Function spawnStreaming

scripts/child-process.mjs:131–169

(
  command,
  args,
  opts,
  prefix,
  cmdDryRun = false
)

 */
// istanbul ignore next
export function spawnStreaming(
  command,
  args,
  opts,
  prefix,
  cmdDryRun = false
) {
  const options = {
    ...opts,
    nodeOptions: {
      stdio: ['pipe', 'inherit', 'inherit'],
    },
  };

  if (cmdDryRun) {
    return logExecDryRunCommand(command, args);
  }
  const spawned = spawnProcess(command, args, options, cmdDryRun);

  const stdoutOpts = {};
  const stderrOpts = {}; // mergeMultiline causes escaped newlines :P

  if (prefix) {
    const color = c['magenta'];
    stdoutOpts.tag = `${color.bold(prefix)}:`;
    stderrOpts.tag = `${color(prefix)}:`;
  }

  // Avoid 'Possible EventEmitter memory leak detected' warning due to piped stdio
  if (children.size > process.stdout.listenerCount('close')) {
    process.stdout.setMaxListeners(children.size);
    process.stderr.setMaxListeners(children.size);
  }

  spawned.stdout?.pipe(createLogPrefixer(stdoutOpts)).pipe(process.stdout);
  spawned.stderr?.pipe(createLogPrefixer(stderrOpts)).pipe(process.stderr);

  return wrapError(spawned);
}

// --
// private functions