system 'rubocop > rubocop.result'
file = File.open 'rubocop.result'
rules_list = Hash.new { |hash, key| hash[key] = 0 }

file.each_line do |line|
  rules_list[$1] += 1 if line.match(/\d+:\s[CW]:\s(.+?):/)
end

File.delete file

puts '#' * 100
rules_list.sort.map { |rule, count| puts "#{rule} --> #{count} violations" }

puts '#' * 100
rules_list
  .group_by { |_, size| size }
  .sort_by { |size, _| size }
  .map { |size, rules| puts "#{size} (x#{rules.size}) entries of each: #{rules.map(&:first)}" }

puts '#' * 100
puts "#{rules_list.count} rules in total"
puts "#{rules_list.values.sum} violations in total"
puts '#' * 100