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, 71 insertions, 0 deletions

diff --git a/third_party/git/t/t3435-rebase-gpg-sign.sh b/third_party/git/t/t3435-rebase-gpg-sign.sh
new file mode 100755
index 000000000000..b47c59c190b3
--- /dev/null
+++ b/third_party/git/t/t3435-rebase-gpg-sign.sh
@@ -0,0 +1,71 @@
+#!/bin/sh
+#
+# Copyright (c) 2020 Doan Tran Cong Danh
+#
+
+test_description='test rebase --[no-]gpg-sign'
+
+. ./test-lib.sh
+. "$TEST_DIRECTORY/lib-rebase.sh"
+. "$TEST_DIRECTORY/lib-gpg.sh"
+
+if ! test_have_prereq GPG
+then
+	skip_all='skip all test rebase --[no-]gpg-sign, gpg not available'
+	test_done
+fi
+
+test_rebase_gpg_sign () {
+	local must_fail= will=will fake_editor=
+	if test "x$1" = "x!"
+	then
+		must_fail=test_must_fail
+		will="won't"
+		shift
+	fi
+	conf=$1
+	shift
+	test_expect_success "rebase $* with commit.gpgsign=$conf $will sign commit" "
+		git reset two &&
+		git config commit.gpgsign $conf &&
+		set_fake_editor &&
+		FAKE_LINES='r 1 p 2' git rebase --force-rebase --root $* &&
+		$must_fail git verify-commit HEAD^ &&
+		$must_fail git verify-commit HEAD
+	"
+}
+
+test_expect_success 'setup' '
+	test_commit one &&
+	test_commit two &&
+	test_must_fail git verify-commit HEAD &&
+	test_must_fail git verify-commit HEAD^
+'
+
+test_expect_success 'setup: merge commit' '
+	test_commit fork-point &&
+	git switch -c side &&
+	test_commit three &&
+	git switch master &&
+	git merge --no-ff side &&
+	git tag merged
+'
+
+test_rebase_gpg_sign ! false
+test_rebase_gpg_sign   true
+test_rebase_gpg_sign ! true  --no-gpg-sign
+test_rebase_gpg_sign ! true  --gpg-sign --no-gpg-sign
+test_rebase_gpg_sign   false --no-gpg-sign --gpg-sign
+test_rebase_gpg_sign   true  -i
+test_rebase_gpg_sign ! true  -i --no-gpg-sign
+test_rebase_gpg_sign ! true  -i --gpg-sign --no-gpg-sign
+test_rebase_gpg_sign   false -i --no-gpg-sign --gpg-sign
+
+test_expect_failure 'rebase -p --no-gpg-sign override commit.gpgsign' '
+	git reset --hard merged &&
+	git config commit.gpgsign true &&
+	git rebase -p --no-gpg-sign --onto=one fork-point master &&
+	test_must_fail git verify-commit HEAD
+'
+
+test_done