ad81feb053
Fix bug that made creds not be stored in git when a special remote was initialized with gpg encryption, but without an explicit embedcreds=yes. (Yet nother regression introduced in version 7.20200202.7. 5th so far.)
885 lines
31 KiB
Haskell
885 lines
31 KiB
Haskell
{- External special remote interface.
|
|
-
|
|
- Copyright 2013-2020 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
{-# LANGUAGE OverloadedStrings #-}
|
|
|
|
module Remote.External (remote) where
|
|
|
|
import Remote.External.Types
|
|
import qualified Annex
|
|
import Annex.Common
|
|
import Types.Remote
|
|
import Types.Export
|
|
import Types.CleanupActions
|
|
import Types.UrlContents
|
|
import Types.ProposedAccepted
|
|
import qualified Git
|
|
import Config
|
|
import Git.Config (boolConfig)
|
|
import Git.Env
|
|
import Annex.SpecialRemote.Config
|
|
import Remote.Helper.Special
|
|
import Remote.Helper.ExportImport
|
|
import Remote.Helper.ReadOnly
|
|
import Remote.Helper.Messages
|
|
import Utility.Metered
|
|
import Utility.Shell
|
|
import Messages.Progress
|
|
import Types.Transfer
|
|
import Logs.PreferredContent.Raw
|
|
import Logs.RemoteState
|
|
import Logs.Web
|
|
import Config.Cost
|
|
import Annex.Content
|
|
import Annex.Url
|
|
import Annex.UUID
|
|
import Creds
|
|
|
|
import Control.Concurrent.STM
|
|
import Control.Concurrent.Async
|
|
import System.Log.Logger (debugM)
|
|
import qualified Data.Map as M
|
|
import qualified Data.Set as S
|
|
|
|
remote :: RemoteType
|
|
remote = specialRemoteType $ RemoteType
|
|
{ typename = "external"
|
|
, enumerate = const (findSpecialRemotes "externaltype")
|
|
, generate = gen
|
|
, configParser = remoteConfigParser
|
|
, setup = externalSetup
|
|
, exportSupported = checkExportSupported
|
|
, importSupported = importUnsupported
|
|
}
|
|
|
|
externaltypeField :: RemoteConfigField
|
|
externaltypeField = Accepted "externaltype"
|
|
|
|
readonlyField :: RemoteConfigField
|
|
readonlyField = Accepted "readonly"
|
|
|
|
gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> RemoteStateHandle -> Annex (Maybe Remote)
|
|
gen r u rc gc rs
|
|
-- readonly mode only downloads urls; does not use external program
|
|
| externaltype == "readonly" = do
|
|
c <- parsedRemoteConfig remote rc
|
|
cst <- remoteCost gc expensiveRemoteCost
|
|
mk c cst GloballyAvailable
|
|
readonlyStorer
|
|
retrieveUrl
|
|
readonlyRemoveKey
|
|
(checkKeyUrl r)
|
|
Nothing
|
|
(externalInfo externaltype)
|
|
Nothing
|
|
Nothing
|
|
exportUnsupported
|
|
exportUnsupported
|
|
| otherwise = do
|
|
c <- parsedRemoteConfig remote rc
|
|
external <- newExternal externaltype (Just u) c (Just gc) (Just rs)
|
|
Annex.addCleanup (RemoteCleanup u) $ stopExternal external
|
|
cst <- getCost external r gc
|
|
avail <- getAvailability external r gc
|
|
exportsupported <- if exportTree c
|
|
then checkExportSupported' external
|
|
else return False
|
|
let exportactions = if exportsupported
|
|
then ExportActions
|
|
{ storeExport = storeExportM external
|
|
, retrieveExport = retrieveExportM external
|
|
, removeExport = removeExportM external
|
|
, checkPresentExport = checkPresentExportM external
|
|
, removeExportDirectory = Just $ removeExportDirectoryM external
|
|
, renameExport = renameExportM external
|
|
}
|
|
else exportUnsupported
|
|
-- Cheap exportSupported that replaces the expensive
|
|
-- checkExportSupported now that we've already checked it.
|
|
let cheapexportsupported = if exportsupported
|
|
then exportIsSupported
|
|
else exportUnsupported
|
|
mk c cst avail
|
|
(storeKeyM external)
|
|
(retrieveKeyFileM external)
|
|
(removeKeyM external)
|
|
(checkPresentM external)
|
|
(Just (whereisKeyM external))
|
|
(getInfoM external)
|
|
(Just (claimUrlM external))
|
|
(Just (checkUrlM external))
|
|
exportactions
|
|
cheapexportsupported
|
|
where
|
|
mk c cst avail tostore toretrieve toremove tocheckkey towhereis togetinfo toclaimurl tocheckurl exportactions cheapexportsupported = do
|
|
let rmt = Remote
|
|
{ uuid = u
|
|
, cost = cst
|
|
, name = Git.repoDescribe r
|
|
, storeKey = storeKeyDummy
|
|
, retrieveKeyFile = retrieveKeyFileDummy
|
|
, retrieveKeyFileCheap = Nothing
|
|
-- External special remotes use many http libraries
|
|
-- and have no protection against redirects to
|
|
-- local private web servers, or in some cases
|
|
-- to file:// urls.
