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, 27 insertions, 0 deletions

diff --git a/third_party/git/t/t3908-stash-in-worktree.sh b/third_party/git/t/t3908-stash-in-worktree.sh
new file mode 100755
index 000000000000..2b2b366ef94b
--- /dev/null
+++ b/third_party/git/t/t3908-stash-in-worktree.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+#
+# Copyright (c) 2019 Johannes E Schindelin
+#
+
+test_description='Test git stash in a worktree'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+	test_commit initial &&
+	git worktree add wt &&
+	test_commit -C wt in-worktree
+'
+
+test_expect_success 'apply in subdirectory' '
+	mkdir wt/subdir &&
+	(
+		cd wt/subdir &&
+		echo modified >../initial.t &&
+		git stash &&
+		git stash apply >out
+	) &&
+	grep "\.\.\/initial\.t" wt/subdir/out
+'
+
+test_done