2def1d0a23
In c6632ee5c8, it actually only handled
uploading objects to a shared repository. To avoid verification when
downloading objects from a shared repository, was a lot harder.
On the plus side, if the process of downloading a file from a remote
is able to verify its content on the side, the remote can indicate this
now, and avoid the extra post-download verification.
As of yet, I don't have any remotes (except Git) using this ability.
Some more work would be needed to support it in special remotes.
It would make sense for tahoe to implicitly verify things downloaded from it;
as long as you trust your tahoe server (which typically runs locally),
there's cryptographic integrity. OTOH, despite bup being based on shas,
a bup repo under an attacker's control could have the git ref used for an
object changed, and so a bup repo shouldn't implicitly verify. Indeed,
tahoe seems unique in being trustworthy enough to implicitly verify.
650 lines
21 KiB
Haskell
650 lines
21 KiB
Haskell
{- Standard git remotes.
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-
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- Copyright 2011-2012 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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{-# LANGUAGE CPP #-}
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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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) where
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import Common.Annex
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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 Utility.Tmp
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import Config
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import Config.Cost
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import Annex.Init
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import Types.Key
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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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#ifndef mingw32_HOST_OS
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import Utility.CopyFile
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#endif
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import Utility.Env
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import Utility.Batch
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import Remote.Helper.Git
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import Remote.Helper.Messages
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import qualified Remote.Helper.Ssh as Ssh
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import qualified Remote.GCrypt
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import Annex.Path
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import Creds
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import Annex.CatFile
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import Messages.Progress
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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 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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setup = gitSetup
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}
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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) =<< fromRepo Git.remotes
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mapM (configRead autoinit) rs
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where
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annexurl n = "remote." ++ n ++ ".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 n) 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 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 :: Maybe UUID -> Maybe CredPair -> RemoteConfig -> Annex (RemoteConfig, UUID)
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gitSetup Nothing _ c = do
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let location = fromMaybe (error "Specify location=url") $
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Url.parseURIRelaxed =<< M.lookup "location" c
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g <- Annex.gitRepo
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u <- case filter (\r -> Git.location r == Git.Url location) (Git.remotes g) of
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[r] -> getRepoUUID r
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[] -> error "could not find existing git remote with specified location"
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_ -> error "found multiple git remotes with specified location"
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return (c, u)
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gitSetup (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 (error "no name") (M.lookup "name" c)
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, Param $ fromMaybe (error "no location") (M.lookup "location" c)
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]
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return (c, u)
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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.
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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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u <- getRepoUUID r
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case (repoCheap r, remoteAnnexIgnore gc, u) of
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(_, True, _) -> return r
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(True, _, _) -> tryGitConfigRead autoinit r
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(False, _, NoUUID) -> tryGitConfigRead autoinit r
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_ -> return r
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gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex (Maybe Remote)
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gen r u c gc
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| Git.GCrypt.isEncrypted r = Remote.GCrypt.chainGen r u c gc
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| otherwise = go <$> remoteCost gc defcst
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where
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defcst = if repoCheap r then cheapRemoteCost else expensiveRemoteCost
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go 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
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, retrieveKeyFile = copyFromRemote new
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, retrieveKeyFileCheap = copyFromRemoteCheap new
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, removeKey = dropKey new
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, checkPresent = inAnnex new
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, checkPresentCheap = repoCheap r
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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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, repo = r
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, gitconfig = gc
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{ remoteGitConfig = Just $ extractGitConfig r }
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, readonly = Git.repoIsHttp r
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, availability = availabilityCalc r
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, remotetype = remote
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, mkUnavailable = unavailable r u c gc
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, getInfo = gitRepoInfo new
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, claimUrl = Nothing
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, checkUrl = Nothing
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}
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unavailable :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex (Maybe Remote)
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unavailable r u c gc = gen r' u c gc
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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 -> Annex Git.Repo
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tryGitConfigRead autoinit r
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| haveconfig r = return r -- already read
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| Git.repoIsSsh r = store $ do
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v <- Ssh.onRemote r (pipedconfig, return (Left $ error "configlist failed")) "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 = store geturlconfig
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| Git.GCrypt.isEncrypted r = handlegcrypt =<< getConfigMaybe (remoteConfig r "uuid")
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| Git.repoIsUrl r = return r
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| otherwise = store $ liftIO $
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readlocalannexconfig `catchNonAsync` (const $ return r)
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where
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haveconfig = not . M.null . Git.config
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pipedconfig cmd params = do
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v <- Git.Config.fromPipe r cmd params
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case v of
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Right (r', val) -> do
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when (getUncachedUUID r' == NoUUID && not (null val)) $ do
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warningIO $ "Failed to get annex.uuid configuration of repository " ++ Git.repoDescribe r
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warningIO $ "Instead, got: " ++ show val
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warningIO $ "This is unexpected; please check the network transport!"
