415 lines
13 KiB
Haskell
415 lines
13 KiB
Haskell
{- git-annex repository initialization
|
|
-
|
|
- Copyright 2011-2021 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
{-# LANGUAGE CPP #-}
|
|
{-# LANGUAGE OverloadedStrings #-}
|
|
|
|
module Annex.Init (
|
|
ensureInitialized,
|
|
autoInitialize,
|
|
isInitialized,
|
|
initialize,
|
|
initialize',
|
|
uninitialize,
|
|
probeCrippledFileSystem,
|
|
probeCrippledFileSystem',
|
|
) where
|
|
|
|
import Annex.Common
|
|
import qualified Annex
|
|
import qualified Git
|
|
import qualified Git.Config
|
|
import qualified Git.Objects
|
|
import Git.Types (fromConfigValue)
|
|
import Git.ConfigTypes (SharedRepository(..))
|
|
import qualified Annex.Branch
|
|
import Logs.UUID
|
|
import Logs.Trust.Basic
|
|
import Logs.Config
|
|
import Types.TrustLevel
|
|
import Types.RepoVersion
|
|
import Annex.Version
|
|
import Annex.Difference
|
|
import Annex.UUID
|
|
import Annex.WorkTree
|
|
import Annex.Fixup
|
|
import Annex.Path
|
|
import Config
|
|
import Config.Files
|
|
import Config.Smudge
|
|
import qualified Upgrade.V5.Direct as Direct
|
|
import qualified Annex.AdjustedBranch as AdjustedBranch
|
|
import Remote.List.Util (remotesChanged)
|
|
import Annex.Environment
|
|
import Annex.Hook
|
|
import Annex.InodeSentinal
|
|
import Upgrade
|
|
import Annex.Tmp
|
|
import Utility.UserInfo
|
|
import qualified Utility.RawFilePath as R
|
|
import Utility.ThreadScheduler
|
|
import Annex.Perms
|
|
#ifndef mingw32_HOST_OS
|
|
import Utility.FileMode
|
|
import System.Posix.User
|
|
import qualified Utility.LockFile.Posix as Posix
|
|
#endif
|
|
|
|
import qualified Data.Map as M
|
|
import Control.Monad.IO.Class (MonadIO)
|
|
#ifndef mingw32_HOST_OS
|
|
import Data.Either
|
|
import qualified System.FilePath.ByteString as P
|
|
import Control.Concurrent.Async
|
|
#endif
|
|
|
|
checkInitializeAllowed :: Annex a -> Annex a
|
|
checkInitializeAllowed a = noAnnexFileContent' >>= \case
|
|
Nothing -> a
|
|
Just noannexmsg -> do
|
|
warning "Initialization prevented by .noannex file (remove the file to override)"
|
|
unless (null noannexmsg) $
|
|
warning noannexmsg
|
|
giveup "Not initialized."
|
|
|
|
initializeAllowed :: Annex Bool
|
|
initializeAllowed = isNothing <$> noAnnexFileContent'
|
|
|
|
noAnnexFileContent' :: Annex (Maybe String)
|
|
noAnnexFileContent' = inRepo $
|
|
noAnnexFileContent . fmap fromRawFilePath . Git.repoWorkTree
|
|
|
|
genDescription :: Maybe String -> Annex UUIDDesc
|
|
genDescription (Just d) = return $ UUIDDesc $ encodeBS d
|
|
genDescription Nothing = do
|
|
reldir <- liftIO . relHome . fromRawFilePath
|
|
=<< liftIO . absPath
|
|
=<< fromRepo Git.repoPath
|
|
hostname <- fromMaybe "" <$> liftIO getHostname
|
|
let at = if null hostname then "" else "@"
|
|
v <- liftIO myUserName
|
|
return $ UUIDDesc $ encodeBS $ concat $ case v of
|
|
Right username -> [username, at, hostname, ":", reldir]
|
|
Left _ -> [hostname, ":", reldir]
|
|
|
|
initialize :: Bool -> Maybe String -> Maybe RepoVersion -> Annex ()
|
|
initialize autoinit mdescription mversion = checkInitializeAllowed $ do
|
|
{- Has to come before any commits are made as the shared
|
|
- clone heuristic expects no local objects. -}
|
|
sharedclone <- checkSharedClone
|
|
|
|
{- 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' autoinit mversion
|
|
|
|
initSharedClone sharedclone
|
|
|
|
u <- getUUID
|
|
{- Avoid overwriting existing description with a default
|
|
- description. -}
|
|
whenM (pure (isJust mdescription) <||> not . M.member u <$> uuidDescMapRaw) $
|
|
describeUUID u =<< genDescription mdescription
|
|
|
|
-- Everything except for uuid setup, shared clone setup, and initial
|
|
-- description.
