assistant: Detect when repository has been deleted or moved, and automatically shut down the assistant. Closes: #761261

Assistant/Restart.hs

@@ -53,6 +53,10 @@ postRestart url = do
 	liftIO . sendNotification . globalRedirNotifier =<< getDaemonStatus
 	void $ liftIO $ forkIO $ do
 		threadDelaySeconds (Seconds 120)
+		terminateSelf
+
+terminateSelf :: IO ()
+terminateSelf =
 #ifndef mingw32_HOST_OS
 		signalProcess sigTERM =<< getPID
 #else

Assistant/Threads/SanityChecker.hs

@@ -21,7 +21,9 @@ import Assistant.Drop
 import Assistant.Ssh
 import Assistant.TransferQueue
 import Assistant.Types.UrlRenderer
+import Assistant.Restart
 import qualified Annex.Branch
+import qualified Git
 import qualified Git.LsFiles
 import qualified Git.Command.Batch
 import qualified Git.Config
@@ -146,6 +148,8 @@ waitForNextCheck = do
  - will block the watcher. -}
 dailyCheck :: UrlRenderer -> Assistant Bool
 dailyCheck urlrenderer = do
+	checkRepoExists
+
 	g <- liftAnnex gitRepo
 	batchmaker <- liftIO getBatchCommandMaker
 
@@ -203,6 +207,7 @@ dailyCheck urlrenderer = do
 
 hourlyCheck :: Assistant ()
 hourlyCheck = do
+	checkRepoExists
 #ifndef mingw32_HOST_OS
 	checkLogSize 0
 #else
@@ -316,3 +321,9 @@ cleanOld check f = go =<< catchMaybeIO getmtime
 	getmtime = realToFrac . modificationTime <$> getSymbolicLinkStatus f
 	go (Just mtime) | check mtime = nukeFile f
 	go _ = noop
+
+checkRepoExists :: Assistant ()
+checkRepoExists = do
+	g <- liftAnnex gitRepo
+	liftIO $ unlessM (doesDirectoryExist $ Git.repoPath g) $
+		terminateSelf

Assistant/WebApp/Control.hs

@@ -53,15 +53,11 @@ getShutdownConfirmedR = do
 	 - page time to load in the browser. -}
 	void $ liftIO $ forkIO $ do
 		threadDelay 2000000
-#ifndef mingw32_HOST_OS
-		signalProcess sigTERM =<< getPID
-#else
-		terminatePID =<< getPID
-#endif
+		terminateSelf
 	redirect NotRunningR
 
 {- Use a custom page to avoid putting long polling elements on it that will 
- - fail and cause the web browser to show an error once the webapp is
+ - fail and cause thet web browser to show an error once the webapp is
  - truely stopped. -}
 getNotRunningR :: Handler Html
 getNotRunningR = customPage' False Nothing $

debian/changelog

@@ -1,3 +1,10 @@
+git-annex (5.20140916) UNRELEASED; urgency=medium
+
+  * assistant: Detect when repository has been deleted or moved, and
+    automatically shut down the assistant. Closes: #761261
+
+ -- Joey Hess <joeyh@debian.org>  Mon, 15 Sep 2014 14:39:17 -0400
+
 git-annex (5.20140915) unstable; urgency=medium
 
   * New annex.hardlink setting. Closes: #758593