apache_parser.rb

require 'securerandom'

class Vhost
  attr_reader :content, :vhost_line

  def initialize(vhost_line, content)
    @vhost_line = vhost_line
    @content    = content
  end

  def to_s
    entry = "<VirtualHost #{vhost_line}>\n"
    content.each do |line|
      line.each do |key, value|
        if key == :directive
          entry << "    #{value}\n"
        else
          entry << "    #{key} #{value}\n"
        end
      end
    end
    entry << "</VirtualHost>\n\n"
  end
end

apache_config = IO.readlines('httpd.conf')
vhosts        = {}
in_vhost      = false
key           = ""

def create_key_values_from_line(content)
  content    = content.gsub(/^\s+/, '').strip
  key, value = content.split(/\s+/)

  if content.match(/^</)
    { :directive =>  content }
  else
    { key => value }
  end
end

apache_config.each do |line|
  if line.match(/\s*<VirtualHost (.*?)>/i)
    key                   = SecureRandom.uuid
    vhosts[key]           = Hash.new
    vhosts[key][:vhost]   = $1
    vhosts[key][:content] = Array.new
    in_vhost              = true
  elsif line.match(/\s*<\/VirtualHost>/)
    in_vhost = false
  elsif in_vhost
    vhosts[key][:content] << create_key_values_from_line(line)
  else
    in_vhost = false
    next
  end
end

vhosts.each do |values|
  key, vhost = values
  puts Vhost.new(vhost[:vhost], vhost[:content]).to_s
end