2a45b5ae9a
This was already prevented in other ways, but as seen in commit
c30fd24d91, those were a bit fragile.
And I'm not sure races were avoided in every case before. At least a
race between two separate git-annex processes, dropping the same
content, seemed possible.
This way, if locking fails, and the content is not present, it will
always do the right thing. Also, it avoids the overhead of an unncessary
inAnnex check for every file.
This commit was sponsored by Denis Dzyubenko on Patreon.
942 lines
32 KiB
Haskell
942 lines
32 KiB
Haskell
{- Standard git remotes.
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-
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- Copyright 2011-2020 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 Remote.Git (
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remote,
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configRead,
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repoAvail,
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onLocalRepo,
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) where
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import Annex.Common
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import Annex.Ssh
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import Types.Remote
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import Types.GitConfig
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import qualified Git
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import qualified Git.Config
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import qualified Git.Construct
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import qualified Git.Command
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import qualified Git.GCrypt
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import qualified Git.Types as Git
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import qualified Annex
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import Logs.Presence
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import Annex.Transfer
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import Annex.UUID
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import qualified Annex.Content
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import qualified Annex.BranchState
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import qualified Annex.Branch
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import qualified Annex.Url as Url
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import qualified Annex.SpecialRemote.Config as SpecialRemote
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import Utility.Tmp
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import Config
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import Config.Cost
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import Annex.SpecialRemote.Config
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import Config.DynamicConfig
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import Annex.Init
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import Types.CleanupActions
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import qualified CmdLine.GitAnnexShell.Fields as Fields
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import Logs.Location
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import Utility.Metered
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import Utility.CopyFile
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import Utility.Env
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import Utility.Batch
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import Utility.SimpleProtocol
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import Remote.Helper.Git
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import Remote.Helper.Messages
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import Remote.Helper.ExportImport
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import qualified Remote.Helper.Ssh as Ssh
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import qualified Remote.GCrypt
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import qualified Remote.GitLFS
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import qualified Remote.P2P
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import qualified Remote.Helper.P2P as P2PHelper
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import P2P.Address
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import Annex.Path
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import Creds
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import Types.NumCopies
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import Types.ProposedAccepted
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import Annex.Action
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import Messages.Progress
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#ifndef mingw32_HOST_OS
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import qualified Utility.RawFilePath as R
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import Utility.FileMode
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#endif
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import Control.Concurrent
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import Control.Concurrent.MSampleVar
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import qualified Data.Map as M
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import qualified Data.ByteString as S
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import Network.URI
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remote :: RemoteType
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remote = RemoteType
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{ typename = "git"
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, enumerate = list
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, generate = gen
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, configParser = mkRemoteConfigParser
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[ optionalStringParser locationField
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(FieldDesc "url of git remote to remember with special remote")
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]
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, setup = gitSetup
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, exportSupported = exportUnsupported
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, importSupported = importUnsupported
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}
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locationField :: RemoteConfigField
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locationField = Accepted "location"
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list :: Bool -> Annex [Git.Repo]
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list autoinit = do
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c <- fromRepo Git.config
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rs <- mapM (tweakurl c) =<< Annex.getGitRemotes
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mapM (configRead autoinit) rs
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where
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annexurl r = remoteConfig r "annexurl"
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tweakurl c r = do
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let n = fromJust $ Git.remoteName r
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case M.lookup (annexurl r) c of
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Nothing -> return r
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Just url -> inRepo $ \g ->
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Git.Construct.remoteNamed n $
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Git.Construct.fromRemoteLocation (Git.fromConfigValue url) g
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{- Git remotes are normally set up using standard git command, not
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- git-annex initremote and enableremote.
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-
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- For initremote, the git remote must already be set up, and have a uuid.
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- Initremote simply remembers its location.
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-
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- enableremote simply sets up a git remote using the stored location.
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- No attempt is made to make the remote be accessible via ssh key setup,
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- etc.
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-}
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gitSetup :: SetupStage -> Maybe UUID -> Maybe CredPair -> RemoteConfig -> RemoteGitConfig -> Annex (RemoteConfig, UUID)
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gitSetup Init mu _ c _ = do
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let location = fromMaybe (giveup "Specify location=url") $
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Url.parseURIRelaxed . fromProposedAccepted
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=<< M.lookup locationField c
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rs <- Annex.getGitRemotes
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u <- case filter (\r -> Git.location r == Git.Url location) rs of
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[r] -> getRepoUUID r
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[] -> giveup "could not find existing git remote with specified location"
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_ -> giveup "found multiple git remotes with specified location"
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if isNothing mu || mu == Just u
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then return (c, u)
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else error "git remote did not have specified uuid"
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gitSetup (Enable _) (Just u) _ c _ = do
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inRepo $ Git.Command.run
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[ Param "remote"
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, Param "add"
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, Param $ fromMaybe (giveup "no name") (SpecialRemote.lookupName c)
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, Param $ maybe (giveup "no location") fromProposedAccepted (M.lookup locationField c)
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]
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return (c, u)
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gitSetup (Enable _) Nothing _ _ _ = error "unable to enable git remote with no specified uuid"
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{- It's assumed to be cheap to read the config of non-URL remotes, so this is
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- done each time git-annex is run in a way that uses remotes, unless
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- annex-checkuuid is false.
