const CopyWebpackPlugin = require('copy-webpack-plugin');

const HtmlWebpackPlugin = require('html-webpack-plugin')

const path = require('path');

console.log(1111111111111, process.env.NODE_ENV)

module.exports = {

    publicPath: './', //基本路径

    outputDir: 'dist', //输出文件目录

    assetsDir: 'static', //css js 等静态文件目录

    productionSourceMap: false, //生产环境的 source map，默认true

    devServer: {

        host: 'localhost',

        port: 1000,

        open: false,

        // proxy: {

        // '/api': {

        //     target: '<url>',         //代理地址

        //     ws: true,                //允许代理 websockets 协议

        //     changeOrigin: true       //需要虚拟托管的站点要设计为true。建议设为 true，开发时大部分情况都是虚拟托管的站点

        // }

        // }

    },

    configureWebpack: {

        plugins: [

            // new CopyWebpackPlugin([ //vuecli4打包时public文件夹下内容会无改动复制到打包目录

            //     {

            //         from: path.resolve(__dirname, 'static'),

            //         to: path.resolve(__dirname, 'dist'),

            //         ignore: ['.*']

            //     }

            // ]),

            new HtmlWebpackPlugin({

                filename: 'index.html',

                template: (() => {

                    let temp = './public/index.html';

 

                    if (process.env.NODE_ENV === 'development') {

                        temp = './public/index.html'

                    } else if (process.env.NODE_ENV === 'production') {

                        temp = './public/index.pro.html'

                    }

                    return temp

                })(),

                inject: true,

                url: process.env.BASE_URL,

                minify: {

                    removeComments: true,

                    collapseWhitespace: true,

                    removeAttributeQuotes: true

                    // more options:

                    // https://github.com/kangax/html-minifier#options-quick-reference

                },

                // necessary to consistently work with multiple chunks via CommonsChunkPlugin

                chunksSortMode: 'dependency'

            }),

        ],

        // externals: {

        //      /**

        //     *key: main.js中全局引入的路径

        //     *value: 全局暴露出来的对象名

        //     */

        //     // 'vue': 'Vue'

        // },

        externals: [function (context, request, callback) {

            /* 

                开发环境不忽略文件，直接使用本地，避免cdn影响开发效率

            */

           console.log(request)

            if (process.env.NODE_ENV === 'development') {

                return callback();

            } else {

                /* 在此处添加忽略依赖包 */

                if(request === 'vue') {

                    return callback(null,'Vue')

                }

            }

            callback()

        }]

 

    },

}