init

node_modules/@dcloudio/uni-mp-weixin/lib/independent-plugins/app-interceptor-plugin.js

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+const t = require('@babel/types');
+const babelTraverse = require('@babel/traverse').default;
+const babelParser = require('@babel/parser');
+const babelGenerator = require('@babel/generator');
+const { generateAsset } = require('./utils');
+const { collectIndependentJsAssets } = require('./optimize-components-position/util');
+
+const visitor = {
+  CallExpression (path) {
+    const funNode = path.node;
+    // https://developers.weixin.qq.com/miniprogram/dev/reference/api/getApp.html
+    // FIX: 目前getApp仅支持一个参数(allowDefault)，如果后面增加更多的参数以下逻辑需要修改
+    // 增减判断是否有该参数逻辑
+
+    if (t.isIdentifier(path.node.callee)) {
+      const logicGlobal = '(Function("return this")())'
+      if (funNode.callee.name === 'getApp' && funNode.arguments.length === 0) {
+        funNode.callee = t.MemberExpression(t.Identifier(logicGlobal), t.Identifier('getApp'));
+      } else if (funNode.callee.name === 'App') {
+        funNode.callee = t.MemberExpression(t.Identifier(logicGlobal), t.Identifier('App'));
+      }
+    }
+  },
+};
+
+// 关键：需要在在整个emit阶段的最后（compilation.assets['/pages/chat-im/wxcomponents/...']
+class AppInterceptorPlugin {
+  apply (compiler) {
+    compiler.hooks.emit.tapPromise('AppInterceptorPlugin', compilation => {
+      return new Promise(resolve => {
+        // 收集独立分包路径下面的所有js文件
+        // js文件都存储在 compilation.assets中 ， 因为需要注入 require(`${pkgRoot/common/index.js}`)
+        const thisCompilationAssets = compilation.assets;
+        const independentJsAssets = collectIndependentJsAssets(thisCompilationAssets);
+        independentJsAssets.forEach(({ jsAssets }) => {
+          jsAssets.forEach(jsAssetName => {
+              if (jsAssetName.endsWith('common/wxMpRuntime.js')) {
+                  return;
+              }
+              const assetInfo = thisCompilationAssets[jsAssetName];
+              let assetSource = assetInfo.source();
+
+              // 有部分js文件在这里是Buffer类型
+              if (assetSource instanceof Buffer) {
+                assetSource = assetSource.toString();
+              }
+
+              const ast = babelParser.parse(assetSource, {
+                sourceType: 'module',
+                plugins: ['classProperties'],
+              });
+              babelTraverse(ast, visitor);
+              const { code } = babelGenerator.default(ast);
+              thisCompilationAssets[jsAssetName] = generateAsset(code);
+            }
+          );
+        });
+
+        resolve();
+      });
+    });
+  }
+}
+
+module.exports = AppInterceptorPlugin;