feat(vue-cli-plugin-hbuilderx): nvue support webpack5

packages/vue-cli-plugin-hbuilderx/build/css-loader.conf.js

 const fs = require('fs')
 const path = require('path')
+const webpack = require('webpack')
 
 const {
   getPlatformScss,
@@ -20,12 +21,10 @@ const preprocessLoader = {
   options: nvueCssPreprocessOptions
 }
 
-const postcssLoader = {
-  loader: 'postcss-loader',
-  options: {
-    sourceMap: false,
-    parser: require('postcss-comment'),
-    plugins: [
+const options = {
+  sourceMap: false
+}
+const plugins = [
   require('postcss-import')({
     resolve (id, basedir, importOptions) {
       if (id.startsWith('~@/')) {
@@ -39,8 +38,16 @@ const postcssLoader = {
     }
   }),
   require('@dcloudio/vue-cli-plugin-uni/packages/postcss')
-    ]
-  }
+]
+if (webpack.version[0] > 4) {
+  options.postcssOptions = { plugins }
+} else {
+  options.parser = require('postcss-comment')
+  options.plugins = plugins
+}
+const postcssLoader = {
+  loader: 'postcss-loader',
+  options
 }
 
 // sass 全局变量

packages/vue-cli-plugin-hbuilderx/build/webpack.nvue.conf.js

@@ -208,7 +208,7 @@ if (process.env.UNI_USING_V3_NATIVE) {
         return ''
       }
     }]))
-  } catch (e) {}
+  } catch (e) { }
 }
 
 if (process.env.UNI_USING_NATIVE || process.env.UNI_USING_V3_NATIVE) {
@@ -305,7 +305,7 @@ try {
       dir: process.env.UNI_INPUT_DIR
     }))
   }
-} catch (e) {}
+} catch (e) { }
 
 module.exports = function () {
   return {
@@ -322,8 +322,7 @@ module.exports = function () {
     performance: {
       hints: false
     },
-    optimization: {
-      namedModules: false,
+    optimization: Object.assign({
       minimizer: [
         new TerserPlugin({
           terserOptions: {
@@ -333,7 +332,7 @@ module.exports = function () {
           }
         })
       ]
-    },
+    }, webpack.version[0] > 4 ? {} : { namedModules: false }),
     output: {
       path: process.env.UNI_OUTPUT_DIR,
       filename: '[name].js'
@@ -377,7 +376,7 @@ module.exports = function () {
       reasons: true,
       errorDetails: true
     },
-    node: {
+    node: webpack.version[0] > 4 ? false : {
       global: false,
       Buffer: false,
       __filename: false,