d930a2035c
This means it will still be a .git file when git-annex init runs. That's ok, the repo probably contains no annexed objects yet, and even if it does, git-annex init does not care if symlinks in the worktree don't point to the objects. I made init, at the end, run the conversion code. Not really necessary because the next git-annex command could do it just as well. But, this avoids commands that don't normally write to the repo needing to write to it, which might avoid some problem or other, and seems worth avoiding generally.
289 lines
8.3 KiB
Haskell
289 lines
8.3 KiB
Haskell
{- git-annex repository initialization
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-
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- Copyright 2011-2019 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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{-# LANGUAGE CPP #-}
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{-# LANGUAGE OverloadedStrings #-}
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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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probeCrippledFileSystem',
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) where
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import Annex.Common
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import qualified Annex
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import qualified Git
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import qualified Git.Config
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import qualified Git.Objects
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import Git.Types (fromConfigValue)
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import qualified Annex.Branch
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import Logs.UUID
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import Logs.Trust.Basic
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import Logs.Config
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import Types.TrustLevel
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import Types.RepoVersion
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import Annex.Version
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import Annex.Difference
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import Annex.UUID
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import Annex.WorkTree
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import Annex.Fixup
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import Config
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import Config.Files
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import Config.Smudge
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import qualified Upgrade.V5.Direct as Direct
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import qualified Annex.AdjustedBranch as AdjustedBranch
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import Annex.Environment
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import Annex.Hook
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import Annex.InodeSentinal
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import Upgrade
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import Annex.Tmp
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import Utility.UserInfo
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#ifndef mingw32_HOST_OS
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import Annex.Perms
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import Utility.FileMode
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import System.Posix.User
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import qualified Utility.LockFile.Posix as Posix
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import Data.Either
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#endif
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import qualified Data.Map as M
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checkCanInitialize :: Annex a -> Annex a
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checkCanInitialize a = inRepo (noAnnexFileContent . fmap fromRawFilePath . Git.repoWorkTree) >>= \case
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Nothing -> a
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Just noannexmsg -> do
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warning "Initialization prevented by .noannex file (remove the file to override)"
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unless (null noannexmsg) $
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warning noannexmsg
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giveup "Not initialized."
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genDescription :: Maybe String -> Annex UUIDDesc
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genDescription (Just d) = return $ UUIDDesc $ encodeBS d
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genDescription Nothing = do
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reldir <- liftIO . relHome
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=<< liftIO . absPath . fromRawFilePath
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=<< fromRepo Git.repoPath
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hostname <- fromMaybe "" <$> liftIO getHostname
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let at = if null hostname then "" else "@"
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v <- liftIO myUserName
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return $ UUIDDesc $ encodeBS $ concat $ case v of
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Right username -> [username, at, hostname, ":", reldir]
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Left _ -> [hostname, ":", reldir]
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initialize :: Maybe String -> Maybe RepoVersion -> Annex ()
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initialize mdescription mversion = checkCanInitialize $ do
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{- Has to come before any commits are made as the shared
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- clone heuristic expects no local objects. -}
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sharedclone <- checkSharedClone
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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 $ Annex.Branch.create
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prepUUID
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initialize' mversion
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initSharedClone sharedclone
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u <- getUUID
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{- Avoid overwriting existing description with a default
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- description. -}
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whenM (pure (isJust mdescription) <||> not . M.member u <$> uuidDescMapRaw) $
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describeUUID u =<< genDescription mdescription
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-- Everything except for uuid setup, shared clone setup, and initial
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-- description.
