List of TODOs in ./app/ decorated with blame sorted by time git grep blame

todos.rb

require 'date'

target = ARGV[1] || "."

files = %x(git grep -n 'TODO*' #{target})

lines = []
length_author = 0
length_file = 0

files.each_line do |line|
  m = line.match(/([^:]*):(\d+):(.*)/)

  l = {
    path: m[1],
    num: m[2],
    msg: m[3].strip
  }
  length_file = [length_file, l[:path].length + l[:num].length + 1].max

  blame = %x(git blame -p -L #{l[:num]},+1 #{l[:path]})
  blame.each_line do |bline|
    if m = bline.match(/^author\s(.*)$/)
      l[:author] = m[1]
      length_author = [length_author, l[:author].length].max
    elsif m = bline.match(/^author\-time\s(\d+)$/)
      l[:datetime] = DateTime.strptime(m[1],'%s')
    end
  end

  lines << l
end

lines.sort_by!{ |l| l[:datetime] }.reverse!

lines.each do |l|
  path_num = "#{l[:path]}:#{l[:num]}"
  puts "(#{l[:datetime].to_date} #{l[:author].ljust(length_author)}) #{path_num.ljust(length_file)} #{l[:msg]}"
end

You can execute this directly

$ curl -sSL http://man.as/TODOs | ruby