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return $ Right r'
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Left l -> return $ Left l
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geturlconfig = do
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uo <- Url.getUrlOptions
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v <- liftIO $ withTmpFile "git-annex.tmp" $ \tmpfile h -> do
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hClose h
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let url = Git.repoLocation r ++ "/config"
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ifM (Url.downloadQuiet url tmpfile uo)
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( pipedconfig "git" [Param "config", Param "--null", Param "--list", Param "--file", File tmpfile]
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, return $ Left $ error $ "unable to load config from " ++ url
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)
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case v of
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Left _ -> do
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set_ignore "not usable by git-annex" False
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return r
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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 "annex-bare" (Git.Config.boolConfig False)
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return r'
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store = observe $ \r' -> do
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g <- gitRepo
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let l = Git.remotes g
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let g' = g { Git.remotes = exchange l r' }
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Annex.changeState $ \s -> s { Annex.repo = g' }
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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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{- 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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let k = "annex-ignore"
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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 " ++ k
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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 config remote." ++ n ++ "." ++ k ++ " false"
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setremote k (Git.Config.boolConfig True)
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setremote k v = case Git.remoteName r of
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Nothing -> noop
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Just n -> do
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let k' = "remote." ++ n ++ "." ++ k
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inRepo $ Git.Command.run [Param "config", Param k', Param 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 -> store $ 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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s <- Annex.new r
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Annex.eval s $ do
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Annex.BranchState.disableUpdate
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void $ tryNonAsync $ ensureInitialized
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Annex.getState Annex.repo
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configlistfields = if autoinit
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then [(Fields.autoInit, "1")]
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else []
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{- Checks if a given remote has the content for a key in its annex. -}
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inAnnex :: Remote -> Key -> Annex Bool
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inAnnex rmt key
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| Git.repoIsHttp r = checkhttp
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| Git.repoIsUrl r = checkremote
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| otherwise = checklocal
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where
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r = repo rmt
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checkhttp = do
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showChecking r
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ifM (Url.withUrlOptions $ \uo -> anyM (\u -> Url.checkBoth u (keySize key) uo) (keyUrls rmt key))
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( return True
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, error "not found"
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)
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checkremote = Ssh.inAnnex r key
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checklocal = guardUsable r (cantCheck r) $
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maybe (cantCheck r) return
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=<< onLocal rmt (Annex.Content.inAnnexSafe key)
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keyUrls :: Remote -> Key -> [String]
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keyUrls r key = map tourl locs'
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where
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tourl l = Git.repoLocation (repo r) ++ "/" ++ l
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-- If the remote is known to not be bare, try the hash locations
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-- used for non-bare repos first, as an optimisation.
