#!/usr/bin/env ruby

tag = ARGV[0]

if tag
  timestamp = `date -u +'%Y%m%d%H%M%S'`
  full_tag = "#{tag}/#{timestamp}"
  tag_exists = `git log HEAD --no-walk -1 --pretty='%h%d'`.include? "tag: #{tag}"

  if tag_exists
    puts "Already tagged #{tag}!"
    exit 0
  end

  `git tag #{full_tag}`
  `git push origin #{full_tag}`
end