A `docker run` that would stay attached when containers restart.

docker-run.rb

#!/usr/bin/env ruby
# This script is equivalent to a `docker run` that would stay attached when containers restart.

require 'open3'
require 'time'

cmd = ["/usr/bin/docker", "run", "-d"] + ARGF.argv
Open3.popen3(*cmd) do |stdin, stdout, stderr, thread|
  puts stderr.read
  exit_status = thread.value
  if exit_status != 0
    return exit exit_status.to_i
  end

  id = stdout.read.strip
  puts id
  loop do
    last = Time.now
    system "docker wait #{id}"
    curr = Time.now
    diff = curr - last
    if diff < 1
      exit -1
    end
  end
end