fix(mp): build components with webpack5

packages/vue-cli-plugin-uni/lib/mp/index.js

@@ -169,6 +169,10 @@ module.exports = {
 
     webpackConfig.optimization.splitChunks = require('../split-chunks')()
 
+    if (webpack.version[0] > 4) {
+      webpackConfig.optimization.chunkIds = 'named'
+    }
+
     parseEntry()
 
     const statCode = getPlatformStat()
@@ -330,6 +334,11 @@ ${globalEnv}.__webpack_require_UNI_MP_PLUGIN__ = __webpack_require__;`
       }
     }
 
+    if (process.env.NODE_ENV === 'production' && webpack.version[0] > 4) {
+      // 暂时禁用，否则导致 provide 被压缩和裁剪
+      webpackConfig.optimization.usedExports(false)
+    }
+
     if (process.env.UNI_SUBPACKGE || process.env.UNI_MP_PLUGIN) {
       initSubpackageConfig(webpackConfig, vueOptions)
     }

packages/webpack-uni-mp-loader/lib/plugin/generate-component.js

@@ -70,7 +70,11 @@ module.exports = function generateComponent (compilation, jsonpFunction = 'webpa
     const modules = compilation.modules
 
     const concatenatedModules = modules.filter(module => module.modules)
-    const uniModuleId = modules.find(module => module.resource && normalizePath(module.resource) === uniPath).id
+    let uniModule = modules.find(module => module.resource && normalizePath(module.resource) === uniPath)
+    if (!uniModule && webpack.version[0] > 4) {
+      uniModule = modules.find(module => module.rootModule && module.rootModule.resource && normalizePath(module.rootModule.resource) === uniPath)
+    }
+    const uniModuleId = uniModule.id
     const styleImports = {}
     const fixSlots = {}
     const vueOuterComponentSting = 'vueOuterComponents'