// Copyright 2021-2024 Buf Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
 * Hydrate an extension descriptor.
 *
 * @private
 */
export function extDesc(file, path, ...paths) {
    if (paths.length == 0) {
        return file.extensions[path];
    }
    const e = paths.pop(); // we checked length above
    return paths.reduce((acc, cur) => acc.nestedMessages[cur], file.messages[path]).nestedExtensions[e];
}