refactor(@angular/build): use newer Node.js cp API for asset copying

When using Node.js v22 (minimum Node.js v22.11 for Angular v20), the
application build system will now use the Node.js `cp` filesystem API
instead of the `copyFile` API. This newer API provides equivalent functionality
while also preserving timestamps for copied assets.  Additionally, it supports
potential future internal refactorings to support full direct directory
copying.

Author: clydin

packages/angular/build/src/builders/application/index.ts

@@ -28,6 +28,8 @@ import {
 import { Result, ResultKind } from './results';
 import { Schema as ApplicationBuilderOptions } from './schema';
 
+const isNodeV22orHigher = Number(process.versions.node.split('.', 1)[0]) >= 22;
+
 export type { ApplicationBuilderOptions };
 
 export async function* buildApplicationInternal(
@@ -211,7 +213,17 @@ export async function* buildApplication(
         await fs.writeFile(fullFilePath, file.contents);
       } else {
         // Copy file contents
-        await fs.copyFile(file.inputPath, fullFilePath, fs.constants.COPYFILE_FICLONE);
+        if (isNodeV22orHigher) {
+          // Use newer `cp` API on Node.js 22+ (minimum v22 for CLI is 22.11)
+          await fs.cp(file.inputPath, fullFilePath, {
+            mode: fs.constants.COPYFILE_FICLONE,
+            preserveTimestamps: true,
+          });
+        } else {
+          // For Node.js 20 use `copyFile` (`cp` is not stable for v20)
+          // TODO: Remove when Node.js 20 is no longer supported
+          await fs.copyFile(file.inputPath, fullFilePath, fs.constants.COPYFILE_FICLONE);
+        }
       }
     });
 

tests/legacy-cli/e2e/tests/build/assets.ts

@@ -1,12 +1,16 @@
+import assert from 'node:assert/strict';
 import * as fs from 'node:fs';
 import { expectFileToExist, expectFileToMatch, writeFile } from '../../utils/fs';
 import { ng } from '../../utils/process';
 import { updateJsonFile } from '../../utils/project';
 import { expectToFail } from '../../utils/utils';
 
+const isNodeV22orHigher = Number(process.versions.node.split('.', 1)[0]) >= 22;
+
 export default async function () {
   await writeFile('public/.file', '');
   await writeFile('public/test.abc', 'hello world');
+  const originalStats = fs.statSync('public/test.abc', { bigint: true });
 
   await ng('build', '--configuration=development');
 
@@ -15,6 +19,19 @@ export default async function () {
   await expectFileToMatch('dist/test-project/browser/test.abc', 'hello world');
   await expectToFail(() => expectFileToExist('dist/test-project/browser/.gitkeep'));
 
+  // Timestamp preservation only support with application build system on Node.js v22+
+  if (isNodeV22orHigher) {
+    const outputStats = fs.statSync('dist/test-project/browser/test.abc', { bigint: true });
+    assert(
+      originalStats.mtimeMs === outputStats.mtimeMs,
+      'Asset file modified timestamp should be preserved.',
+    );
+    assert(
+      originalStats.ctimeMs === outputStats.ctimeMs,
+      'Asset file created timestamp should be preserved.',
+    );
+  }
+
   // Ensure `followSymlinks` option follows symlinks
   await updateJsonFile('angular.json', (workspaceJson) => {
     const appArchitect = workspaceJson.projects['test-project'].architect;