164 lines
4.3 KiB
Haskell
164 lines
4.3 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 Init (
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ensureInitialized,
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isInitialized,
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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 Utility.Network
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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 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 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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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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setVersion defaultVersion
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checkCrippledFileSystem
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checkFifoSupport
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unlessBare $
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hookWrite preCommitHook
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createInodeSentinalFile
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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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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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ensureInitialized :: Annex ()
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ensureInitialized = getVersion >>= maybe needsinit checkVersion
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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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unlessBare :: Annex () -> Annex ()
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unlessBare = unlessM $ 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 gitAnnexTmpDir
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let f = tmp </> "gaprobe"
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liftIO $ do
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createDirectoryIfMissing True tmp
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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 filesystem does
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- not support them, but in Cygwin, git does support symlinks, while
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- git-annex, not linking 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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unlessBare $ do
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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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setDirect True
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setVersion directModeVersion
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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 gitAnnexTmpDir
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let f = tmp </> "gaprobe"
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liftIO $ do
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createDirectoryIfMissing True tmp
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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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