|
|
, retrievalSecurityPolicy = mkRetrievalVerifiableKeysSecure gc
|
|
, removeKey = removeKeyDummy
|
|
, lockContent = Nothing
|
|
, checkPresent = checkPresentDummy
|
|
, checkPresentCheap = False
|
|
, exportActions = exportactions
|
|
, importActions = importUnsupported
|
|
, whereisKey = towhereis
|
|
, remoteFsck = Nothing
|
|
, repairRepo = Nothing
|
|
, config = c
|
|
, localpath = Nothing
|
|
, getRepo = return r
|
|
, gitconfig = gc
|
|
, readonly = False
|
|
, appendonly = False
|
|
, availability = avail
|
|
, remotetype = remote
|
|
{ exportSupported = cheapexportsupported }
|
|
, mkUnavailable = gen r u rc
|
|
(gc { remoteAnnexExternalType = Just "!dne!" }) rs
|
|
, getInfo = togetinfo
|
|
, claimUrl = toclaimurl
|
|
, checkUrl = tocheckurl
|
|
, remoteStateHandle = rs
|
|
}
|
|
return $ Just $ specialRemote c
|
|
tostore
|
|
toretrieve
|
|
toremove
|
|
tocheckkey
|
|
rmt
|
|
externaltype = fromMaybe (giveup "missing externaltype") (remoteAnnexExternalType gc)
|
|
|
|
externalSetup :: SetupStage -> Maybe UUID -> Maybe CredPair -> RemoteConfig -> RemoteGitConfig -> Annex (RemoteConfig, UUID)
|
|
externalSetup _ mu _ c gc = do
|
|
u <- maybe (liftIO genUUID) return mu
|
|
pc <- either giveup return $ parseRemoteConfig c lenientRemoteConfigParser
|
|
let readonlyconfig = getRemoteConfigValue readonlyField pc == Just True
|
|
let externaltype = if readonlyconfig
|
|
then "readonly"
|
|
else fromMaybe (giveup "Specify externaltype=") $
|
|
getRemoteConfigValue externaltypeField pc
|
|
(c', _encsetup) <- encryptionSetup c gc
|
|
|
|
c'' <- if readonlyconfig
|
|
then do
|
|
-- Setting annex-readonly is not really necessary
|
|
-- anymore, but older versions of git-annex used
|
|
-- this, not externaltype=readonly, so still set
|
|
-- it.
|
|
setConfig (remoteAnnexConfig (fromJust (lookupName c)) "readonly") (boolConfig True)
|
|
return c'
|
|
else do
|
|
pc' <- either giveup return $ parseRemoteConfig c' lenientRemoteConfigParser
|
|
external <- newExternal externaltype (Just u) pc' (Just gc) Nothing
|
|
-- Now that we have an external, ask it to LISTCONFIGS,
|
|
-- and re-parse the RemoteConfig strictly, so we can
|
|
-- error out if the user provided an unexpected config.
|
|
_ <- either giveup return . parseRemoteConfig c'
|
|
=<< strictRemoteConfigParser external
|
|
handleRequest external INITREMOTE Nothing $ \resp -> case resp of
|
|
INITREMOTE_SUCCESS -> result ()
|
|
INITREMOTE_FAILURE errmsg -> Just $ giveup $
|
|
respErrorMessage "INITREMOTE" errmsg
|
|
_ -> Nothing
|
|
-- Any config changes the external made before
|
|
-- responding to INITREMOTE need to be applied to
|
|
-- the RemoteConfig.
|
|
changes <- withExternalState external $
|
|
liftIO . atomically . readTVar . externalConfigChanges
|
|
return (changes c')
|
|
|
|
gitConfigSpecialRemote u c'' [("externaltype", externaltype)]
|
|
return (M.delete readonlyField c'', u)
|
|
|
|
checkExportSupported :: ParsedRemoteConfig -> RemoteGitConfig -> Annex Bool
|
|
checkExportSupported c gc = do
|
|
let externaltype = fromMaybe (giveup "Specify externaltype=") $
|
|
remoteAnnexExternalType gc <|> getRemoteConfigValue externaltypeField c
|
|
if externaltype == "readonly"
|
|
then return False
|
|
else checkExportSupported'
|
|
=<< newExternal externaltype Nothing c (Just gc) Nothing
|
|
|
|
checkExportSupported' :: External -> Annex Bool
|
|
checkExportSupported' external = go `catchNonAsync` (const (return False))
|
|
where
|
|
go = handleRequest external EXPORTSUPPORTED Nothing $ \resp -> case resp of
|
|
EXPORTSUPPORTED_SUCCESS -> result True
|
|
EXPORTSUPPORTED_FAILURE -> result False
|
|
UNSUPPORTED_REQUEST -> result False
|
|
_ -> Nothing
|
|
|
|
storeKeyM :: External -> Storer
|
|
storeKeyM external = fileStorer $ \k f p ->
|
|
either giveup return =<< go k f p
|
|
where
|
|
go k f p = handleRequestKey external (\sk -> TRANSFER Upload sk f) k (Just p) $ \resp ->
|
|
case resp of
|
|
TRANSFER_SUCCESS Upload k' | k == k' ->
|
|
result (Right ())
|
|
TRANSFER_FAILURE Upload k' errmsg | k == k' ->
|
|
result (Left (respErrorMessage "TRANSFER" errmsg))
|
|
_ -> Nothing
|
|
|
|
retrieveKeyFileM :: External -> Retriever
|
|
retrieveKeyFileM external = fileRetriever $ \d k p ->
|
|
either giveup return =<< go d k p
|
|
where
|
|
go d k p = handleRequestKey external (\sk -> TRANSFER Download sk d) k (Just p) $ \resp ->
|
|
case resp of
|
|
TRANSFER_SUCCESS Download k'
|
|
| k == k' -> result $ Right ()
|
|
TRANSFER_FAILURE Download k' errmsg
|
|
| k == k' -> result $ Left $
|
|
respErrorMessage "TRANSFER" errmsg
|
|
_ -> Nothing
|
|
|
|
