gistfile1.rb

output_file = File.open 'activemerchant_gateway_output.rb', 'w'
output_file.puts "PAYMENT_GATEWAYS = {"
File.open 'activemerchant_gateway_input.txt' do |input_file|
  input_file.each_line do |line|
    match = line.match /^.*?(\w*).rb:.*class (\w*)Gateway.*$/
    next unless match
    output_file.puts "  \"#{match[1]}\" => {"
    output_file.puts "    :name  => \"#{match[2]}\","
    output_file.puts "    :class => ActiveMerchant::Billing::#{match[2]}Gateway"
    output_file.puts "  },"
  end
end
output_file.puts "}"