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, 18 insertions, 1 deletions

diff --git a/third_party/git/t/t7001-mv.sh b/third_party/git/t/t7001-mv.sh
index 36b50d0b4c..63d5f41a12 100755
--- a/third_party/git/t/t7001-mv.sh
+++ b/third_party/git/t/t7001-mv.sh
@@ -177,7 +177,7 @@ test_expect_success "Sergey Vlasov's test case" '
 	date >ab.c &&
 	date >ab/d &&
 	git add ab.c ab &&
-	git commit -m 'initial' &&
+	git commit -m "initial" &&
 	git mv ab a
 '
 
@@ -248,6 +248,23 @@ test_expect_success 'git mv should not change sha1 of moved cache entry' '
 
 rm -f dirty dirty2
 
+# NB: This test is about the error message
+# as well as the failure.
+test_expect_success 'git mv error on conflicted file' '
+	rm -fr .git &&
+	git init &&
+	>conflict &&
+	test_when_finished "rm -f conflict" &&
+	cfhash=$(git hash-object -w conflict) &&
+	q_to_tab <<-EOF | git update-index --index-info &&
+	0 $cfhash 0Qconflict
+	100644 $cfhash 1Qconflict
+	EOF
+
+	test_must_fail git mv conflict newname 2>actual &&
+	test_i18ngrep "conflicted" actual
+'
+
 test_expect_success 'git mv should overwrite symlink to a file' '
 
 	rm -fr .git &&