runner.rb

#!/usr/bin/env jruby
require 'rubygems'
require 'fileutils'
require 'optparse'

ENV['RAILS_ENV'] = "development"

launcher, options = "jruby", ""
OptionParser.new do |opt|
  opt.banner = "Usage: runner [OPTIONS]"
  opt.separator  ""
  opt.separator  "Options"
  opt.on('-r', '--ruby ruby', 'which ruby you want to run') { |v| launcher = v }
  opt.on('-o', '--options opts', 'options for ruby command') { |v| options = v }
end.parse!

full_path = File.expand_path launcher
launcher = full_path if File.exist? full_path

$jruby = "#{launcher} #{options} "

def jruby_command(command, *args)
  command = "#{$jruby} -S #{command} #{args.join(' ')}"
  puts "$ #{command}"
  value = system command
  puts value
end

rails_app = 'frogger'

FileUtils.rm_rf rails_app
jruby_command("gem", "install rails --version=4.2.7")
jruby_command("rails", "new", rails_app)
Dir.chdir(rails_app) do
  jruby_command("bundle", "install")
  jruby_command("rails", "generate scaffold person name:string")
  jruby_command("rake", "db:migrate")
  jruby_command("rails", "server")
end
puts "Done"