prerenderRoutes static method

Future<void> prerenderRoutes(List<String> routes, String baseUrl, String outputDir)

Pre-renders the given routes from baseUrl into outputDir.

Implementation

static Future<void> prerenderRoutes(
    List<String> routes, String baseUrl, String outputDir) async {
  const toolPath = 'tool/prerender.dart';
  final toolFile = File(toolPath);
  if (!await toolFile.exists()) {
    stdout.writeln('⚠️ Pre-render tool not found at $toolPath');
    stdout.writeln('Creating default prerender script...');
    await toolFile.create(recursive: true);
    await toolFile.writeAsString('''
import 'dart:io';
import 'package:puppeteer/puppeteer.dart';

Future<void> main(List<String> args) async {
final routes = args.isNotEmpty ? args : ['/'];
final baseUrl = 'http://localhost:8080';
final outputDir = Directory('build/web');

final browser = await puppeteer.launch(headless: true, args: ['--no-sandbox']);
for (final route in routes) {
  stdout.writeln('📄 Pre-rendering \$route');
  final page = await browser.newPage();
  try {
    await page.goto('\$baseUrl\$route', wait: Until.networkIdle);
    final content = await page.content;
    final routePath = route == '/' ? '' : route;
    final file = File('\${outputDir.path}\$routePath/index.html');
    await file.create(recursive: true);
    await file.writeAsString(content ?? '');
  } catch (e) {
    stderr.writeln('❌ Error pre-rendering \$route: \$e');
  } finally {
    await page.close();
  }
}
await browser.close();
stdout.writeln('✅ Pre-rendering completed.');
}
''');
  }

  final process = await Process.start('dart', ['run', toolPath, ...routes]);
  await process.stdout.pipe(stdout);
  await process.stderr.pipe(stderr);
  final exitCode = await process.exitCode;
  if (exitCode != 0) {
    stderr.writeln('❌ Pre-rendering failed with exit code $exitCode');
  }
}