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locs
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| remoteAnnexBare remoteconfig == Just False = reverse (annexLocations cfg key)
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| otherwise = annexLocations cfg key
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#ifndef mingw32_HOST_OS
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locs' = locs
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#else
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locs' = map (replace "\\" "/") locs
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#endif
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remoteconfig = gitconfig r
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cfg = fromJust $ remoteGitConfig remoteconfig
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dropKey :: Remote -> Key -> Annex Bool
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dropKey r key
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| not $ Git.repoIsUrl (repo r) =
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guardUsable (repo r) (return False) $
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commitOnCleanup r $ onLocal r $ do
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ensureInitialized
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whenM (Annex.Content.inAnnex key) $ do
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Annex.Content.lockContent key
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Annex.Content.removeAnnex
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logStatus key InfoMissing
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Annex.Content.saveState True
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return True
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| Git.repoIsHttp (repo r) = error "dropping from http remote not supported"
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| otherwise = commitOnCleanup r $ Ssh.dropKey (repo r) key
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{- Tries to copy a key's content from a remote's annex to a file. -}
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copyFromRemote :: Remote -> Key -> AssociatedFile -> FilePath -> MeterUpdate -> Annex (Bool, Verification)
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copyFromRemote r key file dest p = parallelMetered (Just p) key file $
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copyFromRemote' r key file dest
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copyFromRemote' :: Remote -> Key -> AssociatedFile -> FilePath -> MeterUpdate -> Annex (Bool, Verification)
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copyFromRemote' r key file dest meterupdate
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| not $ Git.repoIsUrl (repo r) = guardUsable (repo r) (unVerified (return False)) $ do
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params <- Ssh.rsyncParams r Download
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u <- getUUID
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hardlink <- wantHardLink
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-- run copy from perspective of remote
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onLocal r $ do
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ensureInitialized
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v <- Annex.Content.prepSendAnnex key
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case v of
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Nothing -> return (False, UnVerified)
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Just (object, checksuccess) -> do
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copier <- mkCopier hardlink params
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runTransfer (Transfer Download u key)
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file noRetry noObserver
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(\p -> copier object dest p checksuccess)
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| Git.repoIsSsh (repo r) = unVerified $ feedprogressback $ \feeder -> do
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direct <- isDirect
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Ssh.rsyncHelper (Just feeder)
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=<< Ssh.rsyncParamsRemote direct r Download key dest file
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| Git.repoIsHttp (repo r) = unVerified $ Annex.Content.downloadUrl (keyUrls r key) dest
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| otherwise = error "copying from non-ssh, non-http remote not supported"
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where
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{- Feed local rsync's progress info back to the remote,
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- by forking a feeder thread that runs
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- git-annex-shell transferinfo at the same time
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- git-annex-shell sendkey is running.
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-
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- To avoid extra password prompts, this is only done when ssh
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- connection caching is supported.
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- Note that it actually waits for rsync to indicate
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- progress before starting transferinfo, in order
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- to ensure ssh connection caching works and reuses
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- the connection set up for the sendkey.
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-
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- Also note that older git-annex-shell does not support
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- transferinfo, so stderr is dropped and failure ignored.
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-}
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feedprogressback a = ifM (isJust <$> sshCacheDir)
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( feedprogressback' a
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, a $ const noop
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)
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feedprogressback' a = do
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u <- getUUID
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let fields = (Fields.remoteUUID, fromUUID u)
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: maybe [] (\f -> [(Fields.associatedFile, f)]) file
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Just (cmd, params) <- Ssh.git_annex_shell (repo r) "transferinfo"
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[Param $ key2file key] fields
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v <- liftIO (newEmptySV :: IO (MSampleVar Integer))
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pidv <- liftIO $ newEmptyMVar
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tid <- liftIO $ forkIO $ void $ tryIO $ do
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bytes <- readSV v
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p <- createProcess $
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(proc cmd (toCommand params))
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{ std_in = CreatePipe
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, std_err = CreatePipe
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}
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putMVar pidv (processHandle p)
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hClose $ stderrHandle p
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let h = stdinHandle p
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let send b = do
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hPrint h b
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hFlush h
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send bytes
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forever $
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send =<< readSV v
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let feeder = \n -> do
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meterupdate n
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writeSV v (fromBytesProcessed n)
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|
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-- It can easily take 0.3 seconds to clean up after
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-- the transferinfo, and all that's involved is shutting
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-- down the process and associated thread cleanly. So,
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-- do it in the background.
