Awstats browser breakdown

#!/usr/bin/env ruby

require 'pp'

DEBUG = false

stats = {}

stats['Firefox-3.5'] = { :hits => 0, :percent => 0 }
stats['Firefox-3.0'] = { :hits => 0, :percent => 0 }
stats['Firefox-2.0'] = { :hits => 0, :percent => 0 }
stats['Msie-6.0'] = { :hits => 0, :percent => 0 }
stats['Msie-7.0'] = { :hits => 0, :percent => 0 }
stats['Msie-8.0'] = { :hits => 0, :percent => 0 }

total_stats = {
  'Firefox' => 0,
  'Msie' => 0
}

File.open('stats.txt', 'r') do |f|
  f.readlines.each do |l|

    next if l.gsub!(/^\s*|\s*$/, '').empty?

    m = /^\s*(\D+)\s+([\d\.]+)\s*\w+\s*(\d+).*$/.match(l)

    browser = m[1]
    browser_and_version = "#{m[1]}-#{m[2]}"
    hits = m[3].to_i

    stats.each do |x|
      puts "DEBUG: Checking #{browser_and_version} against #{x[0]}" if DEBUG
      if browser_and_version.include?(x[0])
        puts "DEBUG: #{browser_and_version} matches #{x[0]} - adding #{hits}" if DEBUG
        stats[x[0]][:hits] = stats[x[0]][:hits] + hits
        total_stats[browser] = total_stats[browser] + hits
        break
      end
    end
  end
end

pp total_stats

stats.each do |y|
  total_stats.each do |x|
    puts "DEBUG: Checking #{y[0]} against #{x[0]}" if DEBUG
    if y[0].include?(x[0])
      puts "DEBUG: #{y[0]} matches #{x[0]}" if DEBUG
      stats[y[0]][:percent] = sprintf('%.2f', (y[1][:hits].to_f / x[1].to_f) * 100)
      break
    end
  end
end

pp stats.sort