removeKeyM :: External -> Remover
|
|
removeKeyM external k = either giveup return =<< go
|
|
where
|
|
go = handleRequestKey external REMOVE k Nothing $ \resp ->
|
|
case resp of
|
|
REMOVE_SUCCESS k'
|
|
| k == k' -> result $ Right ()
|
|
REMOVE_FAILURE k' errmsg
|
|
| k == k' -> result $ Left $
|
|
respErrorMessage "REMOVE" errmsg
|
|
_ -> Nothing
|
|
|
|
checkPresentM :: External -> CheckPresent
|
|
checkPresentM external k = either giveup id <$> go
|
|
where
|
|
go = handleRequestKey external CHECKPRESENT k Nothing $ \resp ->
|
|
case resp of
|
|
CHECKPRESENT_SUCCESS k'
|
|
| k' == k -> result $ Right True
|
|
CHECKPRESENT_FAILURE k'
|
|
| k' == k -> result $ Right False
|
|
CHECKPRESENT_UNKNOWN k' errmsg
|
|
| k' == k -> result $ Left $
|
|
respErrorMessage "CHECKPRESENT" errmsg
|
|
_ -> Nothing
|
|
|
|
whereisKeyM :: External -> Key -> Annex [String]
|
|
whereisKeyM external k = handleRequestKey external WHEREIS k Nothing $ \resp -> case resp of
|
|
WHEREIS_SUCCESS s -> result [s]
|
|
WHEREIS_FAILURE -> result []
|
|
UNSUPPORTED_REQUEST -> result []
|
|
_ -> Nothing
|
|
|
|
storeExportM :: External -> FilePath -> Key -> ExportLocation -> MeterUpdate -> Annex ()
|
|
storeExportM external f k loc p = either giveup return =<< go
|
|
where
|
|
go = handleRequestExport external loc req k (Just p) $ \resp -> case resp of
|
|
TRANSFER_SUCCESS Upload k' | k == k' -> result $ Right ()
|
|
TRANSFER_FAILURE Upload k' errmsg | k == k' ->
|
|
result $ Left $ respErrorMessage "TRANSFER" errmsg
|
|
UNSUPPORTED_REQUEST ->
|
|
result $ Left "TRANSFEREXPORT not implemented by external special remote"
|
|
_ -> Nothing
|
|
req sk = TRANSFEREXPORT Upload sk f
|
|
|
|
retrieveExportM :: External -> Key -> ExportLocation -> FilePath -> MeterUpdate -> Annex ()
|
|
retrieveExportM external k loc d p = either giveup return =<< go
|
|
where
|
|
go = handleRequestExport external loc req k (Just p) $ \resp -> case resp of
|
|
TRANSFER_SUCCESS Download k'
|
|
| k == k' -> result $ Right ()
|
|
TRANSFER_FAILURE Download k' errmsg
|
|
| k == k' -> result $ Left $ respErrorMessage "TRANSFER" errmsg
|
|
UNSUPPORTED_REQUEST ->
|
|
result $ Left "TRANSFEREXPORT not implemented by external special remote"
|
|
_ -> Nothing
|
|
req sk = TRANSFEREXPORT Download sk d
|
|
|
|
checkPresentExportM :: External -> Key -> ExportLocation -> Annex Bool
|
|
checkPresentExportM external k loc = either giveup id <$> go
|
|
where
|
|
go = handleRequestExport external loc CHECKPRESENTEXPORT k Nothing $ \resp -> case resp of
|
|
CHECKPRESENT_SUCCESS k'
|
|
| k' == k -> result $ Right True
|
|
CHECKPRESENT_FAILURE k'
|
|
| k' == k -> result $ Right False
|
|
CHECKPRESENT_UNKNOWN k' errmsg
|
|
| k' == k -> result $ Left $
|
|
respErrorMessage "CHECKPRESENT" errmsg
|
|
UNSUPPORTED_REQUEST -> result $
|
|
Left "CHECKPRESENTEXPORT not implemented by external special remote"
|
|
_ -> Nothing
|
|
|
|
removeExportM :: External -> Key -> ExportLocation -> Annex ()
|
|
removeExportM external k loc = either giveup return =<< go
|
|
where
|
|
go = handleRequestExport external loc REMOVEEXPORT k Nothing $ \resp -> case resp of
|
|
REMOVE_SUCCESS k'
|
|
| k == k' -> result $ Right ()
|
|
REMOVE_FAILURE k' errmsg
|
|
| k == k' -> result $ Left $ respErrorMessage "REMOVE" errmsg
|
|
UNSUPPORTED_REQUEST -> result $
|
|
Left $ "REMOVEEXPORT not implemented by external special remote"
|
|
_ -> Nothing
|
|
|
|
removeExportDirectoryM :: External -> ExportDirectory -> Annex ()
|
|
removeExportDirectoryM external dir = either giveup return =<< go
|
|
where
|
|
go = handleRequest external req Nothing $ \resp -> case resp of
|
|
REMOVEEXPORTDIRECTORY_SUCCESS -> result $ Right ()
|
|
REMOVEEXPORTDIRECTORY_FAILURE -> result $
|
|
Left "failed to remove directory"
|
|
UNSUPPORTED_REQUEST -> result $ Right ()
|
|
_ -> Nothing
|
|
req = REMOVEEXPORTDIRECTORY dir
|
|
|
|
renameExportM :: External -> Key -> ExportLocation -> ExportLocation -> Annex (Maybe ())
|
|
renameExportM external k src dest = either giveup return =<< go
|
|
where
|
|
go = handleRequestExport external src req k Nothing $ \resp -> case resp of
|
|
RENAMEEXPORT_SUCCESS k'
|
|
| k' == k -> result $ Right (Just ())
|
|
RENAMEEXPORT_FAILURE k'
|
|
| k' == k -> result $ Left "failed to rename exported file"
|
|
UNSUPPORTED_REQUEST -> result (Right Nothing)
|
|
_ -> Nothing
|
|
req sk = RENAMEEXPORT sk dest
|
|
|
|
{- Sends a Request to the external remote, and waits for it to generate
|
|
- a Response. That is fed into the responsehandler, which should return
|
|
- the action to run for it (or Nothing if there's a protocol error).