|
|
initialize' :: Bool -> Maybe RepoVersion -> Annex ()
|
|
initialize' autoinit mversion = checkInitializeAllowed $ do
|
|
checkLockSupport
|
|
checkFifoSupport
|
|
checkCrippledFileSystem
|
|
unlessM isBareRepo $ do
|
|
hookWrite preCommitHook
|
|
hookWrite postReceiveHook
|
|
setDifferences
|
|
unlessM (isJust <$> getVersion) $
|
|
setVersion (fromMaybe defaultVersion mversion)
|
|
supportunlocked <- annexSupportUnlocked <$> Annex.getGitConfig
|
|
if supportunlocked
|
|
then configureSmudgeFilter
|
|
else deconfigureSmudgeFilter
|
|
unlessM isBareRepo $ do
|
|
hookWrite postCheckoutHook
|
|
hookWrite postMergeHook
|
|
unless autoinit $
|
|
scanAnnexedFiles
|
|
|
|
AdjustedBranch.checkAdjustedClone >>= \case
|
|
AdjustedBranch.InAdjustedClone -> return ()
|
|
AdjustedBranch.NotInAdjustedClone ->
|
|
ifM (crippledFileSystem <&&> (not <$> isBareRepo))
|
|
( AdjustedBranch.adjustToCrippledFileSystem
|
|
-- Handle case where this repo was cloned from a
|
|
-- direct mode repo
|
|
, unlessM isBareRepo
|
|
Direct.switchHEADBack
|
|
)
|
|
propigateSecureHashesOnly
|
|
createInodeSentinalFile False
|
|
fixupUnusualReposAfterInit
|
|
|
|
uninitialize :: Annex ()
|
|
uninitialize = do
|
|
-- Remove hooks that are written when initializing.
|
|
hookUnWrite preCommitHook
|
|
hookUnWrite postReceiveHook
|
|
hookUnWrite postCheckoutHook
|
|
hookUnWrite postMergeHook
|
|
deconfigureSmudgeFilter
|
|
removeRepoUUID
|
|
removeVersion
|
|
|
|
{- Gets the version that the repo is initialized with.
|
|
-
|
|
- To make sure the repo is fully initialized, also checks that it has a
|
|
- uuid configured. In the unusual case where one is set and the other is
|
|
- not, errors out to avoid running in an inconsistent state.
|
|
-}
|
|
getInitializedVersion :: Annex (Maybe RepoVersion)
|
|
getInitializedVersion = do
|
|
um <- (\u -> if u == NoUUID then Nothing else Just u) <$> getUUID
|
|
vm <- getVersion
|
|
case (um, vm) of
|
|
(Just _, Just v) -> return (Just v)
|
|
(Nothing, Nothing) -> return Nothing
|
|
(Just _, Nothing) -> onemissing "annex.version" "annex.uuid"
|
|
(Nothing, Just _) -> onemissing "annex.uuid" "annex.version"
|
|
where
|
|
onemissing missing have = giveup $ unwords
|
|
[ "This repository has " ++ have ++ " set,"
|
|
, "but " ++ missing ++ " is not set. Perhaps that"
|
|
, "git config was lost. Cannot use the repository"
|
|
, "in this state; set back " ++ missing ++ " to fix this."
|
|
]
|
|
|
|
{- Will automatically initialize if there is already a git-annex
|
|
- branch from somewhere. Otherwise, require a manual init
|
|
- to avoid git-annex accidentally being run in git
|
|
- repos that did not intend to use it.
|
|
-
|
|
- Checks repository version and handles upgrades too.
|
|
-}
|
|
ensureInitialized :: Annex ()
|
|
ensureInitialized = getInitializedVersion >>= maybe needsinit checkUpgrade
|
|
where
|
|
needsinit = ifM autoInitializeAllowed
|
|
( do
|
|
initialize True Nothing Nothing
|
|
autoEnableSpecialRemotes
|
|
, giveup "First run: git-annex init"
|
|
)
|
|
|
|
{- Check if auto-initialize is allowed. -}
|
|
autoInitializeAllowed :: Annex Bool
|
|
autoInitializeAllowed = Annex.Branch.hasSibling <&&> objectDirNotPresent
|
|
|
|
objectDirNotPresent :: Annex Bool
|
|
objectDirNotPresent = do
|
|
d <- fromRawFilePath <$> fromRepo gitAnnexObjectDir
|
|
exists <- liftIO $ doesDirectoryExist d
|
|
when exists $
|
|
giveup $ unwords $
|
|
[ "This repository is not initialized for use"
|
|
, "by git-annex, but " ++ d ++ " exists,"
|
|
, "which indicates this repository was used by"
|
|
, "git-annex before, and may have lost its"
|
|
, "annex.uuid and annex.version configs. Either"
|
|
, "set back missing configs, or run git-annex init"
|
|
, "to initialize with a new uuid."
