Webpack：关于

以下配置有效，但我有理由从项目根目录移动webpack配置。结果，__dirname值将改变，我需要转向__dirname的上限。怎么做？

const output_path = isDevelopment ? (__dirname + '/development/devBuild') : (__dirname + '/public');

module.exports = {

    entry: {
        'open/js/testOpenEntryPoint': './development/source/open/es6/testOpenEntryPoint',
        'admin/js/testAdminEntryPoint': './development/source/admin/es6/testAdminEntryPoint'
    }

    output: {
        path: output_path,
        filename: '[name].js'
    },

    // ...
}

const projectRootDirectory = __dirname + '/../../..';
const output_path = options.isDevelopment ? (projectRootDirectory + '/development/devBuild') : (projectRootDirectory + '/public');

会做。