merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/t/t3426-rebase-submodule.sh

@@ -0,0 +1,60 @@
+#!/bin/sh
+
+test_description='rebase can handle submodules'
+
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-submodule-update.sh
+. "$TEST_DIRECTORY"/lib-rebase.sh
+
+git_rebase () {
+	git status -su >expect &&
+	ls -1pR * >>expect &&
+	git checkout -b ours HEAD &&
+	echo x >>file1 &&
+	git add file1 &&
+	git commit -m add_x &&
+	git revert HEAD &&
+	git status -su >actual &&
+	ls -1pR * >>actual &&
+	test_cmp expect actual &&
+	git rebase "$1"
+}
+
+test_submodule_switch "git_rebase"
+
+git_rebase_interactive () {
+	git status -su >expect &&
+	ls -1pR * >>expect &&
+	git checkout -b ours HEAD &&
+	echo x >>file1 &&
+	git add file1 &&
+	git commit -m add_x &&
+	git revert HEAD &&
+	git status -su >actual &&
+	ls -1pR * >>actual &&
+	test_cmp expect actual &&
+	set_fake_editor &&
+	echo "fake-editor.sh" >.git/info/exclude &&
+	git rebase -i "$1"
+}
+
+test_submodule_switch "git_rebase_interactive"
+
+test_expect_success 'rebase interactive ignores modified submodules' '
+	test_when_finished "rm -rf super sub" &&
+	git init sub &&
+	git -C sub commit --allow-empty -m "Initial commit" &&
+	git init super &&
+	git -C super submodule add ../sub &&
+	git -C super config submodule.sub.ignore dirty &&
+	>super/foo &&
+	git -C super add foo &&
+	git -C super commit -m "Initial commit" &&
+	test_commit -C super a &&
+	test_commit -C super b &&
+	test_commit -C super/sub c &&
+	set_fake_editor &&
+	git -C super rebase -i HEAD^^
+'
+
+test_done