class Opal::CliRunners::Nodejs

def initialize(options)
  @output = options.fetch(:output, $stdout)
end

def node_modules
  NODE_PATH
end

def puts(*args)
  output.puts(*args)
end

def run(code, argv)
  require 'tempfile'
  tempfile = Tempfile.new('opal-nodejs-runner-')
  # tempfile = File.new('opal-nodejs-runner.js', 'w') # for debugging
  tempfile.write code
  tempfile.close
  system_with_output({'NODE_PATH' => node_modules}, 'node', tempfile.path , *argv)
rescue Errno::ENOENT
  raise MissingNodeJS, 'Please install Node.js to be able to run Opal scripts.'
end

def system_with_output(env, *cmd)
  if IO.try_convert(output)
    system(env,*cmd)
    @exit_status = $?.exitstatus
    return
  end
  if RUBY_PLATFORM == 'java'
    # JRuby has issues in dealing with subprocesses (at least up to 1.7.15)
    # @headius told me it's mostly fixed on master, but while we wait for it
    # to ship here's a tempfile workaround.
    require 'tempfile'
    require 'shellwords'
    tempfile = Tempfile.new('opal-node-output')
    system(env,cmd.shelljoin+" > #{tempfile.path}")
    @exit_status = $?.exitstatus
    captured_output = File.read tempfile.path
    tempfile.close
  else
    require 'open3'
    captured_output, status = Open3.capture2(env,*cmd)
    @exit_status = status.exitstatus
  end
  output.write captured_output
end