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, 16 insertions, 10 deletions

diff --git a/third_party/git/t/t1011-read-tree-sparse-checkout.sh b/third_party/git/t/t1011-read-tree-sparse-checkout.sh
index ba71b159ba8c..140f45997736 100755
--- a/third_party/git/t/t1011-read-tree-sparse-checkout.sh
+++ b/third_party/git/t/t1011-read-tree-sparse-checkout.sh
@@ -74,13 +74,19 @@ test_expect_success 'read-tree --no-sparse-checkout with empty .git/info/sparse-
 test_expect_success 'read-tree with empty .git/info/sparse-checkout' '
 	git config core.sparsecheckout true &&
 	echo >.git/info/sparse-checkout &&
-	read_tree_u_must_fail -m -u HEAD &&
+	read_tree_u_must_succeed -m -u HEAD &&
 	git ls-files --stage >result &&
 	test_cmp expected result &&
 	git ls-files -t >result &&
+	cat >expected.swt <<-\EOF &&
+	S init.t
+	S sub/added
+	S sub/addedtoo
+	S subsub/added
+	EOF
 	test_cmp expected.swt result &&
-	test -f init.t &&
-	test -f sub/added
+	! test -f init.t &&
+	! test -f sub/added
 '
 
 test_expect_success 'match directories with trailing slash' '
@@ -215,7 +221,6 @@ test_expect_success 'read-tree adds to worktree, dirty case' '
 '
 
 test_expect_success 'index removal and worktree narrowing at the same time' '
-	>empty &&
 	echo init.t >.git/info/sparse-checkout &&
 	echo sub/added >>.git/info/sparse-checkout &&
 	git checkout -f top &&
@@ -223,7 +228,7 @@ test_expect_success 'index removal and worktree narrowing at the same time' '
 	git checkout removed &&
 	git ls-files sub/added >result &&
 	test ! -f sub/added &&
-	test_cmp empty result
+	test_must_be_empty result
 '
 
 test_expect_success 'read-tree --reset removes outside worktree' '
@@ -234,18 +239,19 @@ test_expect_success 'read-tree --reset removes outside worktree' '
 	test_must_be_empty result
 '
 
-test_expect_success 'print errors when failed to update worktree' '
+test_expect_success 'print warnings when some worktree updates disabled' '
 	echo sub >.git/info/sparse-checkout &&
 	git checkout -f init &&
 	mkdir sub &&
 	touch sub/added sub/addedtoo &&
-	test_must_fail git checkout top 2>actual &&
+	# Use -q to suppress "Previous HEAD position" and "Head is now at" msgs
+	git checkout -q top 2>actual &&
 	cat >expected <<\EOF &&
-error: The following untracked working tree files would be overwritten by checkout:
+warning: The following paths were already present and thus not updated despite sparse patterns:
 	sub/added
 	sub/addedtoo
-Please move or remove them before you switch branches.
-Aborting
+
+After fixing the above paths, you may want to run `git sparse-checkout reapply`.
 EOF
 	test_i18ncmp expected actual
 '