278 lines
8.6 KiB
Haskell
278 lines
8.6 KiB
Haskell
{- Standard git remotes.
|
|
-
|
|
- Copyright 2011 Joey Hess <joey@kitenet.net>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
module Remote.Git (remote, repoAvail) where
|
|
|
|
import Control.Exception.Extensible
|
|
import qualified Data.Map as M
|
|
|
|
import Common.Annex
|
|
import Utility.CopyFile
|
|
import Utility.RsyncFile
|
|
import Annex.Ssh
|
|
import Types.Remote
|
|
import qualified Git
|
|
import qualified Git.Command
|
|
import qualified Git.Config
|
|
import qualified Git.Construct
|
|
import qualified Annex
|
|
import Annex.UUID
|
|
import qualified Annex.Content
|
|
import qualified Annex.BranchState
|
|
import qualified Utility.Url as Url
|
|
import Utility.TempFile
|
|
import Config
|
|
import Init
|
|
|
|
remote :: RemoteType
|
|
remote = RemoteType {
|
|
typename = "git",
|
|
enumerate = list,
|
|
generate = gen,
|
|
setup = error "not supported"
|
|
}
|
|
|
|
list :: Annex [Git.Repo]
|
|
list = do
|
|
c <- fromRepo Git.config
|
|
mapM (tweakurl c) =<< fromRepo Git.remotes
|
|
where
|
|
annexurl n = "remote." ++ n ++ ".annexurl"
|
|
tweakurl c r = do
|
|
let n = fromJust $ Git.remoteName r
|
|
case M.lookup (annexurl n) c of
|
|
Nothing -> return r
|
|
Just url -> inRepo $ \g ->
|
|
Git.Construct.remoteNamed n $
|
|
Git.Construct.fromRemoteLocation url g
|
|
|
|
gen :: Git.Repo -> UUID -> Maybe RemoteConfig -> Annex Remote
|
|
gen r u _ = do
|
|
{- It's assumed to be cheap to read the config of non-URL remotes,
|
|
- so this is done each time git-annex is run. Conversely,
|
|
- the config of an URL remote is only read when there is no
|
|
- cached UUID value. -}
|
|
let cheap = not $ Git.repoIsUrl r
|
|
notignored <- repoNotIgnored r
|
|
r' <- case (cheap, notignored, u) of
|
|
(_, False, _) -> return r
|
|
(True, _, _) -> tryGitConfigRead r
|
|
(False, _, NoUUID) -> tryGitConfigRead r
|
|
_ -> return r
|
|
|
|
u' <- getRepoUUID r'
|
|
|
|
let defcst = if cheap then cheapRemoteCost else expensiveRemoteCost
|
|
cst <- remoteCost r' defcst
|
|
|
|
return Remote {
|
|
uuid = u',
|
|
cost = cst,
|
|
name = Git.repoDescribe r',
|
|
storeKey = copyToRemote r',
|
|
retrieveKeyFile = copyFromRemote r',
|
|
removeKey = dropKey r',
|
|
hasKey = inAnnex r',
|
|
hasKeyCheap = cheap,
|
|
config = Nothing,
|
|
repo = r',
|
|
remotetype = remote
|
|
}
|
|
|
|
{- Tries to read the config for a specified remote, updates state, and
|
|
- returns the updated repo. -}
|
|
tryGitConfigRead :: Git.Repo -> Annex Git.Repo
|
|
tryGitConfigRead r
|
|
| not $ M.null $ Git.config r = return r -- already read
|
|
| Git.repoIsSsh r = store $ onRemote r (pipedconfig, r) "configlist" []
|
|
| Git.repoIsHttp r = store $ safely geturlconfig
|
|
| Git.repoIsUrl r = return r
|
|
| otherwise = store $ safely $ onLocal r $ do
|
|
ensureInitialized
|
|
Annex.getState Annex.repo
|
|
where
|
|
-- Reading config can fail due to IO error or
|
|
-- for other reasons; catch all possible exceptions.
