List code owners

list_code_owners.rb

def walk(start = ".", prefix = "")
  Dir.foreach(start) do |x|
    next if x[0] == "."

    path = File.join(start, x)
    next if File.symlink?(path)

    print_directory(path, prefix) if File.directory?(path)
  end
end

def print_directory(path, prefix)
  owners = direct_owners(path)

  if owners.size > 0
    puts "#{prefix}#{path}" + "/" # remove this line if you want; just prints directories
    print_owners(owners, prefix)

    puts
    walk(path, prefix + "  ")
  end
end

def print_owners(owners, prefix)
  owners.each { |o| puts "#{prefix}  #{o}" }
end

def direct_owners(path, limit: nil, user_count: 5)
  owners = `git log --pretty=format:"%an%x09" #{path} | sort | uniq -c | sort -n -r`.split("\n")
  owners = owners.take(limit) if limit
  owners.reject! { |o| o.to_i < user_count }
  owners
end