webpack打包vue項(xiàng)目的js不是所需的export，而是整個(gè)文件

項(xiàng)目vue: 2.5.0 webpack: 3.6.0
打包配置

webpack.base.conf.js

'use strict';
const path = require('path');
const utils = require('./utils');
const vueLoaderConfig = require('./vue-loader.conf');

function resolve (dir) {
  return path.join(__dirname, '..', dir)
}

module.exports = {
  resolve: {
    extensions: ['.js', '.vue', '.json'],
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@': resolve('src'),
    }
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: vueLoaderConfig
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        include: [resolve('src'), resolve('test')]
      },
      {
        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('img/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('media/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
        }
      }
    ]
  }
};

webpack.prod.conf.js

'use strict';
const path = require('path');
const utils = require('./utils');
const webpack = require('webpack');
const config = require('../config');
const merge = require('webpack-merge');
const baseWebpackConfig = require('./webpack.base.conf');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin');

const env = config.build.env;

const webpackConfig = merge(baseWebpackConfig, {
  entry: {
    app: './src/main.js'
  },
  output: {
    path: config.build.assetsRoot,
    filename: utils.assetsPath('[name].js'),
    publicPath: config.build.assetsPublicPath
  },
  module: {
    rules: utils.styleLoaders({
      sourceMap: config.build.productionSourceMap,
      extract: true
    })
  },
  devtool: config.build.productionSourceMap ? '#source-map' : false,
  plugins: [
    new webpack.DefinePlugin({
      'process.env': env
    }),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false
      }
    }),
    new ExtractTextPlugin({
      filename: utils.assetsPath('css/[name].css')
    }),
    new OptimizeCSSPlugin({
      cssProcessorOptions: {
        safe: true
      }
    }),
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.build.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ]
});

if (config.build.productionGzip) {
  const CompressionWebpackPlugin = require('compression-webpack-plugin');

  webpackConfig.plugins.push(
    new CompressionWebpackPlugin({
      asset: '[path].gz[query]',
      algorithm: 'gzip',
      test: new RegExp(
        '\\.(' +
        config.build.productionGzipExtensions.join('|') +
        ')$'
      ),
      threshold: 10240,
      minRatio: 0.8
    })
  )
}

module.exports = webpackConfig;

入口文件:

const install = function(Vue, opts = {}) {

  Object.keys(components).forEach(key => {
    Vue.component(key, components[key]);
  });

  Vue.prototype.$Modal = lanModal;
  Vue.prototype.$Message = lanMessage;
  Vue.prototype.$messageBox = lanMessageBox;
};

if (typeof window !== 'undefined' && window.Vue) {
  install(window.Vue);
};

export default {
  version: '0.0.9',
  install,
  ...components
};

按照上述打包打包出來(lái)的是一個(gè)完整的js文件，但是我想要的是打包出來(lái)是一個(gè)所有組件的對(duì)象，求問(wèn)？打包配置哪里不對(duì)嗎