b9275b65f9
Looking at the few current callers, it's ok to have programPath throw an exception, in the unusual case where it cannot find git-annex.
360 lines
11 KiB
Haskell
360 lines
11 KiB
Haskell
{- git-annex assistant upgrading
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-
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- Copyright 2013 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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{-# LANGUAGE CPP #-}
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module Assistant.Upgrade where
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import Assistant.Common
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import Assistant.Restart
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import qualified Annex
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import Assistant.Alert
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import Assistant.DaemonStatus
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import Utility.Env
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import Types.Distribution
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import Logs.Transfer
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import Logs.Web
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import Logs.Presence
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import Logs.Location
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import Annex.Content
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import Annex.UUID
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import qualified Backend
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import qualified Types.Backend
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import qualified Types.Key
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import Assistant.TransferQueue
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import Assistant.TransferSlots
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import Remote (remoteFromUUID)
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import Annex.Path
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import Config.Files
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import Utility.ThreadScheduler
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import Utility.Tmp
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import Utility.UserInfo
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import Utility.Gpg
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import Utility.FileMode
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import qualified Utility.Lsof as Lsof
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import qualified Build.SysConfig
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import qualified Utility.Url as Url
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import qualified Annex.Url as Url
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import qualified Data.Map as M
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import Data.Tuple.Utils
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{- Upgrade without interaction in the webapp. -}
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unattendedUpgrade :: Assistant ()
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unattendedUpgrade = do
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prepUpgrade
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url <- runRestart
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postUpgrade url
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prepUpgrade :: Assistant ()
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prepUpgrade = do
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void $ addAlert upgradingAlert
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liftIO $ setEnv upgradedEnv "1" True
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prepRestart
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postUpgrade :: URLString -> Assistant ()
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postUpgrade = postRestart
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autoUpgradeEnabled :: Assistant Bool
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autoUpgradeEnabled = liftAnnex $ (==) AutoUpgrade . annexAutoUpgrade <$> Annex.getGitConfig
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checkSuccessfulUpgrade :: IO Bool
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checkSuccessfulUpgrade = isJust <$> getEnv upgradedEnv
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upgradedEnv :: String
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upgradedEnv = "GIT_ANNEX_UPGRADED"
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{- Start downloading the distribution key from the web.
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- Install a hook that will be run once the download is complete,
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- and finishes the upgrade.
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-
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- Creates the destination directory where the upgrade will be installed
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- early, in order to check if another upgrade has happened (or is
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- happending). On failure, the directory is removed.
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-}
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startDistributionDownload :: GitAnnexDistribution -> Assistant ()
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startDistributionDownload d = go =<< liftIO . newVersionLocation d =<< liftIO oldVersionLocation
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where
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go Nothing = debug ["Skipping redundant upgrade"]
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go (Just dest) = do
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liftAnnex $ setUrlPresent webUUID k u
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hook <- asIO1 $ distributionDownloadComplete d dest cleanup
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modifyDaemonStatus_ $ \s -> s
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{ transferHook = M.insert k hook (transferHook s) }
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maybe noop (queueTransfer "upgrade" Next (Just f) t)
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=<< liftAnnex (remoteFromUUID webUUID)
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startTransfer t
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k = distributionKey d
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u = distributionUrl d
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f = takeFileName u ++ " (for upgrade)"
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t = Transfer
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{ transferDirection = Download
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, transferUUID = webUUID
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, transferKey = k
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}
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cleanup = liftAnnex $ do
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lockContent k removeAnnex
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setUrlMissing webUUID k u
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logStatus k InfoMissing
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{- Called once the download is done.
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- Passed an action that can be used to clean up the downloaded file.
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-
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- Fsck the key to verify the download.
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-}
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distributionDownloadComplete :: GitAnnexDistribution -> FilePath -> Assistant () -> Transfer -> Assistant ()
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distributionDownloadComplete d dest cleanup t
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| transferDirection t == Download = do
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debug ["finished downloading git-annex distribution"]
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maybe (failedupgrade "bad download") go
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=<< liftAnnex (withObjectLoc k fsckit (getM fsckit))
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| otherwise = cleanup
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where
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k = distributionKey d
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fsckit f = case Backend.maybeLookupBackendName (Types.Key.keyBackendName k) of
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Nothing -> return $ Just f
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Just b -> case Types.Backend.fsckKey b of
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Nothing -> return $ Just f
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Just a -> ifM (a k f)
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( return $ Just f
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, return Nothing
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)
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go f = do
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ua <- asIO $ upgradeToDistribution dest cleanup f
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fa <- asIO1 failedupgrade
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liftIO $ ua `catchNonAsync` (fa . show)
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failedupgrade msg = do
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void $ addAlert $ upgradeFailedAlert msg
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cleanup
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liftIO $ void $ tryIO $ removeDirectoryRecursive dest
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{- The upgrade method varies by OS.
