Git top contributors by file

print-top-5-contributors-per-file.rb

#!/usr/bin/env ruby

#
# Prints out top 5 contributors per file (as determined by # of commits) on every file in the repository
#

files = `git ls-files`.lines.map(&:chomp)

stats_by_file = {}
files.each_with_index do |file, index|
  puts "On #{index+1} of #{files.length}: #{file}"
  contributions = `git shortlog #{file} --summary --email --numbered`.lines.map(&:chomp)
  stats_by_file[file] = contributions[0..4]
  stats_by_file[file].each do |contribution|
    puts "  #{contribution}"
  end
  puts
end