Execute focused specs from vim; Detects bundler.

.vimrc.vim

" Execute open rspec buffer
" Thanks to Ian Smith-Heisters
function! RunSpec(args)
  if exists("b:rails_root")
    if filereadable(b:rails_root . "/Gemfile")
      let spec = "bundle exec rspec"
    elseif filereadable(b:rails_root . "/script/spec")
      let spec = b:rails_root . "/script/spec"
    else
      let spec = "rspec"
    end
  end
  let cmd = ":! " . spec . " % -cfn " . a:args
  execute cmd
endfunction

" Mappings
" run one rspec example or describe block based on cursor position
map !s :call RunSpec("-l " . <C-r>=line('.')<CR>)
" run full rspec file
map !S :call RunSpec("")