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-
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- Conversely, the config of an URL remote is only read when there is no
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- cached UUID value. -}
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configRead :: Bool -> Git.Repo -> Annex Git.Repo
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configRead autoinit r = do
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gc <- Annex.getRemoteGitConfig r
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hasuuid <- (/= NoUUID) <$> getRepoUUID r
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annexignore <- liftIO $ getDynamicConfig (remoteAnnexIgnore gc)
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case (repoCheap r, annexignore, hasuuid) of
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(_, True, _) -> return r
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(True, _, _)
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| remoteAnnexCheckUUID gc -> tryGitConfigRead autoinit r hasuuid
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| otherwise -> return r
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(False, _, False) -> configSpecialGitRemotes r >>= \case
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Nothing -> tryGitConfigRead autoinit r False
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Just r' -> return r'
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_ -> return r
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gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> RemoteStateHandle -> Annex (Maybe Remote)
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gen r u rc gc rs
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-- Remote.GitLFS may be used with a repo that is also encrypted
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-- with gcrypt so is checked first.
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| remoteAnnexGitLFS gc = Remote.GitLFS.gen r u rc gc rs
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| Git.GCrypt.isEncrypted r = Remote.GCrypt.chainGen r u rc gc rs
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| otherwise = case repoP2PAddress r of
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Nothing -> do
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st <- mkState r u gc
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c <- parsedRemoteConfig remote rc
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go st c <$> remoteCost gc defcst
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Just addr -> Remote.P2P.chainGen addr r u rc gc rs
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where
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defcst = if repoCheap r then cheapRemoteCost else expensiveRemoteCost
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go st c cst = Just new
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where
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new = Remote
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{ uuid = u
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, cost = cst
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, name = Git.repoDescribe r
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, storeKey = copyToRemote new st
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, retrieveKeyFile = copyFromRemote new st
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, retrieveKeyFileCheap = copyFromRemoteCheap new st r
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, retrievalSecurityPolicy = RetrievalAllKeysSecure
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, removeKey = dropKey new st
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, lockContent = Just (lockKey new st)
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, checkPresent = inAnnex new st
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, checkPresentCheap = repoCheap r
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, exportActions = exportUnsupported
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, importActions = importUnsupported
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, whereisKey = Nothing
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, remoteFsck = if Git.repoIsUrl r
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then Nothing
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else Just $ fsckOnRemote r
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, repairRepo = if Git.repoIsUrl r
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then Nothing
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else Just $ repairRemote r
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, config = c
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, localpath = localpathCalc r
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, getRepo = getRepoFromState st
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, gitconfig = gc
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, readonly = Git.repoIsHttp r
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, appendonly = False
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, availability = availabilityCalc r
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, remotetype = remote
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, mkUnavailable = unavailable r u rc gc rs
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, getInfo = gitRepoInfo new
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, claimUrl = Nothing
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, checkUrl = Nothing
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, remoteStateHandle = rs
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}
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unavailable :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> RemoteStateHandle -> Annex (Maybe Remote)
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unavailable r = gen r'
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where
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r' = case Git.location r of
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Git.Local { Git.gitdir = d } ->
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r { Git.location = Git.LocalUnknown d }
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Git.Url url -> case uriAuthority url of
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Just auth ->
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let auth' = auth { uriRegName = "!dne!" }
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in r { Git.location = Git.Url (url { uriAuthority = Just auth' })}
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Nothing -> r { Git.location = Git.Unknown }
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_ -> r -- already unavailable
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{- Checks relatively inexpensively if a repository is available for use. -}
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repoAvail :: Git.Repo -> Annex Bool
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repoAvail r
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| Git.repoIsHttp r = return True
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| Git.GCrypt.isEncrypted r = do
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g <- gitRepo
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liftIO $ do
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er <- Git.GCrypt.encryptedRemote g r
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if Git.repoIsLocal er || Git.repoIsLocalUnknown er
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then catchBoolIO $
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void (Git.Config.read er) >> return True
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else return True
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| Git.repoIsUrl r = return True
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| Git.repoIsLocalUnknown r = return False
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| otherwise = liftIO $ isJust <$> catchMaybeIO (Git.Config.read r)
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{- Tries to read the config for a specified remote, updates state, and
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- returns the updated repo. -}
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tryGitConfigRead :: Bool -> Git.Repo -> Bool -> Annex Git.Repo
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tryGitConfigRead autoinit r hasuuid
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| haveconfig r = return r -- already read
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| Git.repoIsSsh r = storeUpdatedRemote $ do
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v <- Ssh.onRemote NoConsumeStdin r
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(pipedconfig Git.Config.ConfigList autoinit (Git.repoDescribe r), return (Left $ giveup "configlist failed"))
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"configlist" [] configlistfields
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case v of
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Right r'
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| haveconfig r' -> return r'
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| otherwise -> configlist_failed
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Left _ -> configlist_failed
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| Git.repoIsHttp r = storeUpdatedRemote geturlconfig
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| Git.GCrypt.isEncrypted r = handlegcrypt =<< getConfigMaybe (remoteAnnexConfig r "uuid")
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| Git.repoIsUrl r = do
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set_ignore "uses a protocol not supported by git-annex" False
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return r
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| otherwise = storeUpdatedRemote $
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liftIO readlocalannexconfig
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`catchNonAsync` const failedreadlocalconfig
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where
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haveconfig = not . M.null . Git.config
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pipedconfig st mustincludeuuuid configloc cmd params = do
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v <- liftIO $ Git.Config.fromPipe r cmd params st
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case v of
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Right (r', val, _err) -> do
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unless (isUUIDConfigured r' || S.null val || not mustincludeuuuid) $ do
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warning $ "Failed to get annex.uuid configuration of repository " ++ Git.repoDescribe r
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warning $ "Instead, got: " ++ show val
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warning $ "This is unexpected; please check the network transport!"
