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|
{- git-annex repository initialization
-
- Copyright 2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Init (
ensureInitialized,
isInitialized,
initialize,
uninitialize,
probeCrippledFileSystem
) where
import Common.Annex
import Utility.TempFile
import Utility.Network
import qualified Git
import qualified Git.LsFiles
import qualified Git.Config
import qualified Annex.Branch
import Logs.UUID
import Annex.Version
import Annex.UUID
import Utility.UserInfo
import Utility.Shell
import Utility.FileMode
import Config
import Annex.Direct
import Annex.Content.Direct
import Backend
genDescription :: Maybe String -> Annex String
genDescription (Just d) = return d
genDescription Nothing = do
hostname <- fromMaybe "" <$> liftIO getHostname
let at = if null hostname then "" else "@"
username <- liftIO myUserName
reldir <- liftIO . relHome =<< fromRepo Git.repoPath
return $ concat [username, at, hostname, ":", reldir]
initialize :: Maybe String -> Annex ()
initialize mdescription = do
prepUUID
setVersion defaultVersion
checkCrippledFileSystem
checkFifoSupport
Annex.Branch.create
gitPreCommitHookWrite
createInodeSentinalFile
u <- getUUID
describeUUID u =<< genDescription mdescription
uninitialize :: Annex ()
uninitialize = do
gitPreCommitHookUnWrite
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. -}
ensureInitialized :: Annex ()
ensureInitialized = getVersion >>= maybe needsinit checkVersion
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
{- set up a git pre-commit hook, if one is not already present -}
gitPreCommitHookWrite :: Annex ()
gitPreCommitHookWrite = unlessBare $ do
hook <- preCommitHook
ifM (liftIO $ doesFileExist hook)
( warning $ "pre-commit hook (" ++ hook ++ ") already exists, not configuring"
, unlessM crippledFileSystem $
liftIO $ do
viaTmp writeFile hook preCommitScript
p <- getPermissions hook
setPermissions hook $ p {executable = True}
)
gitPreCommitHookUnWrite :: Annex ()
gitPreCommitHookUnWrite = unlessBare $ do
hook <- preCommitHook
whenM (liftIO $ doesFileExist hook) $
ifM (liftIO $ (==) preCommitScript <$> readFile hook)
( liftIO $ removeFile hook
, warning $ "pre-commit hook (" ++ hook ++
") contents modified; not deleting." ++
" Edit it to remove call to git annex."
)
unlessBare :: Annex () -> Annex ()
unlessBare = unlessM $ fromRepo Git.repoIsLocalBare
preCommitHook :: Annex FilePath
preCommitHook = (</>) <$> fromRepo Git.localGitDir <*> pure "hooks/pre-commit"
preCommitScript :: String
preCommitScript = unlines
[ shebang
, "# automatically configured by git-annex"
, "git annex pre-commit ."
]
probeCrippledFileSystem :: Annex Bool
probeCrippledFileSystem = do
tmp <- fromRepo gitAnnexTmpDir
let f = tmp </> "gaprobe"
liftIO $ do
createDirectoryIfMissing True tmp
writeFile f ""
uncrippled <- liftIO $ probe f
liftIO $ removeFile f
return $ not uncrippled
where
probe f = catchBoolIO $ do
let f2 = f ++ "2"
nukeFile f2
createLink f f2
nukeFile f2
createSymbolicLink f f2
nukeFile f2
preventWrite f
allowWrite f
return True
checkCrippledFileSystem :: Annex ()
checkCrippledFileSystem = whenM probeCrippledFileSystem $ do
warning "Detected a crippled filesystem."
setCrippledFileSystem True
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
setDirect True
setVersion directModeVersion
probeFifoSupport :: Annex Bool
probeFifoSupport = do
tmp <- fromRepo gitAnnexTmpDir
let f = tmp </> "gaprobe"
liftIO $ do
createDirectoryIfMissing True tmp
nukeFile f
ms <- tryIO $ do
createNamedPipe f ownerReadMode
getFileStatus f
nukeFile f
return $ either (const False) isNamedPipe ms
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)
|
