Function fetchRemoteTemplate

packages/cli/src/templates/remote.ts:52–68

(templateId: string, destDir: string)

 * aborts before a single file is written.
 */
export async function fetchRemoteTemplate(templateId: string, destDir: string): Promise<void> {
  const items = await resolveItemWithDependencies(templateId);
  const warnings = gateRegistryItemsCompatibility(items);
  for (const warning of warnings) {
    process.stderr.write(`hyperframes:registry ${warning}\n`);
  }
  for (const item of items) {
    await installItem(item, { destDir });
  }

  // Safety check — an item with no index.html isn't a valid example.
  if (!existsSync(join(destDir, "index.html"))) {
    throw new Error(
      `Example "${templateId}" installed but missing index.html. The registry item may be malformed.`,
    );
  }
}