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return $ Right r'
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Left l -> do
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warning $ "Unable to parse git config from " ++ configloc
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return $ Left l
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geturlconfig = Url.withUrlOptionsPromptingCreds $ \uo -> do
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v <- withTmpFile "git-annex.tmp" $ \tmpfile h -> do
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liftIO $ hClose h
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let url = Git.repoLocation r ++ "/config"
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ifM (liftIO $ Url.downloadQuiet nullMeterUpdate url tmpfile uo)
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( Just <$> pipedconfig Git.Config.ConfigNullList False url "git" [Param "config", Param "--null", Param "--list", Param "--file", File tmpfile]
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, return Nothing
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)
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case v of
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Just (Right r') -> do
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-- Cache when http remote is not bare for
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-- optimisation.
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unless (Git.Config.isBare r') $
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setremote setRemoteBare False
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return r'
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_ -> do
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set_ignore "not usable by git-annex" False
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return r
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{- Is this remote just not available, or does
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- it not have git-annex-shell?
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- Find out by trying to fetch from the remote. -}
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configlist_failed = case Git.remoteName r of
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Nothing -> return r
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Just n -> do
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whenM (inRepo $ Git.Command.runBool [Param "fetch", Param "--quiet", Param n]) $ do
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set_ignore "does not have git-annex installed" True
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return r
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set_ignore msg longmessage = do
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case Git.remoteName r of
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Nothing -> noop
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Just n -> do
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warning $ "Remote " ++ n ++ " " ++ msg ++ "; setting annex-ignore"
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when longmessage $
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warning $ "This could be a problem with the git-annex installation on the remote. Please make sure that git-annex-shell is available in PATH when you ssh into the remote. Once you have fixed the git-annex installation, run: git annex enableremote " ++ n
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setremote setRemoteIgnore True
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setremote setter v = case Git.remoteName r of
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Nothing -> noop
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Just _ -> setter r v
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handlegcrypt Nothing = return r
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handlegcrypt (Just _cacheduuid) = do
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-- Generate UUID from the gcrypt-id
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g <- gitRepo
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case Git.GCrypt.remoteRepoId g (Git.remoteName r) of
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Nothing -> return r
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Just v -> storeUpdatedRemote $ liftIO $ setUUID r $
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genUUIDInNameSpace gCryptNameSpace v
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{- The local repo may not yet be initialized, so try to initialize
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- it if allowed. However, if that fails, still return the read
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- git config. -}
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readlocalannexconfig = do
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let check = do
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Annex.BranchState.disableUpdate
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catchNonAsync autoInitialize $ \e ->
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warning $ "remote " ++ Git.repoDescribe r ++
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" :" ++ show e
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Annex.getState Annex.repo
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s <- Annex.new r
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Annex.eval s $ check `finally` stopCoProcesses
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failedreadlocalconfig = do
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unless hasuuid $ case Git.remoteName r of
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Nothing -> noop
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Just n -> do
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warning $ "Remote " ++ n ++ " cannot currently be accessed."
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return r
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configlistfields = if autoinit
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then [(Fields.autoInit, "1")]
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else []
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{- Handles special remotes that can be enabled by the presence of
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- regular git remotes.
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-
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- When a remote repo is found to be such a special remote, its
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- UUID is cached in the git config, and the repo returned with
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- the UUID set.
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-}
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configSpecialGitRemotes :: Git.Repo -> Annex (Maybe Git.Repo)
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configSpecialGitRemotes r = Remote.GitLFS.configKnownUrl r >>= \case
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Nothing -> return Nothing
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Just r' -> Just <$> storeUpdatedRemote (return r')
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storeUpdatedRemote :: Annex Git.Repo -> Annex Git.Repo
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storeUpdatedRemote = observe $ \r' -> do
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l <- Annex.getGitRemotes
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let rs = exchange l r'
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Annex.changeState $ \s -> s { Annex.gitremotes = Just rs }
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where
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exchange [] _ = []
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exchange (old:ls) new
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| Git.remoteName old == Git.remoteName new =
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new : exchange ls new
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| otherwise =
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old : exchange ls new
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|
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{- Checks if a given remote has the content for a key in its annex. -}
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inAnnex :: Remote -> State -> Key -> Annex Bool
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inAnnex rmt st key = do
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repo <- getRepo rmt
|
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inAnnex' repo rmt st key
|
|
|
|
inAnnex' :: Git.Repo -> Remote -> State -> Key -> Annex Bool
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inAnnex' repo rmt st@(State connpool duc _ _ _) key
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| Git.repoIsHttp repo = checkhttp
|
|
| Git.repoIsUrl repo = checkremote
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| otherwise = checklocal
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where
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checkhttp = do
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showChecking repo
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gc <- Annex.getGitConfig
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ifM (Url.withUrlOptionsPromptingCreds $ \uo -> anyM (\u -> Url.checkBoth u (fromKey keySize key) uo) (keyUrls gc repo rmt key))
|
|
( return True
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|
, giveup "not found"
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|
)
|
|
checkremote =
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|
let fallback = Ssh.inAnnex repo key
|
|
in P2PHelper.checkpresent (Ssh.runProto rmt connpool (cantCheck rmt) fallback) key
|
|
checklocal = ifM duc
|
|
( guardUsable repo (cantCheck repo) $
|
|
maybe (cantCheck repo) return
|
|
=<< onLocalFast st (Annex.Content.inAnnexSafe key)
|
|
, cantCheck repo
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|
)
|
|
|
|
keyUrls :: GitConfig -> Git.Repo -> Remote -> Key -> [String]
|
|
keyUrls gc repo r key = map tourl locs'
|
|
where
|
|
tourl l = Git.repoLocation repo ++ "/" ++ l
|
|
-- If the remote is known to not be bare, try the hash locations
|
|
-- used for non-bare repos first, as an optimisation.
