unify exception handling into Utility.Exception

Removed old extensible-exceptions, only needed for very old ghc.

Made webdav use Utility.Exception, to work after some changes in DAV's
exception handling.

Removed Annex.Exception. Mostly this was trivial, but note that
tryAnnex is replaced with tryNonAsync and catchAnnex replaced with
catchNonAsync. In theory that could be a behavior change, since the former
caught all exceptions, and the latter don't catch async exceptions.

However, in practice, nothing in the Annex monad uses async exceptions.
Grepping for throwTo and killThread only find stuff in the assistant,
which does not seem related.

Command.Add.undo is changed to accept a SomeException, and things
that use it for rollback now catch non-async exceptions, rather than
only IOExceptions.

1 files changed, 2 insertions, 5 deletions

diff --git a/Command/Indirect.hs b/Command/Indirect.hs
index 4ce4c2c38..e146f13b7 100644
--- a/Command/Indirect.hs
+++ b/Command/Indirect.hs
@@ -7,8 +7,6 @@
 
 module Command.Indirect where
 
-import Control.Exception.Extensible
-
 import Common.Annex
 import Command
 import qualified Git
@@ -21,7 +19,6 @@ import Annex.Direct
 import Annex.Content
 import Annex.Content.Direct
 import Annex.CatFile
-import Annex.Exception
 import Annex.Init
 import qualified Command.Add
 
@@ -88,12 +85,12 @@ perform = do
 		removeInodeCache k
 		removeAssociatedFiles k
 		whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do
-			v <-tryAnnexIO (moveAnnex k f)
+			v <- tryNonAsync (moveAnnex k f)
 			case v of
 				Right _ -> do 
 					l <- inRepo $ gitAnnexLink f k
 					liftIO $ createSymbolicLink l f
-				Left e -> catchAnnex (Command.Add.undo f k e)
+				Left e -> catchNonAsync (Command.Add.undo f k e)
 					warnlocked
 		showEndOk