|
|
]
|
|
return (not exists)
|
|
|
|
{- Initialize if it can do so automatically. Avoids failing if it cannot.
|
|
-
|
|
- Checks repository version and handles upgrades too.
|
|
-}
|
|
autoInitialize :: Annex ()
|
|
autoInitialize = getInitializedVersion >>= maybe needsinit checkUpgrade
|
|
where
|
|
needsinit =
|
|
whenM (initializeAllowed <&&> autoInitializeAllowed) $ do
|
|
initialize True Nothing Nothing
|
|
autoEnableSpecialRemotes
|
|
|
|
{- Checks if a repository is initialized. Does not check version for ugrade. -}
|
|
isInitialized :: Annex Bool
|
|
isInitialized = maybe Annex.Branch.hasSibling (const $ return True) =<< getVersion
|
|
|
|
{- A crippled filesystem is one that does not allow making symlinks,
|
|
- or removing write access from files. -}
|
|
probeCrippledFileSystem :: Annex Bool
|
|
probeCrippledFileSystem = withEventuallyCleanedOtherTmp $ \tmp -> do
|
|
(r, warnings) <- probeCrippledFileSystem' tmp
|
|
(Just (freezeContent' UnShared))
|
|
(Just (thawContent' UnShared))
|
|
mapM_ warning warnings
|
|
return r
|
|
|
|
probeCrippledFileSystem'
|
|
:: (MonadIO m, MonadCatch m)
|
|
=> RawFilePath
|
|
-> Maybe (RawFilePath -> m ())
|
|
-> Maybe (RawFilePath -> m ())
|
|
-> m (Bool, [String])
|
|
#ifdef mingw32_HOST_OS
|
|
probeCrippledFileSystem' _ _ _ = return (True, [])
|
|
#else
|
|
probeCrippledFileSystem' tmp freezecontent thawcontent = do
|
|
let f = tmp P.</> "gaprobe"
|
|
let f' = fromRawFilePath f
|
|
liftIO $ writeFile f' ""
|
|
r <- probe f'
|
|
void $ tryNonAsync $ (fromMaybe (liftIO . allowWrite) thawcontent) f
|
|
liftIO $ removeFile f'
|
|
return r
|
|
where
|
|
probe f = catchDefaultIO (True, []) $ do
|
|
let f2 = f ++ "2"
|
|
liftIO $ removeWhenExistsWith R.removeLink (toRawFilePath f2)
|
|
liftIO $ createSymbolicLink f f2
|
|
liftIO $ removeWhenExistsWith R.removeLink (toRawFilePath f2)
|
|
(fromMaybe (liftIO . preventWrite) freezecontent) (toRawFilePath f)
|
|
-- Should be unable to write to the file (unless
|
|
-- running as root). But some crippled
|
|
-- filesystems ignore write bit removals or ignore
|
|
-- permissions entirely.
|
|
ifM ((== Just False) <$> liftIO (checkContentWritePerm' UnShared (toRawFilePath f)))
|
|
( return (True, ["Filesystem does not allow removing write bit from files."])
|
|
, liftIO $ ifM ((== 0) <$> getRealUserID)
|
|
( return (False, [])
|
|
, do
|
|
r <- catchBoolIO $ do
|
|
writeFile f "2"
|
|
return True
|
|
if r
|
|
then return (True, ["Filesystem allows writing to files whose write bit is not set."])
|
|
else return (False, [])
|
|
)
|
|
)
|
|
#endif
|
|
|
|
checkCrippledFileSystem :: Annex ()
|
|
checkCrippledFileSystem = whenM probeCrippledFileSystem $ do
|
|
warning "Detected a crippled filesystem."
|
|
setCrippledFileSystem True
|
|
|
|
{- Normally git disables core.symlinks itself when the:w
|
|
-
|
|
- filesystem does not support them. But, even if symlinks are
|
|
- supported, we don't use them by default in a crippled
|
|
- filesystem. -}
|
|
whenM (coreSymlinks <$> Annex.getGitConfig) $ do
|
|
warning "Disabling core.symlinks."
