Function check

cli/src/common.ts:16–22

(checks: CheckFunction[])

export type CheckFunction = () => Promise<string | null>;

export async function check(checks: CheckFunction[]): Promise<void> {
  const results = await Promise.all(checks.map((f) => f()));
  const errors = results.filter((r) => r != null) as string[];
  if (errors.length > 0) {
    throw errors.join('\n');
  }
}

export async function checkWebDir(config: Config): Promise<string | null> {
  // We can skip checking the web dir if a server URL is set.