repo_stat.rb

# Usage:
## cd /path/to/repository && ruby /path/to/repo_stat.rb

files = `git grep --cached -Il ''`.chomp.split("\n")

count_map = {}

files.each do |file|
  ext = file.split(/[.\/]/).last
  count = `cat #{file.gsub(" ", "\\ ")} | wc -l | tr -d ' '`.chomp.to_i
  current = count_map[ext] || 0

  count_map[ext] = current + count
end

count_map.sort_by { |k, v| -v }.each do |ext, count|
  puts "#{ext}\t#{count}"
end