[PATCH 3/6] git-fsck: Do thorough verification of tag objects.

[Johan Herland <johan@herland.net>]

Teach git-fsck to do the same kind of verification on tag objects that is
already done by git-mktag.

Signed-off-by: Johan Herland <johan@herland.net>
---
 builtin-fsck.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/builtin-fsck.c b/builtin-fsck.c
index cbbcaf0..a8914ae 100644
--- a/builtin-fsck.c
+++ b/builtin-fsck.c
@@ -344,6 +344,20 @@ static int fsck_commit(struct commit *commit)
 static int fsck_tag(struct tag *tag)
 {
 	struct object *tagged = tag->tagged;
+	enum object_type type;
+	unsigned long size;
+	char *data = (char *) read_sha1_file(tag->object.sha1, &type, &size);
+	if (!data)
+		return error("Could not read tag %s", sha1_to_hex(tag->object.sha1));
+	if (type != OBJ_TAG) {
+		free(data);
+		return error("Internal error: Tag %s not a tag", sha1_to_hex(tag->object.sha1));
+	}
+	if (parse_and_verify_tag_buffer(0, data, size, 1)) { /* Thoroughly verify tag object */
+		free(data);
+		return error("Tag %s failed thorough tag object verification", sha1_to_hex(tag->object.sha1));
+	}
+	free(data);
 
 	if (!tagged) {
 		return objerror(&tag->object, "could not load tagged object");
-- 
1.5.2