#!/bin/env ruby

require 'json'

source = ARGV[0]

home = File.expand_path(__dir__)

if not source

puts 'Usage: '

Dir.chdir home

Dir["docs/src/_examples/rails/*.md"].sort.each do |file|

next if File.basename(file) == 'index.md'

puts " #{$PROGRAM_NAME} #{file}"

end

exit 1

end

# determine what to install based on the markdown source file name

install = File.basename(source, '.md').gsub('_', ':').gsub('-', '')

# extract instructions from markdown source

source = IO.read(source)

gen = %r{\./bin/rails generate .*}.match(source)

html = /.*`(.*?)`.*?```(?:html|erb)\n(.*?)```/m.match(source)

ruby = /.*`(.*?)`.*?```ruby\n(.*?)```/m.match(source)

link = %r{<(http://localhost:3000/.*?)>}.match(source)

# Create a rails app

system 'rm -rf testrails'

system 'rails new testrails'

Dir.chdir 'testrails'

system './bin/spring stop'

# install ruby2js and dependencies

add = ["gem 'ruby2js', path: #{home.inspect}, require: 'ruby2js/rails'"]

add << "gem 'stimulus-rails'" if install.include? 'stimulus'

IO.write 'Gemfile', "\n" + add.join("\n"), mode: 'a'

system './bin/bundle install'

system "./bin/rails ruby2js:install:#{install}"

# install locally built ruby2js

ruby2js = "#{home}/packages/ruby2js"

version = JSON.parse(IO.read "#{ruby2js}/package.json")['version']

mod = Dir["#{ruby2js}/ruby2js-ruby2js-*#{version}.tgz"].first

system "yarn add #{mod}" if mod

# install locally built webpack-loader

loader = "#{home}/packages/webpack-loader"

version = JSON.parse(IO.read "#{loader}/package.json")['version']

mod = Dir["#{loader}/ruby2js-webpack-loader-*#{version}.tgz"].first

system "yarn add #{mod}" if mod

# create ruby and html sources per markdown

system gen[0]

IO.write html[1], html[2], mode: 'a+' if html

IO.write ruby[1], ruby[2], mode: 'w' if ruby

File.unlink ruby[1].chomp('.rb') if File.exist? ruby[1].chomp('.rb')

# launch browser once server is up and running

require 'net/http'

Thread.new do

port = link[1][/:(\d+)/, 1].to_i

# wait for server to start

60.times do

sleep 0.5

begin

status = Net::HTTP.get_response('0.0.0.0','/',port).code

break if %(200 404 500).include? status

rescue Errno::ECONNREFUSED, Errno::ETIMEDOUT

end

end

# launch browser

if RbConfig::CONFIG['host_os'] =~ /mswin|mingw|cygwin/

system "start #{link[1]}"

elsif RbConfig::CONFIG['host_os'] =~ /darwin/

system "open #{link[1]}"

elsif RbConfig::CONFIG['host_os'] =~ /linux|bsd/

if ENV['WSLENV'] and not `which wslview`.empty?

system "wslview #{link[1]}"

else

system "xdg-open #{link[1]}"

end

end

end

# start server

system './bin/rails server'