const path = require("path");
const CopywebpackPlugin = require("copy-webpack-plugin");
const dvgisDist = "./node_modules/@dvgis";

//减少chunk-vendors.js文件大小
// const webpack = require("webpack");
// const CompressionWebpackPlugin = require("compression-webpack-plugin");
// const productionGzipExtensions = ["js", "css"];
// const isProduction = process.env.NODE_ENV === "production";

module.exports = {
  publicPath: "/",
  lintOnSave: false,

  // 其他配置
  chainWebpack: (config) => {
    config.plugin("copy").use(CopywebpackPlugin, [
      [
        {
          from: path.join(dvgisDist, "dc-sdk/dist/resources"),
          to: "libs/dc-sdk/resources",
        },
        {
          from: "./public/img",
          to: "img",
        },
        {
          from: "./public/examples",
          to: "examples",
        },
        {
          from: "./public/mx",
          to: "mx",
        },
        {
          from: "./public/wp",
          to: "wp",
        },
      ],
    ]);
  },
  //减少chunk-vendors.js文件大小  报错 TypeError: Cannot read property 'tapPromise' of undefined
  //   configureWebpack: {
  //     resolve: {
  //       alias: {
  //         "@": path.resolve(__dirname, "./src"),
  //         "@i": path.resolve(__dirname, "./src/assets"),
  //       },
  //     },
  //     plugins: [
  //       new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),

  //       // 下面是下载的插件的配置
  //       new CompressionWebpackPlugin({
  //         algorithm: "gzip",
  //         test: new RegExp("\\.(" + productionGzipExtensions.join("|") + ")$"),
  //         threshold: 10240,
  //         minRatio: 0.8,
  //       }),
  //       new webpack.optimize.LimitChunkCountPlugin({
  //         maxChunks: 5,
  //         minChunkSize: 100,
  //       }),
  //     ],
  //   },
};