#!/usr/bin/ruby
HOME = '/home/rubys'
ARGV.push 'ruby-trunk', '1.9.1' if ARGV.empty?

source=ARGV.first
release=ARGV.last

system "find #{HOME}/.rvm -maxdepth 2 -name 'ruby-#{release}-r*' -mtime +7 | " +
  "xargs rm -rf"

Dir.chdir("#{HOME}/.rvm/src") do
  rev = Dir.chdir(source) do
    system 'svn update'
    `svn info`.scan(/Last Changed Rev: (\d+)/).flatten.first
  end
  break if File.exist? "ruby-#{release}-r#{rev}"
  system "cp -r #{source} ruby-#{release}-r#{rev}"
  system "bash -c 'source ../scripts/rvm; " +
    "TERM=dumb rvm install #{release}-#{rev}'"
end