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let cleanup = forkIO $ do
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void $ tryIO $ killThread tid
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void $ tryNonAsync $
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maybe noop (void . waitForProcess)
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=<< tryTakeMVar pidv
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bracketIO noop (const cleanup) (const $ a feeder)
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|
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copyFromRemoteCheap :: Remote -> Key -> AssociatedFile -> FilePath -> Annex Bool
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#ifndef mingw32_HOST_OS
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copyFromRemoteCheap r key af file
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| not $ Git.repoIsUrl (repo r) = guardUsable (repo r) (return False) $ liftIO $ do
|
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loc <- gitAnnexLocation key (repo r) $
|
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fromJust $ remoteGitConfig $ gitconfig r
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ifM (doesFileExist loc)
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( do
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absloc <- absPath loc
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catchBoolIO $ do
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createSymbolicLink absloc file
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return True
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, return False
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)
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| Git.repoIsSsh (repo r) =
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ifM (Annex.Content.preseedTmp key file)
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( fst <$> parallelMetered Nothing key af
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(copyFromRemote' r key af file)
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, return False
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)
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|
| otherwise = return False
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|
#else
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copyFromRemoteCheap _ _ _ _ = return False
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#endif
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|
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{- Tries to copy a key's content to a remote's annex. -}
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copyToRemote :: Remote -> Key -> AssociatedFile -> MeterUpdate -> Annex Bool
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copyToRemote r key file p = parallelMetered (Just p) key file $ copyToRemote' r key file
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|
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copyToRemote' :: Remote -> Key -> AssociatedFile -> MeterUpdate -> Annex Bool
|
|
copyToRemote' r key file p
|
|
| not $ Git.repoIsUrl (repo r) =
|
|
guardUsable (repo r) (return False) $ commitOnCleanup r $
|
|
copylocal =<< Annex.Content.prepSendAnnex key
|
|
| Git.repoIsSsh (repo r) = commitOnCleanup r $
|
|
Annex.Content.sendAnnex key noop $ \object -> do
|
|
direct <- isDirect
|
|
Ssh.rsyncHelper (Just p)
|
|
=<< Ssh.rsyncParamsRemote direct r Upload key object file
|
|
| otherwise = error "copying to non-ssh repo not supported"
|
|
where
|
|
copylocal Nothing = return False
|
|
copylocal (Just (object, checksuccess)) = do
|
|
-- The checksuccess action is going to be run in
|
|
-- the remote's Annex, but it needs access to the current
|
|
-- Annex monad's state.
|
|
checksuccessio <- Annex.withCurrentState checksuccess
|
|
params <- Ssh.rsyncParams r Upload
|
|
u <- getUUID
|
|
hardlink <- wantHardLink
|
|
-- run copy from perspective of remote
|
|
onLocal r $ ifM (Annex.Content.inAnnex key)
|
|
( return True
|
|
, do
|
|
ensureInitialized
|
|
copier <- mkCopier hardlink params
|
|
let verify = Annex.Content.RemoteVerify r
|
|
runTransfer (Transfer Download u key) file noRetry noObserver $ const $
|
|
Annex.Content.saveState True `after`
|
|
Annex.Content.getViaTmp verify key
|
|
(\dest -> copier object dest p (liftIO checksuccessio))
|
|
)
|
|
|
|
fsckOnRemote :: Git.Repo -> [CommandParam] -> Annex (IO Bool)
|
|
fsckOnRemote r params
|
|
| Git.repoIsUrl r = do
|
|
s <- Ssh.git_annex_shell 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", Git.repoPath r')
|
|
, ("GIT_DIR", 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
|
|
|
|
{- Runs an action from the perspective of a local remote.
|
|
-
|
|
- The AnnexState is cached for speed and to avoid resource leaks.
|
|
- However, catFileStop is called to avoid git-cat-file processes hanging
|
|
- around on removable media.
|
|
-
|
|
- The repository's git-annex branch is not updated, as an optimisation.
|
|
- No caller of onLocal can query data from the branch and be ensured
|
|
- it gets a current value. Caller of onLocal can make changes to
|
|
- the branch, however.
