hobo habtm generator

#!/usr/bin/env ruby
require  'config/environment'

puts <<-__MIGRATE
ActiveRecord::Schema.define do
__MIGRATE

  join_tables = Hash.new

  Dir.glob( './app/models/**/*' ).map { |f|     # file name
      f =~ /(\w+).rb/
      Object.const_get $1.classify rescue nil
  }.compact.map { |m|                           # model class
      m.reflect_on_all_associations
  }.flatten.select { |a|                        # association
      a.options.keys.include? :join_table
  }.each do |c|

  table = c.options[ :join_table ]
    # both sides of the association will appear.  we only want the first one
    puts <<-__MIGRATE unless join_tables.has_key? table
  create_table "#{ table }", :id => false, :force => true do |t|
    t.integer  "#{ c.primary_key_name }"
    t.integer  "#{ c.association_foreign_key }"
  end
__MIGRATE

    join_tables[table] = true
  end

puts <<-__MIGRATE
end
__MIGRATE


## Now, tack this generated code into the up method of a migration ...