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|
{- git-annex repository initialization
-
- Copyright 2011 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Annex.Init (
ensureInitialized,
isInitialized,
initialize,
initialize',
uninitialize,
probeCrippledFileSystem,
) where
import Common.Annex
import qualified Annex
import qualified Git
import qualified Git.LsFiles
import qualified Git.Config
import qualified Git.Objects
import qualified Annex.Branch
import Logs.UUID
import Logs.Trust.Basic
import Types.TrustLevel
import Annex.Version
import Annex.Difference
import Annex.UUID
import Config
import Annex.Direct
import Annex.Content.Direct
import Annex.Environment
import Backend
import Annex.Hook
import Upgrade
#ifndef mingw32_HOST_OS
import Utility.UserInfo
import Utility.FileMode
import Annex.Perms
#endif
genDescription :: Maybe String -> Annex String
genDescription (Just d) = return d
genDescription Nothing = do
reldir <- liftIO . relHome =<< liftIO . absPath =<< fromRepo Git.repoPath
hostname <- fromMaybe "" <$> liftIO getHostname
#ifndef mingw32_HOST_OS
let at = if null hostname then "" else "@"
username <- liftIO myUserName
return $ concat [username, at, hostname, ":", reldir]
#else
return $ concat [hostname, ":", reldir]
#endif
initialize :: Maybe String -> Annex ()
initialize mdescription = do
{- This will make the first commit to git, so ensure git is set up
- properly to allow commits when running it. -}
ensureCommit $ Annex.Branch.create
prepUUID
initialize'
u <- getUUID
describeUUID u =<< genDescription mdescription
-- Everything except for uuid setup.
initialize' :: Annex ()
initialize' = do
checkFifoSupport
checkCrippledFileSystem
unlessM isBare $
hookWrite preCommitHook
setDifferences
setVersion supportedVersion
ifM (crippledFileSystem <&&> not <$> isBare)
( do
enableDirectMode
setDirect True
-- Handle case where this repo was cloned from a
-- direct mode repo
, unlessM isBare
switchHEADBack
)
createInodeSentinalFile
checkSharedClone
uninitialize :: Annex ()
uninitialize = do
hookUnWrite preCommitHook
removeRepoUUID
removeVersion
{- Will automatically initialize if there is already a git-annex
- branch from somewhere. Otherwise, require a manual init
- to avoid git-annex accidentially being run in git
- repos that did not intend to use it.
-
- Checks repository version and handles upgrades too.
-}
ensureInitialized :: Annex ()
ensureInitialized = getVersion >>= maybe needsinit checkUpgrade
where
needsinit = ifM Annex.Branch.hasSibling
( initialize Nothing
, error "First run: git-annex init"
)
{- Checks if a repository is initialized. Does not check version for ugrade. -}
isInitialized :: Annex Bool
isInitialized = maybe Annex.Branch.hasSibling (const $ return True) =<< getVersion
isBare :: Annex Bool
isBare = fromRepo Git.repoIsLocalBare
{- A crippled filesystem is one that does not allow making symlinks,
- or removing write access from files. -}
probeCrippledFileSystem :: Annex Bool
probeCrippledFileSystem = do
#ifdef mingw32_HOST_OS
return True
#else
tmp <- fromRepo gitAnnexTmpMiscDir
let f = tmp </> "gaprobe"
createAnnexDirectory tmp
liftIO $ writeFile f ""
uncrippled <- liftIO $ probe f
void $ liftIO $ tryIO $ allowWrite f
liftIO $ removeFile f
return $ not uncrippled
where
probe f = catchBoolIO $ do
let f2 = f ++ "2"
nukeFile f2
createSymbolicLink f f2
nukeFile f2
preventWrite f
-- Should be unable to write to the file, but some crippled
-- filesystems ignore write bit removals.
not <$> catchBoolIO (writeFile f "2" >> return True)
#endif
checkCrippledFileSystem :: Annex ()
checkCrippledFileSystem = whenM probeCrippledFileSystem $ do
warning "Detected a crippled filesystem."
setCrippledFileSystem True
{- Normally git disables core.symlinks itself when the
- filesystem does not support them, but in Cygwin, git
- does support symlinks, while git-annex, not linking
- with Cygwin, does not. -}
whenM (coreSymlinks <$> Annex.getGitConfig) $ do
warning "Disabling core.symlinks."
setConfig (ConfigKey "core.symlinks")
(Git.Config.boolConfig False)
probeFifoSupport :: Annex Bool
probeFifoSupport = do
#ifdef mingw32_HOST_OS
return False
#else
tmp <- fromRepo gitAnnexTmpMiscDir
let f = tmp </> "gaprobe"
let f2 = tmp </> "gaprobe2"
createAnnexDirectory tmp
liftIO $ do
nukeFile f
nukeFile f2
ms <- tryIO $ do
createNamedPipe f ownerReadMode
createLink f f2
getFileStatus f
nukeFile f
nukeFile f2
return $ either (const False) isNamedPipe ms
#endif
checkFifoSupport :: Annex ()
checkFifoSupport = unlessM probeFifoSupport $ do
warning "Detected a filesystem without fifo support."
warning "Disabling ssh connection caching."
setConfig (annexConfig "sshcaching") (Git.Config.boolConfig False)
enableDirectMode :: Annex ()
enableDirectMode = unlessM isDirect $ do
warning "Enabling direct mode."
top <- fromRepo Git.repoPath
(l, clean) <- inRepo $ Git.LsFiles.inRepo [top]
forM_ l $ \f ->
maybe noop (`toDirect` f) =<< isAnnexLink f
void $ liftIO clean
checkSharedClone :: Annex ()
checkSharedClone = whenM (inRepo Git.Objects.isSharedClone) $ do
showSideAction "Repository was cloned with --shared; setting annex.hardlink=true and making repository untrusted."
u <- getUUID
trustSet u UnTrusted
setConfig (annexConfig "hardlink") (Git.Config.boolConfig True)
|
