1#!/usr/bin/env ruby
 2APP_ROOT = File.expand_path('..', __dir__)
 3Dir.chdir(APP_ROOT) do
 4  yarn = ENV["PATH"].split(File::PATH_SEPARATOR).
 5    select { |dir| File.expand_path(dir) != __dir__ }.
 6    product(["yarn", "yarn.cmd", "yarn.ps1"]).
 7    map { |dir, file| File.expand_path(file, dir) }.
 8    find { |file| File.executable?(file) }
 9
10  if yarn
11    exec yarn, *ARGV
12  else
13    $stderr.puts "Yarn executable was not detected in the system."
14    $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install"
15    exit 1
16  end
17end