Fix test suite failure when git-annex test is not run inside a git repository

Not the first time this kind of test suite breakage has happened..
It would be good to avoid somehow it looking up from .t and finding a git
repo. But just running the test suite from time to time outside of
git-annex would also let me notice these before the distribution packagers
do.

This commit was sponsored by mo on Patreon.

CHANGELOG

@@ -1,5 +1,7 @@
 git-annex (7.20181032) UNRELEASED; urgency=medium
 
+  * Fix test suite failure when git-annex test is not run inside a git
+    repository.
   * Increase minimum QuickCheck version.
   * Fix a P2P protocol hang.
   * importfeed: Avoid erroring out when a feed has been repeatedly broken,

Test.hs

@@ -60,7 +60,6 @@ import qualified Annex.WorkTree
 import qualified Annex.Init
 import qualified Annex.CatFile
 import qualified Annex.Path
-import qualified Annex.AdjustedBranch
 import qualified Annex.VectorClock
 import qualified Annex.View
 import qualified Annex.View.ViewedFile
@@ -1100,9 +1099,9 @@ test_conflict_resolution =
 
 {- Conflict resolution while in an adjusted branch. -}
 test_conflict_resolution_adjusted_branch :: Assertion
-test_conflict_resolution_adjusted_branch = whenM (annexeval Annex.AdjustedBranch.isSupported) $
+test_conflict_resolution_adjusted_branch =
 	withtmpclonerepo $ \r1 ->
-		withtmpclonerepo $ \r2 -> do
+		withtmpclonerepo $ \r2 -> whenM (adjustedbranchsupported r2) $ do
 			indir r1 $ do
 				disconnectOrigin
 				writecontent conflictor "conflictor1"
@@ -1449,9 +1448,9 @@ test_mixed_lock_conflict_resolution =
  - where the same file is added to both independently. The bad merge
  - emptied the whole tree. -}
 test_adjusted_branch_merge_regression :: Assertion
-test_adjusted_branch_merge_regression = whenM (annexeval Annex.AdjustedBranch.isSupported) $
+test_adjusted_branch_merge_regression = do
 	withtmpclonerepo $ \r1 ->
-		withtmpclonerepo $ \r2 -> do
+		withtmpclonerepo $ \r2 -> whenM (adjustedbranchsupported r1) $ do
 			pair r1 r2
 			setup r1
 			setup r2
@@ -1476,8 +1475,7 @@ test_adjusted_branch_merge_regression = whenM (annexeval Annex.AdjustedBranch.is
  - a subtree to an existing tree lost files. -}
 test_adjusted_branch_subtree_regression :: Assertion
 test_adjusted_branch_subtree_regression = 
-	whenM (annexeval Annex.AdjustedBranch.isSupported) $ 
+	withtmpclonerepo $ \r -> whenM (adjustedbranchsupported r) $ do
-		withtmpclonerepo $ \r -> do
 		indir r $ do
 			disconnectOrigin
 			git_annex "upgrade" [] @? "upgrade failed"

Test/Framework.hs

@@ -35,6 +35,7 @@ import qualified Annex.Link
 import qualified Annex.Init
 import qualified Annex.Path
 import qualified Annex.Action
+import qualified Annex.AdjustedBranch
 import qualified Utility.Process
 import qualified Utility.Env
 import qualified Utility.Env.Set
@@ -160,18 +161,23 @@ disconnectOrigin = boolSystem "git" [Param "remote", Param "rm", Param "origin"]
 withgitrepo :: (FilePath -> Assertion) -> Assertion
 withgitrepo = bracket (setuprepo mainrepodir) return
 
-indir :: FilePath -> Assertion -> Assertion
+indir :: FilePath -> IO a -> IO a
 indir dir a = do
 	currdir <- getCurrentDirectory
 	-- Assertion failures throw non-IO errors; catch
 	-- any type of error and change back to currdir before
 	-- rethrowing.
-	r <- bracket_ (changeToTmpDir dir) (setCurrentDirectory currdir)
+	r <- bracket_
-		(try a::IO (Either SomeException ()))
+		(changeToTmpDir dir)
+		(setCurrentDirectory currdir)
+		(tryNonAsync a)
 	case r of
-		Right () -> return ()
+		Right v -> return v
 		Left e -> throwM e
 
+adjustedbranchsupported :: FilePath -> IO Bool
+adjustedbranchsupported repo = indir repo $ annexeval Annex.AdjustedBranch.isSupported
+
 setuprepo :: FilePath -> IO FilePath
 setuprepo dir = do
 	cleanup dir