Rails task for running yarn commands: add, remove, run

yarn.rake

FRONT_END_PATH = "client"

namespace :yarn do
  desc "install packages using rails instead of having to go into the client folder"
  args = ARGV.drop(1)

  task :add do
    dev = false

    next no_args_passed if args.length == 0

    if args.length == 1 || args.length >= 2 && args.include?("dev")
      if args.include?("dev")
        dev = true
        args.delete_at(args.index("dev"))
      end
      next install_packages(args.join(" "), dev)
    end
  end

  task :remove do
    next no_args_passed(true) if args.length == 0
    next remove_packages(args.join(" "))
  end

  task :run do
    next puts "Please specify the script you want to run" if args.length == 0
    next puts "Too many arguments, please specify only 1 script" if args.length > 1
    next run_script(args.join(" "))
  end
end

def no_args_passed(remove = false)
  puts "\nError: No arguments passed"
  if !remove
    puts "\n--sample:\trails yarn:add yarn_package dev\n\n"
    puts "dev:\t if dev is not passed, it will install as a regular dependency\n\n"
  else
    puts "\n--sample:\trails yarn:remove yarn_package\n\n"
  end
end

def install_packages(packages, save_dev)
  puts "running yarn add #{packages} #{"--dev" if save_dev}"
  exec "cd #{FRONT_END_PATH} && yarn add #{packages} #{"--dev" if save_dev}"
end

def remove_packages(packages)
  puts "running yarn remove #{packages}"
  exec "cd #{FRONT_END_PATH} && yarn remove #{packages}"
end

def run_script(script)
  puts "running yarn #{script}"
  exec "cd #{FRONT_END_PATH} && yarn #{script}"
end