|
|
-
|
|
- While the external remote is processing the Request, it may send
|
|
- any number of RemoteRequests, that are handled here.
|
|
-
|
|
- An external remote process can only handle one request at a time.
|
|
- Concurrent requests will start up additional processes.
|
|
-
|
|
- May throw exceptions, for example on protocol errors, or
|
|
- when the repository cannot be used.
|
|
-}
|
|
handleRequest :: External -> Request -> Maybe MeterUpdate -> ResponseHandler a -> Annex a
|
|
handleRequest external req mp responsehandler =
|
|
withExternalState external $ \st ->
|
|
handleRequest' st external req mp responsehandler
|
|
|
|
handleRequestKey :: External -> (SafeKey -> Request) -> Key -> Maybe MeterUpdate -> ResponseHandler a -> Annex a
|
|
handleRequestKey external mkreq k mp responsehandler = case mkSafeKey k of
|
|
Right sk -> handleRequest external (mkreq sk) mp responsehandler
|
|
Left e -> giveup e
|
|
|
|
{- Export location is first sent in an EXPORT message before
|
|
- the main request. This is done because the ExportLocation can
|
|
- contain spaces etc. -}
|
|
handleRequestExport :: External -> ExportLocation -> (SafeKey -> Request) -> Key -> Maybe MeterUpdate -> ResponseHandler a -> Annex a
|
|
handleRequestExport external loc mkreq k mp responsehandler = do
|
|
withExternalState external $ \st -> do
|
|
checkPrepared st external
|
|
sendMessage st external (EXPORT loc)
|
|
handleRequestKey external mkreq k mp responsehandler
|
|
|
|
handleRequest' :: ExternalState -> External -> Request -> Maybe MeterUpdate -> ResponseHandler a -> Annex a
|
|
handleRequest' st external req mp responsehandler
|
|
| needsPREPARE req = do
|
|
checkPrepared st external
|
|
go
|
|
| otherwise = go
|
|
where
|
|
go = do
|
|
sendMessage st external req
|
|
loop
|
|
loop = receiveMessage st external responsehandler
|
|
(\rreq -> Just $ handleRemoteRequest rreq >> loop)
|
|
(\msg -> Just $ handleAsyncMessage msg >> loop)
|
|
|
|
handleRemoteRequest (PROGRESS bytesprocessed) =
|
|
maybe noop (\a -> liftIO $ a bytesprocessed) mp
|
|
handleRemoteRequest (DIRHASH k) =
|
|
send $ VALUE $ fromRawFilePath $ hashDirMixed def k
|
|
handleRemoteRequest (DIRHASH_LOWER k) =
|
|
send $ VALUE $ fromRawFilePath $ hashDirLower def k
|
|
handleRemoteRequest (SETCONFIG setting value) =
|
|
liftIO $ atomically $ do
|
|
modifyTVar' (externalConfig st) $ \(ParsedRemoteConfig m c) ->
|
|
let m' = M.insert
|
|
(Accepted setting)
|
|
(RemoteConfigValue (PassedThrough value))
|
|
m
|
|
c' = M.insert
|
|
(Accepted setting)
|
|
(Accepted value)
|
|
c
|
|
in ParsedRemoteConfig m' c'
|
|
modifyTVar' (externalConfigChanges st) $ \f ->
|
|
M.insert (Accepted setting) (Accepted value) . f
|
|
handleRemoteRequest (GETCONFIG setting) = do
|
|
value <- maybe "" fromProposedAccepted
|
|
. (M.lookup (Accepted setting))
|
|
. unparsedRemoteConfig
|
|
<$> liftIO (atomically $ readTVar $ externalConfig st)
|
|
send $ VALUE value
|
|
handleRemoteRequest (SETCREDS setting login password) = case (externalUUID external, externalGitConfig external) of
|
|
(Just u, Just gc) -> do
|
|
let v = externalConfig st
|
|
pc <- liftIO $ atomically $ readTVar v
|
|
pc' <- setRemoteCredPair' pc encryptionAlreadySetup gc
|
|
(credstorage setting u)
|
|
(Just (login, password))
|
|
let configchanges = M.differenceWithKey
|
|
(\_k a b -> if a == b then Nothing else Just a)
|
|
(unparsedRemoteConfig pc')
|
|
(unparsedRemoteConfig pc)
|
|
void $ liftIO $ atomically $ do
|
|
_ <- swapTVar v pc'
|
|
modifyTVar' (externalConfigChanges st) $ \f ->
