gistfile1.rb

#!/usr/bin/env ruby

port_list = `port installed`
port_list.each_line do |port_line|
  port_line =~ /  ([^\s]+) @([^\+\s]+)(\+?[^\s]*)/
  name, version, variants = $1, $2, $3
  next if name.nil?
  variants = variants.split('+') rescue []
  puts "sudo port install #{name} #{variants.map{|v| " +"+v unless v == '' }.join}"
end