---
title: "Don’t manually hunt around for <code>yarn.lock</code> or <code>package-lock.json</code>"

date: 2024-08-27T10:11:01+0100
modified: 2024-09-20T14:59:04+0100
status: published
layout: ../layouts/Post.astro
---

```perl
#!/usr/bin/env perl

# Node dependency manager. Never wonder whether to use `yarn` or `npm` again.

# Usage:
# np        --> runs `yarn` or `npm i`
# np <args> --> runs `yarn <args>` or `npm run <args>`

use strict;
use warnings;

if (!-e 'package.json') {
  my $did_run = 0;
  my @dirs = grep { -d $_ } glob('*');
  for my $dir (@dirs) {
    $did_run = 1;
    chdir($dir);
    if (-e 'package.json') {
      print "Running `np` in $dir\n";
      my $exit_code = system('np ' . join(' ', @ARGV));
      exit($exit_code >> 8) if $exit_code != 0;
    }
    chdir('..');
  }

  if ($did_run == 0) {
    print "No package.json found. Exiting.\n";
    exit(1);
  }
  exit(0);
}

my $exit_code;
if (-e 'package-lock.json') {
  if (@ARGV) {
    $exit_code = system('npm run ' . join(' ', @ARGV));
  } else {
    $exit_code = system('npm i');
  }
} else {
  $exit_code = system('yarn ' . join(' ', @ARGV));
}

exit($exit_code >> 8);
```