529 lines
16 KiB
Haskell
529 lines
16 KiB
Haskell
{- Standard git remotes.
|
|
-
|
|
- Copyright 2011-2012 Joey Hess <joey@kitenet.net>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
{-# LANGUAGE CPP #-}
|
|
|
|
module Remote.Git (
|
|
remote,
|
|
configRead,
|
|
repoAvail,
|
|
) where
|
|
|
|
import Common.Annex
|
|
import Annex.Ssh
|
|
import Types.Remote
|
|
import Types.GitConfig
|
|
import qualified Git
|
|
import qualified Git.Config
|
|
import qualified Git.Construct
|
|
import qualified Git.Command
|
|
import qualified Git.GCrypt
|
|
import qualified Annex
|
|
import Logs.Presence
|
|
import Logs.Transfer
|
|
import Annex.UUID
|
|
import Annex.Exception
|
|
import qualified Annex.Content
|
|
import qualified Annex.BranchState
|
|
import qualified Annex.Branch
|
|
import qualified Annex.Url as Url
|
|
import Utility.Tmp
|
|
import Config
|
|
import Config.Cost
|
|
import Annex.Init
|
|
import Types.Key
|
|
import Types.CleanupActions
|
|
import qualified CmdLine.GitAnnexShell.Fields as Fields
|
|
import Logs.Location
|
|
import Utility.Metered
|
|
#ifndef mingw32_HOST_OS
|
|
import Utility.CopyFile
|
|
#endif
|
|
import Utility.Env
|
|
import Utility.Batch
|
|
import Remote.Helper.Git
|
|
import Remote.Helper.Messages
|
|
import qualified Remote.Helper.Ssh as Ssh
|
|
import qualified Remote.GCrypt
|
|
import Config.Files
|
|
|
|
import Control.Concurrent
|
|
import Control.Concurrent.MSampleVar
|
|
import System.Process (std_in, std_err)
|
|
import qualified Data.Map as M
|
|
import Control.Exception.Extensible
|
|
|
|
remote :: RemoteType
|
|
remote = RemoteType {
|
|
typename = "git",
|
|
enumerate = list,
|
|
generate = gen,
|
|
setup = error "not supported"
|
|
}
|
|
|
|
list :: Annex [Git.Repo]
|
|
list = do
|
|
c <- fromRepo Git.config
|
|
rs <- mapM (tweakurl c) =<< fromRepo Git.remotes
|
|
mapM configRead rs
|
|
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
|
|
|
|
{- It's assumed to be cheap to read the config of non-URL remotes, so this is
|
|
- done each time git-annex is run in a way that uses remotes.
|
|
-
|
|
- Conversely, the config of an URL remote is only read when there is no
|
|
- cached UUID value. -}
|
|
configRead :: Git.Repo -> Annex Git.Repo
|
|
configRead r = do
|
|
g <- fromRepo id
|
|
let c = extractRemoteGitConfig g (Git.repoDescribe r)
|
|
u <- getRepoUUID r
|
|
case (repoCheap r, remoteAnnexIgnore c, u) of
|
|
(_, True, _) -> return r
|
|
(True, _, _) -> tryGitConfigRead r
|
|
(False, _, NoUUID) -> tryGitConfigRead r
|
|
_ -> return r
|
|
|
|
gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex (Maybe Remote)
|
|
gen r u c gc
|
|
| Git.GCrypt.isEncrypted r = Remote.GCrypt.gen r u c gc
|
|
| otherwise = go <$> remoteCost gc defcst
|
|
where
|
|
defcst = if repoCheap r then cheapRemoteCost else expensiveRemoteCost
|
|
go cst = Just new
|
|
where
|
|
new = Remote
|
|
{ uuid = u
|
|
, cost = cst
|
|
, name = Git.repoDescribe r
|
|
, storeKey = copyToRemote new
|
|
, retrieveKeyFile = copyFromRemote new
|
|
, retrieveKeyFileCheap = copyFromRemoteCheap new
|
|
, removeKey = dropKey new
|
|
, hasKey = inAnnex new
|
|
, hasKeyCheap = repoCheap r
|
|
, whereisKey = Nothing
|
|
, remoteFsck = if Git.repoIsUrl r
|
|
then Nothing
|
|
else Just $ fsckOnRemote r
|
|
, repairRepo = if Git.repoIsUrl r