|
|
safely a = do
|
|
result <- liftIO (try a :: IO (Either SomeException Git.Repo))
|
|
case result of
|
|
Left _ -> return r
|
|
Right r' -> return r'
|
|
|
|
pipedconfig cmd params = safely $
|
|
pOpen ReadFromPipe cmd (toCommand params) $
|
|
Git.Config.hRead r
|
|
|
|
geturlconfig = do
|
|
s <- Url.get (Git.repoLocation r ++ "/config")
|
|
withTempFile "git-annex.tmp" $ \tmpfile h -> do
|
|
hPutStr h s
|
|
hClose h
|
|
pOpen ReadFromPipe "git" ["config", "--null", "--list", "--file", tmpfile] $
|
|
Git.Config.hRead r
|
|
|
|
store = observe $ \r' -> do
|
|
g <- gitRepo
|
|
let l = Git.remotes g
|
|
let g' = g { Git.remotes = exchange l r' }
|
|
Annex.changeState $ \s -> s { Annex.repo = g' }
|
|
|
|
exchange [] _ = []
|
|
exchange (old:ls) new =
|
|
if Git.remoteName old == Git.remoteName new
|
|
then new : exchange ls new
|
|
else old : exchange ls new
|
|
|
|
{- Checks if a given remote has the content for a key inAnnex.
|
|
- If the remote cannot be accessed, or if it cannot determine
|
|
- whether it has the content, returns a Left error message.
|
|
-}
|
|
inAnnex :: Git.Repo -> Key -> Annex (Either String Bool)
|
|
inAnnex r key
|
|
| Git.repoIsHttp r = checkhttp
|
|
| Git.repoIsUrl r = checkremote
|
|
| otherwise = checklocal
|
|
where
|
|
checkhttp = liftIO $ go undefined $ keyUrls r key
|
|
where
|
|
go e [] = return $ Left e
|
|
go _ (u:us) = do
|
|
res <- catchMsgIO $ Url.exists u
|
|
case res of
|
|
Left e -> go e us
|
|
v -> return v
|
|
checkremote = do
|
|
showAction $ "checking " ++ Git.repoDescribe r
|
|
onRemote r (check, unknown) "inannex" [Param (show key)]
|
|
where
|
|
check c p = dispatch <$> safeSystem c p
|
|
dispatch ExitSuccess = Right True
|
|
dispatch (ExitFailure 1) = Right False
|
|
dispatch _ = unknown
|
|
checklocal = dispatch <$> check
|
|
where
|
|
check = liftIO $ catchMsgIO $ onLocal r $
|
|
Annex.Content.inAnnexSafe key
|
|
dispatch (Left e) = Left e
|
|
dispatch (Right (Just b)) = Right b
|
|
dispatch (Right Nothing) = unknown
|
|
unknown = Left $ "unable to check " ++ Git.repoDescribe r
|
|
|
|
{- Checks inexpensively if a repository is available for use. -}
|
|
repoAvail :: Git.Repo -> Annex Bool
|
|
repoAvail r
|
|
| Git.repoIsHttp r = return True
|
|
| Git.repoIsUrl r = return True
|
|
| otherwise = liftIO $ catchBoolIO $ onLocal r $ return True
|
|
|
|
{- Runs an action on a local repository inexpensively, by making an annex
|
|
- monad using that repository. -}
|
|
onLocal :: Git.Repo -> Annex a -> IO a
|
|
onLocal r a = do
|
|
-- Avoid re-reading the repository's configuration if it was
|
|
-- already read.
|
|
state <- if M.null $ Git.config r
|
|
then Annex.new r
|
|
else return $ Annex.newState r
|
|
Annex.eval state $ do
|
|
-- No need to update the branch; its data is not used
|
|
-- for anything onLocal is used to do.