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-
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- In general, find where the distribution was installed before,
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- and unpack the new distribution next to it (in a versioned directory).
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- Then update the programFile to point to the new version.
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-}
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upgradeToDistribution :: FilePath -> Assistant () -> FilePath -> Assistant ()
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upgradeToDistribution newdir cleanup distributionfile = do
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liftIO $ createDirectoryIfMissing True newdir
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(program, deleteold) <- unpack
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changeprogram program
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cleanup
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prepUpgrade
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url <- runRestart
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{- At this point, the new assistant is fully running, so
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- it's safe to delete the old version. -}
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liftIO $ void $ tryIO deleteold
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postUpgrade url
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where
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changeprogram program = liftIO $ do
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unlessM (boolSystem program [Param "version"]) $
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error "New git-annex program failed to run! Not using."
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pf <- programFile
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liftIO $ writeFile pf program
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#ifdef darwin_HOST_OS
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{- OS X uses a dmg, so mount it, and copy the contents into place. -}
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unpack = liftIO $ do
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olddir <- oldVersionLocation
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withTmpDirIn (parentDir newdir) "git-annex.upgrade" $ \tmpdir -> do
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void $ boolSystem "hdiutil"
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[ Param "attach", File distributionfile
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, Param "-mountpoint", File tmpdir
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]
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void $ boolSystem "cp"
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[ Param "-R"
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, File $ tmpdir </> installBase </> "Contents"
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, File $ newdir
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]
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void $ boolSystem "hdiutil"
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[ Param "eject"
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, File tmpdir
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]
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sanitycheck newdir
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let deleteold = do
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deleteFromManifest $ olddir </> "Contents" </> "MacOS"
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makeorigsymlink olddir
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return (newdir </> "Contents" </> "MacOS" </> "git-annex", deleteold)
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#else
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{- Linux uses a tarball (so could other POSIX systems), so
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- untar it (into a temp directory) and move the directory
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- into place. -}
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unpack = liftIO $ do
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olddir <- oldVersionLocation
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withTmpDirIn (parentDir newdir) "git-annex.upgrade" $ \tmpdir -> do
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let tarball = tmpdir </> "tar"
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-- Cannot rely on filename extension, and this also
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-- avoids problems if tar doesn't support transparent
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-- decompression.
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void $ boolSystem "sh"
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[ Param "-c"
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, Param $ "zcat < " ++ shellEscape distributionfile ++
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" > " ++ shellEscape tarball
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]
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tarok <- boolSystem "tar"
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[ Param "xf"
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, Param tarball
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, Param "--directory", File tmpdir
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]
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unless tarok $
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error $ "failed to untar " ++ distributionfile
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sanitycheck $ tmpdir </> installBase
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installby rename newdir (tmpdir </> installBase)
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let deleteold = do
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deleteFromManifest olddir
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makeorigsymlink olddir
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return (newdir </> "git-annex", deleteold)
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installby a dstdir srcdir =
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mapM_ (\x -> a x (dstdir </> takeFileName x))
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=<< dirContents srcdir
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#endif
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sanitycheck dir =
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unlessM (doesDirectoryExist dir) $
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error $ "did not find " ++ dir ++ " in " ++ distributionfile
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makeorigsymlink olddir = do
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let origdir = parentDir olddir </> installBase
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nukeFile origdir
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createSymbolicLink newdir origdir
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{- Finds where the old version was installed. -}
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oldVersionLocation :: IO FilePath
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oldVersionLocation = do
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pdir <- parentDir <$> readProgramFile
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#ifdef darwin_HOST_OS
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let dirs = splitDirectories pdir
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{- It will probably be deep inside a git-annex.app directory. -}
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let olddir = case findIndex ("git-annex.app" `isPrefixOf`) dirs of
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Nothing -> pdir
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Just i -> joinPath (take (i + 1) dirs)
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#else
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let olddir = pdir
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#endif
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when (null olddir) $
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error $ "Cannot find old distribution bundle; not upgrading. (Looked in " ++ pdir ++ ")"
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return olddir
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{- Finds a place to install the new version.
