fix(commonjs): replace top-level this with exports name

packages/commonjs/src/transform-commonjs.js

@@ -102,6 +102,7 @@ export default async function transformCommonjs(
   const topLevelAssignments = new Set();
   const topLevelDefineCompiledEsmExpressions = [];
   const replacedGlobal = [];
+  const replacedThis = [];
   const replacedDynamicRequires = [];
   const importedVariables = new Set();
   const indentExclusionRanges = [];
@@ -369,7 +370,7 @@ export default async function transformCommonjs(
           if (lexicalDepth === 0 && !classBodyDepth) {
             uses.global = true;
             if (!ignoreGlobal) {
-              replacedGlobal.push(node);
+              replacedThis.push(node);
             }
           }
           return;
@@ -444,6 +445,11 @@ export default async function transformCommonjs(
       storeName: true
     });
   }
+  for (const node of replacedThis) {
+    magicString.overwrite(node.start, node.end, exportsName, {
+      storeName: true
+    });
+  }
   for (const node of replacedDynamicRequires) {
     magicString.overwrite(
       node.start,

packages/commonjs/test/fixtures/function/this/main.js

@@ -1,10 +1,11 @@
-const { augmentThis, classThis } = require('./foo');
+const { augmentThis, classThis, y } = require('./foo');
 
 const obj = {};
 augmentThis.call(obj);
 
 t.is(obj.x, 'x');
-t.is(this.y, 'y');
+t.is(this.y, undefined);
+t.is(y, 'y');
 
 const instance = new classThis();
 

packages/commonjs/test/snapshots/function.js.md

@@ -7286,8 +7286,6 @@ Generated by [AVA](https://avajs.dev).
     {
       'main.js': `'use strict';␊
       ␊
-      var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};␊
-      ␊
       var main = {};␊
       ␊
       var foo = {};␊
@@ -7296,7 +7294,7 @@ Generated by [AVA](https://avajs.dev).
         this.x = 'x';␊
       };␊
       ␊
-      commonjsGlobal.y = 'y';␊
+      foo.y = 'y';␊
       ␊
       foo.classThis = class classThis {␊
         constructor(){␊
@@ -7310,13 +7308,14 @@ Generated by [AVA](https://avajs.dev).
         yy = this.y␊
       };␊
       ␊
-      const { augmentThis, classThis } = foo;␊
+      const { augmentThis, classThis, y } = foo;␊
       ␊
       const obj = {};␊
       augmentThis.call(obj);␊
       ␊
       t.is(obj.x, 'x');␊
-      t.is(commonjsGlobal.y, 'y');␊
+      t.is(main.y, undefined);␊
+      t.is(y, 'y');␊
       ␊
       const instance = new classThis();␊
       ␊