#!/usr/bin/env ruby
 
exit(1) unless ARGV[0] && File.exist?(ARGV[0])
 
require 'yaml'
 
dbs = YAML.load_file(ARGV[0]).collect do |name,info|
  adapter = info['adapter'] || info[:adapter]
  db      = info['database'] || info[:database]
  [adapter,db]
end.uniq.each do |(adapter,db)|
  puts "%s\t%s" % [adapter, db]
end
 
exit 0