|
|
-}
|
|
onLocal :: Remote -> Annex a -> Annex a
|
|
onLocal r a = do
|
|
m <- Annex.getState Annex.remoteannexstate
|
|
case M.lookup (uuid r) m of
|
|
Nothing -> do
|
|
st <- liftIO $ Annex.new (repo r)
|
|
go st $ do
|
|
Annex.BranchState.disableUpdate
|
|
a
|
|
Just st -> go st a
|
|
where
|
|
cache st = Annex.changeState $ \s -> s
|
|
{ Annex.remoteannexstate = M.insert (uuid r) st (Annex.remoteannexstate s) }
|
|
go st a' = do
|
|
curro <- Annex.getState Annex.output
|
|
(ret, st') <- liftIO $ Annex.run (st { Annex.output = curro }) $
|
|
catFileStop `after` a'
|
|
cache st'
|
|
return ret
|
|
|
|
{- Copys a file with rsync unless both locations are on the same
|
|
- filesystem. Then cp could be faster. -}
|
|
rsyncOrCopyFile :: [CommandParam] -> FilePath -> FilePath -> MeterUpdate -> Annex Bool
|
|
rsyncOrCopyFile rsyncparams src dest p =
|
|
#ifdef mingw32_HOST_OS
|
|
dorsync
|
|
where
|
|
#else
|
|
ifM (sameDeviceIds src dest) (docopy, dorsync)
|
|
where
|
|
sameDeviceIds a b = (==) <$> getDeviceId a <*> getDeviceId b
|
|
getDeviceId f = deviceID <$> liftIO (getFileStatus $ parentDir f)
|
|
docopy = liftIO $ bracket
|
|
(forkIO $ watchfilesize zeroBytesProcessed)
|
|
(void . tryIO . killThread)
|
|
(const $ copyFileExternal CopyTimeStamps src dest)
|
|
watchfilesize oldsz = do
|
|
threadDelay 500000 -- 0.5 seconds
|
|
v <- catchMaybeIO $ toBytesProcessed <$> getFileSize dest
|
|
case v of
|
|
Just sz
|
|
| sz /= oldsz -> do
|
|
p sz
|
|
watchfilesize sz
|
|
_ -> watchfilesize oldsz
|
|
#endif
|
|
dorsync = Ssh.rsyncHelper (Just p) $
|
|
rsyncparams ++ [File src, File dest]
|
|
|
|
commitOnCleanup :: Remote -> Annex a -> Annex a
|
|
commitOnCleanup r a = go `after` a
|
|
where
|
|
go = Annex.addCleanup (RemoteCleanup $ uuid r) cleanup
|
|
cleanup
|
|
| not $ Git.repoIsUrl (repo r) = onLocal r $
|
|
doQuietSideAction $
|
|
Annex.Branch.commit "update"
|
|
| otherwise = void $ do
|
|
Just (shellcmd, shellparams) <-
|
|
Ssh.git_annex_shell (repo r) "commit" [] []
|
|
|
|
-- Throw away stderr, since the remote may not
|
|
-- have a new enough git-annex shell to
|
|
-- support committing.
|
|
liftIO $ catchMaybeIO $
|
|
withQuietOutput createProcessSuccess $
|
|
proc shellcmd $
|
|
toCommand shellparams
|
|
|
|
wantHardLink :: Annex Bool
|
|
wantHardLink = (annexHardLink <$> Annex.getGitConfig) <&&> (not <$> isDirect)
|
|
|
|
-- Copies from src to dest, updating a meter. If the copy finishes
|
|
-- successfully, calls a final check action, which must also success, 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 -> [CommandParam] -> Annex Copier
|
|
mkCopier remotewanthardlink rsyncparams = do
|
|
let copier = \src dest p check -> unVerified $
|
|
rsyncOrCopyFile rsyncparams src dest p <&&> check
|
|
#ifndef mingw32_HOST_OS
|
|
localwanthardlink <- wantHardLink
|
|
let linker = \src dest -> createLink src dest >> return True
|
|
ifM (pure (remotewanthardlink || localwanthardlink) <&&> not <$> isDirect)
|
|
( return $ \src dest p check ->
|
|
ifM (liftIO (catchBoolIO (linker src dest)))
|
|
( return (True, Verified)
|
|
, copier src dest p check
|
|
)
|
|
, return copier
|
|
)
|
|
#else
|
|
return copier
|
|
#endif
|