|
|
M.union configchanges . f
|
|
_ -> senderror "cannot send SETCREDS here"
|
|
handleRemoteRequest (GETCREDS setting) = case (externalUUID external, externalGitConfig external) of
|
|
(Just u, Just gc) -> do
|
|
c <- liftIO $ atomically $ readTVar $ externalConfig st
|
|
creds <- fromMaybe ("", "") <$>
|
|
getRemoteCredPair c gc (credstorage setting u)
|
|
send $ CREDS (fst creds) (snd creds)
|
|
_ -> senderror "cannot send GETCREDS here"
|
|
handleRemoteRequest GETUUID = case externalUUID external of
|
|
Just u -> send $ VALUE $ fromUUID u
|
|
Nothing -> senderror "cannot send GETUUID here"
|
|
handleRemoteRequest GETGITDIR =
|
|
send . VALUE . fromRawFilePath =<< fromRepo Git.localGitDir
|
|
handleRemoteRequest (SETWANTED expr) = case externalUUID external of
|
|
Just u -> preferredContentSet u expr
|
|
Nothing -> senderror "cannot send SETWANTED here"
|
|
handleRemoteRequest GETWANTED = case externalUUID external of
|
|
Just u -> do
|
|
expr <- fromMaybe "" . M.lookup u
|
|
<$> preferredContentMapRaw
|
|
send $ VALUE expr
|
|
Nothing -> senderror "cannot send GETWANTED here"
|
|
handleRemoteRequest (SETSTATE key state) =
|
|
case externalRemoteStateHandle external of
|
|
Just h -> setRemoteState h key state
|
|
Nothing -> senderror "cannot send SETSTATE here"
|
|
handleRemoteRequest (GETSTATE key) =
|
|
case externalRemoteStateHandle external of
|
|
Just h -> do
|
|
state <- fromMaybe ""
|
|
<$> getRemoteState h key
|
|
send $ VALUE state
|
|
Nothing -> senderror "cannot send GETSTATE here"
|
|
handleRemoteRequest (SETURLPRESENT key url) =
|
|
setUrlPresent key url
|
|
handleRemoteRequest (SETURLMISSING key url) =
|
|
setUrlMissing key url
|
|
handleRemoteRequest (SETURIPRESENT key uri) =
|
|
withurl (SETURLPRESENT key) uri
|
|
handleRemoteRequest (SETURIMISSING key uri) =
|
|
withurl (SETURLMISSING key) uri
|
|
handleRemoteRequest (GETURLS key prefix) = do
|
|
mapM_ (send . VALUE) =<< getUrlsWithPrefix key prefix
|
|
send (VALUE "") -- end of list
|
|
handleRemoteRequest (DEBUG msg) = liftIO $ debugM "external" msg
|
|
handleRemoteRequest (INFO msg) = showInfo msg
|
|
handleRemoteRequest (VERSION _) = senderror "too late to send VERSION"
|
|
|
|
handleAsyncMessage (ERROR err) = giveup $ "external special remote error: " ++ err
|
|
|
|
send = sendMessage st external
|
|
senderror = sendMessage st external . ERROR
|
|
|
|
credstorage setting u = CredPairStorage
|
|
{ credPairFile = base
|
|
, credPairEnvironment = (base ++ "login", base ++ "password")
|
|
, credPairRemoteField = Accepted setting
|
|
}
|
|
where
|
|
base = replace "/" "_" $ fromUUID u ++ "-" ++ setting
|
|
|
|
withurl mk uri = handleRemoteRequest $ mk $
|
|
setDownloader (show uri) OtherDownloader
|
|
|
|
sendMessage :: Sendable m => ExternalState -> External -> m -> Annex ()
|
|
sendMessage st external m = liftIO $ do
|
|
protocolDebug external st True line
|
|
hPutStrLn h line
|
|
hFlush h
|
|
where
|
|
line = unwords $ formatMessage m
|
|
h = externalSend st
|
|
|
|
{- A response handler can yeild a result, or it can request that another
|
|
- message be consumed from the external result. -}
|
|
data ResponseHandlerResult a
|
|
= Result a
|
|
| GetNextMessage (ResponseHandler a)
|
|
|
|
type ResponseHandler a = Response -> Maybe (Annex (ResponseHandlerResult a))
|
|
|
|
result :: a -> Maybe (Annex (ResponseHandlerResult a))
|
|
result = Just . return . Result
|
|
|
|
{- Waits for a message from the external remote, and passes it to the
|
|
- apppropriate handler.
