3006b79c86
That and S3 are all that uses creds currently, except that external remotes can use creds. I have not handled showing info about external remote creds because they can have 0, 1, or more separate cred pairs, and there's no way for info to enumerate them or know how they're used. So it seems ok to leave out creds info for external remotes.
301 lines
8.3 KiB
Haskell
301 lines
8.3 KiB
Haskell
{- Amazon Glacier remotes.
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-
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- Copyright 2012 Joey Hess <joey@kitenet.net>
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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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module Remote.Glacier (remote, jobList) where
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import qualified Data.Map as M
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import qualified Data.Text as T
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import qualified Data.ByteString.Lazy as L
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import Common.Annex
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import Types.Remote
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import Types.Key
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import qualified Git
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import Config
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import Config.Cost
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import Remote.Helper.Special
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import qualified Remote.Helper.AWS as AWS
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import Creds
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import Utility.Metered
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import qualified Annex
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import Annex.UUID
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import Utility.Env
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type Vault = String
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type Archive = FilePath
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remote :: RemoteType
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remote = RemoteType {
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typename = "glacier",
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enumerate = findSpecialRemotes "glacier",
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generate = gen,
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setup = glacierSetup
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}
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gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex (Maybe Remote)
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gen r u c gc = new <$> remoteCost gc veryExpensiveRemoteCost
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where
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new cst = Just $ specialRemote' specialcfg c
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(prepareStore this)
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(prepareRetrieve this)
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(simplyPrepare $ remove this)
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(simplyPrepare $ checkKey this)
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this
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where
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this = 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 = storeKeyDummy,
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retrieveKeyFile = retreiveKeyFileDummy,
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retrieveKeyFileCheap = retrieveCheap this,
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removeKey = removeKeyDummy,
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checkPresent = checkPresentDummy,
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checkPresentCheap = False,
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whereisKey = Nothing,
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remoteFsck = Nothing,
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repairRepo = Nothing,
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config = c,
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repo = r,
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gitconfig = gc,
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localpath = Nothing,
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readonly = False,
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availability = GloballyAvailable,
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remotetype = remote,
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mkUnavailable = return Nothing,
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getInfo = includeCredsInfo c (AWS.creds u) $
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[ ("glacier vault", getVault c) ]
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}
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specialcfg = (specialRemoteCfg c)
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-- Disabled until jobList gets support for chunks.
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{ chunkConfig = NoChunks
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}
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glacierSetup :: Maybe UUID -> Maybe CredPair -> RemoteConfig -> Annex (RemoteConfig, UUID)
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glacierSetup mu mcreds c = do
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u <- maybe (liftIO genUUID) return mu
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glacierSetup' (isJust mu) u mcreds c
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glacierSetup' :: Bool -> UUID -> Maybe CredPair -> RemoteConfig -> Annex (RemoteConfig, UUID)
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glacierSetup' enabling u mcreds c = do
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(c', encsetup) <- encryptionSetup c
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c'' <- setRemoteCredPair encsetup c' (AWS.creds u) mcreds
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let fullconfig = c'' `M.union` defaults
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unless enabling $
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genVault fullconfig u
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gitConfigSpecialRemote u fullconfig "glacier" "true"
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return (fullconfig, u)
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where
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remotename = fromJust (M.lookup "name" c)
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defvault = remotename ++ "-" ++ fromUUID u
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defaults = M.fromList
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[ ("datacenter", T.unpack $ AWS.defaultRegion AWS.Glacier)
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, ("vault", defvault)
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]
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prepareStore :: Remote -> Preparer Storer
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prepareStore r = checkPrepare nonEmpty (byteStorer $ store r)
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nonEmpty :: Key -> Annex Bool
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nonEmpty k
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| keySize k == Just 0 = do
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warning "Cannot store empty files in Glacier."
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return False
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| otherwise = return True
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store :: Remote -> Key -> L.ByteString -> MeterUpdate -> Annex Bool
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store r k b p = go =<< glacierEnv c u
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where
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c = config r
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u = uuid r
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params = glacierParams c
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[ Param "archive"
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, Param "upload"
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, Param "--name", Param $ archive r k
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, Param $ getVault $ config r
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, Param "-"
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]
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go Nothing = return False
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go (Just e) = do
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let cmd = (proc "glacier" (toCommand params)) { env = Just e }
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liftIO $ catchBoolIO $
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withHandle StdinHandle createProcessSuccess cmd $ \h -> do
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meteredWrite p h b
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return True
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prepareRetrieve :: Remote -> Preparer Retriever
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prepareRetrieve = simplyPrepare . byteRetriever . retrieve
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retrieve :: Remote -> Key -> (L.ByteString -> Annex Bool) -> Annex Bool
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retrieve r k sink = go =<< glacierEnv c u
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where
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c = config r
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u = uuid r
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params = glacierParams c
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[ Param "archive"
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, Param "retrieve"
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, Param "-o-"
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, Param $ getVault $ config r
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, Param $ archive r k
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]
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go Nothing = error "cannot retrieve from glacier"
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go (Just e) = do
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let cmd = (proc "glacier" (toCommand params))
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{ env = Just e
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, std_out = CreatePipe
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}
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(_, Just h, _, pid) <- liftIO $ createProcess cmd
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-- Glacier cannot store empty files, so if the output is
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-- empty, the content is not available yet.
