[PATCH 3/4] notes: refuse to edit non-blobs

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 builtin/notes.c  |    6 ++++--
 t/t3301-notes.sh |    4 ++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/builtin/notes.c b/builtin/notes.c
index 2960535..44fb8b6 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -109,12 +109,14 @@ static int list_each_note(const unsigned char *object_sha1,
 	return 0;
 }
 
-static void write_note_data(int fd, const unsigned char *sha1)
+static void write_note_blob(int fd, const unsigned char *sha1)
 {
 	unsigned long size;
 	enum object_type type;
 	char *buf = read_sha1_file(sha1, &type, &size);
 	if (buf) {
+		if (type != OBJ_BLOB)
+			die(_("note %s is not a blob"), sha1_to_hex(sha1));
 		if (size)
 			write_or_die(fd, buf, size);
 		free(buf);
@@ -178,7 +180,7 @@ static void create_note(const unsigned char *object, struct msg_arg *msg,
 		if (msg->given)
 			write_or_die(fd, msg->buf.buf, msg->buf.len);
 		else if (prev && !append_only)
-			write_note_data(fd, prev);
+			write_note_blob(fd, prev);
 		write_or_die(fd, note_template, strlen(note_template));
 
 		write_commented_object(fd, object);
diff --git a/t/t3301-notes.sh b/t/t3301-notes.sh
index add13bc..9104bf0 100755
--- a/t/t3301-notes.sh
+++ b/t/t3301-notes.sh
@@ -1236,4 +1236,8 @@ test_expect_success 'non-blobs notes are shown in human-readable form' '
 	test_cmp expected actual
 '
 
+test_expect_success 'cannot edit non-blob notes' '
+	EDITOR=cat test_must_fail git notes edit
+'
+
 test_done
-- 
1.7.8.36.g69ee2