Generate Markdown table of open ports from Nmap scan results

create-ports-table.rb

host_addr = %r{Host: (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})}
open_port = %r{([0-9]+)/open/}

ports = {}

ARGV.each do |f|
  File.foreach(f) do |l|
    l.scan(host_addr) do |a|
      l.scan(open_port) do |p|
        ports[a.first] = [] unless ports.key?(a.first)
        ports[a.first] << p.first.to_i
      end
    end
  end
end

puts 'Host | Listening Ports'
puts ':--: | :-------------:'

ports.each do |a,p|
  puts "#{a} | **TCP:** #{p.uniq.sort.join(', ')}"
end