Rebuild CTAGS including only bundled gems and rails project files

ctags.rake

desc "Regenerate tags (CTAGS)"
task :ctags do
  puts " * Regenerating Tags"
  excludes = %w{
      .git
      .git*
      *.yml
      app/views
      app/assets
      coverage
      config
      test/coverage
      spec
      lib/tasks
      lib/assets
      doc
      features
      public
      log
      tmp
  }
  excludes_options = excludes.map{|e| "--exclude=#{e}"}.join(' ')
  system("bundle show --paths | xargs ctags -R")
  system("ctags -V -a -R #{excludes_options} *")
end