|
|
then Nothing
|
|
else Just $ repairRemote r
|
|
, config = c
|
|
, localpath = localpathCalc r
|
|
, repo = r
|
|
, gitconfig = gc
|
|
{ remoteGitConfig = Just $ extractGitConfig r }
|
|
, readonly = Git.repoIsHttp r
|
|
, availability = availabilityCalc r
|
|
, remotetype = remote
|
|
}
|
|
|
|
{- Checks relatively inexpensively if a repository is available for use. -}
|
|
repoAvail :: Git.Repo -> Annex Bool
|
|
repoAvail r
|
|
| Git.repoIsHttp r = return True
|
|
| Git.GCrypt.isEncrypted r = do
|
|
g <- gitRepo
|
|
liftIO $ do
|
|
er <- Git.GCrypt.encryptedRemote g r
|
|
if Git.repoIsLocal er || Git.repoIsLocalUnknown er
|
|
then catchBoolIO $
|
|
void (Git.Config.read er) >> return True
|
|
else return True
|
|
| Git.repoIsUrl r = return True
|
|
| Git.repoIsLocalUnknown r = return False
|
|
| otherwise = liftIO $ isJust <$> catchMaybeIO (Git.Config.read r)
|
|
|
|
{- Tries to read the config for a specified remote, updates state, and
|
|
- returns the updated repo. -}
|
|
tryGitConfigRead :: Git.Repo -> Annex Git.Repo
|
|
tryGitConfigRead r
|
|
| haveconfig r = return r -- already read
|
|
| Git.repoIsSsh r = store $ do
|
|
v <- Ssh.onRemote r (pipedconfig, Left undefined) "configlist" [] []
|
|
case v of
|
|
Right r'
|
|
| haveconfig r' -> return r'
|
|
| otherwise -> configlist_failed
|
|
Left _ -> configlist_failed
|
|
| Git.repoIsHttp r = store geturlconfig
|
|
| Git.GCrypt.isEncrypted r = handlegcrypt =<< getConfigMaybe (remoteConfig r "uuid")
|
|
| Git.repoIsUrl r = return r
|
|
| otherwise = store $ safely $ do
|
|
s <- Annex.new r
|
|
Annex.eval s $ do
|
|
Annex.BranchState.disableUpdate
|
|
ensureInitialized
|
|
Annex.getState Annex.repo
|
|
where
|
|
haveconfig = not . M.null . Git.config
|
|
|
|
-- Reading config can fail due to IO error or
|
|
-- for other reasons; catch all possible exceptions.
|
|
safely a = either (const $ return r) return
|
|
=<< liftIO (try a :: IO (Either SomeException Git.Repo))
|
|
|
|
pipedconfig cmd params = do
|
|
v <- Git.Config.fromPipe r cmd params
|
|
case v of
|
|
Right (r', val) -> do
|
|
when (getUncachedUUID r' == NoUUID && not (null val)) $ do
|
|
warningIO $ "Failed to get annex.uuid configuration of repository " ++ Git.repoDescribe r
|
|
warningIO $ "Instead, got: " ++ show val
|
|
warningIO $ "This is unexpected; please check the network transport!"
|
|
return $ Right r'
|
|
Left l -> return $ Left l
|
|
|
|
geturlconfig = do
|
|
uo <- Url.getUrlOptions
|
|
v <- liftIO $ withTmpFile "git-annex.tmp" $ \tmpfile h -> do
|
|
hClose h
|
|
ifM (Url.downloadQuiet (Git.repoLocation r ++ "/config") tmpfile uo)
|
|
( pipedconfig "git" [Param "config", Param "--null", Param "--list", Param "--file", File tmpfile]
|
|
, return $ Left undefined
|
|
)
|
|
case v of
|
|
Left _ -> do
|
|
set_ignore "not usable by git-annex"
|
|
return r
|
|
Right r' -> do
|
|
-- Cache when http remote is not bare for
|
|
-- optimisation.
|
|
unless (Git.Config.isBare r') $
|
|
setremote "annex-bare" (Git.Config.boolConfig False)
|
|
return 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
|
|
| Git.remoteName old == Git.remoteName new =
|
|
new : exchange ls new
|
|
| otherwise =
|
|
old : exchange ls new
|
|
|
|
{- Is this remote just not available, or does
|
|
- it not have git-annex-shell?
