merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 29 insertions, 7 deletions

diff --git a/third_party/git/t/t5310-pack-bitmaps.sh b/third_party/git/t/t5310-pack-bitmaps.sh
index 6640329ebf60..8318781d2bbf 100755
--- a/third_party/git/t/t5310-pack-bitmaps.sh
+++ b/third_party/git/t/t5310-pack-bitmaps.sh
@@ -74,16 +74,24 @@ rev_list_tests() {
 		test_cmp expect actual
 	'
 
-	test_expect_success "enumerate --objects ($state)" '
-		git rev-list --objects --use-bitmap-index HEAD >tmp &&
-		cut -d" " -f1 <tmp >tmp2 &&
-		sort <tmp2 >actual &&
-		git rev-list --objects HEAD >tmp &&
-		cut -d" " -f1 <tmp >tmp2 &&
-		sort <tmp2 >expect &&
+	test_expect_success "counting objects via bitmap ($state)" '
+		git rev-list --count --objects HEAD >expect &&
+		git rev-list --use-bitmap-index --count --objects HEAD >actual &&
 		test_cmp expect actual
 	'
 
+	test_expect_success "enumerate commits ($state)" '
+		git rev-list --use-bitmap-index HEAD >actual &&
+		git rev-list HEAD >expect &&
+		test_bitmap_traversal --no-confirm-bitmaps expect actual
+	'
+
+	test_expect_success "enumerate --objects ($state)" '
+		git rev-list --objects --use-bitmap-index HEAD >actual &&
+		git rev-list --objects HEAD >expect &&
+		test_bitmap_traversal expect actual
+	'
+
 	test_expect_success "bitmap --objects handles non-commit objects ($state)" '
 		git rev-list --objects --use-bitmap-index HEAD tagged-blob >actual &&
 		grep $blob actual
@@ -99,6 +107,20 @@ test_expect_success 'clone from bitmapped repository' '
 	test_cmp expect actual
 '
 
+test_expect_success 'partial clone from bitmapped repository' '
+	test_config uploadpack.allowfilter true &&
+	git clone --no-local --bare --filter=blob:none . partial-clone.git &&
+	(
+		cd partial-clone.git &&
+		pack=$(echo objects/pack/*.pack) &&
+		git verify-pack -v "$pack" >have &&
+		awk "/blob/ { print \$1 }" <have >blobs &&
+		# we expect this single blob because of the direct ref
+		git rev-parse refs/tags/tagged-blob >expect &&
+		test_cmp expect blobs
+	)
+'
+
 test_expect_success 'setup further non-bitmapped commits' '
 	test_commit_bulk --id=further 10
 '