|
|
Annex.BranchState.disableUpdate
|
|
observe_ (liftIO Git.Command.reap) a
|
|
|
|
keyUrls :: Git.Repo -> Key -> [String]
|
|
keyUrls r key = map tourl (annexLocations key)
|
|
where
|
|
tourl l = Git.repoLocation r ++ "/" ++ l
|
|
|
|
dropKey :: Git.Repo -> Key -> Annex Bool
|
|
dropKey r key
|
|
| Git.repoIsHttp r = error "dropping from http repo not supported"
|
|
| otherwise = onRemote r (boolSystem, False) "dropkey"
|
|
[ Params "--quiet --force"
|
|
, Param $ show key
|
|
]
|
|
|
|
{- Tries to copy a key's content from a remote's annex to a file. -}
|
|
copyFromRemote :: Git.Repo -> Key -> FilePath -> Annex Bool
|
|
copyFromRemote r key file
|
|
| not $ Git.repoIsUrl r = do
|
|
params <- rsyncParams r
|
|
loc <- liftIO $ gitAnnexLocation key r
|
|
rsyncOrCopyFile params loc file
|
|
| Git.repoIsSsh r = rsyncHelper =<< rsyncParamsRemote r True key file
|
|
| Git.repoIsHttp r = Annex.Content.downloadUrl (keyUrls r key) file
|
|
| otherwise = error "copying from non-ssh, non-http repo not supported"
|
|
|
|
{- Tries to copy a key's content to a remote's annex. -}
|
|
copyToRemote :: Git.Repo -> Key -> Annex Bool
|
|
copyToRemote r key
|
|
| not $ Git.repoIsUrl r = do
|
|
keysrc <- inRepo $ gitAnnexLocation key
|
|
params <- rsyncParams r
|
|
-- run copy from perspective of remote
|
|
liftIO $ onLocal r $ do
|
|
ensureInitialized
|
|
observe_ Annex.Content.saveState $
|
|
Annex.Content.getViaTmp key $
|
|
rsyncOrCopyFile params keysrc
|
|
| Git.repoIsSsh r = do
|
|
keysrc <- inRepo $ gitAnnexLocation key
|
|
rsyncHelper =<< rsyncParamsRemote r False key keysrc
|
|
| otherwise = error "copying to non-ssh repo not supported"
|
|
|
|
rsyncHelper :: [CommandParam] -> Annex Bool
|
|
rsyncHelper p = do
|
|
showOutput -- make way for progress bar
|
|
res <- liftIO $ rsync p
|
|
if res
|
|
then return res
|
|
else do
|
|
showLongNote "rsync failed -- run git annex again to resume file transfer"
|
|
return res
|
|
|
|
{- Copys a file with rsync unless both locations are on the same
|
|
- filesystem. Then cp could be faster. -}
|
|
rsyncOrCopyFile :: [CommandParam] -> FilePath -> FilePath -> Annex Bool
|
|
rsyncOrCopyFile rsyncparams src dest = do
|
|
ss <- liftIO $ getFileStatus $ parentDir src
|
|
ds <- liftIO $ getFileStatus $ parentDir dest
|
|
if deviceID ss == deviceID ds
|
|
then liftIO $ copyFileExternal src dest
|
|
else rsyncHelper $ rsyncparams ++ [Param src, Param dest]
|
|
|
|
{- Generates rsync parameters that ssh to the remote and asks it
|
|
- to either receive or send the key's content. -}
|
|
rsyncParamsRemote :: Git.Repo -> Bool -> Key -> FilePath -> Annex [CommandParam]
|
|
rsyncParamsRemote r sending key file = do
|
|
Just (shellcmd, shellparams) <- git_annex_shell r
|
|
(if sending then "sendkey" else "recvkey")
|
|
[ Param $ show key
|
|
-- Command is terminated with "--", because
|
|
-- rsync will tack on its own options afterwards,
|
|
-- and they need to be ignored.
|
|
, Param "--"
|
|
]
|
|
-- Convert the ssh command into rsync command line.
|
|
let eparam = rsyncShell (Param shellcmd:shellparams)
|
|
o <- rsyncParams r
|
|
if sending
|
|
then return $ o ++ eparam ++ [dummy, File file]
|
|
else return $ o ++ eparam ++ [File file, dummy]
|
|
where
|
|
-- the rsync shell parameter controls where rsync
|
|
-- goes, so the source/dest parameter can be a dummy value,
|
|
-- that just enables remote rsync mode.
|
|
dummy = Param ":"
|
|
|
|
rsyncParams :: Git.Repo -> Annex [CommandParam]
|
|
rsyncParams r = do
|
|
o <- getConfig r "rsync-options" ""
|
|
return $ options ++ map Param (words o)
|
|
where
|
|
-- --inplace to resume partial files
|
|
options = [Params "-p --progress --inplace"]
|