>> ActiveRecord::Base.configurations
=> {}

development:
  host: localhost
  adapter: mysql
  username: [name]
  password: [pw]
  database: [db]

pp ENV["PATH"].split(":")
["~/.rvm/gems/ruby-1.8.7-head/bin",
 "~/.rvm/gems/ruby-1.8.7-head@global/bin",
 "~/.rvm/rubies/ruby-1.8.7-head/bin",
 "~/.rvm/bin",
 "/usr/local/bin",
 "/usr/bin",
 "/bin",
 "/usr/sbin",
 "/sbin"]

mysql (2.9.1)
    Author: TOMITA Masahiro
    Rubyforge: http://rubyforge.org/projects/mysql-win
    Homepage: http://github.com/luislavena/mysql-gem
    Installed at: ~/.rvm/gems/ruby-1.8.7-head


rvm gemset list
gemsets for ruby-1.8.7-head (found in ~/.rvm/gems/ruby-1.8.7-head)
=> (default)
   global