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- Generally, put it in the parent directory of where the old version was
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- installed, and use a version number in the directory name.
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- If unable to write to there, instead put it in the home directory.
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-
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- The directory is created. If it already exists, returns Nothing.
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-}
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newVersionLocation :: GitAnnexDistribution -> FilePath -> IO (Maybe FilePath)
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newVersionLocation d olddir =
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trymkdir newloc $ do
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home <- myHomeDir
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trymkdir (home </> s) $
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return Nothing
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where
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s = installBase ++ "." ++ distributionVersion d
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topdir = parentDir olddir
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newloc = topdir </> s
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trymkdir dir fallback =
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(createDirectory dir >> return (Just dir))
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`catchIO` const fallback
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installBase :: String
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installBase = "git-annex." ++
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#ifdef linux_HOST_OS
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"linux"
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#else
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#ifdef darwin_HOST_OS
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"app"
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#else
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"dir"
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#endif
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#endif
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deleteFromManifest :: FilePath -> IO ()
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deleteFromManifest dir = do
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fs <- map (dir </>) . lines <$> catchDefaultIO "" (readFile manifest)
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mapM_ nukeFile fs
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nukeFile manifest
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removeEmptyRecursive dir
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where
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manifest = dir </> "git-annex.MANIFEST"
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removeEmptyRecursive :: FilePath -> IO ()
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removeEmptyRecursive dir = do
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mapM_ removeEmptyRecursive =<< dirContents dir
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void $ tryIO $ removeDirectory dir
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{- This is a file that the UpgradeWatcher can watch for modifications to
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- detect when git-annex has been upgraded.
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-}
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upgradeFlagFile :: IO FilePath
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upgradeFlagFile = programPath
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{- Sanity check to see if an upgrade is complete and the program is ready
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- to be run. -}
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upgradeSanityCheck :: IO Bool
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upgradeSanityCheck = ifM usingDistribution
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( doesFileExist =<< programFile
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, do
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-- Ensure that the program is present, and has no writers,
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-- and can be run. This should handle distribution
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-- upgrades, manual upgrades, etc.
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program <- programPath
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untilM (doesFileExist program <&&> nowriter program) $
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threadDelaySeconds (Seconds 60)
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boolSystem program [Param "version"]
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)
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where
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nowriter f = null
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. filter (`elem` [Lsof.OpenReadWrite, Lsof.OpenWriteOnly])
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. map snd3
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<$> Lsof.query [f]
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usingDistribution :: IO Bool
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usingDistribution = isJust <$> getEnv "GIT_ANNEX_STANDLONE_ENV"
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downloadDistributionInfo :: Assistant (Maybe GitAnnexDistribution)
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downloadDistributionInfo = do
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uo <- liftAnnex Url.getUrlOptions
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liftIO $ withTmpDir "git-annex.tmp" $ \tmpdir -> do
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let infof = tmpdir </> "info"
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let sigf = infof ++ ".sig"
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ifM (Url.downloadQuiet distributionInfoUrl infof uo
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<&&> Url.downloadQuiet distributionInfoSigUrl sigf uo
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<&&> verifyDistributionSig sigf)
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( readish <$> readFileStrict infof
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, return Nothing
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)
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distributionInfoUrl :: String
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distributionInfoUrl = fromJust Build.SysConfig.upgradelocation ++ ".info"
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distributionInfoSigUrl :: String
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distributionInfoSigUrl = distributionInfoUrl ++ ".sig"
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{- Verifies that a file from the git-annex distribution has a valid
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- signature. Pass the detached .sig file; the file to be verified should
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- be located next to it.
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-
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- The gpg keyring used to verify the signature is located in
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- trustedkeys.gpg, next to the git-annex program.
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-}
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verifyDistributionSig :: FilePath -> IO Bool
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verifyDistributionSig sig = do
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p <- readProgramFile
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if isAbsolute p
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then withUmask 0o0077 $ withTmpDir "git-annex-gpg.tmp" $ \gpgtmp -> do
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let trustedkeys = takeDirectory p </> "trustedkeys.gpg"
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boolSystem gpgcmd
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[ Param "--no-default-keyring"
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, Param "--no-auto-check-trustdb"
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, Param "--no-options"
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, Param "--homedir"
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, File gpgtmp
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, Param "--keyring"
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, File trustedkeys
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, Param "--verify"
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, File sig
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]
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else return False
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