244 lines
6.7 KiB
Haskell
244 lines
6.7 KiB
Haskell
{- git-annex repository initialization
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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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{-# LANGUAGE CPP #-}
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module Annex.Init (
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ensureInitialized,
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isInitialized,
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initialize,
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initialize',
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uninitialize,
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probeCrippledFileSystem,
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) where
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import Common.Annex
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import qualified Annex
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import qualified Git
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import qualified Git.LsFiles
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import qualified Git.Config
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import qualified Git.Construct
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import qualified Git.Types as Git
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import qualified Annex.Branch
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import Logs.UUID
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import Annex.Version
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import Annex.UUID
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import Config
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import Annex.Direct
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import Annex.Content.Direct
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import Annex.Environment
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import Annex.Perms
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import Backend
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#ifndef mingw32_HOST_OS
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import Utility.UserInfo
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import Utility.FileMode
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#endif
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import Annex.Hook
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import Git.Hook (hookFile)
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import Upgrade
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import Annex.Content
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import Logs.Location
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import System.Log.Logger
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genDescription :: Maybe String -> Annex String
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genDescription (Just d) = return d
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genDescription Nothing = do
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reldir <- liftIO . relHome =<< fromRepo Git.repoPath
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hostname <- fromMaybe "" <$> liftIO getHostname
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#ifndef mingw32_HOST_OS
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let at = if null hostname then "" else "@"
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username <- liftIO myUserName
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return $ concat [username, at, hostname, ":", reldir]
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#else
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return $ concat [hostname, ":", reldir]
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#endif
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initialize :: Maybe String -> Annex ()
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initialize mdescription = do
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prepUUID
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initialize'
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u <- getUUID
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{- This will make the first commit to git, so ensure git is set up
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- properly to allow commits when running it. -}
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ensureCommit $ do
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Annex.Branch.create
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describeUUID u =<< genDescription mdescription
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initialize' :: Annex ()
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initialize' = do
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checkFifoSupport
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checkCrippledFileSystem
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unlessM isBare $
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hookWrite preCommitHook
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setVersion supportedVersion
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ifM (crippledFileSystem <&&> not <$> isBare)
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( do
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enableDirectMode
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setDirect True
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-- Handle case where this repo was cloned from a
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-- direct mode repo
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, unlessM isBare
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switchHEADBack
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)
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createInodeSentinalFile
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uninitialize :: Annex ()
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uninitialize = do
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hookUnWrite preCommitHook
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removeRepoUUID
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removeVersion
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{- Will automatically initialize if there is already a git-annex
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- branch from somewhere. Otherwise, require a manual init
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- to avoid git-annex accidentially being run in git
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- repos that did not intend to use it.
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-
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- Checks repository version and handles upgrades too.
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-}
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ensureInitialized :: Annex ()
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ensureInitialized = do
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getVersion >>= maybe needsinit checkUpgrade
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fixBadBare
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where
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needsinit = ifM Annex.Branch.hasSibling
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( initialize Nothing
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, error "First run: git-annex init"
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)
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{- Checks if a repository is initialized. Does not check version for ugrade. -}
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isInitialized :: Annex Bool
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isInitialized = maybe Annex.Branch.hasSibling (const $ return True) =<< getVersion
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isBare :: Annex Bool
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isBare = fromRepo Git.repoIsLocalBare
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{- A crippled filesystem is one that does not allow making symlinks,
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- or removing write access from files. -}
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probeCrippledFileSystem :: Annex Bool
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probeCrippledFileSystem = do
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#ifdef mingw32_HOST_OS
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return True
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#else
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tmp <- fromRepo gitAnnexTmpMiscDir
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let f = tmp </> "gaprobe"
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createAnnexDirectory tmp
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liftIO $ writeFile f ""
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uncrippled <- liftIO $ probe f
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liftIO $ removeFile f
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return $ not uncrippled
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where
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probe f = catchBoolIO $ do
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let f2 = f ++ "2"
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nukeFile f2
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createSymbolicLink f f2
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nukeFile f2
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preventWrite f
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allowWrite f
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return True
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#endif
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checkCrippledFileSystem :: Annex ()
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checkCrippledFileSystem = whenM probeCrippledFileSystem $ do
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warning "Detected a crippled filesystem."
