $ doesDirectoryExist $ gitAnnexObjectDir g
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case (d, o) of
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(True, False) -> return "0"
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(True, True) -> return "1"
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_ -> do
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setVersion
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return defaultVersion
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setVersion :: Annex ()
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setVersion = setConfig versionField defaultVersion
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checkVersion :: Annex ()
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checkVersion = do
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v <- getVersion
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unless (v `elem` supportedVersions) $ do
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error $ "Repository version " ++ v ++
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" is not supported. " ++
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msg v
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where
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msg v
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| v `elem` upgradableVersions = "Upgrade this repository: git-annex upgrade"
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| otherwise = "Upgrade git-annex."
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