|
|
- Find out by trying to fetch from the remote. -}
|
|
configlist_failed = case Git.remoteName r of
|
|
Nothing -> return r
|
|
Just n -> do
|
|
whenM (inRepo $ Git.Command.runBool [Param "fetch", Param "--quiet", Param n]) $
|
|
set_ignore "does not have git-annex installed"
|
|
return r
|
|
|
|
set_ignore msg = do
|
|
let k = "annex-ignore"
|
|
case Git.remoteName r of
|
|
Nothing -> noop
|
|
Just n -> warning $ "Remote " ++ n ++ " " ++ msg ++ "; setting " ++ k
|
|
setremote k (Git.Config.boolConfig True)
|
|
|
|
setremote k v = case Git.remoteName r of
|
|
Nothing -> noop
|
|
Just n -> do
|
|
let k' = "remote." ++ n ++ "." ++ k
|
|
inRepo $ Git.Command.run [Param "config", Param k', Param v]
|
|
|
|
handlegcrypt Nothing = return r
|
|
handlegcrypt (Just _cacheduuid) = do
|
|
-- Generate UUID from the gcrypt-id
|
|
g <- gitRepo
|
|
case Git.GCrypt.remoteRepoId g (Git.remoteName r) of
|
|
Nothing -> return r
|
|
Just v -> store $ liftIO $ setUUID r $
|
|
genUUIDInNameSpace gCryptNameSpace v
|
|
|
|
{- 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 :: Remote -> Key -> Annex (Either String Bool)
|
|
inAnnex rmt key
|
|
| Git.repoIsHttp r = checkhttp
|
|
| Git.repoIsUrl r = checkremote
|
|
| otherwise = checklocal
|
|
where
|
|
r = repo rmt
|
|
checkhttp = do
|
|
showChecking r
|
|
ifM (Url.withUrlOptions $ \uo -> anyM (\u -> Url.checkBoth u (keySize key) uo) (keyUrls rmt key))
|
|
( return $ Right True
|
|
, return $ Left "not found"
|
|
)
|
|
checkremote = Ssh.inAnnex r key
|
|
checklocal = guardUsable r (cantCheck r) $ dispatch <$> check
|
|
where
|
|
check = either (Left . show) Right
|
|
<$> tryAnnex (onLocal rmt $ Annex.Content.inAnnexSafe key)
|
|
dispatch (Left e) = Left e
|
|
dispatch (Right (Just b)) = Right b
|
|
dispatch (Right Nothing) = cantCheck r
|
|
|
|
keyUrls :: Remote -> Key -> [String]
|
|
keyUrls r key = map tourl locs'
|
|
where
|
|
tourl l = Git.repoLocation (repo r) ++ "/" ++ 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 (gitconfig r) == Just False = reverse (annexLocations key)
|
|
| otherwise = annexLocations key
|
|
#ifndef mingw32_HOST_OS
|
|
locs' = locs
|
|
#else
|
|
locs' = map (replace "\\" "/") locs
|
|
#endif
|
|
|
|
dropKey :: Remote -> Key -> Annex Bool
|
|
dropKey r key
|
|
| not $ Git.repoIsUrl (repo r) =
|
|
guardUsable (repo r) False $ commitOnCleanup r $ onLocal r $ do
|
|
ensureInitialized
|
|
whenM (Annex.Content.inAnnex key) $ do
|
|
Annex.Content.lockContent key $
|
|
Annex.Content.removeAnnex key
|
|
logStatus key InfoMissing
|
|
Annex.Content.saveState True
|
|
return True
|
|
| Git.repoIsHttp (repo r) = error "dropping from http remote not supported"
|
|
| otherwise = commitOnCleanup r $ Ssh.dropKey (repo r) key
|
|
|
|
{- Tries to copy a key's content from a remote's annex to a file. -}
|
|
copyFromRemote :: Remote -> Key -> AssociatedFile -> FilePath -> MeterUpdate -> Annex Bool
|
|
copyFromRemote r key file dest _p = copyFromRemote' r key file dest
|
|
copyFromRemote' :: Remote -> Key -> AssociatedFile -> FilePath -> Annex Bool
|
|
copyFromRemote' r key file dest
|
|
| not $ Git.repoIsUrl (repo r) = guardUsable (repo r) False $ do
|
|
let params = Ssh.rsyncParams r Download
|
|
u <- getUUID
|
|
-- run copy from perspective of remote
|
|
onLocal r $ do
|
|
ensureInitialized
|
|
v <- Annex.Content.prepSendAnnex key
