notes: fix minimum number of parameters to "copy" subcommand

The builtin/notes.c::copy() function is prepared to handle either
one or two arguments given from the command line; when one argument
is given, to-obj defaults to HEAD.

bbb1b8a3 ("notes: check number of parameters to "git notes copy"",
2010-06-28) tried to make sure "git notes copy" (with *no* other
argument) does not dereference NULL by checking the number of
parameters, but it incorrectly insisted that we need two arguments,
instead of either one or two.  This disabled the defaulting to-obj
to HEAD.

Correct it.

Signed-off-by: Doan Tran Cong Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 38 insertions, 2 deletions

diff --git a/t/t3301-notes.sh b/t/t3301-notes.sh
index d7767e4438..d66a5f6faa 100755
--- a/t/t3301-notes.sh
+++ b/t/t3301-notes.sh
@@ -864,6 +864,24 @@ test_expect_success 'append to note from other note with "git notes append -c"'
 '
 
 test_expect_success 'copy note with "git notes copy"' '
+	commit=$(git rev-parse 4th) &&
+	cat >expect <<-EOF &&
+		commit $commit
+		Author: A U Thor <author@example.com>
+		Date:   Thu Apr 7 15:16:13 2005 -0700
+
+		${indent}4th
+
+		Notes:
+		${indent}This is a blob object
+	EOF
+	git notes copy 8th 4th &&
+	git log 3rd..4th >actual &&
+	test_cmp expect actual &&
+	test "$(git note list 4th)" = "$(git note list 8th)"
+'
+
+test_expect_success 'copy note with "git notes copy" with default' '
 	test_commit 11th &&
 	commit=$(git rev-parse HEAD) &&
 	cat >expect <<-EOF &&
@@ -878,7 +896,7 @@ test_expect_success 'copy note with "git notes copy"' '
 		${indent}
 		${indent}yet another note
 	EOF
-	git notes copy HEAD^ HEAD &&
+	git notes copy HEAD^ &&
 	git log -1 >actual &&
 	test_cmp expect actual &&
 	test "$(git notes list HEAD)" = "$(git notes list HEAD^)"
@@ -901,11 +919,29 @@ test_expect_success 'allow overwrite with "git notes copy -f"' '
 		${indent}11th
 
 		Notes:
+		${indent}This is a blob object
+	EOF
+	git notes copy -f HEAD~3 HEAD &&
+	git log -1 >actual &&
+	test_cmp expect actual &&
+	test "$(git notes list HEAD)" = "$(git notes list HEAD~3)"
+'
+
+test_expect_success 'allow overwrite with "git notes copy -f" with default' '
+	commit=$(git rev-parse HEAD) &&
+	cat >expect <<-EOF &&
+		commit $commit
+		Author: A U Thor <author@example.com>
+		Date:   Thu Apr 7 15:23:13 2005 -0700
+
+		${indent}11th
+
+		Notes:
 		${indent}yet another note
 		${indent}
 		${indent}yet another note
 	EOF
-	git notes copy -f HEAD~2 HEAD &&
+	git notes copy -f HEAD~2 &&
 	git log -1 >actual &&
 	test_cmp expect actual &&
 	test "$(git notes list HEAD)" = "$(git notes list HEAD~2)"