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ok <- ifM (liftIO $ hIsEOF h)
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( return False
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, sink =<< liftIO (L.hGetContents h)
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)
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liftIO $ hClose h
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liftIO $ forceSuccessProcess cmd pid
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unless ok $ do
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showLongNote "Recommend you wait up to 4 hours, and then run this command again."
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return ok
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retrieveCheap :: Remote -> Key -> FilePath -> Annex Bool
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retrieveCheap _ _ _ = return False
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remove :: Remote -> Remover
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remove r k = glacierAction r
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[ Param "archive"
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, Param "delete"
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, Param $ getVault $ config r
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, Param $ archive r k
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]
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checkKey :: Remote -> CheckPresent
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checkKey r k = do
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showAction $ "checking " ++ name r
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go =<< glacierEnv (config r) (uuid r)
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where
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go Nothing = error "cannot check glacier"
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go (Just e) = do
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{- glacier checkpresent outputs the archive name to stdout if
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- it's present. -}
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s <- liftIO $ readProcessEnv "glacier" (toCommand params) (Just e)
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let probablypresent = key2file k `elem` lines s
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if probablypresent
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then ifM (Annex.getFlag "trustglacier")
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( return True, error untrusted )
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else return False
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params = glacierParams (config r)
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[ Param "archive"
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, Param "checkpresent"
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, Param $ getVault $ config r
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, Param "--quiet"
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, Param $ archive r k
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]
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untrusted = unlines
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[ "Glacier's inventory says it has a copy."
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, "However, the inventory could be out of date, if it was recently removed."
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, "(Use --trust-glacier if you're sure it's still in Glacier.)"
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, ""
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]
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glacierAction :: Remote -> [CommandParam] -> Annex Bool
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glacierAction r = runGlacier (config r) (uuid r)
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runGlacier :: RemoteConfig -> UUID -> [CommandParam] -> Annex Bool
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runGlacier c u params = go =<< glacierEnv c u
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where
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go Nothing = return False
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go (Just e) = liftIO $
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boolSystemEnv "glacier" (glacierParams c params) (Just e)
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glacierParams :: RemoteConfig -> [CommandParam] -> [CommandParam]
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glacierParams c params = datacenter:params
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where
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datacenter = Param $ "--region=" ++
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fromMaybe (error "Missing datacenter configuration")
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(M.lookup "datacenter" c)
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glacierEnv :: RemoteConfig -> UUID -> Annex (Maybe [(String, String)])
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glacierEnv c u = go =<< getRemoteCredPairFor "glacier" c creds
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where
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go Nothing = return Nothing
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go (Just (user, pass)) = do
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e <- liftIO getEnvironment
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return $ Just $ addEntries [(uk, user), (pk, pass)] e
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creds = AWS.creds u
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(uk, pk) = credPairEnvironment creds
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getVault :: RemoteConfig -> Vault
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getVault = fromMaybe (error "Missing vault configuration")
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. M.lookup "vault"
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archive :: Remote -> Key -> Archive
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archive r k = fileprefix ++ key2file k
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where
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fileprefix = M.findWithDefault "" "fileprefix" $ config r
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genVault :: RemoteConfig -> UUID -> Annex ()
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genVault c u = unlessM (runGlacier c u params) $
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error "Failed creating glacier vault."
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where
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params =
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[ Param "vault"
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, Param "create"
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, Param $ getVault c
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]
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{- Partitions the input list of keys into ones which have
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- glacier retieval jobs that have succeeded, or failed.
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-
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- A complication is that `glacier job list` will display the encrypted
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- keys when the remote is encrypted.
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-
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- Dealing with encrypted chunked keys would be tricky. However, there
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- seems to be no benefit to using chunking with glacier, so chunking is
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- not supported.
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-}
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jobList :: Remote -> [Key] -> Annex ([Key], [Key])
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jobList r keys = go =<< glacierEnv (config r) (uuid r)
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where
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params = [ Param "job", Param "list" ]
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nada = ([], [])
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myvault = getVault $ config r
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go Nothing = return nada
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go (Just e) = do
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v <- liftIO $ catchMaybeIO $
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readProcessEnv "glacier" (toCommand params) (Just e)
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maybe (return nada) extract v
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extract s = do
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let result@(succeeded, failed) =
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parse nada $ (map words . lines) s
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if result == nada
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then return nada
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else do
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enckeys <- forM keys $ \k ->
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maybe k (\(_, enck) -> enck k)
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<$> cipherKey (config r)
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let keymap = M.fromList $ zip enckeys keys
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let convert = mapMaybe (`M.lookup` keymap)
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return (convert succeeded, convert failed)
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parse c [] = c
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parse c@(succeeded, failed) ((status:_date:vault:key:[]):rest)
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| vault == myvault =
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case file2key key of
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Nothing -> parse c rest
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Just k
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| "a/d" `isPrefixOf` status ->
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parse (k:succeeded, failed) rest
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| "a/e" `isPrefixOf` status ->
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parse (succeeded, k:failed) rest
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| otherwise ->
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parse c rest
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parse c (_:rest) = parse c rest
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