Test: Use more robust directory removal method.

I just had a test that crashed at cleanup on linux with:

.t/gpgtest/12/S.gpg-agent.browser: removeDirectoryRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:getSymbolicLinkStatus: does not exist (No such file or directory)
sleeping 10 seconds and will retry directory cleanup
git-annex: .t/gpgtest/14/S.gpg-agent.browser: removeDirectoryRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:getSymbolicLinkStatus: does not exist (No such file or directory)

removePathForcibly is supposed to be more robust to things in the directory vanishing while it's running, etc.
Will probably avoid such crashes.

It was added to directory-1.2.7, which comes with ghc since 8.0.2.
Since base >= 4.11.1.0 means ghc 8.4.4, I expect all builds will have it,
but I ifdefed it to be sure.

CHANGELOG

@@ -4,6 +4,7 @@ git-annex (7.20190913) UNRELEASED; urgency=medium
   * Added --unlocked and --locked file matching options.
   * git-lfs: Added support for http basic auth.
   * git-lfs: Only do endpoint discovery once when concurrency is enabled.
+  * Test: Use more robust directory removal when built with directory-1.2.7.
 
  -- Joey Hess <id@joeyh.name>  Thu, 19 Sep 2019 11:11:19 -0400
 

Test/Framework.hs

@@ -5,6 +5,8 @@
  - Licensed under the GNU AGPL version 3 or higher.
  -}
 
+{-# LANGUAGE CPP #-}
+
 module Test.Framework where
 
 import Test.Tasty
@@ -223,26 +225,33 @@ isolateGitConfig a = Utility.Tmp.Dir.withTmpDir "testhome" $ \tmphome -> do
 	Utility.Env.Set.setEnv "GIT_CONFIG_NOSYSTEM" "1" True
 	a
 
+removeDirectoryForCleanup :: FilePath -> IO ()
+#ifdef MIN_VERSION_directory(1,2,7)
+removeDirectoryForCleanup = removePathForcibly
+#else
+removeDirectoryForCleanup = removeDirectoryRecursive
+#endif
+
 cleanup :: FilePath -> IO ()
 cleanup dir = whenM (doesDirectoryExist dir) $ do
 	Command.Uninit.prepareRemoveAnnexDir' dir
 	-- This can fail if files in the directory are still open by a
 	-- subprocess.
-	void $ tryIO $ removeDirectoryRecursive dir
+	void $ tryIO $ removeDirectoryForCleanup dir
 
 finalCleanup :: IO ()
 finalCleanup = whenM (doesDirectoryExist tmpdir) $ do
 	Annex.Action.reapZombies
 	Command.Uninit.prepareRemoveAnnexDir' tmpdir
-	catchIO (removeDirectoryRecursive tmpdir) $ \e -> do
+	catchIO (removeDirectoryForCleanup tmpdir) $ \e -> do
 		print e
 		putStrLn "sleeping 10 seconds and will retry directory cleanup"
 		Utility.ThreadScheduler.threadDelaySeconds $
 			Utility.ThreadScheduler.Seconds 10
 		whenM (doesDirectoryExist tmpdir) $ do
 			Annex.Action.reapZombies
-			removeDirectoryRecursive tmpdir
-	
+			removeDirectoryForCleanup tmpdir
+
 checklink :: FilePath -> Assertion
 checklink f = ifM (annexeval Config.crippledFileSystem)
 	( (isJust <$> annexeval (Annex.Link.getAnnexLinkTarget f))