module Minitest

def guard_reporter
  guards = Array(reporter.reporters.detect { |r| r.class.name == "Guard::Minitest::Reporter" })
  return guards unless ENV['RM_INFO']
  warn 'RM_INFO is set thus guard reporter has been dropped' unless guards.empty?
  []
end

def plugin_minitest_reporter_init(options)
  if defined?(Minitest::Reporters) && Minitest::Reporters.reporters
    reporter.reporters = Minitest::Reporters.reporters + guard_reporter
    reporter.reporters.each do |reporter|
      reporter.io = options[:io]
      reporter.add_defaults(options.merge(:total_count => total_count(options))) if reporter.respond_to? :add_defaults
    end
  end
end

def total_count(options)
  filter = options[:filter] || '/./'
  filter = Regexp.new $1 if filter =~ /\/(.*)\//
  Minitest::Runnable.runnables.map(&:runnable_methods).flatten.find_all { |m|
    filter === m || filter === "#{self}##{m}"
  }.size
end