|
|
locs
|
|
| remoteAnnexBare remoteconfig == Just False = reverse (annexLocations gc key)
|
|
| otherwise = annexLocations gc key
|
|
#ifndef mingw32_HOST_OS
|
|
locs' = map fromRawFilePath locs
|
|
#else
|
|
locs' = map (replace "\\" "/" . fromRawFilePath) locs
|
|
#endif
|
|
remoteconfig = gitconfig r
|
|
|
|
dropKey :: Remote -> State -> Key -> Annex ()
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|
dropKey r st key = do
|
|
repo <- getRepo r
|
|
dropKey' repo r st key
|
|
|
|
dropKey' :: Git.Repo -> Remote -> State -> Key -> Annex ()
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|
dropKey' repo r st@(State connpool duc _ _ _) key
|
|
| not $ Git.repoIsUrl repo = ifM duc
|
|
( guardUsable repo (giveup "cannot access remote") $
|
|
commitOnCleanup repo r st $ onLocalFast st $ do
|
|
whenM (Annex.Content.inAnnex key) $ do
|
|
let cleanup = logStatus key InfoMissing
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|
Annex.Content.lockContentForRemoval key cleanup $ \lock -> do
|
|
Annex.Content.removeAnnex lock
|
|
cleanup
|
|
Annex.Content.saveState True
|
|
, giveup "remote does not have expected annex.uuid value"
|
|
)
|
|
| Git.repoIsHttp repo = giveup "dropping from http remote not supported"
|
|
| otherwise = commitOnCleanup repo r st $ do
|
|
let fallback = Ssh.dropKey' repo key
|
|
P2PHelper.remove (Ssh.runProto r connpool (return False) fallback) key
|
|
|
|
lockKey :: Remote -> State -> Key -> (VerifiedCopy -> Annex r) -> Annex r
|
|
lockKey r st key callback = do
|
|
repo <- getRepo r
|
|
lockKey' repo r st key callback
|
|
|
|
lockKey' :: Git.Repo -> Remote -> State -> Key -> (VerifiedCopy -> Annex r) -> Annex r
|
|
lockKey' repo r st@(State connpool duc _ _ _) key callback
|
|
| not $ Git.repoIsUrl repo = ifM duc
|
|
( guardUsable repo failedlock $ do
|
|
inorigrepo <- Annex.makeRunner
|
|
-- Lock content from perspective of remote,
|
|
-- and then run the callback in the original
|
|
-- annex monad, not the remote's.
|
|
onLocalFast st $
|
|
Annex.Content.lockContentShared key $
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|
liftIO . inorigrepo . callback
|
|
, failedlock
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|
)
|
|
| Git.repoIsSsh repo = do
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|
showLocking r
|
|
let withconn = Ssh.withP2PSshConnection r connpool fallback
|
|
P2PHelper.lock withconn Ssh.runProtoConn (uuid r) key callback
|
|
| otherwise = failedlock
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|
where
|
|
fallback = withNullHandle $ \nullh -> do
|
|
Just (cmd, params) <- Ssh.git_annex_shell ConsumeStdin
|
|
repo "lockcontent"
|
|
[Param $ serializeKey key] []
|
|
let p = (proc cmd (toCommand params))
|
|
{ std_in = CreatePipe
|
|
, std_out = CreatePipe
|
|
, std_err = UseHandle nullh
|
|
}
|
|
bracketIO (createProcess p) cleanupProcess fallback'
|
|
|
|
fallback' (Just hin, Just hout, Nothing, p) = do
|
|
v <- liftIO $ tryIO $ getProtocolLine hout
|
|
let signaldone = void $ tryNonAsync $ liftIO $ mapM_ tryNonAsync
|
|
[ hPutStrLn hout ""
|
|
, hFlush hout
|
|
, hClose hin
|
|
, hClose hout
|
|
, void $ waitForProcess p
|
|
]
|
|
let checkexited = not . isJust <$> getProcessExitCode p
|
|
case v of
|
|
Left _exited -> do
|
|
showNote "lockcontent failed"
|
|
liftIO $ do
|
|
hClose hin
|
|
hClose hout
|
|
void $ waitForProcess p
|
|
failedlock
|
|
Right l
|
|
| l == Just Ssh.contentLockedMarker -> bracket_
|
|
noop
|
|
signaldone
|
|
(withVerifiedCopy LockedCopy r checkexited callback)
|
|
| otherwise -> do
|
|
showNote "lockcontent failed"
|
|
signaldone
|
|
failedlock
|
|
fallback' _ = error "internal"
|
|
|
|
failedlock = giveup "can't lock content"
|
|
|
|
{- Tries to copy a key's content from a remote's annex to a file. -}
|
|
copyFromRemote :: Remote -> State -> Key -> AssociatedFile -> FilePath -> MeterUpdate -> Annex Verification
|
|
copyFromRemote = copyFromRemote' False
