git_days.rb

dir = ARGV.last || '.git'
git_cmd = "git --git-dir=#{dir} --no-pager log --no-merges --date-order --format=format:'%at	%h	%an	%s'"

r, w = IO.pipe
spawn({}, git_cmd, :out => w)

def bold(text)
  "\033[1m#{text}\033[0m"
end

def normalized(time)
  time.strftime("%F")
end

trap(:INT) do
  puts
  exit
end

memo = Time.now + 86_400
r.each do |line|
  begin
    parts = line.split("\t")
    time = Time.at(parts.shift.to_i)
    if normalized(time) != normalized(memo)
      puts
      puts bold(time.strftime("%A, %B %e, %Y"))
      memo = time
    end
    puts "* " + parts.join(" ")
  rescue Errno::EPIPE
    break
  end
end