zsh completion builder for shorewall and shorewall6 main commands

builder.rb

#!/usr/bin/env ruby
# encoding: utf-8

require 'pathname'

['shorewall', 'shorewall6'].each do |shorewall_version|
  if %x{whereis #{shorewall_version}}.split[1].nil?
    puts "#{shorewall_version} not installed."
  else
    commands = {}

    %x{sudo #{shorewall_version}}.split(/\n/).each do |command|
      if command =~ /^\ \ \ /
        command = command.gsub('   ', '').split

        commands[command[0]] = ''
      end
    end

    file_content =<<FILE
#compdef #{shorewall_version}

_arguments \\
  ':command:(#{commands.map{|l,a| l.to_s}.join(' ')})'
FILE

    File.open(output_file = Pathname.pwd + "_#{shorewall_version}", 'w') do |file|
      file << file_content
    end

    puts "#{output_file} created."
  end
end