|
|
|
|
copyFromRemote' :: Bool -> Remote -> State -> Key -> AssociatedFile -> FilePath -> MeterUpdate -> Annex Verification
|
|
copyFromRemote' forcersync r st key file dest meterupdate = do
|
|
repo <- getRepo r
|
|
copyFromRemote'' repo forcersync r st key file dest meterupdate
|
|
|
|
copyFromRemote'' :: Git.Repo -> Bool -> Remote -> State -> Key -> AssociatedFile -> FilePath -> MeterUpdate -> Annex Verification
|
|
copyFromRemote'' repo forcersync r st@(State connpool _ _ _ _) key file dest meterupdate
|
|
| Git.repoIsHttp repo = do
|
|
gc <- Annex.getGitConfig
|
|
ok <- Url.withUrlOptionsPromptingCreds $
|
|
Annex.Content.downloadUrl key meterupdate (keyUrls gc repo r key) dest
|
|
unless ok $
|
|
giveup "failed to download content"
|
|
return UnVerified
|
|
| not $ Git.repoIsUrl repo = guardUsable repo (giveup "cannot access remote") $ do
|
|
params <- Ssh.rsyncParams r Download
|
|
u <- getUUID
|
|
hardlink <- wantHardLink
|
|
-- run copy from perspective of remote
|
|
onLocalFast st $ Annex.Content.prepSendAnnex key >>= \case
|
|
Just (object, checksuccess) -> do
|
|
copier <- mkCopier hardlink st params
|
|
(ok, v) <- runTransfer (Transfer Download u (fromKey id key))
|
|
file stdRetry $ \p ->
|
|
metered (Just (combineMeterUpdate p meterupdate)) key $ \_ p' ->
|
|
copier object dest p' checksuccess
|
|
if ok
|
|
then return v
|
|
else giveup "failed to retrieve content from remote"
|
|
Nothing -> giveup "content is not present in remote"
|
|
| Git.repoIsSsh repo = if forcersync
|
|
then do
|
|
(ok, v) <- fallback meterupdate
|
|
if ok
|
|
then return v
|
|
else giveup "failed to retrieve content from remote"
|
|
else P2PHelper.retrieve
|
|
(\p -> Ssh.runProto r connpool (return (False, UnVerified)) (fallback p))
|
|
key file dest meterupdate
|
|
| otherwise = giveup "copying from non-ssh, non-http remote not supported"
|
|
where
|
|
fallback p = unVerified $ feedprogressback $ \p' -> do
|
|
oh <- mkOutputHandlerQuiet
|
|
Ssh.rsyncHelper oh (Just (combineMeterUpdate p' p))
|
|
=<< Ssh.rsyncParamsRemote False r Download key dest file
|
|
|
|
{- Feed local rsync's progress info back to the remote,
|
|
- by forking a feeder thread that runs
|
|
- git-annex-shell transferinfo at the same time
|
|
- git-annex-shell sendkey is running.
|
|
-
|
|
- To avoid extra password prompts, this is only done when ssh
|
|
- connection caching is supported.
|
|
- Note that it actually waits for rsync to indicate
|
|
- progress before starting transferinfo, in order
|
|
- to ensure ssh connection caching works and reuses
|
|
- the connection set up for the sendkey.
|
|
-
|
|
- Also note that older git-annex-shell does not support
|
|
- transferinfo, so stderr is dropped and failure ignored.
|
|
-}
|
|
feedprogressback a = ifM (isJust <$> sshCacheDir)
|
|
( feedprogressback' a
|
|
, a $ const noop
|
|
)
|
|
feedprogressback' a = do
|
|
u <- getUUID
|
|
let AssociatedFile afile = file
|
|
let fields = (Fields.remoteUUID, fromUUID u)
|
|
: maybe [] (\f -> [(Fields.associatedFile, fromRawFilePath f)]) afile
|
|
Just (cmd, params) <- Ssh.git_annex_shell ConsumeStdin
|
|
repo "transferinfo"
|
|
[Param $ serializeKey key] fields
|
|
v <- liftIO (newEmptySV :: IO (MSampleVar Integer))
|
|
pv <- liftIO $ newEmptyMVar
|
|
tid <- liftIO $ forkIO $ void $ tryIO $ do
|
|
bytes <- readSV v
|
|
p <- createProcess $
|
|
(proc cmd (toCommand params))
|
|
{ std_in = CreatePipe
|
|
, std_err = CreatePipe
|
|
}
|
|
putMVar pv p
|
|
hClose $ stderrHandle p
|
|
let h = stdinHandle p
|
|
let send b = do
|
|
hPrint h b
|
|
hFlush h
|
|
send bytes
|
|
forever $
|
|
send =<< readSV v
|
|
let feeder = \n -> do
|
|
meterupdate n
|
|
writeSV v (fromBytesProcessed n)
|
|
|
|
-- It can easily take 0.3 seconds to clean up after
|
|
-- the transferinfo, and all that's involved is shutting
|
|
-- down the process and associated thread cleanly. So,
|
|
-- do it in the background.
