Function closeOutputFile

src/commands/test.ts:7833–7843

* Flush + close the file sink. Called on the success path after the * last write and on the error path inside a `.catch(() => undefined)` * so the original error isn't masked by a teardown failure. * * Re-raises any async stream error captured by the `'error'` listener. * Without this re-raise,

(sink: FileSink)

 * exactly the failure mode `--out` exists to avoid.
 */
function closeOutputFile(sink: FileSink): Promise<void> {
  return new Promise((resolve, reject) => {
    sink.stream.end(() => {
      if (sink.error) {
        reject(new TransportError(`Failed to write --out ${sink.path}: ${sink.error.message}`));
        return;
      }
      resolve();
    });
  });
}

/** A presigned `code` body is any `https://` URL — never anything else. */
export function isPresignedCodeUrl(code: string): boolean {