generate lockfiles script: throw if pnpm used is not v8

scripts/generate-lockfiles.mjs

@@ -1,4 +1,4 @@
-import { existsSync } from 'node:fs';
+import { existsSync, readFileSync } from 'node:fs';
 import { join } from 'node:path';
 import { spawnSync } from 'node:child_process';
 import { getExampleDirs } from './common-lockfiles.mjs';
@@ -11,6 +11,15 @@ if (dirs.length === 0) {
     process.exit(1);
 }
 
+const pnpmVersion = getPnpmVersionFromPath();
+console.log(`Using pnpm version: ${pnpmVersion}`);
+const expectedVersion = getExpectedVersionFromPackageJson();
+// assert pnpm V
+if (pnpmVersion !== expectedVersion) {
+    console.error(`Expected pnpm version ${expectedVersion}, got ${pnpmVersion}`);
+    process.exit(1);
+}
+
 let failures = 0;
 for (const pkgDir of dirs) {
     console.log(`\n[lockfile] ${pkgDir}`);
@@ -43,3 +52,25 @@ if (failures) {
 }
 
 console.log('\nDone.');
+
+function getExpectedVersionFromPackageJson() {
+    const packageJson = JSON.parse(readFileSync(join(process.cwd(), 'package.json'), 'utf8'));
+    const packageManager = packageJson.packageManager;
+    if (!packageManager?.startsWith('pnpm@')) {
+        throw new Error(`Invalid packageManager: ${packageManager || 'missing'}. Expected format: "[email protected]"`);
+    }
+    return packageManager.slice(5); // Remove "pnpm@" prefix
+}
+
+function getPnpmVersionFromPath() {
+    const { status, stdout, error } = spawnSync('pnpm', ['--version'], { encoding: 'utf8' });
+    if (status !== 0) {
+        const hint = error?.code === 'ENOENT' ? 'pnpm is not on PATH.' : 'failed to run "pnpm --version".';
+        throw new Error(`Could not determine pnpm version: ${hint}`);
+    }
+    const version = stdout.trim();
+    if (!version) {
+        throw new Error('Empty version output from "pnpm --version".');
+    }
+    return version;
+}