|
|
let cleanup = forkIO $ do
|
|
void $ tryIO $ killThread tid
|
|
void $ tryNonAsync $
|
|
maybe noop (void . waitForProcess . processHandle)
|
|
=<< tryTakeMVar pv
|
|
|
|
let forcestop = do
|
|
void $ tryIO $ killThread tid
|
|
void $ tryNonAsync $
|
|
maybe noop cleanupProcess
|
|
=<< tryTakeMVar pv
|
|
|
|
bracketIO noop (const cleanup) (const $ a feeder)
|
|
`onException` liftIO forcestop
|
|
|
|
copyFromRemoteCheap :: Remote -> State -> Git.Repo -> Maybe (Key -> AssociatedFile -> FilePath -> Annex ())
|
|
#ifndef mingw32_HOST_OS
|
|
copyFromRemoteCheap r st repo
|
|
| not $ Git.repoIsUrl repo = Just $ \key _af file -> guardUsable repo (giveup "cannot access remote") $ do
|
|
gc <- getGitConfigFromState st
|
|
loc <- liftIO $ gitAnnexLocation key repo gc
|
|
liftIO $ ifM (R.doesPathExist loc)
|
|
( do
|
|
absloc <- absPath (fromRawFilePath loc)
|
|
createSymbolicLink absloc file
|
|
, giveup "remote does not contain key"
|
|
)
|
|
| Git.repoIsSsh repo = Just $ \key af file ->
|
|
ifM (Annex.Content.preseedTmp key file)
|
|
( void $ copyFromRemote' True r st key af file nullMeterUpdate
|
|
, giveup "cannot preseed rsync with existing content"
|
|
)
|
|
| otherwise = Nothing
|
|
#else
|
|
copyFromRemoteCheap _ _ _ = Nothing
|
|
#endif
|
|
|
|
{- Tries to copy a key's content to a remote's annex. -}
|
|
copyToRemote :: Remote -> State -> Key -> AssociatedFile -> MeterUpdate -> Annex ()
|
|
copyToRemote r st key file meterupdate = do
|
|
repo <- getRepo r
|
|
copyToRemote' repo r st key file meterupdate
|
|
|
|
copyToRemote' :: Git.Repo -> Remote -> State -> Key -> AssociatedFile -> MeterUpdate -> Annex ()
|
|
copyToRemote' repo r st@(State connpool duc _ _ _) key file meterupdate
|
|
| not $ Git.repoIsUrl repo = ifM duc
|
|
( guardUsable repo (giveup "cannot access remote") $ commitOnCleanup repo r st $
|
|
copylocal =<< Annex.Content.prepSendAnnex key
|
|
, giveup "remote does not have expected annex.uuid value"
|
|
)
|
|
| Git.repoIsSsh repo = commitOnCleanup repo r st $
|
|
P2PHelper.store
|
|
(Ssh.runProto r connpool (return False) . copyremotefallback)
|
|
key file meterupdate
|
|
|
|
| otherwise = giveup "copying to non-ssh repo not supported"
|
|
where
|
|
copylocal Nothing = giveup "content not available"
|
|
copylocal (Just (object, checksuccess)) = do
|
|
-- The checksuccess action is going to be run in
|
|
-- the remote's Annex, but it needs access to the local
|
|
-- Annex monad's state.
|
|
checksuccessio <- Annex.withCurrentState checksuccess
|
|
params <- Ssh.rsyncParams r Upload
|
|
u <- getUUID
|
|
hardlink <- wantHardLink
|
|
-- run copy from perspective of remote
|
|
res <- onLocalFast st $ ifM (Annex.Content.inAnnex key)
|
|
( return True
|
|
, runTransfer (Transfer Download u (fromKey id key)) file stdRetry $ \p -> do
|
|
copier <- mkCopier hardlink st params
|
|
let verify = Annex.Content.RemoteVerify r
|
|
let rsp = RetrievalAllKeysSecure
|
|
res <- Annex.Content.getViaTmp rsp verify key $ \dest ->
|
|
metered (Just (combineMeterUpdate meterupdate p)) key $ \_ p' ->
|
|
copier object dest p' (liftIO checksuccessio)
|
|
Annex.Content.saveState True
|
|
return res
|
|
)
|
|
unless res $
|
|
giveup "failed to send content to remote"
|
|
copyremotefallback p = either (const False) id
|
|
<$> tryNonAsync (copyremotefallback' p)
|
|
copyremotefallback' p = Annex.Content.sendAnnex key noop $ \object -> do
|
|
-- This is too broad really, but recvkey normally
|
|
-- verifies content anyway, so avoid complicating
|
|
-- it with a local sendAnnex check and rollback.