|
|
-
|
|
- If the handler returns Nothing, this is a protocol error.-}
|
|
receiveMessage
|
|
:: ExternalState
|
|
-> External
|
|
-> ResponseHandler a
|
|
-> (RemoteRequest -> Maybe (Annex a))
|
|
-> (AsyncMessage -> Maybe (Annex a))
|
|
-> Annex a
|
|
receiveMessage st external handleresponse handlerequest handleasync =
|
|
go =<< liftIO (catchMaybeIO $ hGetLine $ externalReceive st)
|
|
where
|
|
go Nothing = protocolError False ""
|
|
go (Just s) = do
|
|
liftIO $ protocolDebug external st False s
|
|
case parseMessage s :: Maybe Response of
|
|
Just resp -> case handleresponse resp of
|
|
Nothing -> protocolError True s
|
|
Just callback -> callback >>= \case
|
|
Result a -> return a
|
|
GetNextMessage handleresponse' ->
|
|
receiveMessage st external handleresponse' handlerequest handleasync
|
|
Nothing -> case parseMessage s :: Maybe RemoteRequest of
|
|
Just req -> maybe (protocolError True s) id (handlerequest req)
|
|
Nothing -> case parseMessage s :: Maybe AsyncMessage of
|
|
Just msg -> maybe (protocolError True s) id (handleasync msg)
|
|
Nothing -> protocolError False s
|
|
protocolError parsed s = giveup $ "external special remote protocol error, unexpectedly received \"" ++ s ++ "\" " ++
|
|
if parsed
|
|
then "(command not allowed at this time)"
|
|
else "(unable to parse command)"
|
|
|
|
protocolDebug :: External -> ExternalState -> Bool -> String -> IO ()
|
|
protocolDebug external st sendto line = debugM "external" $ unwords
|
|
[ externalRemoteProgram (externalType external) ++
|
|
"[" ++ show (externalPid st) ++ "]"
|
|
, if sendto then "<--" else "-->"
|
|
, line
|
|
]
|
|
|
|
{- While the action is running, the ExternalState provided to it will not
|
|
- be available to any other calls.
|
|
-
|
|
- Starts up a new process if no ExternalStates are available.
|
|
-
|
|
- If the action is interrupted by an async exception, the external process
|
|
- is in an unknown state, and may eg be still performing a transfer. So it
|
|
- is killed. The action should not normally throw any exception itself,
|
|
- unless perhaps there's a problem communicating with the external
|
|
- process.
|
|
-}
|
|
withExternalState :: External -> (ExternalState -> Annex a) -> Annex a
|
|
withExternalState external a = do
|
|
st <- get
|
|
r <- a st `onException` liftIO (externalShutdown st True)
|
|
put st -- only when no exception is thrown
|
|
return r
|
|
where
|
|
v = externalState external
|
|
|
|
get = do
|
|
ms <- liftIO $ atomically $ do
|
|
l <- readTVar v
|
|
case l of
|
|
[] -> return Nothing
|
|
(st:rest) -> do
|
|
writeTVar v rest
|
|
return (Just st)
|
|
maybe (startExternal external) return ms
|
|
|
|
put st = liftIO $ atomically $ modifyTVar' v (st:)
|
|
|
|
{- Starts an external remote process running, and checks VERSION and
|
|
- exchanges EXTENSIONS. -}
|
|
startExternal :: External -> Annex ExternalState
|
|
startExternal external = do
|
|
errrelayer <- mkStderrRelayer
|
|
st <- start errrelayer =<< Annex.gitRepo
|
|
receiveMessage st external
|
|
(const Nothing)
|
|
(checkVersion st external)
|
|
(const Nothing)
|
|
sendMessage st external (EXTENSIONS supportedExtensionList)
|
|
-- It responds with a EXTENSIONS_RESPONSE; that extensions list
|
|
-- is reserved for future expansion. UNSUPPORTED_REQUEST is also
|
|
-- accepted.
|
|
receiveMessage st external
|
|
(\resp -> case resp of
|
|
EXTENSIONS_RESPONSE _ -> result ()
|
|
UNSUPPORTED_REQUEST -> result ()
|
|
_ -> Nothing
|
|
)
|
|
(const Nothing)
|
|
(const Nothing)
|
|
return st
|
|
where
|
|
start errrelayer g = liftIO $ do
|
|
cmdpath <- searchPath basecmd
|
|
(cmd, ps) <- maybe (pure (basecmd, [])) findShellCommand cmdpath
|
|
let basep = (proc cmd (toCommand ps))
|
|
{ std_in = CreatePipe
|
|
, std_out = CreatePipe
|
|
, std_err = CreatePipe
|
|
}
|
|
p <- propgit g basep
|
|
pall@(Just hin, Just hout, Just herr, ph) <-
|
|
createProcess p `catchNonAsync` runerr cmdpath
|
|
stderrelay <- async $ errrelayer herr
|
|
cv <- newTVarIO $ externalDefaultConfig external
|
|
ccv <- newTVarIO id
|
|
pv <- newTVarIO Unprepared
|
|
pid <- atomically $ do
|
|
n <- succ <$> readTVar (externalLastPid external)
|
|
writeTVar (externalLastPid external) n
|
|
return n
|
|
let shutdown forcestop = do
|
|
cancel stderrelay
|
|
if forcestop
|
|
then cleanupProcess pall
|
|
else flip onException (cleanupProcess pall) $ do
|
|
hClose herr
|
|
hClose hin
|
|
hClose hout
|
|
void $ waitForProcess ph
|
|
return $ ExternalState
|
|
{ externalSend = hin
|
|
, externalReceive = hout
|
|
, externalPid = pid
|
|
, externalShutdown = shutdown
|
|
, externalPrepared = pv
|
|
, externalConfig = cv
|
|
, externalConfigChanges = ccv
|
|
}
|
|
|
|
basecmd = externalRemoteProgram $ externalType external
|
|
|
|
propgit g p = do
|
|
environ <- propGitEnv g
|
|
return $ p { env = Just environ }
|
|
|
|
runerr (Just cmd) _ =
|
|
giveup $ "Cannot run " ++ cmd ++ " -- Make sure it's executable and that its dependencies are installed."
