Ejemplo n.º 1
0
struct git_istream *open_istream(const unsigned char *sha1,
				 enum object_type *type,
				 unsigned long *size,
				 struct stream_filter *filter)
{
	struct git_istream *st;
	struct object_info oi = {0};
	const unsigned char *real = lookup_replace_object(sha1);
	enum input_source src = istream_source(real, type, &oi);

	if (src < 0)
		return NULL;

	st = xmalloc(sizeof(*st));
	if (open_istream_tbl[src](st, &oi, real, type)) {
		if (open_istream_incore(st, &oi, real, type)) {
			free(st);
			return NULL;
		}
	}
	if (filter) {
		/* Add "&& !is_null_stream_filter(filter)" for performance */
		struct git_istream *nst = attach_stream_filter(st, filter);
		if (!nst)
			close_istream(st);
		st = nst;
	}

	*size = st->size;
	return st;
}
Ejemplo n.º 2
0
/*
 * We refuse to tag something we can't verify. Just because.
 */
static int verify_object(const struct object_id *oid, const char *expected_type)
{
	int ret = -1;
	enum object_type type;
	unsigned long size;
	void *buffer = read_object_file(oid, &type, &size);
	const struct object_id *repl = lookup_replace_object(the_repository, oid);

	if (buffer) {
		if (type == type_from_string(expected_type))
			ret = check_object_signature(repl, buffer, size, expected_type);
		free(buffer);
	}
	return ret;
}
Ejemplo n.º 3
0
struct object *parse_object(const struct object_id *oid)
{
	unsigned long size;
	enum object_type type;
	int eaten;
	const struct object_id *repl = lookup_replace_object(the_repository, oid);
	void *buffer;
	struct object *obj;

	obj = lookup_object(oid->hash);
	if (obj && obj->parsed)
		return obj;

	if ((obj && obj->type == OBJ_BLOB && has_object_file(oid)) ||
	    (!obj && has_object_file(oid) &&
	     oid_object_info(the_repository, oid, NULL) == OBJ_BLOB)) {
		if (check_object_signature(repl, NULL, 0, NULL) < 0) {
			error("sha1 mismatch %s", oid_to_hex(oid));
			return NULL;
		}
		parse_blob_buffer(lookup_blob(oid), NULL, 0);
		return lookup_object(oid->hash);
	}

	buffer = read_object_file(oid, &type, &size);
	if (buffer) {
		if (check_object_signature(repl, buffer, size, type_name(type)) < 0) {
			free(buffer);
			error("sha1 mismatch %s", oid_to_hex(repl));
			return NULL;
		}

		obj = parse_object_buffer(oid, type, size, buffer, &eaten);
		if (!eaten)
			free(buffer);
		return obj;
	}
	return NULL;
}
Ejemplo n.º 4
0
static void verify_one(struct repository *r,
		       struct index_state *istate,
		       struct cache_tree *it,
		       struct strbuf *path)
{
	int i, pos, len = path->len;
	struct strbuf tree_buf = STRBUF_INIT;
	struct object_id new_oid;

	for (i = 0; i < it->subtree_nr; i++) {
		strbuf_addf(path, "%s/", it->down[i]->name);
		verify_one(r, istate, it->down[i]->cache_tree, path);
		strbuf_setlen(path, len);
	}

	if (it->entry_count < 0 ||
	    /* no verification on tests (t7003) that replace trees */
	    lookup_replace_object(r, &it->oid) != &it->oid)
		return;

	if (path->len) {
		pos = index_name_pos(istate, path->buf, path->len);
		pos = -pos - 1;
	} else {
		pos = 0;
	}

	i = 0;
	while (i < it->entry_count) {
		struct cache_entry *ce = istate->cache[pos + i];
		const char *slash;
		struct cache_tree_sub *sub = NULL;
		const struct object_id *oid;
		const char *name;
		unsigned mode;
		int entlen;

		if (ce->ce_flags & (CE_STAGEMASK | CE_INTENT_TO_ADD | CE_REMOVE))
			BUG("%s with flags 0x%x should not be in cache-tree",
			    ce->name, ce->ce_flags);
		name = ce->name + path->len;
		slash = strchr(name, '/');
		if (slash) {
			entlen = slash - name;
			sub = find_subtree(it, ce->name + path->len, entlen, 0);
			if (!sub || sub->cache_tree->entry_count < 0)
				BUG("bad subtree '%.*s'", entlen, name);
			oid = &sub->cache_tree->oid;
			mode = S_IFDIR;
			i += sub->cache_tree->entry_count;
		} else {
			oid = &ce->oid;
			mode = ce->ce_mode;
			entlen = ce_namelen(ce) - path->len;
			i++;
		}
		strbuf_addf(&tree_buf, "%o %.*s%c", mode, entlen, name, '\0');
		strbuf_add(&tree_buf, oid->hash, the_hash_algo->rawsz);
	}
	hash_object_file(tree_buf.buf, tree_buf.len, tree_type, &new_oid);
	if (!oideq(&new_oid, &it->oid))
		BUG("cache-tree for path %.*s does not match. "
		    "Expected %s got %s", len, path->buf,
		    oid_to_hex(&new_oid), oid_to_hex(&it->oid));
	strbuf_setlen(path, len);
	strbuf_release(&tree_buf);
}