static int check_one_mergetag(struct commit *commit,
struct commit_extra_header *extra,
void *data)
{
struct check_mergetag_data *mergetag_data = (struct check_mergetag_data *)data;
const char *ref = mergetag_data->argv[0];
struct object_id tag_oid;
struct tag *tag;
int i;
hash_object_file(extra->value, extra->len, type_name(OBJ_TAG), &tag_oid);
tag = lookup_tag(&tag_oid);
if (!tag)
return error(_("bad mergetag in commit '%s'"), ref);
if (parse_tag_buffer(tag, extra->value, extra->len))
return error(_("malformed mergetag in commit '%s'"), ref);
/* iterate over new parents */
for (i = 1; i < mergetag_data->argc; i++) {
struct object_id oid;
if (get_oid(mergetag_data->argv[i], &oid) < 0)
return error(_("Not a valid object name: '%s'"),
mergetag_data->argv[i]);
if (!oidcmp(&tag->tagged->oid, &oid))
return 0; /* found */
}
return error(_("original commit '%s' contains mergetag '%s' that is "
"discarded; use --edit instead of --graft"), ref,
oid_to_hex(&tag_oid));
}
static void show_one_mergetag(struct rev_info *opt,
struct commit_extra_header *extra,
struct commit *commit)
{
unsigned char sha1[20];
struct tag *tag;
struct strbuf verify_message;
int status, nth;
size_t payload_size, gpg_message_offset;
hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), sha1);
tag = lookup_tag(sha1);
if (!tag)
return; /* error message already given */
strbuf_init(&verify_message, 256);
if (parse_tag_buffer(tag, extra->value, extra->len))
strbuf_addstr(&verify_message, "malformed mergetag\n");
else if (is_common_merge(commit) &&
!hashcmp(tag->tagged->sha1,
commit->parents->next->item->object.sha1))
strbuf_addf(&verify_message,
"merged tag '%s'\n", tag->tag);
else if ((nth = which_parent(tag->tagged->sha1, commit)) < 0)
strbuf_addf(&verify_message, "tag %s names a non-parent %s\n",
tag->tag, tag->tagged->sha1);
else
strbuf_addf(&verify_message,
"parent #%d, tagged '%s'\n", nth + 1, tag->tag);
gpg_message_offset = verify_message.len;
payload_size = parse_signature(extra->value, extra->len);
if ((extra->len <= payload_size) ||
(verify_signed_buffer(extra->value, payload_size,
extra->value + payload_size,
extra->len - payload_size,
&verify_message) &&
verify_message.len <= gpg_message_offset)) {
strbuf_addstr(&verify_message, "No signature\n");
status = -1;
}
else if (strstr(verify_message.buf + gpg_message_offset,
": Good signature from "))
status = 0;
else
status = -1;
show_sig_lines(opt, status, verify_message.buf);
strbuf_release(&verify_message);
}
struct object *parse_object_buffer(const struct object_id *oid, enum object_type type, unsigned long size, void *buffer, int *eaten_p)
{
struct object *obj;
*eaten_p = 0;
obj = NULL;
if (type == OBJ_BLOB) {
struct blob *blob = lookup_blob(oid);
if (blob) {
if (parse_blob_buffer(blob, buffer, size))
return NULL;
obj = &blob->object;
}
} else if (type == OBJ_TREE) {
struct tree *tree = lookup_tree(oid);
if (tree) {
obj = &tree->object;
if (!tree->buffer)
tree->object.parsed = 0;
if (!tree->object.parsed) {
if (parse_tree_buffer(tree, buffer, size))
return NULL;
*eaten_p = 1;
}
}
} else if (type == OBJ_COMMIT) {
struct commit *commit = lookup_commit(oid);
if (commit) {
if (parse_commit_buffer(commit, buffer, size))
return NULL;
if (!get_cached_commit_buffer(commit, NULL)) {
set_commit_buffer(commit, buffer, size);
*eaten_p = 1;
}
obj = &commit->object;
}
} else if (type == OBJ_TAG) {
struct tag *tag = lookup_tag(oid);
if (tag) {
if (parse_tag_buffer(tag, buffer, size))
return NULL;
obj = &tag->object;
}
} else {
warning("object %s has unknown type id %d", oid_to_hex(oid), type);
obj = NULL;
}
return obj;
}
static void show_one_mergetag(struct commit *commit,
struct commit_extra_header *extra,
void *data)
{
struct rev_info *opt = (struct rev_info *)data;
unsigned char sha1[20];
struct tag *tag;
struct strbuf verify_message;
int status, nth;
size_t payload_size, gpg_message_offset;
hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), sha1);
tag = lookup_tag(sha1);
if (!tag)
return; /* error message already given */
strbuf_init(&verify_message, 256);
if (parse_tag_buffer(tag, extra->value, extra->len))
strbuf_addstr(&verify_message, "malformed mergetag\n");
else if (is_common_merge(commit) &&
!oidcmp(&tag->tagged->oid,
&commit->parents->next->item->object.oid))
strbuf_addf(&verify_message,
"merged tag '%s'\n", tag->tag);
else if ((nth = which_parent(tag->tagged->oid.hash, commit)) < 0)
strbuf_addf(&verify_message, "tag %s names a non-parent %s\n",
tag->tag, tag->tagged->oid.hash);
else
strbuf_addf(&verify_message,
"parent #%d, tagged '%s'\n", nth + 1, tag->tag);
gpg_message_offset = verify_message.len;
payload_size = parse_signature(extra->value, extra->len);
status = -1;
if (extra->len > payload_size) {
/* could have a good signature */
if (!verify_signed_buffer(extra->value, payload_size,
extra->value + payload_size,
extra->len - payload_size,
&verify_message, NULL))
status = 0; /* good */
else if (verify_message.len <= gpg_message_offset)
strbuf_addstr(&verify_message, "No signature\n");
/* otherwise we couldn't verify, which is shown as bad */
}
show_sig_lines(opt, status, verify_message.buf);
strbuf_release(&verify_message);
}
int parse_tag(struct tag *item)
{
enum object_type type;
void *data;
unsigned long size;
int ret;
if (item->object.parsed)
return 0;
data = read_object_file(&item->object.oid, &type, &size);
if (!data)
return error("Could not read %s",
oid_to_hex(&item->object.oid));
if (type != OBJ_TAG) {
free(data);
return error("Object %s not a tag",
oid_to_hex(&item->object.oid));
}
ret = parse_tag_buffer(item, data, size);
free(data);
return ret;
}