|
|
setConfig "core.symlinks"
|
|
(Git.Config.boolConfig False)
|
|
|
|
probeLockSupport :: Annex Bool
|
|
#ifdef mingw32_HOST_OS
|
|
probeLockSupport = return True
|
|
#else
|
|
probeLockSupport = withEventuallyCleanedOtherTmp $ \tmp -> do
|
|
let f = tmp P.</> "lockprobe"
|
|
mode <- annexFileMode
|
|
annexrunner <- Annex.makeRunner
|
|
liftIO $ withAsync (warnstall annexrunner) (const (go f mode))
|
|
where
|
|
go f mode = do
|
|
removeWhenExistsWith R.removeLink f
|
|
let locktest = bracket
|
|
(Posix.lockExclusive (Just mode) f)
|
|
Posix.dropLock
|
|
(const noop)
|
|
ok <- isRight <$> tryNonAsync locktest
|
|
removeWhenExistsWith R.removeLink f
|
|
return ok
|
|
|
|
warnstall annexrunner = do
|
|
threadDelaySeconds (Seconds 10)
|
|
annexrunner $ do
|
|
warning "Probing the filesystem for POSIX fcntl lock support is taking a long time."
|
|
warning "(Setting annex.pidlock will avoid this probe.)"
|
|
#endif
|
|
|
|
probeFifoSupport :: Annex Bool
|
|
probeFifoSupport = do
|
|
#ifdef mingw32_HOST_OS
|
|
return False
|
|
#else
|
|
withEventuallyCleanedOtherTmp $ \tmp -> do
|
|
let f = tmp P.</> "gaprobe"
|
|
let f2 = tmp P.</> "gaprobe2"
|
|
liftIO $ do
|
|
removeWhenExistsWith R.removeLink f
|
|
removeWhenExistsWith R.removeLink f2
|
|
ms <- tryIO $ do
|
|
createNamedPipe (fromRawFilePath f) ownerReadMode
|
|
R.createLink f f2
|
|
R.getFileStatus f
|
|
removeWhenExistsWith R.removeLink f
|
|
removeWhenExistsWith R.removeLink f2
|
|
return $ either (const False) isNamedPipe ms
|
|
#endif
|
|
|
|
checkLockSupport :: Annex ()
|
|
checkLockSupport =
|
|
unlessM (annexPidLock <$> Annex.getGitConfig) $
|
|
unlessM probeLockSupport $ do
|
|
warning "Detected a filesystem without POSIX fcntl lock support."
|
|
warning "Enabling annex.pidlock."
|
|
setConfig (annexConfig "pidlock") (Git.Config.boolConfig True)
|
|
|
|
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)
|
|
|
|
checkSharedClone :: Annex Bool
|
|
checkSharedClone = inRepo Git.Objects.isSharedClone
|
|
|
|
initSharedClone :: Bool -> Annex ()
|
|
initSharedClone False = return ()
|
|
initSharedClone True = do
|
|
showLongNote "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)
|
|
|
|
{- Propigate annex.securehashesonly from then global config to local
|
|
- config. This makes a clone inherit a parent's setting, but once
|
|
- a repository has a local setting, changes to the global config won't
|
|
- affect it. -}
|
|
propigateSecureHashesOnly :: Annex ()
|
|
propigateSecureHashesOnly =
|
|
maybe noop (setConfig "annex.securehashesonly" . fromConfigValue)
|
|
=<< getGlobalConfig "annex.securehashesonly"
|
|
|
|
fixupUnusualReposAfterInit :: Annex ()
|
|
fixupUnusualReposAfterInit = do
|
|
gc <- Annex.getGitConfig
|
|
void $ inRepo $ \r -> fixupUnusualRepos r gc
|
|
|
|
{- Try to enable any special remotes that are configured to do so.
|
|
-
|
|
- The enabling is done in a child process to avoid it using stdio.
|
|
-}
|
|
autoEnableSpecialRemotes :: Annex ()
|
|
autoEnableSpecialRemotes = do
|
|
rp <- fromRawFilePath <$> fromRepo Git.repoPath
|
|
withNullHandle $ \nullh -> gitAnnexChildProcess "init"
|
|
[ Param "--autoenable" ]
|
|
(\p -> p
|
|
{ std_out = UseHandle nullh
|
|
, std_err = UseHandle nullh
|
|
, std_in = UseHandle nullh
|
|
, cwd = Just rp
|
|
}
|
|
)
|
|
(\_ _ _ pid -> void $ waitForProcess pid)
|
|
remotesChanged
|