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, 8 insertions, 5 deletions

diff --git a/third_party/git/t/t7419-submodule-set-branch.sh b/third_party/git/t/t7419-submodule-set-branch.sh
index c4b370ea85..3b925c302f 100755
--- a/third_party/git/t/t7419-submodule-set-branch.sh
+++ b/third_party/git/t/t7419-submodule-set-branch.sh
@@ -34,7 +34,7 @@ test_expect_success 'submodule config cache setup' '
 
 test_expect_success 'ensure submodule branch is unset' '
 	(cd super &&
-		test_must_fail grep branch .gitmodules
+		! grep branch .gitmodules
 	)
 '
 
@@ -52,12 +52,13 @@ test_expect_success 'test submodule set-branch --branch' '
 '
 
 test_expect_success 'test submodule set-branch --default' '
+	test_commit -C submodule c &&
 	(cd super &&
 		git submodule set-branch --default submodule &&
-		test_must_fail grep branch .gitmodules &&
+		! grep branch .gitmodules &&
 		git submodule update --remote &&
 		cat <<-\EOF >expect &&
-		a
+		c
 		EOF
 		git -C submodule show -s --pretty=%s >actual &&
 		test_cmp expect actual
@@ -65,6 +66,7 @@ test_expect_success 'test submodule set-branch --default' '
 '
 
 test_expect_success 'test submodule set-branch -b' '
+	test_commit -C submodule b &&
 	(cd super &&
 		git submodule set-branch -b topic submodule &&
 		grep "branch = topic" .gitmodules &&
@@ -78,12 +80,13 @@ test_expect_success 'test submodule set-branch -b' '
 '
 
 test_expect_success 'test submodule set-branch -d' '
+	test_commit -C submodule d &&
 	(cd super &&
 		git submodule set-branch -d submodule &&
-		test_must_fail grep branch .gitmodules &&
+		! grep branch .gitmodules &&
 		git submodule update --remote &&
 		cat <<-\EOF >expect &&
-		a
+		d
 		EOF
 		git -C submodule show -s --pretty=%s >actual &&
 		test_cmp expect actual