Function execBuffered

src/node/utils/runtime/helpers.ts:37–68

(
  runtime: Runtime,
  command: string,
  options: ExecOptions & { stdin?: string }
)

 * Execute a command and buffer all output into strings
 */
export async function execBuffered(
  runtime: Runtime,
  command: string,
  options: ExecOptions & { stdin?: string }
): Promise<ExecResult> {
  const stream = await runtime.exec(command, options);

  // Write stdin if provided
  if (options.stdin !== undefined) {
    const writer = stream.stdin.getWriter();
    try {
      await writer.write(new TextEncoder().encode(options.stdin));
      await writer.close();
    } catch (err) {
      writer.releaseLock();
      throw err;
    }
  } else {
    // Close stdin immediately if no input
    await stream.stdin.close();
  }

  // Read stdout and stderr concurrently
  const [stdout, stderr, exitCode, duration] = await Promise.all([
    streamToString(stream.stdout),
    streamToString(stream.stderr),
    stream.exitCode,
    stream.duration,
  ]);

  return { stdout, stderr, exitCode, duration };
}

/**
 * Read file contents as a UTF-8 string