simplify build config (#638)

build/webpack.build.js

@@ -1,50 +1,29 @@
 const webpack = require('webpack');
 const config = require('./webpack.config.dev.js');
-const isMinify = process.argv.indexOf('-p') !== -1; 
-const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
+const isMinify = process.argv.indexOf('-p') !== -1;
 
-config.entry = {
-  'vant': './packages/index.js'
-};
-
-config.output = {
-  filename: isMinify ? './lib/[name].min.js' : './lib/[name].js',
-  library: 'vant',
-  libraryTarget: 'umd',
-  umdNamedDefine: true
-};
-
-config.externals = {
-  vue: {
-    root: 'Vue',
-    commonjs: 'vue',
-    commonjs2: 'vue',
-    amd: 'vue'
-  }
-};
-
-config.plugins = [
-  new webpack.DefinePlugin({
-    'process.env.NODE_ENV': '"production"'
-  }),
-  new webpack.LoaderOptionsPlugin({
-    minimize: true,
-    debug: false,
-    options: {
-      vue: {
-        autoprefixer: false,
-        preserveWhitespace: false
-      }
+module.exports = Object.assign({}, config, {
+  entry: {
+    'vant': './packages/index.js'
+  },
+  output: {
+    filename: isMinify ? './lib/[name].min.js' : './lib/[name].js',
+    library: 'vant',
+    libraryTarget: 'umd',
+    umdNamedDefine: true
+  },
+  externals: {
+    vue: {
+      root: 'Vue',
+      commonjs: 'vue',
+      commonjs2: 'vue',
+      amd: 'vue'
     }
-  }),
-  new webpack.optimize.ModuleConcatenationPlugin()
-];
-
-// analyze bundle size if need
-// if (isMinify) {
-//   config.plugins.push(new BundleAnalyzerPlugin());
-// }
-
-delete config.devtool;
-
-module.exports = config;
+  },
+  plugins: [
+    new webpack.DefinePlugin({
+      'process.env.NODE_ENV': '"production"'
+    }),
+    new webpack.optimize.ModuleConcatenationPlugin()
+  ]
+});