fix: should export rspack function from compiler.rspack (#12636)

* fix: exports function from compiler.rspack

* fix: exports function from compiler.rspack

* Update tests/rspack-test/compilerCases/exports.js

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix: exports function from compiler.rspack

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: LingyuCoder

packages/rspack/src/Compiler.ts

@@ -34,20 +34,22 @@ import { applyRspackOptionsDefaults, getPnpDefault } from './config/defaults';
 import type { PlatformTargetProperties } from './config/target';
 import ExecuteModulePlugin from './ExecuteModulePlugin';
 import ConcurrentCompilationError from './error/ConcurrentCompilationError';
+import * as rspackExports from './exports';
 import {
   ThreadsafeInputNodeFS,
   ThreadsafeIntermediateNodeFS,
   ThreadsafeOutputNodeFS,
 } from './FileSystem';
 import type { FileSystemInfoEntry } from './FileSystemInfo';
-import { rspack } from './index';
+import type { rspack } from './index';
 import Cache from './lib/Cache';
 import CacheFacade from './lib/CacheFacade';
 import { Logger } from './logging/Logger';
 import { NormalModuleFactory } from './NormalModuleFactory';
 import { ResolverFactory } from './ResolverFactory';
 import { RuleSetCompiler } from './RuleSetCompiler';
 import { createCompilerRuntimeGlobals } from './RuntimeGlobals';
+import { rspack as rspackFn } from './rspack';
 import { Stats } from './Stats';
 import {
   createCompilationHooksRegisters,
@@ -250,14 +252,16 @@ class Compiler {
     };
 
     const compilerRuntimeGlobals = createCompilerRuntimeGlobals(options);
-    this.webpack = {
-      ...rspack,
-      RuntimeGlobals: compilerRuntimeGlobals,
-    } as typeof rspack;
-    this.rspack = {
-      ...rspack,
+    const compilerFn = function (...params: Parameters<typeof rspackFn>) {
+      return rspackFn(...params);
+    };
+    const compilerRspack = Object.assign(compilerFn, rspackExports, {
       RuntimeGlobals: compilerRuntimeGlobals,
-    } as typeof rspack;
+    }) as unknown as typeof rspack;
+    compilerRspack.rspack = compilerRspack;
+    compilerRspack.webpack = compilerRspack;
+    this.webpack = compilerRspack;
+    this.rspack = compilerRspack;
     this.root = this;
     this.outputPath = '';
 

tests/rspack-test/compilerCases/exports.js

@@ -0,0 +1,30 @@
+const { RuntimeGlobals } = require("@rspack/core");
+
+class MyPlugin {
+  apply(compiler) {
+    expect(typeof compiler.rspack).toBe("function");
+    expect(compiler.rspack.sources).toBeTruthy();
+    expect(compiler.rspack.Compilation).toBeTruthy();
+    expect(compiler.rspack.RuntimeGlobals).toBeTruthy();
+    expect(compiler.rspack.RuntimeGlobals).not.toBe(RuntimeGlobals);
+  }
+}
+
+/** @type {import('@rspack/test-tools').TCompilerCaseConfig} */
+module.exports = {
+  description: "should export rspack function from compiler.rspack with unique RuntimeGlobals",
+  options(context) {
+    return {
+      context: context.getSource(),
+      entry: "./d",
+      plugins: [new MyPlugin()]
+    };
+  },
+  async build(_, compiler) {
+    await new Promise(resolve => {
+      compiler.run(() => {
+        resolve();
+      });
+    });
+  },
+};