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initialize' :: Maybe RepoVersion -> Annex ()
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initialize' mversion = checkCanInitialize $ do
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checkLockSupport
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checkFifoSupport
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checkCrippledFileSystem
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unlessM isBareRepo $ do
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hookWrite preCommitHook
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hookWrite postReceiveHook
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setDifferences
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unlessM (isJust <$> getVersion) $
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setVersion (fromMaybe defaultVersion mversion)
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configureSmudgeFilter
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unlessM isBareRepo $ do
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showSideAction "scanning for unlocked files"
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scanUnlockedFiles
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hookWrite postCheckoutHook
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hookWrite postMergeHook
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AdjustedBranch.checkAdjustedClone >>= \case
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AdjustedBranch.InAdjustedClone -> return ()
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AdjustedBranch.NotInAdjustedClone ->
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ifM (crippledFileSystem <&&> (not <$> isBareRepo))
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( AdjustedBranch.adjustToCrippledFileSystem
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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 isBareRepo
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Direct.switchHEADBack
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)
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propigateSecureHashesOnly
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createInodeSentinalFile False
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fixupUnusualReposAfterInit
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uninitialize :: Annex ()
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uninitialize = do
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unHook
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deconfigureSmudgeFilter
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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 accidentally 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 = getVersion >>= maybe needsinit checkUpgrade
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where
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needsinit = ifM Annex.Branch.hasSibling
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( initialize Nothing Nothing
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, giveup $ "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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{- 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 = withEventuallyCleanedOtherTmp $ \tmp -> do
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(r, warnings) <- liftIO $ probeCrippledFileSystem' tmp
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mapM_ warning warnings
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return r
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probeCrippledFileSystem' :: FilePath -> IO (Bool, [String])
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#ifdef mingw32_HOST_OS
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probeCrippledFileSystem' _ = return (True, [])
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#else
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probeCrippledFileSystem' tmp = do
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let f = tmp </> "gaprobe"
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writeFile f ""
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r <- probe f
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void $ tryIO $ allowWrite f
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removeFile f
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return r
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where
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probe f = catchDefaultIO (True, []) $ 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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-- Should be unable to write to the file, unless
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-- running as root, but some crippled
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-- filesystems ignore write bit removals.
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ifM ((== 0) <$> getRealUserID)
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( return (False, [])
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, do
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r <- catchBoolIO $ do
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writeFile f "2"
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return True
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if r
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then return (True, ["Filesystem allows writing to files whose write bit is not set."])
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else return (False, [])
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)
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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, even if symlinks are
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- supported, we don't use them by default in a crippled
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- filesystem. -}
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whenM (coreSymlinks <$> Annex.getGitConfig) $ do
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warning "Disabling core.symlinks."
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setConfig "core.symlinks"
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(Git.Config.boolConfig False)
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probeLockSupport :: Annex Bool
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probeLockSupport = do
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#ifdef mingw32_HOST_OS
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return True
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#else
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withEventuallyCleanedOtherTmp $ \tmp -> do
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let f = tmp </> "lockprobe"
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mode <- annexFileMode
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liftIO $ do
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nukeFile f
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let locktest =
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Posix.lockExclusive (Just mode) f
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>>= Posix.dropLock
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ok <- isRight <$> tryNonAsync locktest
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nukeFile f
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return ok
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#endif
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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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withEventuallyCleanedOtherTmp $ \tmp -> do
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let f = tmp </> "gaprobe"
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let f2 = tmp </> "gaprobe2"
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liftIO $ do
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nukeFile f
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nukeFile f2
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ms <- tryIO $ do
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createNamedPipe f ownerReadMode
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createLink f f2
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getFileStatus f
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nukeFile f
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nukeFile f2
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return $ either (const False) isNamedPipe ms
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#endif
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checkLockSupport :: Annex ()
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checkLockSupport = unlessM probeLockSupport $ do
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warning "Detected a filesystem without POSIX fcntl lock support."
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warning "Enabling annex.pidlock."
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setConfig (annexConfig "pidlock") (Git.Config.boolConfig True)
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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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checkSharedClone :: Annex Bool
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checkSharedClone = inRepo Git.Objects.isSharedClone
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initSharedClone :: Bool -> Annex ()
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initSharedClone False = return ()
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initSharedClone True = do
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showLongNote "Repository was cloned with --shared; setting annex.hardlink=true and making repository untrusted."
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u <- getUUID
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trustSet u UnTrusted
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setConfig (annexConfig "hardlink") (Git.Config.boolConfig True)
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{- Propigate annex.securehashesonly from then global config to local
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- config. This makes a clone inherit a parent's setting, but once
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- a repository has a local setting, changes to the global config won't
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- affect it. -}
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propigateSecureHashesOnly :: Annex ()
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propigateSecureHashesOnly =
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maybe noop (setConfig "annex.securehashesonly" . fromConfigValue)
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=<< getGlobalConfig "annex.securehashesonly"
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fixupUnusualReposAfterInit :: Annex ()
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fixupUnusualReposAfterInit = do
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gc <- Annex.getGitConfig
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void $ inRepo $ \r -> fixupUnusualRepos r gc
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