child process execution with nodejs

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import shelljs from "shelljs";
shelljs.exec(`echo -n "ABC"`, { silent: true }, function (code, stdout, err) {
  console.log(stdout)
});

/*
실행하면 출력될 내용은?
1. ABC
2. -n ABC

정답은 2.

터미널을 열고 echo -n "ABC" 를 입력해봐라 어떻게 출력되는가?
ABC 일것이다

shelljs 는 내부적으로 node: child_process 를 기반으로 한다고 한다
shelljs.exec 또한 child_process.exec 를 기반으로 하는 모양이다
그래서 child_process.exec 로 해본 결과도 동일하게 -n ABC 가 출력된다

나는 ABC 가 출력될것으로 알고 사용하고있는데 이렇게 예상과 다른 작동을 해버리면 이 경우 말고 다른경우에도 이런 예상 못한 작동을 안할거라는 보장을 누가해주는가..
신뢰도가 확 떨어져 불안해져버리는 상황이다.

이유가 뭔지 알아보던 중.. 알아냈다..
echo 'echo -n "ABC"' | zsh
echo 'echo -n "ABC"' | bash
echo 'echo -n "ABC"' | sh
세가지를 각각 터미널에서 실행해 보자
sh 의 경우에 -n ABC 로 출력되는 것을 볼 수 있다
child_process.exec 의 경우 sh 와 같은 작동을 하던것이였다..
그런데 child_process.spawn 의 경우는 spawn('echo', ['-n' 'ABC']) 해서 사용하면 zsh, bash 의 결과에서 처럼 나오는것이였다.
그런데 spawn 의 문제는 spawn('source', ['script.sh']) 이런게 해본결과 안됐다.. 그리고 복잡한 형태의 쉘스크립트 사용을 하기에 좀 적합하지 못한 인터페이스다.
그래서 어쨋든 원인도 알았으니 이 문제를 모두 해결한 코드를 만들 수 밖에 없었다.
*/

import fs from "fs";
import { promisify } from "util";
import { spawn } from 'node:child_process'
let runnerPath;
let executer = ['bash', 'zsh'];
const advExec = async (...argv) => {
  if (argv.length === 0) return {};
  let cwd, stdin;
  if (argv[argv.length - 1].constructor === Object) {
    let opt = argv.splice(argv.length - 1, 1)[0];
    if (opt?.cwd?.constructor === String) cwd = opt.cwd;
    if (opt?.stdin?.constructor === String) stdin = opt.stdin;
  }
  let command = argv.splice(0, 1)[0];
  const ls = spawn(command, argv, { cwd });
  if (stdin?.constructor === String) {
    ls.stdin.write(stdin)
    ls.stdin.end()
  }
  return await new Promise((resolve, reject) => {
    let stdout = [];
    let stderr = [];
    ls.stdout.on('data', (data) => stdout.push(data.toString()))
    ls.stderr.on('data', (data) => stderr.push(data.toString()))
    ls.on('close', (code) => resolve({ code, stderr: stderr.join(''), stdout: stdout.join('') }));
    ls.on('exit', (code) => { });
    ls.on('error', (code) => { });
    ls.on('spawn', (code) => { });
    ls.on('disconnect', (code) => { });
  })
};
const shellExec = async (stdin, cwd) => {
  if (cwd && !await promisify(fs.exists)(cwd)) return {};
  if (!runnerPath) {
    for (let name of executer) {
      let result = await advExec('which', name);
      if (result.code !== 0) continue;
      runnerPath = result.stdout.trim();
      break;
    }
    if (!runnerPath) return {};
  }
  return await advExec(runnerPath, { stdin, cwd })
}
export default shellExec;

/*
[사용법]
  console.log(await shellExec('pwd', '/Users/kst'))
  console.log(await shellExec('pwd'))
  console.log(await shellExec('ls nothing && pwd'))
  console.log(await shellExec('pwd\npwd'))
*/

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$ cat /etc/shells
# List of acceptable shells for chpass(1).
# Ftpd will not allow users to connect who are not using
# one of these shells.

/bin/bash
/bin/csh
/bin/dash
/bin/ksh
/bin/sh
/bin/tcsh
/bin/zsh

$ /bin/bash --version
GNU bash, version 3.2.57(1)-release (arm64-apple-darwin21)
Copyright (C) 2007 Free Software Foundation, Inc.

$ /bin/csh --version
tcsh 6.21.00 (Astron) 2019-05-08 (unknown-apple-darwin) options wide,nls,dl,bye,al,kan,sm,rh,color,filec

$ /bin/dash --version
/bin/dash: 0: Illegal option --

$ /bin/ksh --version
  version         sh (AT&T Research) 93u+ 2012-08-01

$ /bin/sh --version
GNU bash, version 3.2.57(1)-release (arm64-apple-darwin21)
Copyright (C) 2007 Free Software Foundation, Inc.

$ /bin/tcsh --version
tcsh 6.21.00 (Astron) 2019-05-08 (unknown-apple-darwin) options wide,nls,dl,bye,al,kan,sm,rh,color,filec

$ /bin/zsh --version
zsh 5.8.1 (x86_64-apple-darwin21.0)

그래서 아래를 테스트해본 결과 sh만 결과가 다르게 나왔다.

$ echo "echo -n 'ABC'" | /bin/bash
ABC
$ echo "echo -n 'ABC'" | /bin/csh
ABC
$ echo "echo -n 'ABC'" | /bin/dash
ABC
$ echo "echo -n 'ABC'" | /bin/ksh
ABC
$ echo "echo -n 'ABC'" | /bin/sh
-n ABC

$ echo "echo -n 'ABC'" | /bin/tcsh
ABC
$ echo "echo -n 'ABC'" | /bin/zsh
ABC

그래서 우분투 피씨를 켜서 sh 를 테스트해본결과 맥과는 달랐다.