update_cbuffer.vim

function! s:update_cbuffer_growl()
ruby << EOC
  line = VIM::Buffer.current.line
  system("growlnotify -a MacVim -m '#{line}'")
EOC
endfunction

function! s:update_cbuffer()
  augroup update-cbuffer
    autocmd!
    autocmd TextChanged * call <SID>update_cbuffer_growl()
  augroup END
endfunction

command! -bar UpdateCbuffer call <SID>update_cbuffer()