feat: support babel default config

Author: hubcarl

config/.babelrc

@@ -0,0 +1,17 @@
+{
+  "presets": [
+    ["env", {
+      "modules": false,
+      "targets": {
+        "browsers": ["last 2 versions", "safari >= 7"]
+      }
+    }]
+  ],
+  "plugins": [
+    "transform-object-rest-spread",
+    "syntax-dynamic-import",
+    "transform-object-assign",
+    "transform-runtime"
+  ],
+  "comments": false
+}

config/babelrc.js

@@ -285,7 +285,7 @@ class WebpackBaseBuilder extends Config {
     if (this.entryLoader) {
       const mergeLoader = this.merge(entryLoader, this.entryLoader);
       const entryLoaderOptions = mergeLoader.options || mergeLoader;
-      const { match, loader, babel = 'babel-loader' } = entryLoaderOptions;
+      const { match, loader } = entryLoaderOptions;
       let templateFile = entryLoaderOptions.templateFile || '';
       // 零配置：设置默认 entry 模板代码路径配置， TODO entry exclude 实现
       if (templateFile) {
@@ -299,14 +299,17 @@ class WebpackBaseBuilder extends Config {
       }
 
       if (match && loader) {
+        const babel = this.createBabelLoader();
+        const babelOptions = this.merge(babel.options, { babelrc: this.babelrc });
+        const babelLoaderString = `${babel.loader}?${JSON.stringify(babelOptions)}`;
         const entryLoaderString = this.utils.getLoaderOptionString(loader, { templateFile });
         const regMatch = match instanceof RegExp ? match : new RegExp(match);
         Object.keys(entries).forEach(entryName => {
           const entryFile = entries[entryName];
           if (this.utils.isString(entryFile)) {
             const fileExt = path.extname(entryFile);
             if (regMatch.test(fileExt)) {
-              entries[entryName] = [babel, entryLoaderString, entryFile].join('!');
+              entries[entryName] = [babelLoaderString, entryLoaderString, entryFile].join('!');
             }
           }
         });
@@ -592,8 +595,7 @@ class WebpackBaseBuilder extends Config {
       return config;
     }
     // use default babelrc
-    const options = require(this.babelrc);
-    return this.merge(config, { options });
+    return this.merge(config, { options : this.babelConfig });
   }
 
   createCacheLoader(loaderOptions, name) {
@@ -658,8 +660,8 @@ class WebpackBaseBuilder extends Config {
   setBabelENV(value) {
     const key = value || this.webpackConfig.target;
     try {
-      const json = require(this.babelrc);
-      if (json && json.env && json.env[key]) {
+      const { env } = this.babelConfig;
+      if (env && env[key]) {
         process.env.BABEL_ENV = key;
       }
     } catch (e) {

lib/base.js

@@ -147,6 +147,14 @@ class Config {
     return hotPlugin && this.isEnable(hotPlugin.enable);
   }
 
+  get babelConfig() {
+    if (this._babelConfig) {
+      return this._babelConfig;
+    }
+    this._babelConfig = this.utils.readFile(this.babelrc) || {};
+    return this._babelConfig;
+  }
+
   initZero(config) {
     if (this.egg) {
       zero.initEggDefault(config);