texrg

MRuby::GemBox.new do |conf|
  # Use standard Kernel#sprintf method
  conf.gem :core => "mruby-sprintf"

  # Use standard print/puts/p
  conf.gem :core => "mruby-print"

  # Use standard Math module
  conf.gem :core => "mruby-math"

texrg

"app.rb"
[1, 2, 3].each { |a| puts a }

"ruby2js.rb"

#!/usr/bin/ruby
# encoding: utf-8
require 'opal'

ruby_file = ARGV[0]