'use strict'
const path = require('path')

function resolve(dir) {
	return path.join(__dirname, dir)
}
const port = process.env.port || process.env.npm_config_port || 9528

module.exports = {
	publicPath: './',
	outputDir: 'dist',
	assetsDir: 'static',
	lintOnSave: process.env.NODE_ENV === 'development',
	productionSourceMap: false,
	devServer: {
		port: port,
		open: true,
		overlay: {
			warnings: false,
			errors: true
		},
		watchOptions: {
			// 只监听项目根目录下的文件（替换为你的项目实际路径）
			// 例如：项目在 D:\data_vue\0708-1\manage-vue-manage_Andy
			cwd: path.resolve(__dirname), // 限制监听范围为当前项目目录
			ignored: [
				'D:/DumpStack.log.tmp',
				'D:/*',
				'**/node_modules',
				'**/.git'
			]
		}
	},
	configureWebpack: {
		resolve: {
			alias: {
				'@': resolve('src')
			}
		}
	},
	chainWebpack(config) {
		config.plugin('preload').tap(() => [{
			rel: 'preload',
			fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
			include: 'initial'
		}])

		config.plugins.delete('prefetch')

		config.module
			.rule('svg')
			.exclude.add(resolve('src/icons'))
			.end()
		config.module
			.rule('icons')
			.test(/\.svg$/)
			.include.add(resolve('src/icons'))
			.end()
			.use('svg-sprite-loader')
			.loader('svg-sprite-loader')
			.end()

		config
			.when(process.env.NODE_ENV !== 'development',
				config => {
					config
						.plugin('ScriptExtHtmlWebpackPlugin')
						.after('html')
						.use('script-ext-html-webpack-plugin', [{
							// `runtime` must same as runtimeChunk name. default is `runtime`
							inline: /runtime\..*\.js$/
						}])
						.end()
					config
						.optimization.splitChunks({
							chunks: 'all',
							cacheGroups: {
								libs: {
									name: 'chunk-libs',
									test: /[\\/]node_modules[\\/]/,
									priority: 10,
									chunks: 'initial' // only package third parties that are initially dependent
								},
								elementUI: {
									name: 'chunk-elementUI', // split elementUI into a single package
									priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
									test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
								},
								commons: {
									name: 'chunk-commons',
									test: resolve('src/components'), // can customize your rules
									minChunks: 3, //  minimum common number
									priority: 5,
									reuseExistingChunk: true
								}
							}
						})
					// https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
					config.optimization.runtimeChunk('single')
				}
			)
	}
}