|
|
let unlocked = True
|
|
oh <- mkOutputHandlerQuiet
|
|
Ssh.rsyncHelper oh (Just p)
|
|
=<< Ssh.rsyncParamsRemote unlocked r Upload key object file
|
|
|
|
fsckOnRemote :: Git.Repo -> [CommandParam] -> Annex (IO Bool)
|
|
fsckOnRemote r params
|
|
| Git.repoIsUrl r = do
|
|
s <- Ssh.git_annex_shell NoConsumeStdin r "fsck" params []
|
|
return $ case s of
|
|
Nothing -> return False
|
|
Just (c, ps) -> batchCommand c ps
|
|
| otherwise = return $ do
|
|
program <- programPath
|
|
r' <- Git.Config.read r
|
|
environ <- getEnvironment
|
|
let environ' = addEntries
|
|
[ ("GIT_WORK_TREE", fromRawFilePath $ Git.repoPath r')
|
|
, ("GIT_DIR", fromRawFilePath $ Git.localGitDir r')
|
|
] environ
|
|
batchCommandEnv program (Param "fsck" : params) (Just environ')
|
|
|
|
{- The passed repair action is run in the Annex monad of the remote. -}
|
|
repairRemote :: Git.Repo -> Annex Bool -> Annex (IO Bool)
|
|
repairRemote r a = return $ do
|
|
s <- Annex.new r
|
|
Annex.eval s $ do
|
|
Annex.BranchState.disableUpdate
|
|
ensureInitialized
|
|
a `finally` stopCoProcesses
|
|
|
|
data LocalRemoteAnnex = LocalRemoteAnnex Git.Repo (MVar (Maybe Annex.AnnexState))
|
|
|
|
{- This can safely be called on a Repo that is not local, but of course
|
|
- onLocal will not work if used with the result. -}
|
|
mkLocalRemoteAnnex :: Git.Repo -> Annex (LocalRemoteAnnex)
|
|
mkLocalRemoteAnnex repo = LocalRemoteAnnex repo <$> liftIO (newMVar Nothing)
|
|
|
|
{- Runs an action from the perspective of a local remote.
|
|
-
|
|
- The AnnexState is cached for speed and to avoid resource leaks.
|
|
- However, coprocesses are stopped after each call to avoid git
|
|
- processes hanging around on removable media.
|
|
-
|
|
- The remote will be automatically initialized/upgraded first,
|
|
- when possible.
|
|
-}
|
|
onLocal :: State -> Annex a -> Annex a
|
|
onLocal (State _ _ _ _ lra) = onLocal' lra
|
|
|
|
onLocalRepo :: Git.Repo -> Annex a -> Annex a
|
|
onLocalRepo repo a = do
|
|
lra <- mkLocalRemoteAnnex repo
|
|
onLocal' lra a
|
|
|
|
onLocal' :: LocalRemoteAnnex -> Annex a -> Annex a
|
|
onLocal' (LocalRemoteAnnex repo v) a = liftIO (takeMVar v) >>= \case
|
|
Nothing -> do
|
|
st <- liftIO $ Annex.new repo
|
|
go (st, ensureInitialized >> a)
|
|
Just st -> go (st, a)
|
|
where
|
|
go (st, a') = do
|
|
curro <- Annex.getState Annex.output
|
|
let act = Annex.run (st { Annex.output = curro }) $
|
|
a' `finally` stopCoProcesses
|
|
(ret, st') <- liftIO $ act `onException` cache st
|
|
liftIO $ cache st'
|
|
return ret
|
|
cache st = putMVar v (Just st)
|
|
|
|
{- Faster variant of onLocal.
|
|
-
|
|
- The repository's git-annex branch is not updated, as an optimisation.
|
|
- No caller of onLocalFast can query data from the branch and be ensured
|
|
- it gets the most current value. Caller of onLocalFast can make changes
|
|
- to the branch, however.
|
|
-}
|
|
onLocalFast :: State -> Annex a -> Annex a
|
|
onLocalFast st a = onLocal st $ Annex.BranchState.disableUpdate >> a
|
|
|
|
-- To avoid the overhead of trying copy-on-write every time, it's tried
|
|
-- once and if it fails, is not tried again.
|
|
newtype CopyCoWTried = CopyCoWTried (MVar Bool)
|
|
|
|
newCopyCoWTried :: IO CopyCoWTried
|
|
newCopyCoWTried = CopyCoWTried <$> newEmptyMVar
|
|
|
|
{- Copys a file. Uses copy-on-write if it is supported. Otherwise,
|
|
- uses rsync, so that interrupted copies can be resumed. -}
|
|
rsyncOrCopyFile :: State -> [CommandParam] -> FilePath -> FilePath -> MeterUpdate -> Annex Bool
|
|
#ifdef mingw32_HOST_OS
|
|
rsyncOrCopyFile _st _rsyncparams src dest p =
|
|
-- rsync is only available on Windows in some installation methods,
|
|
-- and is not strictly needed here, so don't use it.
|
|
docopywith copyFileExternal
|
|
where
|
|
#else
|
|
rsyncOrCopyFile st rsyncparams src dest p =
|
|
-- If multiple threads reach this at the same time, they
|
|
-- will both try CoW, which is acceptable.
|
|
ifM (liftIO $ isEmptyMVar copycowtried)
|
|
( do
|
|
ok <- docopycow
|
|
void $ liftIO $ tryPutMVar copycowtried ok
|
|
pure ok <||> dorsync
|
|
, ifM (liftIO $ readMVar copycowtried)
|
|
( docopycow <||> dorsync
|
|
, dorsync
|
|
)
|
|
)
|
|
where
|
|
copycowtried = case st of
|
|
State _ _ (CopyCoWTried v) _ _ -> v
|
|
dorsync = do
|
|
-- dest may already exist, so make sure rsync can write to it
|
|
void $ liftIO $ tryIO $ allowWrite dest
|
|
oh <- mkOutputHandlerQuiet
|
|
Ssh.rsyncHelper oh (Just p) $
|
|
rsyncparams ++ [File src, File dest]
|
|
docopycow = docopywith copyCoW
|
|
#endif
|
|
docopywith a = liftIO $ watchFileSize dest p $
|
|
a CopyTimeStamps src dest
|
|
|
|
commitOnCleanup :: Git.Repo -> Remote -> State -> Annex a -> Annex a
|
|
commitOnCleanup repo r st a = go `after` a
|
|
where
|
|
go = Annex.addCleanup (RemoteCleanup $ uuid r) cleanup
|
|
cleanup
|
|
| not $ Git.repoIsUrl repo = onLocalFast st $
|
|
doQuietSideAction $
|
|
Annex.Branch.commit =<< Annex.Branch.commitMessage
|
|
| otherwise = do
|
|
Just (shellcmd, shellparams) <-
|
|
Ssh.git_annex_shell NoConsumeStdin
|
|
repo "commit" [] []
|
|
|
|
-- Throw away stderr, since the remote may not
|
|
-- have a new enough git-annex shell to
|
|
-- support committing.
