62beaa1a86
Having one module that knows about all the filenames used on the branch allows working back from an arbitrary filename to enough information about it to implement dropping dead remotes and doing other log file compacting as part of a forget transition.
137 lines
3.9 KiB
Haskell
137 lines
3.9 KiB
Haskell
{- git-annex v2 -> v3 upgrade support
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-
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- Copyright 2011 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.V2 where
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import Common.Annex
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import qualified Git
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import qualified Git.Command
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import qualified Git.Ref
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import qualified Annex.Branch
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import Annex.Content
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import Utility.Tmp
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import Logs
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olddir :: Git.Repo -> FilePath
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olddir g
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| Git.repoIsLocalBare g = ""
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| otherwise = ".git-annex"
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{- .git-annex/ moved to a git-annex branch.
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-
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- Strategy:
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-
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- * Create the git-annex branch.
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- * Find each location log file in .git-annex/, and inject its content
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- into the git-annex branch, unioning with any content already in
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- there. (in passing, this deals with the semi transition that left
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- some location logs hashed two different ways; both are found and
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- merged).
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- * Also inject remote.log, trust.log, and uuid.log.
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- * git rm -rf .git-annex
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- * Remove stuff that used to be needed in .gitattributes.
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- * Commit changes.
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-}
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upgrade :: Annex Bool
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upgrade = do
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showAction "v2 to v3"
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bare <- fromRepo Git.repoIsLocalBare
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old <- fromRepo olddir
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Annex.Branch.create
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showProgress
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e <- liftIO $ doesDirectoryExist old
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when e $ do
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mapM_ (\(k, f) -> inject f $ locationLogFile k) =<< locationLogs
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mapM_ (\f -> inject f f) =<< logFiles old
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saveState False
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showProgress
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when e $ do
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inRepo $ Git.Command.run [Param "rm", Param "-r", Param "-f", Param "-q", File old]
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unless bare $ inRepo gitAttributesUnWrite
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showProgress
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unless bare push
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return True
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locationLogs :: Annex [(Key, FilePath)]
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locationLogs = do
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dir <- fromRepo gitStateDir
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liftIO $ do
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levela <- dirContents dir
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levelb <- mapM tryDirContents levela
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files <- mapM tryDirContents (concat levelb)
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return $ mapMaybe islogfile (concat files)
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where
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tryDirContents d = catchDefaultIO [] $ dirContents d
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islogfile f = maybe Nothing (\k -> Just (k, f)) $
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locationLogFileKey f
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inject :: FilePath -> FilePath -> Annex ()
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inject source dest = do
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old <- fromRepo olddir
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new <- liftIO (readFile $ old </> source)
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Annex.Branch.change dest $ \prev ->
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unlines $ nub $ lines prev ++ lines new
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logFiles :: FilePath -> Annex [FilePath]
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logFiles dir = return . filter (".log" `isSuffixOf`)
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<=< liftIO $ getDirectoryContents dir
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push :: Annex ()
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push = do
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origin_master <- inRepo $ Git.Ref.exists $ Git.Ref "origin/master"
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origin_gitannex <- Annex.Branch.hasOrigin
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case (origin_master, origin_gitannex) of
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(_, True) -> do
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-- Merge in the origin's git-annex branch,
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-- so that pushing the git-annex branch
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-- will immediately work. Not pushed here,
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-- because it's less obnoxious to let the user
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-- push.
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Annex.Branch.update
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(True, False) -> do
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-- push git-annex to origin, so that
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-- "git push" will from then on
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-- automatically push it
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Annex.Branch.update -- just in case
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showAction "pushing new git-annex branch to origin"
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showOutput
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inRepo $ Git.Command.run
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[Param "push", Param "origin", Param $ show Annex.Branch.name]
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_ -> do
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-- no origin exists, so just let the user
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-- know about the new branch
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Annex.Branch.update
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showLongNote $
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"git-annex branch created\n" ++
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"Be sure to push this branch when pushing to remotes.\n"
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{- Old .gitattributes contents, not needed anymore. -}
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attrLines :: [String]
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attrLines =
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[ stateDir </> "*.log merge=union"
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, stateDir </> "*/*/*.log merge=union"
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]
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gitAttributesUnWrite :: Git.Repo -> IO ()
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gitAttributesUnWrite repo = do
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let attributes = Git.attributes repo
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whenM (doesFileExist attributes) $ do
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c <- readFileStrict attributes
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liftIO $ viaTmp writeFile attributes $ unlines $
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filter (`notElem` attrLines) $ lines c
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Git.Command.run [Param "add", File attributes] repo
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stateDir :: FilePath
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stateDir = addTrailingPathSeparator ".git-annex"
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gitStateDir :: Git.Repo -> FilePath
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gitStateDir repo = addTrailingPathSeparator $ Git.repoPath repo </> stateDir
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