|
|
case v of
|
|
Nothing -> return False
|
|
Just (object, checksuccess) ->
|
|
upload u key file noRetry
|
|
(rsyncOrCopyFile params object dest)
|
|
<&&> checksuccess
|
|
| Git.repoIsSsh (repo r) = feedprogressback $ \feeder -> do
|
|
direct <- isDirect
|
|
Ssh.rsyncHelper (Just feeder)
|
|
=<< Ssh.rsyncParamsRemote direct r Download key dest file
|
|
| Git.repoIsHttp (repo r) = Annex.Content.downloadUrl (keyUrls r key) dest
|
|
| otherwise = error "copying from non-ssh, non-http remote not supported"
|
|
where
|
|
{- 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 fields = (Fields.remoteUUID, fromUUID u)
|
|
: maybe [] (\f -> [(Fields.associatedFile, f)]) file
|
|
Just (cmd, params) <- Ssh.git_annex_shell (repo r) "transferinfo"
|
|
[Param $ key2file key] fields
|
|
v <- liftIO (newEmptySV :: IO (MSampleVar Integer))
|
|
tid <- liftIO $ forkIO $ void $ tryIO $ do
|
|
bytes <- readSV v
|
|
p <- createProcess $
|
|
(proc cmd (toCommand params))
|
|
{ std_in = CreatePipe
|
|
, std_err = CreatePipe
|
|
}
|
|
hClose $ stderrHandle p
|
|
let h = stdinHandle p
|
|
let send b = do
|
|
hPrint h b
|
|
hFlush h
|
|
send bytes
|
|
forever $
|
|
send =<< readSV v
|
|
let feeder = writeSV v . fromBytesProcessed
|
|
bracketIO noop (const $ tryIO $ killThread tid) (const $ a feeder)
|
|
|
|
copyFromRemoteCheap :: Remote -> Key -> FilePath -> Annex Bool
|
|
#ifndef mingw32_HOST_OS
|
|
copyFromRemoteCheap r key file
|
|
| not $ Git.repoIsUrl (repo r) = guardUsable (repo r) False $ do
|
|
loc <- liftIO $ gitAnnexLocation key (repo r) $
|
|
fromJust $ remoteGitConfig $ gitconfig r
|
|
liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True
|
|
| Git.repoIsSsh (repo r) =
|
|
ifM (Annex.Content.preseedTmp key file)
|
|
( copyFromRemote' r key Nothing file
|
|
, return False
|
|
)
|
|
| otherwise = return False
|
|
#else
|
|
copyFromRemoteCheap _ _ _ = return False
|
|
#endif
|
|
|
|
{- Tries to copy a key's content to a remote's annex. -}
|
|
copyToRemote :: Remote -> Key -> AssociatedFile -> MeterUpdate -> Annex Bool
|
|
copyToRemote r key file p
|
|
| not $ Git.repoIsUrl (repo r) =
|
|
guardUsable (repo r) 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
|
|
let params = Ssh.rsyncParams r Upload
|
|
u <- getUUID
|
|
-- run copy from perspective of remote
|
|
onLocal r $ ifM (Annex.Content.inAnnex key)
|
|
( return True
|
|
, do
|
|
ensureInitialized
|
|
download u key file noRetry $ const $
|
|
Annex.Content.saveState True `after`
|
|
Annex.Content.getViaTmpChecked (liftIO checksuccessio) key
|
|
(\d -> rsyncOrCopyFile params object d p)
|
|
)
|
|
|
|
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 <- readProgramFile
|
|
r' <- Git.Config.read r
|
|
env <- getEnvironment
|
|
let env' = addEntries
|
|
[ ("GIT_WORK_TREE", Git.repoPath r')
|
|
, ("GIT_DIR", Git.localGitDir r')
|
|
] env
|
|
batchCommandEnv program (Param "fsck" : params) $ Just env'
|
|
|
|
{- 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.
|
|
-
|
|
- 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
|
|
(ret, st') <- liftIO $ Annex.run st 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 src dest)
|
|
watchfilesize oldsz = do
|
|
threadDelay 500000 -- 0.5 seconds
|
|
v <- catchMaybeIO $
|
|
toBytesProcessed . fileSize
|
|
<$> getFileStatus 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
|