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setCrippledFileSystem True
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{- Normally git disables core.symlinks itself when the
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- filesystem does not support them, but in Cygwin, git
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- does support symlinks, while git-annex, not linking
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- with Cygwin, does not. -}
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whenM (coreSymlinks <$> Annex.getGitConfig) $ do
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warning "Disabling core.symlinks."
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setConfig (ConfigKey "core.symlinks")
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(Git.Config.boolConfig False)
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probeFifoSupport :: Annex Bool
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probeFifoSupport = do
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#ifdef mingw32_HOST_OS
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return False
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#else
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tmp <- fromRepo gitAnnexTmpMiscDir
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let f = tmp </> "gaprobe"
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createAnnexDirectory tmp
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liftIO $ do
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nukeFile f
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ms <- tryIO $ do
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createNamedPipe f ownerReadMode
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getFileStatus f
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nukeFile f
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return $ either (const False) isNamedPipe ms
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#endif
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checkFifoSupport :: Annex ()
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checkFifoSupport = unlessM probeFifoSupport $ do
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warning "Detected a filesystem without fifo support."
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warning "Disabling ssh connection caching."
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setConfig (annexConfig "sshcaching") (Git.Config.boolConfig False)
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enableDirectMode :: Annex ()
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enableDirectMode = unlessM isDirect $ do
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warning "Enabling direct mode."
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top <- fromRepo Git.repoPath
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(l, clean) <- inRepo $ Git.LsFiles.inRepo [top]
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forM_ l $ \f ->
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maybe noop (`toDirect` f) =<< isAnnexLink f
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void $ liftIO clean
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{- Work around for git-annex version 5.20131118 - 5.20131127, which
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- had a bug that unset core.bare when initializing a bare repository.
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-
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- This resulted in objects sent to the repository being stored in
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- repo/.git/annex/objects, so move them to repo/annex/objects.
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-
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- This check slows down every git-annex run somewhat (by one file stat),
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- so should be removed after a suitable period of time has passed.
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- Since the bare repository may be on an offline USB drive, best to
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- keep it for a while. However, git-annex was only buggy for a few
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- weeks, so not too long.
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-}
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fixBadBare :: Annex ()
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fixBadBare = whenM checkBadBare $ do
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ks <- getKeysPresent InAnnex
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liftIO $ debugM "Init" $ unwords
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[ "Detected bad bare repository with"
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, show (length ks)
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, "objects; fixing"
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]
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g <- Annex.gitRepo
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gc <- Annex.getGitConfig
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d <- Git.repoPath <$> Annex.gitRepo
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void $ liftIO $ boolSystem "git"
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[ Param $ "--git-dir=" ++ d
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, Param "config"
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, Param Git.Config.coreBare
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, Param $ Git.Config.boolConfig True
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]
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g' <- liftIO $ Git.Construct.fromPath d
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s' <- liftIO $ Annex.new $ g' { Git.location = Git.Local { Git.gitdir = d, Git.worktree = Nothing } }
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Annex.changeState $ \s -> s
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{ Annex.repo = Annex.repo s'
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, Annex.gitconfig = Annex.gitconfig s'
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}
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forM_ ks $ \k -> do
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oldloc <- liftIO $ gitAnnexLocation k g gc
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thawContentDir oldloc
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moveAnnex k oldloc
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logStatus k InfoPresent
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let dotgit = d </> ".git"
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liftIO $ removeDirectoryRecursive dotgit
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`catchIO` const (renameDirectory dotgit (d </> "removeme"))
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{- A repostory with the problem won't know it's a bare repository, but will
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- have no pre-commit hook (which is not set up in a bare repository),
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- and will not have a HEAD file in its .git directory. -}
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checkBadBare :: Annex Bool
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checkBadBare = allM (not <$>)
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[isBare, hasPreCommitHook, hasDotGitHEAD]
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where
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hasPreCommitHook = inRepo $ doesFileExist . hookFile preCommitHook
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hasDotGitHEAD = inRepo $ \r -> doesFileExist $ Git.localGitDir r </> "HEAD"
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