|
|
runerr Nothing _ = do
|
|
path <- intercalate ":" <$> getSearchPath
|
|
let err = "Cannot run " ++ basecmd ++ " -- It is not installed in PATH (" ++ path ++ ")"
|
|
case (lookupName (unparsedRemoteConfig (externalDefaultConfig external)), remoteAnnexReadOnly <$> externalGitConfig external) of
|
|
(Just rname, Just True) -> giveup $ unlines
|
|
[ err
|
|
, "This remote has annex-readonly=true, and previous versions of"
|
|
, "git-annex would tried to download from it without"
|
|
, "installing " ++ basecmd ++ ". If you want that, you need to set:"
|
|
, "git config remote." ++ rname ++ ".annex-externaltype readonly"
|
|
]
|
|
_ -> giveup err
|
|
|
|
stopExternal :: External -> Annex ()
|
|
stopExternal external = liftIO $ do
|
|
l <- atomically $ swapTVar (externalState external) []
|
|
mapM_ (flip externalShutdown False) l
|
|
|
|
externalRemoteProgram :: ExternalType -> String
|
|
externalRemoteProgram externaltype = "git-annex-remote-" ++ externaltype
|
|
|
|
checkVersion :: ExternalState -> External -> RemoteRequest -> Maybe (Annex ())
|
|
checkVersion st external (VERSION v) = Just $
|
|
if v `elem` supportedProtocolVersions
|
|
then noop
|
|
else sendMessage st external (ERROR "unsupported VERSION")
|
|
checkVersion _ _ _ = Nothing
|
|
|
|
{- If repo has not been prepared, sends PREPARE.
|
|
-
|
|
- If the repo fails to prepare, or failed before, throws an exception with
|
|
- the error message. -}
|
|
checkPrepared :: ExternalState -> External -> Annex ()
|
|
checkPrepared st external = do
|
|
v <- liftIO $ atomically $ readTVar $ externalPrepared st
|
|
case v of
|
|
Prepared -> noop
|
|
FailedPrepare errmsg -> giveup errmsg
|
|
Unprepared ->
|
|
handleRequest' st external PREPARE Nothing $ \resp ->
|
|
case resp of
|
|
PREPARE_SUCCESS -> Just $ do
|
|
setprepared Prepared
|
|
return (Result ())
|
|
PREPARE_FAILURE errmsg -> Just $ do
|
|
let errmsg' = respErrorMessage "PREPARE" errmsg
|
|
setprepared $ FailedPrepare errmsg'
|
|
giveup errmsg'
|
|
_ -> Nothing
|
|
where
|
|
setprepared status = liftIO $ atomically $ void $
|
|
swapTVar (externalPrepared st) status
|
|
|
|
respErrorMessage :: String -> String -> String
|
|
respErrorMessage req err
|
|
| null err = req ++ " failed with no reason given"
|
|
| otherwise = err
|
|
|
|
{- Caches the cost in the git config to avoid needing to start up an
|
|
- external special remote every time time just to ask it what its
|
|
- cost is. -}
|
|
getCost :: External -> Git.Repo -> RemoteGitConfig -> Annex Cost
|
|
getCost external r gc =
|
|
(go =<< remoteCost' gc) `catchNonAsync` const (pure defcst)
|
|
where
|
|
go (Just c) = return c
|
|
go Nothing = do
|
|
c <- handleRequest external GETCOST Nothing $ \req -> case req of
|
|
COST c -> result c
|
|
UNSUPPORTED_REQUEST -> result defcst
|
|
_ -> Nothing
|
|
setRemoteCost r c
|
|
return c
|
|
defcst = expensiveRemoteCost
|
|
|
|
{- Caches the availability in the git config to avoid needing to start up an
|
|
- external special remote every time time just to ask it what its
|
|
- availability is.
|
|
-
|
|
- Most remotes do not bother to implement a reply to this request;
|
|
- globally available is the default.
