let g:syntastic_scss_checkers=['']
" do stuff you want to do on every buffer enter event

" guard to end loading if it has been loaded for the currently edited file
if g:localvimrc_sourced_once_for_file
  finish
endif

" do stuff you want to do only once for a edited file

" guard to end loading if it has been loaded for the running vim instance
if g:localvimrc_sourced_once
  finish
endif

" do stuff you want to do only once for a running vim instance