ctags generator for ruby project using bundle

ruby_ctags.rb

#!/usr/bin/env ruby
require 'bundler'

class CTagsService
  def call
    trap_int_signal
    system(command)
    system(['mv ', tmpfile, ' .git/tags'].join)
  end
  
  private
  
  def tmpfile
    @tmpfile ||= ['.git/tags.', Process.pid].join
  end

  def directories
    Bundler.load.specs.map(&:full_gem_path) << Dir.pwd
  end

  def trap_int_signal
    Signal.trap('INT') do
      remove_tmpfile
      puts 'aborted, exiting...'
      exit
    end
  end
  
  def remove_tempfile
    system(['rm -f ', tmpfile].join)
  end

  def command
    [].tap do |command|
      command << 'ctags --tag-relative -Rf'
      command << tmpfile
      command << '--exclude=.git --languages=-javascript,sql'
      command += directories
      command << '> /dev/null 2>&1'
    end.join(' ')
  end
end

CTagService.new.call if __FILE__ == $0