bf460a0a98
Many functions took the repo as their first parameter. Changing it consistently to be the last parameter allows doing some useful things with currying, that reduce boilerplate. In particular, g <- gitRepo is almost never needed now, instead use inRepo to run an IO action in the repo, and fromRepo to get a value from the repo. This also provides more opportunities to use monadic and applicative combinators.
54 lines
1.4 KiB
Haskell
54 lines
1.4 KiB
Haskell
{- git-annex v0 -> v1 upgrade support
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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 Upgrade.V0 where
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import System.IO.Error (try)
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import Common.Annex
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import Annex.Content
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import qualified Upgrade.V1
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upgrade :: Annex Bool
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upgrade = do
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showAction "v0 to v1"
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-- do the reorganisation of the key files
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olddir <- fromRepo gitAnnexDir
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keys <- getKeysPresent0 olddir
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forM_ keys $ \k -> moveAnnex k $ olddir </> keyFile0 k
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-- update the symlinks to the key files
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-- No longer needed here; V1.upgrade does the same thing
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-- Few people had v0 repos, so go the long way around from 0 -> 1 -> 2
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Upgrade.V1.upgrade
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-- these stayed unchanged between v0 and v1
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keyFile0 :: Key -> FilePath
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keyFile0 = Upgrade.V1.keyFile1
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fileKey0 :: FilePath -> Key
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fileKey0 = Upgrade.V1.fileKey1
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lookupFile0 :: FilePath -> Annex (Maybe (Key, Backend Annex))
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lookupFile0 = Upgrade.V1.lookupFile1
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getKeysPresent0 :: FilePath -> Annex [Key]
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getKeysPresent0 dir = do
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exists <- liftIO $ doesDirectoryExist dir
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if not exists
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then return []
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else do
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contents <- liftIO $ getDirectoryContents dir
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files <- liftIO $ filterM present contents
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return $ map fileKey0 files
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where
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present d = do
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result <- try $
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getFileStatus $ dir ++ "/" ++ takeFileName d
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case result of
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Right s -> return $ isRegularFile s
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Left _ -> return False
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