|
|
liftIO $ void $ catchMaybeIO $ withNullHandle $ \nullh ->
|
|
let p = (proc shellcmd (toCommand shellparams))
|
|
{ std_out = UseHandle nullh
|
|
, std_err = UseHandle nullh
|
|
}
|
|
in withCreateProcess p $ \_ _ _ ->
|
|
forceSuccessProcess p
|
|
|
|
wantHardLink :: Annex Bool
|
|
wantHardLink = (annexHardLink <$> Annex.getGitConfig)
|
|
-- Not unlocked files that are hard linked in the work tree,
|
|
-- because they can be modified at any time.
|
|
<&&> (not <$> annexThin <$> Annex.getGitConfig)
|
|
|
|
-- Copies from src to dest, updating a meter. If the copy finishes
|
|
-- successfully, calls a final check action, which must also succeed, or
|
|
-- returns false.
|
|
--
|
|
-- If either the remote or local repository wants to use hard links,
|
|
-- the copier will do so (falling back to copying if a hard link cannot be
|
|
-- made).
|
|
--
|
|
-- When a hard link is created, returns Verified; the repo being linked
|
|
-- from is implicitly trusted, so no expensive verification needs to be
|
|
-- done.
|
|
type Copier = FilePath -> FilePath -> MeterUpdate -> Annex Bool -> Annex (Bool, Verification)
|
|
|
|
mkCopier :: Bool -> State -> [CommandParam] -> Annex Copier
|
|
mkCopier remotewanthardlink st rsyncparams = do
|
|
let copier = \src dest p check -> unVerified $
|
|
rsyncOrCopyFile st rsyncparams src dest p <&&> check
|
|
localwanthardlink <- wantHardLink
|
|
let linker = \src dest -> createLink src dest >> return True
|
|
if remotewanthardlink || localwanthardlink
|
|
then return $ \src dest p check ->
|
|
ifM (liftIO (catchBoolIO (linker src dest)))
|
|
( return (True, Verified)
|
|
, copier src dest p check
|
|
)
|
|
else return copier
|
|
|
|
{- Normally the UUID of a local repository is checked at startup,
|
|
- but annex-checkuuid config can prevent that. To avoid getting
|
|
- confused, a deferred check is done just before the repository
|
|
- is used.
|
|
- This returns False when the repository UUID is not as expected. -}
|
|
type DeferredUUIDCheck = Annex Bool
|
|
|
|
data State = State Ssh.P2PSshConnectionPool DeferredUUIDCheck CopyCoWTried (Annex (Git.Repo, GitConfig)) LocalRemoteAnnex
|
|
|
|
getRepoFromState :: State -> Annex Git.Repo
|
|
getRepoFromState (State _ _ _ a _) = fst <$> a
|
|
|
|
#ifndef mingw32_HOST_OS
|
|
{- The config of the remote git repository, cached for speed. -}
|
|
getGitConfigFromState :: State -> Annex GitConfig
|
|
getGitConfigFromState (State _ _ _ a _) = snd <$> a
|
|
#endif
|
|
|
|
mkState :: Git.Repo -> UUID -> RemoteGitConfig -> Annex State
|
|
mkState r u gc = do
|
|
pool <- Ssh.mkP2PSshConnectionPool
|
|
copycowtried <- liftIO newCopyCoWTried
|
|
lra <- mkLocalRemoteAnnex r
|
|
(duc, getrepo) <- go
|
|
return $ State pool duc copycowtried getrepo lra
|
|
where
|
|
go
|
|
| remoteAnnexCheckUUID gc = return
|
|
(return True, return (r, extractGitConfig FromGitConfig r))
|
|
| otherwise = do
|
|
rv <- liftIO newEmptyMVar
|
|
let getrepo = ifM (liftIO $ isEmptyMVar rv)
|
|
( do
|
|
r' <- tryGitConfigRead False r True
|
|
let t = (r', extractGitConfig FromGitConfig r')
|
|
void $ liftIO $ tryPutMVar rv t
|
|
return t
|
|
, liftIO $ readMVar rv
|
|
)
|
|
|
|
cv <- liftIO newEmptyMVar
|
|
let duc = ifM (liftIO $ isEmptyMVar cv)
|
|
( do
|
|
r' <- fst <$> getrepo
|
|
u' <- getRepoUUID r'
|
|
let ok = u' == u
|
|
void $ liftIO $ tryPutMVar cv ok
|
|
unless ok $
|
|
warning $ Git.repoDescribe r ++ " is not the expected repository. The remote's annex-checkuuid configuration prevented noticing the change until now."
|
|
return ok
|
|
, liftIO $ readMVar cv
|
|
)
|
|
|
|
return (duc, getrepo)
|