|
|
-}
|
|
getAvailability :: External -> Git.Repo -> RemoteGitConfig -> Annex Availability
|
|
getAvailability external r gc =
|
|
maybe (catchNonAsync query (const (pure defavail))) return
|
|
(remoteAnnexAvailability gc)
|
|
where
|
|
query = do
|
|
avail <- handleRequest external GETAVAILABILITY Nothing $ \req -> case req of
|
|
AVAILABILITY avail -> result avail
|
|
UNSUPPORTED_REQUEST -> result defavail
|
|
_ -> Nothing
|
|
setRemoteAvailability r avail
|
|
return avail
|
|
defavail = GloballyAvailable
|
|
|
|
claimUrlM :: External -> URLString -> Annex Bool
|
|
claimUrlM external url =
|
|
handleRequest external (CLAIMURL url) Nothing $ \req -> case req of
|
|
CLAIMURL_SUCCESS -> result True
|
|
CLAIMURL_FAILURE -> result False
|
|
UNSUPPORTED_REQUEST -> result False
|
|
_ -> Nothing
|
|
|
|
checkUrlM :: External -> URLString -> Annex UrlContents
|
|
checkUrlM external url =
|
|
handleRequest external (CHECKURL url) Nothing $ \req -> case req of
|
|
CHECKURL_CONTENTS sz f -> result $ UrlContents sz $
|
|
if null f then Nothing else Just f
|
|
CHECKURL_MULTI l -> result $ UrlMulti $ map mkmulti l
|
|
CHECKURL_FAILURE errmsg -> Just $ giveup $
|
|
respErrorMessage "CHECKURL" errmsg
|
|
UNSUPPORTED_REQUEST -> giveup "CHECKURL not implemented by external special remote"
|
|
_ -> Nothing
|
|
where
|
|
mkmulti (u, s, f) = (u, s, f)
|
|
|
|
retrieveUrl :: Retriever
|
|
retrieveUrl = fileRetriever $ \f k p -> do
|
|
us <- getWebUrls k
|
|
unlessM (withUrlOptions $ downloadUrl k p us f) $
|
|
giveup "failed to download content"
|
|
|
|
checkKeyUrl :: Git.Repo -> CheckPresent
|
|
checkKeyUrl r k = do
|
|
showChecking r
|
|
us <- getWebUrls k
|
|
anyM (\u -> withUrlOptions $ checkBoth u (fromKey keySize k)) us
|
|
|
|
getWebUrls :: Key -> Annex [URLString]
|
|
getWebUrls key = filter supported <$> getUrls key
|
|
where
|
|
supported u = snd (getDownloader u) == WebDownloader
|
|
|
|
externalInfo :: ExternalType -> Annex [(String, String)]
|
|
externalInfo et = return [("externaltype", et)]
|
|
|
|
getInfoM :: External -> Annex [(String, String)]
|
|
getInfoM external = (++)
|
|
<$> externalInfo (externalType external)
|
|
<*> handleRequest external GETINFO Nothing (collect [])
|
|
where
|
|
collect l req = case req of
|
|
INFOFIELD f -> Just $ return $
|
|
GetNextMessage $ collectvalue l f
|
|
INFOEND -> result (reverse l)
|
|
UNSUPPORTED_REQUEST -> result []
|
|
_ -> Nothing
|
|
|
|
collectvalue l f req = case req of
|
|
INFOVALUE v -> Just $ return $
|
|
GetNextMessage $ collect ((f, v) : l)
|
|
_ -> Nothing
|
|
|
|
{- All unknown configs are passed through in case the external program
|
|
- uses them. -}
|
|
lenientRemoteConfigParser :: RemoteConfigParser
|
|
lenientRemoteConfigParser =
|
|
addRemoteConfigParser specialRemoteConfigParsers baseRemoteConfigParser
|
|
|
|
baseRemoteConfigParser :: RemoteConfigParser
|
|
baseRemoteConfigParser = RemoteConfigParser
|
|
{ remoteConfigFieldParsers =
|
|
[ optionalStringParser externaltypeField
|
|
(FieldDesc "type of external special remote to use")
|
|
, trueFalseParser readonlyField (Just False)
|
|
(FieldDesc "enable readonly mode")
|
|
]
|
|
, remoteConfigRestPassthrough = Just
|
|
( const True
|
|
, [("*", FieldDesc "all other parameters are passed to external special remote program")]
|
|
)
|
|
}
|
|
|
|
{- When the remote supports LISTCONFIGS, only accept the ones it listed.
|
|
- When it does not, accept all configs. -}
|
|
strictRemoteConfigParser :: External -> Annex RemoteConfigParser
|
|
strictRemoteConfigParser external = listConfigs external >>= \case
|
|
Nothing -> return lenientRemoteConfigParser
|
|
Just l -> do
|
|
let s = S.fromList (map fst l)
|
|
let listed f = S.member (fromProposedAccepted f) s
|
|
return $ lenientRemoteConfigParser
|
|
{ remoteConfigRestPassthrough = Just (listed, l) }
|
|
|
|
listConfigs :: External -> Annex (Maybe [(Setting, FieldDesc)])
|
|
listConfigs external = handleRequest external LISTCONFIGS Nothing (collect [])
|
|
where
|
|
collect l req = case req of
|
|
CONFIG s d -> Just $ return $
|
|
GetNextMessage $ collect ((s, FieldDesc d) : l)
|
|
CONFIGEND -> result (Just (reverse l))
|
|
UNSUPPORTED_REQUEST -> result Nothing
|
|
_ -> Nothing
|
|
|
|
remoteConfigParser :: RemoteConfig -> Annex RemoteConfigParser
|
|
remoteConfigParser c
|
|
-- No need to start the external when there is no config to parse,
|
|
-- or when everything in the config was already accepted; in those
|
|
-- cases the lenient parser will do the same thing as the strict
|
|
-- parser.
|
|
| M.null (M.filter isproposed c) = return lenientRemoteConfigParser
|
|
| otherwise = case parseRemoteConfig c baseRemoteConfigParser of
|
|
Left _ -> return lenientRemoteConfigParser
|
|
Right pc -> case (getRemoteConfigValue externaltypeField pc, getRemoteConfigValue readonlyField pc) of
|
|
(Nothing, _) -> return lenientRemoteConfigParser
|
|
(_, Just True) -> return lenientRemoteConfigParser
|
|
(Just externaltype, _) -> do
|
|
external <- newExternal externaltype Nothing pc Nothing Nothing
|
|
strictRemoteConfigParser external
|
|
where
|
|
isproposed (Accepted _) = False
|
|
isproposed (Proposed _) = True
|