#!/usr/bin/env ruby APP_ROOT = File.expand_path("..", __dir__) Dir.chdir(APP_ROOT) do yarn = ENV["PATH"].split(File::PATH_SEPARATOR). select { |dir| File.expand_path(dir) != __dir__ }. product(["yarn", "yarnpkg", "yarn.cmd", "yarn.ps1"]). map { |dir, file| File.expand_path(file, dir) }. find { |file| File.executable?(file) } if yarn exec yarn, *ARGV else $stderr.puts "Yarn executable was not detected in the system." $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install" exit 1 end end