Function findEntrypoint

packages/backends/src/find-entrypoint.ts:38–106

(
  cwd: string
)

  );

export const findEntrypoint = async (
  cwd: string
): Promise<string | undefined> => {
  let packageJsonObject: {
    main?: string;
    dependencies?: Record<string, string>;
  } | null = null;
  try {
    const packageJson = await readFile(join(cwd, 'package.json'), 'utf-8');
    packageJsonObject = JSON.parse(packageJson);
  } catch (_) {
    // ignore
  }

  if (packageJsonObject) {
    const main =
      typeof packageJsonObject.main === 'string'
        ? packageJsonObject.main.trim()
        : '';
    if (main) {
      const abs = resolve(cwd, main);
      const rel = relative(cwd, abs);
      if (!rel.startsWith('..') && rel !== '') {
        try {
          await readFile(abs, 'utf-8');
          return rel.split(sep).join('/');
        } catch {
          // main missing or unreadable; fall through to filename heuristics
        }
      }
    }
  }

  let framework: string | undefined;
  if (packageJsonObject) {
    framework = frameworks.find(
      framework => packageJsonObject!.dependencies?.[framework]
    );
  }

  if (!framework) {
    for (const entrypoint of entrypoints) {
      const entrypointPath = join(cwd, entrypoint);
      try {
        await readFile(entrypointPath, 'utf-8');
        return entrypoint;
      } catch (_) {
        // ignore
      }
    }
  }

  const regex = framework ? createFrameworkRegex(framework) : undefined;

  for (const entrypoint of entrypoints) {
    const entrypointPath = join(cwd, entrypoint);
    try {
      const content = await readFile(entrypointPath, 'utf-8');