perf: avoid requiring empty module (#3538)

packages/core/prebundle.config.mjs

@@ -5,13 +5,6 @@ import fs from 'node:fs';
  */
 import { join } from 'node:path';
 
-// postcss-loader and css-loader use `semver` to compare PostCSS ast version,
-// Rsbuild uses the same PostCSS version and do not need the comparison.
-const writeEmptySemver = (task) => {
-  const schemaUtilsPath = join(task.distPath, 'semver.js');
-  fs.writeFileSync(schemaUtilsPath, 'module.exports.satisfies = () => true;');
-};
-
 function replaceFileContent(filePath, replaceFn) {
   const content = fs.readFileSync(filePath, 'utf-8');
   const newContent = replaceFn(content);
@@ -20,6 +13,14 @@ function replaceFileContent(filePath, replaceFn) {
   }
 }
 
+// postcss-loader and css-loader use `semver` to compare PostCSS ast version,
+// Rsbuild uses the same PostCSS version and do not need the comparison.
+const skipSemver = (task) => {
+  replaceFileContent(join(task.depPath, 'dist/index.js'), (content) =>
+    content.replaceAll('require("semver")', '({ satisfies: () => true })'),
+  );
+};
+
 /** @type {import('prebundle').Config} */
 export default {
   prettier: true,
@@ -152,16 +153,18 @@ export default {
     {
       name: 'postcss',
       ignoreDts: true,
+      externals: {
+        picocolors: '../picocolors',
+      },
     },
     {
       name: 'css-loader',
       ignoreDts: true,
       externals: {
         semver: './semver',
         postcss: '../postcss',
-        picocolors: '../picocolors',
       },
-      afterBundle: writeEmptySemver,
+      beforeBundle: skipSemver,
     },
     {
       name: 'postcss-loader',
@@ -177,8 +180,8 @@ export default {
           // the ralevent code will never be executed, so we can replace it with an empty object.
           content.replaceAll('require("cosmiconfig")', '{}'),
         );
+        skipSemver(task);
       },
-      afterBundle: writeEmptySemver,
     },
     {
       name: 'postcss-load-config',